Form 10-Q - Quarterly report [Sections 13 or 15(d)]

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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, DC 20549

FORM 10-Q

(Mark One)


☒			QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended September 30, 2024


☐			TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from to

Commission File Number: 001-35518

SUPERNUS PHARMACEUTICALS, INC.

(Exact name of registrant as specified in its charter)

Delaware

20-2590184

(State or other jurisdiction of
incorporation or organization)

(I.R.S. Employer
Identification No.)

9715 Key West Avenue

Rockville

20850

(Address of principal executive offices)

(Zip Code)

(301) 838-2500

(Registrant’s telephone number, including area code)

Indicate by check mark whether the registrant: (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. ☒ Yes ☐ No

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files).

☒ Yes No ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

Large accelerated filer

☒

Accelerated filer

☐

Non-accelerated filer

☐

Smaller reporting company

☐

Emerging growth company

☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. o

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). ☐ Yes ☒ No

Securities registered pursuant to Section 12(b) of the Exchange Act

Title of each class

Outstanding at October 30, 2024

Trading Symbol

Name of each exchange on which registered

Common Stock, $0.001 par value per share

55,219,273

SUPN

The Nasdaq Global Market

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SUPERNUS PHARMACEUTICALS, INC.

FORM 10-Q — QUARTERLY REPORT

FOR THE QUARTERLY PERIOD ENDED September 30, 2024


			Page No.
PART I — FINANCIAL INFORMATION
Item 1. Unaudited Condensed Consolidated Financial Statements
Condensed Consolidated Balance Sheets			3
Condensed Consolidated Statements of Earnings (Loss)			4
Condensed Consolidated Statements of Comprehensive Earnings (Loss)			5
Condensed Consolidated Statements of Changes in Stockholders' Equity			6
Condensed Consolidated Statements of Cash Flows			8
Notes to Condensed Consolidated Financial Statements			9
Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations			23
Item 3. Quantitative and Qualitative Disclosures about Market Risk			31
Item 4. Controls and Procedures			32
PART II — OTHER INFORMATION
Item 1. Legal Proceedings			32
Item 1A. Risk Factors			36
Item 2. Unregistered Sales of Equity Securities and Use of Proceeds			36
Item 3. Defaults Upon Senior Securities			37
Item 4. Mine Safety Disclosures			37
Item 5. Other Information			37
Item 6. Exhibits			37
SIGNATURES			39

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PART I — FINANCIAL INFORMATION

Supernus Pharmaceuticals, Inc.

Condensed Consolidated Balance Sheets

(in thousands, except share data)


	September 30,		December 31,
	2024		2023
	(unaudited)
Assets
Current assets
Cash and cash equivalents	$	31,673	$	75,054
Marketable securities	371,537		179,820
Accounts receivable, net	145,408		144,155
Inventories, net	63,981		77,408
Prepaid expenses and other current assets	27,404		16,676
Total current assets	640,003		493,113
Long-term marketable securities	—		16,617
Property and equipment, net	11,876		13,530
Intangible assets, net	540,156		599,889
Goodwill	117,019		117,019
Other assets	33,647		37,505
Total assets	$	1,342,701	$	1,277,673

Liabilities and stockholders’ equity
Current liabilities
Accounts payable and accrued liabilities	$	75,803	$	79,569
Accrued product returns and rebates	169,124		154,274
Contingent consideration, current portion	46,581		52,070
Other current liabilities	—		4,283
Total current liabilities	291,508		290,196
Contingent consideration, long-term	403		1,380
Operating lease liabilities, long-term	28,926		33,196
Deferred income tax liabilities, net	7,364		24,963
Other liabilities	7,350		6,422
Total liabilities	335,551		356,157

Commitments and contingencies (Note 14)

Stockholders’ equity
Common stock, $0.001 par value; 130,000,000 shares authorized; 55,219,273 and 54,723,356 shares issued and outstanding as of September 30, 2024 and December 31, 2023, respectively	55		55
Additional paid-in capital	465,919		439,493
Accumulated other comprehensive earnings (loss), net of tax	78		(593)
Retained earnings	541,098		482,561
Total stockholders’ equity	1,007,150		921,516

Total liabilities and stockholders’ equity	$	1,342,701	$	1,277,673

See accompanying notes.

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Supernus Pharmaceuticals, Inc.

Condensed Consolidated Statements of Earnings (Loss)

(in thousands, except share and per share data)


	Three Months Ended September 30,				Nine Months Ended September 30,
	2024		2023		2024		2023
	(unaudited)				(unaudited)
Revenues
Net product sales	$	170,302	$	149,004	$	471,301	$	417,915
Royalty, licensing and other revenues	5,387		4,876		16,357		25,292
Total revenues	175,689		153,880		487,658		443,207

Costs and expenses
Cost of goods sold(a)	17,583		19,601		51,808		64,152
Research and development	29,036		22,655		80,149		68,246
Selling, general and administrative	69,753		82,700		242,173		255,079
Amortization of intangible assets	19,488		21,242		59,733		61,316
Contingent consideration gain	(1,016)		(456)		(6,466)		(1,313)
Total costs and expenses	134,844		145,742		427,397		447,480

Operating earnings (loss)	40,845		8,138		60,261		(4,273)

Other income (expense)
Interest and other income, net	4,098		1,751		11,227		8,467
Interest expense	—		—		—		(2,415)
Total other income (expense)	4,098		1,751		11,227		6,052

Earnings before income taxes	44,943		9,889		71,488		1,779

Income tax expense	6,446		25,865		12,951		1,638
Net earnings (loss)	$	38,497	$	(15,976)	$	58,537	$	141

Earnings (loss) per share
Basic	$	0.70	$	(0.29)	$	1.06	$	0.00
Diluted	$	0.69	$	(0.29)	$	1.05	$	0.00

Weighted average shares outstanding
Basic	55,149,760		54,608,963		54,977,199		54,498,687
Diluted	56,016,350		54,608,963		55,791,185		55,574,922

_____________________________

(a) Excludes amortization of acquired intangible assets

See accompanying notes.

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Supernus Pharmaceuticals, Inc.

Condensed Consolidated Statements of Comprehensive Earnings (Loss)

(in thousands)


	Three Months Ended September 30,				Nine Months Ended September 30,
	2024		2023		2024		2023
	(unaudited)				(unaudited)
Net earnings (loss)	$	38,497	$	(15,976)	$	58,537	$	141
Other comprehensive gain
Unrealized gain on marketable securities, net of tax	450		569		671		2,004
Other comprehensive gain	450		569		671		2,004
Comprehensive earnings (loss)	$	38,947	$	(15,407)	$	59,208	$	2,145

See accompanying notes.

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Supernus Pharmaceuticals, Inc.

Condensed Consolidated Statements of Changes in Stockholders’ Equity

Nine Months Ended September 30, 2024 and 2023

(unaudited, in thousands, except share data)


j	Common Stock			Additional Paid-in Capital		Accumulated Other Comprehensive Earnings (Loss)		Retained Earnings		Total Stockholders’ Equity
	Shares	Amount
Balance, December 31, 2023	54,723,356	$	55	$	439,493	$	(593)	$	482,561	$	921,516
Share-based compensation expense related to employee stock purchase plan and share-based awards	—	—		5,897		—		—		5,897
Issuance of common stock related to employee stock purchase plan and share-based awards, net of taxes withheld	241,960	—		1,570		—		—		1,570
Net earnings	—	—		—		—		124		124
Unrealized gain on marketable securities, net of tax	—	—		—		59		—		59
Balance, March 31, 2024	54,965,316	55		446,960		(534)		482,685		929,166
Share-based compensation expense related to employee stock purchase plan and share-based awards	—	—		6,552		—		—		6,552
Issuance of common stock related to employee stock purchase plan and share-based awards, net of taxes withheld	80,733	—		1,658		—		—		1,658
Net earnings	—	—		—		—		19,916		19,916
Unrealized gain on marketable securities, net of tax	—	—		—		162		—		162
Balance, June 30, 2024	55,046,049	55		455,170		(372)		502,601		957,454
Share-based compensation expense related to employee stock purchase plan and share-based awards	—	—		7,674		—		—		7,674
Issuance of common stock related to employee stock purchase plan and share-based awards, net of taxes withheld	173,224	—		3,075		—		—		3,075
Net earnings	—	—		—		—		38,497		38,497
Unrealized gain on marketable securities, net of tax	—	—		—		450		—		450
Balance, September 30, 2024	55,219,273	$	55	$	465,919	$	78	$	541,098	$	1,007,150

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Supernus Pharmaceuticals, Inc.

Condensed Consolidated Statements of Changes in Stockholders’ Equity

Nine Months Ended September 30, 2024 and 2023

(unaudited, in thousands, except share data)


	Common Stock			Additional Paid-in Capital		Accumulated Other Comprehensive Earnings (Loss)		Retained Earnings		Total Stockholders’ Equity
	Shares	Amount
Balance, December 31, 2022	54,253,796	$	54	$	408,115	$	(3,210)	$	481,245	$	886,204
Share-based compensation expense related to employee stock purchase plan and share-based awards	—	—		6,306		—		—		6,306
Issuance of common stock related to employee stock purchase plan and share-based awards, net of taxes withheld	216,826	—		1,811		—		—		1,811
Net earnings	—	—		—		—		16,948		16,948
Unrealized gain on marketable securities, net of tax	—	—		—		881		—		881
Balance, March 31, 2023	54,470,622	54		416,232		(2,329)		498,193		912,150
Share-based compensation expense related to employee stock purchase plan and share-based awards	—	—		6,088		—		—		6,088
Issuance of common stock related to employee stock purchase plan and share-based awards, net of taxes withheld	122,279	1		1,946		—		—		1,947
Net loss	—	—		—		—		(831)		(831)
Unrealized gain on marketable securities, net of tax	—	—		—		554		—		554
Balance, June 30, 2023	54,592,901	55		424,266		(1,775)		497,362		919,908
Share-based compensation expense related to employee stock purchase plan and share-based awards	—	—		7,920		—		—		7,920
Issuance of common stock related to employee stock purchase plan and share-based awards, net of taxes withheld	37,857	—		(230)		—		—		(230)
Net loss	—	—		—		—		(15,976)		(15,976)
Unrealized gain on marketable securities, net of tax	—	—		—		569		—		569
Balance, September 30, 2023	54,630,758	$	55	$	431,956	$	(1,206)	$	481,386	$	912,191

See accompanying notes.

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Supernus Pharmaceuticals, Inc.

Condensed Consolidated Statements of Cash Flows

(in thousands)


	Nine Months Ended September 30,
	2024		2023
	(unaudited)
Cash flows from operating activities
Net earnings	$	58,537	$	141
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization	61,569		63,183
Amortization of deferred financing costs and debt discount	—		532
Amortization of premium/discount on marketable securities	2,497		(849)
Change in fair value of contingent consideration	(6,466)		(1,313)
Realized gains from sales of marketable securities	(9)		—
Other noncash adjustments, net	8,281		10,485
Share-based compensation expense	20,123		20,314
Deferred income tax benefit	(20,064)		(15,255)
Changes in operating assets and liabilities:
Accounts receivable	(1,253)		21,155
Inventories	12,619		1,082
Prepaid expenses and other assets	(8,542)		(8,138)
Accrued product returns and rebates	14,850		10,808
Accounts payable and other liabilities	(14,597)		(36,018)
Net cash provided by operating activities	127,545		66,127

Cash flows from investing activities
Purchases of marketable securities	(542,608)		—
Maturities of marketable securities	365,891		335,297
Purchases of property and equipment	(512)		(587)
Net cash provided by (used in) investing activities	(177,229)		334,710

Cash flows from financing activities
Proceeds from Credit Line	—		93,000
Payments on Credit Line	—		(93,000)
Payment on convertible notes	—		(402,500)
Proceeds from issuance of common stock	8,031		5,518
Employee taxes paid related to net share settlement of equity awards	(1,728)		(1,990)
Net cash provided by (used in) financing activities	6,303		(398,972)

Net change in cash and cash equivalents	(43,381)		1,865
Cash and cash equivalents at beginning of year	75,054		93,120
Cash and cash equivalents at end of period	$	31,673	$	94,985

Supplemental cash flow information
Cash paid for interest on debt	$	—	$	1,946
Cash paid for income taxes	40,343		27,055
Cash paid for operating leases	13,224		13,242

Noncash investing and financing activities
Lease assets obtained for new operating leases	$	3,547	$	5,903

See accompanying notes.

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Supernus Pharmaceuticals, Inc.

Notes to Condensed Consolidated Financial Statements (unaudited)

1. Business Organization

Supernus Pharmaceuticals, Inc. (the Company, see Consolidation in Note 2, Summary of Significant Accounting Policies) is a biopharmaceutical company focused on developing and commercializing products for the treatment of central nervous system (CNS) diseases. The Company's diverse neuroscience portfolio includes approved treatments for epilepsy, migraine, attention-deficit hyperactivity disorder (ADHD), hypomobility in Parkinson’s Disease (PD), cervical dystonia, chronic sialorrhea, and dyskinesia in PD patients receiving levodopa-based therapy. The Company is developing a broad range of novel CNS product candidates including new potential treatments for hypomobility in PD, epilepsy, depression, and other CNS disorders.

The Company has seven commercial products that it markets: Qelbree®, GOCOVRI®, Oxtellar XR®, Trokendi XR®, APOKYN®, XADAGO®, and MYOBLOC®. In addition, SPN-830 (apomorphine infusion device) is a late-stage drug/device combination product candidate for the continuous treatment of motor fluctuations ("OFF" episodes) in PD patients that are not adequately controlled with oral levodopa and one or more adjunct PD medications. In August 2024, the Company resubmitted to the U.S Food and Drug Administration (FDA) the New Drug Application (NDA) for apomorphine infusion device (SPN-830) for the continuous treatment of motor fluctuations ("OFF" episodes) in Parkinson’s disease. On August 16, 2024, the FDA acknowledged the resubmission of the NDA for the apomorphine infusion device (SPN-830). The resubmission is considered filed, with a user fee goal date (PDUFA date) of February 1, 2025.

2. Summary of Significant Accounting Policies

Basis of Presentation

The Company’s unaudited condensed consolidated financial statements have been prepared in accordance with the requirements of the U.S. Securities and Exchange Commission (SEC) for interim financial information. As permitted under Generally Accepted Accounting Principles in the United States (U.S. GAAP), certain notes and other information have been omitted from the interim unaudited condensed consolidated financial statements presented in this Quarterly Report on Form 10-Q. Therefore, these unaudited condensed consolidated financial statements should be read in conjunction with the Company’s most recent Annual Report on Form 10-K, for the year ended December 31, 2023, filed with the SEC.

In management’s opinion, the unaudited condensed consolidated financial statements include all normal and recurring adjustments necessary for a fair presentation of the Company’s financial position, results of operations, and cash flows. The results of operations for any interim period are not necessarily indicative of the Company’s future quarterly or annual results.

The Company, which is primarily located in the U.S., operates in one operating segment.

Reclassifications

The prior year amount related to the caption Employee taxes paid related to net share settlement of equity awards in the condensed consolidated statements of cash flows has been reclassified to conform to current year presentation. The reclassification did not affect the other condensed consolidated financial statements.

Consolidation

The Company's unaudited condensed consolidated financial statements include the accounts of Supernus Pharmaceuticals, Inc. and its wholly owned subsidiaries. These are collectively referred to herein as "Supernus" or "the Company." Supernus Pharmaceuticals, Inc. and each of its subsidiaries are distinct legal entities. All material intercompany transactions and balances have been eliminated in consolidation.

The unaudited condensed consolidated financial statements reflect the consolidation of entities in which the Company has a controlling financial interest. In determining whether there is a controlling financial interest, the Company considers if it has a majority of the voting interests of the entity, or if the entity is a variable interest entity (VIE) and if the Company is the primary beneficiary. In determining the primary beneficiary of a VIE, the Company evaluates whether it has both: the power to direct the activities of the VIE that most significantly impact the VIE's economic performance; and the obligation to absorb losses of, or the right to receive benefits from the VIE that could potentially be significant to that VIE. The Company's judgment with respect to its level of influence or control of an entity involves the consideration of various factors, including the form of an ownership interest; representation in the entity's governance; the size of the investment; estimates of future cash flows; the ability to

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participate in policymaking decisions; and the rights of the other investors to participate in the decision making process, including the right to liquidate the entity, if applicable. If the Company is not the primary beneficiary of the VIE, and an ownership interest is maintained in the entity, the interest is accounted for under the equity or cost methods of accounting, as appropriate.

The Company continuously assesses whether it is the primary beneficiary of a VIE as changes to existing relationships or future transactions may affect its conclusions.

Use of Estimates

The Company bases its estimates on: historical experience; forecasts; information received from its service providers; information from other sources, including public and proprietary sources; and other assumptions that the Company believes are reasonable under the circumstances. Actual results could differ materially from the Company’s estimates. The Company periodically evaluates the methodologies employed in making its estimates.

Advertising Expense

Advertising expense includes the cost of promotional materials and activities, such as printed materials and digital marketing, marketing programs and speaker programs. The cost of the Company's advertising efforts is expensed as incurred.

The Company incurred approximately $19.6 million and $67.5 million in advertising expense for the three and nine months ended September 30, 2024, respectively, and approximately $25.1 million and $76.9 million for the three and nine months ended September 30, 2023. These expenses are recorded as a component of Selling, general and administrative expenses in the unaudited condensed consolidated statements of earnings (loss).

Insurance Recoveries

The Company has several policies with third-party insurers that provide for the recovery of certain costs incurred by the Company. The Company records our rights to insurance recoveries as a receivable when the respective costs are reimbursable under applicable insurance policies, it is probable that such costs will be reimbursed, and reimbursement can be reasonably estimated. As such, the Company estimates the percentage of costs that will be reimbursed by the insurance provider to determine the proper amount to record for the insurance recovery receivable.

The Company recorded approximately $11.5 million and $12.0 million of insurance recoveries during the three and nine months ended September 30, 2024, respectively. There were no insurance recoveries during the three and nine months ended September 30, 2023. To date, there have not been any material adjustments to our prior estimates of the insurance recovery receivable. Insurance recoveries recognized in fiscal year 2024 were recorded as a reduction to Selling, general and administrative expenses.

Recently Issued Accounting Pronouncements and Disclosure Rules

New Accounting Pronouncements Not Yet Adopted

Accounting Standards Update (ASU) 2023-07, Improvements to Reportable Segment Disclosures (Topic 280) - The new standard, issued in November 2023, improves reportable segment disclosure requirements, primarily through enhanced disclosures about significant segment expenses that are regularly provided to the chief operating decision maker. ASU 2023-07 also clarifies that entities with a single reportable segment are subject to both new and existing reporting requirements under Topic 280. The standard is effective for fiscal years beginning after December 15, 2023, and interim periods within fiscal years beginning after December 15, 2024, on a retrospective basis, with early adoption permitted. The Company plans to adopt the guidance for the fiscal year ending December 31, 2024. The Company expects ASU 2023-07 to require additional disclosures in the notes to its consolidated financial statements. The Company is currently evaluating the effects the adoption of this guidance will have on the consolidated financial statements.

ASU 2023-09, Improvements to Income Tax Disclosures (Topic 740) - The new standard, issued in December 2023, requires entities to disclose additional information with respect to the effective tax rate reconciliation and to disclose the disaggregation by jurisdiction of income tax expense and income taxes paid. The standard is effective with annual periods beginning after December 15, 2024, with early adoption permitted. The standard is to be applied on a prospective basis, although optional retrospective application is permitted. The Company plans to adopt the guidance for the fiscal year ending December 31, 2025. The Company expects ASU 2023-09 to require additional disclosures in the notes to its consolidated financial statements. The Company is currently evaluating the effects the adoption of this guidance will have on the consolidated financial statements.

SEC Final Climate Rule

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In March 2024, the U.S. Securities and Exchange Commission (SEC) adopted the final rule under SEC Release No. 33-11275, The Enhancement and Standardization of Climate-Related Disclosures for Investors (Final Rule). This rule will require registrants to disclose certain climate-related information in registration statements and annual reports with staggered compliance dates for large accelerated filers for the various aspects of the Final Rule. On April 4, 2024, the SEC issued an order staying the Final Rule. The SEC’s administrative stay is expected to remain in place until the completion of litigation filed in various federal courts challenging, among other things, the agency’s authority to adopt the Final Rule. The Company is currently evaluating the final rule to determine its impact on the Company's disclosures.

3. Disaggregated Revenues

The following table provides information regarding total revenues (dollars in thousands):


	Three Months Ended September 30,				Nine Months Ended September 30,
	2024		2023		2024		2023
	(unaudited)				(unaudited)
Net product sales
Qelbree	$	62,359	$	37,081	$	166,857	$	93,840
GOCOVRI	35,657		32,889		93,922		87,650
Oxtellar XR	29,805		29,644		86,265		82,359
APOKYN	19,867		21,510		53,811		56,324
Trokendi XR	15,318		20,625		48,393		74,734
Other(1)	7,296		7,255		22,053		23,008
Total net product sales	170,302		149,004		471,301		417,915
Royalty, licensing and other revenues	5,387		4,876		16,357		25,292
Total revenues	$	175,689	$	153,880	$	487,658	$	443,207

___________________________________________

(1) Includes net product sales of MYOBLOC, XADAGO and Osmolex ER.

In December 2023, the Company submitted to the FDA a notification of discontinuance to withdraw Osmolex ER from distribution. Distribution of Osmolex ER ceased on April 1, 2024.

The Company recognized noncash royalty revenue of $4.0 million for the nine months ended September 30, 2023. The Company no longer recognizes noncash royalty revenue as ownership of the royalty rights reverted back to the Company during the second quarter of 2023.

4. Investments

Marketable Securities

Unrestricted available-for-sale marketable securities held by the Company are as follows (dollars in thousands):


	September 30, 2024		December 31, 2023
	(unaudited)
Corporate, U.S. government agency and municipal debt securities
Amortized cost	$	371,381	$	197,153
Gross unrealized gains	263		5
Gross unrealized losses	(107)		(721)
Total fair value	$	371,537	$	196,437

As of September 30, 2024, all of our unrestricted available-for-sale marketable securities have contractual maturities of one year or less.

As of September 30, 2024, there was no impairment due to credit loss on any available-for-sale marketable securities.

5. Fair Value of Financial Instruments

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The fair value of an asset or liability represents the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between unrelated market participants.

The Company reports the fair value of assets and liabilities using a three level measurement hierarchy that prioritizes the inputs used to measure fair value. Fair value hierarchy consists of the following three levels:

•Level 1—Valuations based on unadjusted quoted prices in active markets that are accessible at measurement date for identical assets.

•Level 2—Valuations based on quoted prices for similar assets or liabilities in active markets, quoted prices for identical or similar assets or liabilities in markets that are not active and model-based valuations in which all significant inputs are observable in the market, either directly or indirectly (e.g., interest rates; yield curves).

•Level 3—Valuations using significant inputs that are unobservable in the market and inputs that reflect the Company’s own assumptions. These are based on the best information available, including the Company’s own data.

Financial Assets and Liabilities Recorded at Fair Value

The Company’s financial assets and liabilities that are required to be measured at fair value on a recurring basis are as follows (dollars in thousands):


	Fair Value Measurements as of September 30, 2024 (unaudited)
	Total		Level 1		Level 2		Level 3
Assets:
Cash and cash equivalents
Cash	$	31,080	$	31,080	$	—	$	—
Money market funds	593		593		—		—
Marketable securities
Corporate, U.S. government agency and municipal debt securities	371,537		—		371,537		—


Other noncurrent assets
Marketable securities - restricted (SERP)	635		19		616		—
Total assets at fair value	$	403,845	$	31,692	$	372,153	$	—
Liabilities:
Contingent consideration	$	46,984	$	—	$	—	$	46,984
Total liabilities at fair value	$	46,984	$	—	$	—	$	46,984

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	Fair Value Measurements as of December 31, 2023
	Total		Level 1		Level 2		Level 3
Assets:
Cash and cash equivalents
Cash	$	35,957	$	35,957	$	—	$	—
Money market funds	39,097		39,097		—		—
Marketable securities
Corporate, U.S. government agency and municipal debt securities	179,820		—		179,820		—
Long-term marketable securities
Corporate and municipal debt securities	16,617		—		16,617		—
Other noncurrent assets
Marketable securities - restricted (SERP)	568		16		552		—
Total assets at fair value	$	272,059	$	75,070	$	196,989	$	—
Liabilities:
Contingent consideration	$	53,450	$	—	$	—	$	53,450
Total liabilities at fair value	$	53,450	$	—	$	—	$	53,450

The fair value of restricted marketable securities is recorded in Other assets on the condensed consolidated balance sheets. There have been no transfers of assets or liabilities into or out of Level 3 of the fair value hierarchy.

Other Financial Instruments

The carrying amounts of other financial instruments, including accounts receivable, accounts payable, and accrued expenses approximate fair value due to their short-term maturities.

6. Contingent Consideration

The following table provides the current and long-term portions related to the contingent consideration for the USWM Acquisition and Adamas Acquisition (as defined below) (dollars in thousands):


	September 30, 2024		December 31, 2023
Reported under the following captions in the condensed consolidated balance sheets:	(unaudited)
Contingent consideration, current portion	$	46,581	$	52,070
Contingent consideration, long-term	403		1,380
Total	$	46,984	$	53,450

The Company's contingent consideration liabilities are related to the USWM Acquisition in 2020 and the Adamas Acquisition in 2021. The contingent consideration liabilities are measured at fair value using either a Monte Carlo simulation or the income approach. The Company classifies its contingent consideration liabilities as Level 3 fair value measurements based on the significant unobservable inputs used to estimate fair value. These reflect the inputs and assumptions the Company believes would be made by market participants. Changes in any of those inputs together or in isolation may result in significantly lower or higher fair value measurement. The change in fair value is reported on the condensed consolidated statement of earnings (loss) in Contingent consideration gain.

USWM Contingent Consideration

On June 9, 2020 (the USWM Closing Date), the Company completed its acquisition of all the outstanding equity of USWM Enterprises, LLC (USWM Enterprises) (USWM Acquisition). The USWM Acquisition included potential additional contingent consideration payments for regulatory and development milestones and sales-based milestones. As of September 30, 2024, the remaining potential contingent consideration payments are up to $55 million in regulatory and development milestones

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comprised of (1) $25 million related to the FDA's approval of the SPN-830 NDA and (2) $30 million related to the subsequent commercial product launch.

The key assumptions considered in estimating the fair value include the estimated probability and timing of milestone achievement, such as the probability and timing of obtaining regulatory approval, timing of projected revenues, and the discount rate.

Adamas Contingent Consideration

On November 24, 2021 (the Adamas Closing Date), the Company completed its acquisition of all the outstanding equity of Adamas (Adamas Acquisition). The Adamas Acquisition included payment of two non-tradable contingent value rights (CVRs) each of which represents the contractual right to receive a contingent payment upon the achievement of the applicable aggregate worldwide net product sales of GOCOVRI.

Each CVR represents the contractual right to receive a contingent payment of $0.50 per share in cash, less any applicable withholding taxes and without interest, upon the achievement of the applicable milestone (each such amount, a Milestone Payment) in accordance with the terms of a Contingent Value Rights Agreement entered into between the Company and American Stock Transfer & Trust Company, LLC, as rights agent, as further defined in the CVR agreement. One Milestone Payment is payable (subject to certain terms and conditions) upon the first occurrence of the achievement of aggregate worldwide net sales of GOCOVRI in excess of $150 million during any consecutive 12-month period ending on or before December 31, 2024 (Milestone 2024). Another Milestone Payment is payable (subject to certain terms and conditions) upon the first occurrence of the achievement of aggregate worldwide net sales of GOCOVRI in excess of $225 million during any consecutive 12-month period ending on or before December 31, 2025 (Milestone 2025 and, together with Milestone 2024, the Milestones). Each Milestone may only be achieved once. The possible outcomes for the contingent consideration range from $0 to $50.9 million on an undiscounted basis.

The key assumptions considered in estimating the fair value of the Adamas sales-based milestones include the estimated revenue projections, volatility, estimated discount rates and risk-free interest rate.

Change in the Fair Value of Contingent Consideration

The following tables provide a reconciliation of the beginning and ending balances related to the contingent consideration for the USWM Acquisition and Adamas Acquisition (dollars in thousands):


	USWM Acquisition		Adamas Acquisition		Total
Balance at December 31, 2023	$	46,400	$	7,050	$	53,450
Change in fair value recognized in earnings	130		(6,596)		(6,466)
Balance at September 30, 2024 (unaudited)	$	46,530	$	454	$	46,984


	USWM Acquisition		Adamas Acquisition		Total
Balance at December 31, 2022	$	46,270	$	8,697	$	54,967
Change in fair value recognized in earnings	(390)		(923)		(1,313)
Balance at September 30, 2023 (unaudited)	$	45,880	$	7,774	$	53,654

The Company recorded the following changes in fair value of the contingent consideration liability for the USWM milestones:

•The Company recorded a $1.3 million expense and a $0.1 million expense due to the change in fair value of contingent consideration liabilities for the USWM milestones for the three and nine months ended September 30, 2024, respectively. The change in fair value of contingent consideration for the USWM milestones was primarily due to the change in timing of milestone achievement and estimated discount rate in the third quarter of 2024 and passage of time in both periods.

•The Company recorded a $0.7 million expense and a $0.4 million gain due to the change in the fair value of the contingent consideration liabilities for the USWM milestones for the three and nine months ended September 30, 2023, respectively. The change in the fair value of contingent consideration for the USWM milestones was primarily driven by the change in estimated fair value of regulatory and developmental milestones due to passage of time in both periods, as well as the change in timing of milestone achievement and estimated discount rate in the first quarter of 2023.

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The Company recorded the following changes in fair value of the contingent consideration liabilities for the Adamas CVRs:

•The Company recorded a $2.3 million gain and a $6.6 million gain due to the change in fair value of the contingent consideration liabilities for the Adamas CVRs for the three and nine months ended September 30, 2024, respectively. The change in fair value of contingent consideration was primarily due to passage of time.

•The Company recorded a $1.1 million gain and a $0.9 million gain due to the change in fair value of the contingent consideration liabilities for the Adamas CVRs for the three and nine months ended September 30, 2023, respectively. The change in fair value of contingent consideration for the Adamas milestones was primarily due to passage of time and changes in the estimated discount rate.

7. Intangibles Assets, Net

The following table sets forth the gross carrying amounts and related accumulated amortization of intangible assets (dollars in thousands):


	September 30, 2024							December 31, 2023
	(unaudited)
	Remaining Weighted Average Life (Years)	Carrying Amount, Gross		Accumulated Amortization		Carrying Amount, Net		Carrying Amount, Gross		Accumulated Amortization		Carrying Amount, Net
Acquired in-process research and development		$	124,000	$	—	$	124,000	$	124,000	$	—	$	124,000
Intangible assets subject to amortization:
Acquired developed technology and product rights	6.15	661,311		(245,155)		416,156		661,311		(190,395)		470,916
Capitalized patent defense costs	0.00	43,820		(43,820)		—		43,820		(38,847)		4,973
Total intangible assets	6.15	$	829,131	$	(288,975)	$	540,156	$	829,131	$	(229,242)	$	599,889

Amortization expense for intangible assets was $19.5 million and $59.7 million for the three and nine months ended September 30, 2024, and $21.2 million and $61.3 million for the three and nine months ended September 30, 2023, respectively.

U.S. patents covering Trokendi XR and Oxtellar XR will expire no earlier than 2027. The Company entered into settlement agreements that allowed third parties to enter the Trokendi XR market on January 1, 2023. The Company entered into settlement and license agreements that allowed a third party to enter the Oxtellar XR market in September 2024.

The Company entered into settlement and license agreements that allows third parties to enter the XADAGO market in December 2027, or sooner under certain conditions.

8. Debt

Uncommitted Demand Secured Line of Credit

On February 8, 2023, the Company entered into a credit line agreement with UBS (the Credit Line). The Credit Line provides for a revolving line of credit of up to $150 million, which can be drawn at any time. Any fixed rate borrowing will bear interest at a fixed interest rate, equal to the sum of (i) the UBS Fixed Funding Rate (as defined in the Credit Line) plus (ii) the applicable Percentage Spread established in the Credit Line. Any variable rate borrowing will bear interest at a variable interest rate, equal to the sum of (i) the UBS Variable Rate (as defined in the Credit Line) plus (ii) the applicable Percentage Spread established in the Credit Line.

The Credit Line is secured by a first priority lien and security interest in certain of the Company’s assets, including each account of the Company at UBS Financial Services Inc. (the Collateral Account), and other such collateral (collectively, the Collateral), as further defined in the Credit Line. The Company may be required to post additional collateral if the value of the Collateral declines below the required collateral maintenance requirements.

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Upon certain customary events of default, all amounts due under the Credit Line will become immediately due and payable without demand, and UBS has the right, in its discretion, to liquidate, transfer, withdraw or sell all or any part of the Collateral and apply the proceeds to repay any borrowings pursuant to the Credit Line.

The Company has the right to repay any variable rate advance under the Credit Line at any time, in whole or in part, without penalty. The Company may repay any fixed rate advance in whole, but may not repay any fixed rate advance in part. In its discretion and without cause, UBS has the right at any time to demand full or partial payment of amounts borrowed pursuant to the Credit Line and terminate the Credit Line.

On March 30, 2023, the Company borrowed $93.0 million under the Credit Line, which bore a variable interest rate. The funds from this borrowing were used to repay outstanding indebtedness under the 0.625% Convertible Senior Notes Due 2023 (2023 Notes). In the second quarter of 2023, the Company repaid the total principal balance of $93.0 million under the Credit Line and the interest incurred on the Credit Line of $0.7 million. As of September 30, 2024, there was no outstanding debt under the Credit Line.

9. Share-Based Payments

Equity Incentive Plan

On June 14, 2024, the Company's shareholders approved, and the Company has adopted, the Amended and Restated 2021 Equity Incentive Plan (the Amended 2021 Plan) to increase the number of shares of the Company's common stock available for issuance under the 2021 Plan by 4,000,000.

Share-based compensation expense is as follows (dollars in thousands):


	Three Months Ended September 30,				Nine Months Ended September 30,
	2024		2023		2024		2023
	(unaudited)				(unaudited)
Research and development	$	1,350	$	1,254	$	3,946	$	3,458
Selling, general and administrative	6,324		6,666		16,177		16,856
Total	$	7,674	$	7,920	$	20,123	$	20,314

Stock Option

The following table summarizes stock option activities:


	Number of Options	Weighted Average Exercise Price		Weighted Average Remaining Contractual Term (in years)
Outstanding, December 31, 2023	6,583,822	$	29.20	5.90
Granted	1,171,612	$	28.05
Exercised	(336,868)	$	20.23
Forfeited	(251,657)	$	31.71
Outstanding, September 30, 2024 (unaudited)	7,166,909	$	29.34	5.87

As of September 30, 2024 (unaudited):
Vested and expected to vest	7,166,909	$	29.34	5.87
Exercisable	4,560,609	$	27.95	4.33

As of December 31, 2023:
Vested and expected to vest	6,583,822	$	29.20	5.90
Exercisable	4,110,537	$	26.58	4.43

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Restricted Stock Units

The following table summarizes restricted stock unit (RSU) activities:


	Number of RSUs	Weighted Average Grant Date Fair Value per Share
Nonvested, December 31, 2023	300,141	$	36.90
Granted	198,414	$	28.06
Vested	(100,891)	$	36.51
Forfeited	(19,124)	$	34.64
Nonvested, September 30, 2024 (unaudited)	378,540	$	32.48

Performance Share Units

The following table summarizes performance share unit (PSU) activities:


	Performance-Based Units			Market-Based Units			Total PSUs
	Number of PSUs	Weighted Average Grant Date Fair Value per Share		Number of PSUs	Weighted Average Grant Date Fair Value per Share		Number of PSUs	Weighted Average Grant Date Fair Value per Share
Nonvested, December 31, 2023	251,630	$	32.22	20,000	$	28.63	271,630	$	31.96
Granted	252,700	$	26.91	—	$	—	252,700	$	26.91
Vested	(62,980)	$	33.67	—	$	—	(62,980)	$	33.67
Forfeited	(58,050)	$	29.37	—	$	—	(58,050)	$	29.37
Nonvested, September 30, 2024 (unaudited)	383,300	$	28.91	20,000	$	28.63	403,300	$	28.90

10. Earnings (Loss) per Share

The following table sets forth the computation of basic and diluted earnings (loss) per share for the three and nine months ended September 30, 2024 and 2023 (dollars in thousands, except share and per share amounts):


	Three Months Ended September 30,				Nine Months Ended September 30,
	2024		2023		2024		2023
	(unaudited)				(unaudited)
Numerator:
Net earnings (loss)	$	38,497	$	(15,976)	$	58,537	$	141
Denominator:
Weighted average shares outstanding, basic	55,149,760		54,608,963		54,977,199		54,498,687
Effect of dilutive securities:
Stock options and stock awards	866,590		—		813,986		1,076,235
Weighted average shares outstanding, diluted	56,016,350		54,608,963		55,791,185		55,574,922

Earnings (loss) per share, basic	$	0.70	$	(0.29)	$	1.06	$	0.00
Earnings (loss) per share, diluted	$	0.69	$	(0.29)	$	1.05	$	0.00

The following table sets forth the common stock equivalents of outstanding stock-based awards and shares associated with the conversion of the 2023 Notes excluded in the calculation of diluted earnings (loss) per share, because their inclusion

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would be anti-dilutive:


	Three Months Ended September 30,		Nine Months Ended September 30,
	2024	2023	2024	2023
	(unaudited)		(unaudited)
2023 Notes	—	—	—	2,261,312
Stock options and stock awards	712,457	411,506	772,255	486,080

11. Income Tax Expense

The following table provides information regarding the Company’s income tax expense for the three and nine months ended September 30, 2024 and 2023 (dollars in thousands):


	Three Months Ended September 30,						Nine Months Ended September 30,
	2024			2023			2024			2023
	(unaudited)						(unaudited)
Income tax expense	$	6,446		$	25,865		$	12,951		$	1,638
Effective tax rate	14.3		%	261.6		%	18.1		%	92.1		%

Income tax expense was $6.4 million (14.3% effective tax rate) and $13.0 million (18.1% effective tax rate) for the three and nine months ended September 30, 2024, as compared to an income tax expense of $25.9 million (261.6% effective tax rate) and $1.6 million (92.1% effective tax rate) for the three and nine months ended September 30, 2023. The change in both periods was primarily due to higher forecasted earnings before taxes for the three and nine months ended September 30, 2024 as compared to the near break-even forecasted earnings before taxes in 2023.

The Company's effective income tax rates for the three and nine months ended September 30, 2024 vary from the statutory federal tax rate in United States (U.S. federal tax rate) of 21% primarily due to increased tax benefits related to current and prior years research and development tax credits. The Company's effective income tax rates for the three and nine months ended September 30, 2023 vary from the statutory U.S. federal tax rate primarily due to near break-even forecasted earnings before taxes.

The annual forecasted earnings represent the Company's best estimate as of September 30, 2024 and 2023, are subject to change and could have a material impact on the effective tax rate in subsequent periods. Accounting Standard Codification 740, Income Taxes (ASC 740), requires the Company to estimate the annual effective income tax rate for the full year and apply it to pre-tax income (loss) for each interim period, taking into account year-to-date amounts and projected results for the full year.

12. Leases

Operating lease assets and lease liabilities as reported on the condensed consolidated balance sheets are as follows (dollars in thousands):


	Balance Sheet Classification	September 30, 2024		December 31, 2023
		(unaudited)
Assets
Operating lease assets	Other assets	$	26,086	$	28,994
Total lease assets		$	26,086	$	28,994

Liabilities
Operating lease liabilities, current portion	Accounts payable and accrued liabilities	$	9,227	$	8,331
Operating lease liabilities, long-term	Operating lease liabilities, long-term	28,926		33,196
Total lease liabilities		$	38,153	$	41,527

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13. Composition of Other Balance Sheet Items

The following details the composition of other balance sheet items (dollars in thousands for amounts in tables):

Inventories, Net


	September 30, 2024		December 31, 2023
	(unaudited)
Raw materials	$	11,571	$	16,274
Work in process	28,102		31,212
Finished goods	24,308		29,922
Total	$	63,981	$	77,408

Property and Equipment, Net


	September 30, 2024		December 31, 2023
	(unaudited)
Lab equipment and furniture	$	13,174	$	13,069
Leasehold improvements	14,023		14,023
Software	883		883
Computer equipment	1,037		960
	29,117		28,935
Less accumulated depreciation and amortization	(17,241)		(15,405)
Property and equipment, net	$	11,876	$	13,530

Depreciation and amortization expense on property and equipment was approximately $0.6 million and $1.8 million for the three and nine months ended September 30, 2024 respectively, and $0.6 million and $1.9 million for the three and nine months ended September 30, 2023, respectively.

Accounts Payable and Accrued Liabilities


	September 30, 2024		December 31, 2023
	(unaudited)
Accounts payable	$	6,392	$	1,964
Accrued compensation, benefits, & related accruals	20,284		20,722
Accrued sales & marketing	10,466		11,666
Accrued manufacturing expenses	5,573		11,652
Accrued R&D expenses	7,911		10,530
Operating lease liabilities, current portion (1)	9,227		8,331
Accrued royalties (2)	7,849		7,918
Other accrued expenses	8,101		6,786
Total	$	75,803	$	79,569

_______________________________

(1) Refer to Note 12, Leases.

(2) Refer to Note 14, Commitments and Contingencies.

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Accrued Product Returns and Rebates


	September 30, 2024		December 31, 2023
	(unaudited)
Accrued product rebates	$	111,695	$	96,984
Accrued product returns	57,429		57,290
Total	$	169,124	$	154,274

14. Commitments and Contingencies

Product Licenses

The Company has obtained exclusive licenses from third parties for proprietary rights to support the product candidates in the Company's CNS portfolio. Under these license agreements, the Company may be required to pay certain amounts upon the achievement of defined milestones. If these products are ultimately commercialized, the Company is also obligated to pay royalties to third parties, computed as a percentage of net product sales, for each respective product under a license agreement.

Through the USWM Acquisition, the Company acquired licensing agreements with other pharmaceutical companies for APOKYN, XADAGO, and MYOBLOC. The Company is obligated to pay royalties to third parties, computed as a percentage of net product sales, for each of the products under the respective license agreements. The royalty expense incurred for these acquired products is recognized as Cost of goods sold in the condensed consolidated statements of earnings (loss).

Navitor Development Agreement

In April 2020, the Company entered into a development agreement (Development Agreement) with Navitor Pharmaceuticals, Inc. (Navitor Inc.). The Company can terminate the Development Agreement upon 30 days' notice. Under the terms of the Development Agreement, the Company and Navitor Inc. will jointly conduct a Phase II clinical program for NV-5138 (SPN-820) for treatment-resistant depression. The Company agreed to bear certain Phase I and Phase II development costs incurred by either party, up to a maximum of $50 million, which amount could be increased under the terms of the Development Agreement upon Navitor’s request and the Company’s consent. In 2020, the Company paid a one-time, nonrefundable, and non-creditable fee of $10 million for the option to acquire or license NV-5138 (SPN-820) and made a $15 million equity investment representing approximately 13% ownership in Navitor Inc. There are also certain additional payments which could be incurred by the Company that are contingent upon Navitor Inc. achieving defined milestones. These payments include an additional license or acquisition fee depending on whether the Company ultimately licenses or acquires NV-5138 (SPN-820), and subsequent clinical, regulatory and sales milestone payments. The total payments, exclusive of the royalty payments on net sales of NV-5138 (SPN-820) and development costs paid by the Company under the agreement, have the potential to reach $410 million to $475 million, which includes an aggregate upfront payment of $25 million paid in 2020 for the option to acquire or license NV-5138 (SPN-820) and the equity investment, an additional license or acquisition fee depending on whether the Company ultimately licenses or acquires NV-5138 (SPN-820), and subsequent clinical, regulatory and sales based milestone payments. The Company also will have the first right of refusal for any compound with a similar mechanism of action to NV-5138 (SPN-820) on mTORC1 in the central nervous system.

In addition to entering into the Development Agreement in April 2020, as above mentioned, the Company acquired Series D Preferred Shares of Navitor Inc. (the Navitor Shares), an equity investment representing an approximately 13% ownership position in Navitor Inc. As part of a legal restructuring in March 2021, the Company's Navitor Inc. Shares were exchanged for membership interests in Navitor Pharmaceutics LLC (Navitor LLC), which became the sole shareholder of Navitor Inc. The Company has determined that although Navitor LLC is a VIE, the Company does not consolidate the results of this VIE into its financial results because the Company lacks the power to direct the activities that most significantly impact Navitor’s economic performance.

In the second quarter of 2024, the Company consented to payment of additional Phase II development costs for NV-5138 (SPN-820) as they are incurred, but reserves the right to terminate payment of future development costs at its discretion.

The maximum exposure to losses related to Navitor LLC includes the approximately $50 million for Phase I and Phase II development of NV-5138 (SPN-820) already paid by the Company, plus the cost of other development and formulation activities provided by the Company and additional Phase II development costs the Company agreed to pay pursuant to the Development Agreement.

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Subsequent to the Development Agreement entered into in 2020, no additional equity investment has been made or financing has been provided to Navitor Inc. or Navitor LLC.

USWM Enterprise Commitments Assumed

As part of the USWM Acquisition, the Company assumed the remaining commitments of USWM Enterprises and its subsidiaries, which are discussed below.

The Company assumed the annual minimum purchase requirement of MYOBLOC, amounting to an estimated €3.9 million annually, under the contract manufacturing agreement with Merz for manufacture and supply.

MDD US Operations, LLC (formerly US WorldMeds, LLC) and its subsidiary, Solstice Neurosciences, LLC (US) (collectively, the MDD Subsidiaries) entered into a Corporate Integrity Agreement (CIA) with the Office of Inspector General of the U.S. Department of Health and Human Services which was effective in April 2019. Under the CIA, the MDD Subsidiaries agreed to and paid $17.5 million to resolve U.S. Department of Justice allegations that it violated the False Claims Act and committed to the establishment and ongoing maintenance of an effective compliance program. The fine was paid by the MDD Subsidiaries prior to closing of the USWM Acquisition. As part of the USWM Acquisition, the Company assumed the obligations of the CIA and could become liable for payment of certain stipulated monetary penalties in the event of any CIA violations. In addition, the Company continues to maintain a broad array of processes, policies and procedures necessary to comply with the CIA and submitted its final report during the second quarter of 2024.

Claims and Litigation

From time to time, the Company may be involved in various claims, litigation and legal proceedings. These matters may involve patent litigation, product liability and other product-related litigation, commercial and other matters, and government investigations, among others. On a quarterly basis, the Company reviews the status of each significant matter and assesses its potential financial exposure. If the potential loss from any claim, asserted or unasserted, or legal proceeding is considered probable and the amount can be reasonably estimated, the Company will accrue a liability for the estimated loss. Because of uncertainties related to claims, legal proceedings and litigation, accruals will be based on the Company's best estimates based on available information. The Company does not believe that any of these matters will have a material adverse effect on our financial position. The Company may reassess the potential liability related to these matters and may revise these estimates. The process of resolving matters through litigation or other means is inherently uncertain and it is possible that an unfavorable resolution of these matters will adversely affect the Company, its results of operations, financial condition and cash flows.

NAMENDA XR/Namzaric Qui Tam Litigation

On April 1, 2019, Adamas was served with a complaint filed in the United States District Court for the Northern District of California (the District Court) (Case No. 3:18-cv-03018-JCS) against it and several Allergan entities alleging violations of federal and state false claims acts (FCA) in connection with the commercialization of NAMENDA XR and Namzaric by Allergan. The lawsuit is a qui tam complaint brought by an individual, asserting rights of the federal government and various state governments. The lawsuit was originally filed in May 2018 under seal, and Adamas became aware of the lawsuit when it was served. The complaint alleges that patents held by Allergan and Adamas covering NAMENDA XR and Namzaric were procured through fraud on the United States Patent and Trademark Office and that these patents were asserted against potential generic manufacturers of NAMENDA XR and Namzaric to prevent the generic manufacturers from entering the market, thereby wrongfully excluding generic competition resulting in artificially high price being charged to government payors. Adamas' patents in question were licensed exclusively to Forest Laboratories Holdings Limited. The complaint includes a claim for damages of "potentially more than $2.5 billion dollars," treble damages and statutory penalties. To date the federal and state governments have declined to intervene in this action. This case is currently stayed pending Adamas's and Allergan's interlocutory appeal of the District Court's December 11, 2020 order denying Adamas's and Allergan's motion to dismiss the complaint. The appeal is pending in the United States Court of Appeals for the Ninth Circuit (Case No. 21-80005). Argument was held on January 10, 2022. On August 25, 2022, the Ninth Circuit sided with the defendants by reversing the District Court’s public disclosure bar rulings and remanding the case back to the District Court to decide certain issues in the first instance. On October 11, 2022, the plaintiff filed a petition for rehearing with the Ninth Circuit which was denied on November 3, 2022. On December 23, 2022, the defendants filed renewed motions to dismiss directed to the remaining unresolved issue. On March 20, 2023, the District Court entered an order and final judgement dismissing with prejudice the FCA claim while declining to exercise supplemental jurisdiction over the state false claims act claims which were dismissed without prejudice. On April 19, 2023, the plaintiff appealed the District Court's dismissal of the Federal False Claims Act claim. On February 20, 2024, the plaintiff filed a motion for an indicative ruling and to set aside the judgment in the District Court, based on the same arguments raised in his appeal. That motion was fully briefed and the District Court determined that the motion for an indicative ruling was suitable for determination

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without a hearing. On May 7, 2024, the District Court denied the plaintiff’s motion for an indicative ruling. The appeal is fully briefed, and the Ninth Circuit has set oral argument for November 21, 2024.

APOKYN Litigation

On October 3, 2022, Sage Chemical, Inc. and TruPharma, LLC filed a lawsuit in the United States District Court for the District of Delaware (Case No.22-cv-1302) alleging that Supernus Pharmaceuticals, Inc., Britannia Pharmaceuticals Limited, and US WorldMeds Partners, LLC violated state and federal antitrust law in connection with APOKYN. On January 10, 2023, the Company filed motions to dismiss all claims and the lawsuit in its entirety. Between May 9, 2024 and June 4, 2024, the Court ruled on all motions to dismiss, declining to dismiss any claims against the Company, its subsidiaries, or Britannia Pharmaceuticals Limited and dismissing US WorldMeds Partners, LLC, USWM, LLC, and all of the individual defendants (former US WorldMeds executives) out of the case completely. On June 13, 2024, the Court issued a scheduling order that provides for a pretrial conference on September 12, 2025 and a jury trial beginning on September 22, 2025. Pre-trial discovery is ongoing as of the date of this filing. The Company intends to defend itself vigorously. However, the Company can offer no assurances that it will be successful in a litigation.

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Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations

Management’s Discussion and Analysis of Financial Condition and Results of Operations is intended to help the reader understand the results of operations and the financial condition of Supernus Pharmaceuticals, Inc. The interim condensed consolidated financial statements included in this report and this Management’s Discussion and Analysis of Financial Condition and Results of Operations should be read in conjunction with our audited consolidated financial statements and notes thereto for the year ended December 31, 2023 and the related Management’s Discussion and Analysis of Financial Condition and Results of Operations, both of which are contained in our Annual Report on Form 10-K, filed with the Securities and Exchange Commission on February 27, 2024.

In addition to historical information, this Quarterly Report on Form 10-Q contains forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended, which are intended to be covered by the safe harbors created thereby. These forward-looking statements may include declarations regarding the Company’s belief or current expectations of management, such as statements including the words “budgeted,” “anticipate,” “project,” “forecast,” “estimate,” “expect,” “may,” “believe,” “potential,” and similar statements or expressions, which are intended to be among the statements that are forward-looking statements, as such statements reflect the reality of risk and uncertainty that is inherent in our business. Actual results may differ materially from those expressed or implied by such forward-looking statements. Readers are cautioned not to place undue reliance on these forward-looking statements, which are made as of the date this report was filed with the Securities and Exchange Commission. Our actual results and the timing of events could differ materially from those discussed in our forward-looking statements because of many factors, including those set forth under the “Risk Factors” section of our Annual Report on Form 10-K and elsewhere in this report as well as in other reports and documents we file with the Securities and Exchange Commission from time to time. Except as required by law, we undertake no obligation to update any forward-looking statements to reflect events or circumstances occurring after the date of this Quarterly Report on Form 10-Q.

Unless the content requires otherwise, the words "Supernus," "we," "our" and "the Company" refer to Supernus Pharmaceuticals, Inc. and/or one or more of its subsidiaries, as the case may be. These terms are used solely for the convenience of the reader. Supernus Pharmaceuticals, Inc. and each of its subsidiaries are distinct legal entities. For example, MDD US Operations, LLC, a wholly-owned indirect subsidiary of Supernus Pharmaceuticals, Inc., is the exclusive licensee and distributor of APOKYN in the United States and its territories. Adamas Operations, LLC, a wholly-owned indirect subsidiary of Supernus Pharmaceuticals, Inc., wholly owns the patents and patent applications related to GOCOVRI and Osmolex ER and has a license agreement with Supernus Pharmaceuticals, Inc., granting Supernus Pharmaceuticals, Inc. rights to market and sell GOCOVRI and Osmolex ER.

Solely for convenience, in this Quarterly Report on Form 10-Q, the trade names are referred to without the TM symbols and the trademark registrations are referred to without the circled R, but such references should not be construed as any indicator that the Company will not assert, to the fullest extent under applicable law, our rights thereto.

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Overview

We are a biopharmaceutical company focused on developing and commercializing products for the treatment of central nervous system (CNS) diseases. Our diverse neuroscience portfolio includes approved treatments for epilepsy, migraine, attention-deficit hyperactivity disorder (ADHD), hypomobility in Parkinson’s Disease (PD), cervical dystonia, chronic sialorrhea, and dyskinesia in PD patients receiving levodopa-based therapy. We are developing a broad range of novel CNS product candidates including new potential treatments for hypomobility in PD, epilepsy, depression, and other CNS disorders.

We have a portfolio of commercial products and product candidates.

Commercial Products

•Qelbree® (viloxazine) extended-release capsules is a novel non-stimulant product indicated for the treatment of ADHD in adults and pediatric patients 6 years and older. The United States Food and Drug Administration (FDA) approved Qelbree for the treatment of ADHD in pediatric patients 6 to 17 years of age in April 2021, and in adult patients in April 2022. The Company launched Qelbree for pediatric patients in May 2021 and for adult patients in May 2022 in the United States (U.S.).

•GOCOVRI® (amantadine) extended-release capsules is the first and only FDA approved medicine indicated for the treatment of dyskinesia in patients with PD receiving levodopa-based therapy, with or without concomitant dopaminergic medications, and as an adjunctive treatment to levodopa/carbidopa with PD experiencing "OFF" episodes.

•Oxtellar XR® (oxcarbazepine) is indicated as therapy for the treatment of partial onset seizures in patients 6 years of age and older. It is also the first once-daily extended-release oxcarbazepine product indicated for the treatment of epilepsy in the U.S. market.

•Trokendi XR® (topiramate) is the first once-daily extended-release topiramate product indicated for the treatment of epilepsy in patients 6 years of age and older in the U.S. market. It is also indicated for the prophylaxis of migraine headache in adults and adolescents 12 years and older.

•APOKYN® (apomorphine hydrochloride injection) is a product indicated for the acute, intermittent treatment of hypomobility, "OFF" episodes ("end-of-dose wearing off" and unpredictable "ON/OFF" episodes) in patients with advanced PD.

•XADAGO® (safinamide) is a once-daily product indicated as adjunctive treatment to levodopa/carbidopa in patients with PD experiencing "OFF" episodes.

•MYOBLOC® (rimabotulinumtoxinB injection) is a product indicated for the treatment of cervical dystonia and chronic sialorrhea in adults. It is the only botulinum toxin type B available on the market.

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Research and Development

We are committed to the development of innovative product candidates in neurology and psychiatry, including the following:

SPN-830 (apomorphine infusion device)

SPN-830 is a late-stage drug/device combination product candidate for the continuous treatment of motor fluctuations ("OFF" episodes) in PD patients that are not adequately controlled with oral levodopa and one or more adjunct PD medications. If approved, it would be the only continuous infusion of apomorphine available in the U.S. and an important step for PD patients that would have otherwise been candidates for potentially invasive surgical procedures, such as deep brain stimulation. Continuous slow infusion may also limit some of the side effects of a bolus injection of apomorphine.

In April 2024, the FDA issued a Complete Response Letter regarding the NDA for SPN-830. In August 2024, we resubmitted the New Drug Application (NDA) for SPN-830 to the FDA. For further discussion, see Operational Highlights section below.

SPN-820 (NV-5138)

SPN-820 is a first-in-class, orally active small molecule that increases the brain mechanistic target of rapamycin complex 1 (mTORC1) mediated synaptic function intracellularly. SPN-820 does not bind to or modulate any cell surface receptors and therefore is unlikely to have abuse potential given lack of binding to targets implicated in drug abuse. In addition, unlike leucine, it is not incorporated into proteins during protein synthesis, and therefore, it is more available at the target site in the brain than leucine.

SPN-817 (huperzine A)

SPN-817 represents a novel mechanism of action (MOA) for an anticonvulsant. SPN-817 is a novel synthetic form of huperzine A, whose MOA includes potent acetylcholinesterase inhibition, with pharmacological activities in CNS conditions such as epilepsy. The development will initially focus on the drug's anticonvulsant activity, which has been shown in preclinical models to be effective for the treatment of partial seizures and Dravet Syndrome. SPN-817 is in clinical development and has received Orphan Drug designation for several epilepsy indications from the FDA.

Operational Highlights

•Total IQVIA prescriptions for Qelbree were 194,025 in the third quarter 2024, an increase of 19% compared to the prior year period.

•In August 2024, the Company resubmitted to the FDA the NDA for apomorphine infusion device (SPN-830) for the continuous treatment of motor fluctuations ("OFF" episodes) in Parkinson’s disease. On August 16, 2024, the FDA

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acknowledged the resubmission of the NDA for the apomorphine infusion device (SPN-830). The resubmission is considered filed, with a user fee goal date (PDUFA date) of February 1, 2025.

Product Pipeline Update

SPN-820 – Novel first-in-class molecule that increases mTORC1 mediated synaptic function for depression

•In October 2024, the Company announced and discussed the data from its exploratory open-label Phase 2a clinical study of SPN-820 in adults with major depressive disorder (MDD). The data were based on 40 enrolled subjects, of which 38 completed the 10-day treatment period. The primary objective of the study was to assess efficacy in MDD, as well as the onset of efficacy. The Phase 2a study demonstrated rapid and substantial decrease in depressive symptoms, and 80% decrease in suicidal ideation. SPN-820 was well-tolerated with few adverse events.

•In addition, the Company presented new data at the 2024 Psych Congress in October 2024 that demonstrate a rapid Montgomery–Asberg Depression Rating Scale (MADRS) response rate (≥50% reduction) and remission (MADRS ≤10), reaching 50.0% and 35.0% of participants, respectively, at 4 hours, with additional improvement to 84.2% and 63.2% of participants by Day 10.

•The Company expects to complete enrollment in the ongoing Phase 2b multi-center randomized double-blind placebo-controlled parallel design study of SPN-820 in adults with treatment-resistant depression in November 2024. The study will examine the efficacy and safety of SPN-820 over a course of five weeks of treatment in approximately 236 patients in approximately 50 clinical sites. The primary outcome measure is the change from baseline to end of treatment period on the MADRS Total Score. Topline data from the Phase 2b trial are expected in the first half of 2025.

SPN-817 – Novel first-in-class highly selective AChE inhibitor for epilepsy

•The Company is conducting an open label Phase 2a study in patients with treatment-resistant seizures. In May 2024, the Company announced data from a planned interim analysis from the initial stage of the study (Stage A). The Company has now completed enrollment of Stage A and is reporting topline data from all subjects with focal seizures who received the 3mg and 4mg twice daily doses, completed the maintenance period (n=10), and enrolled in the post-maintenance extension period (n=6).

•Maintenance period:

◦56% median seizure reduction from baseline.

◦70% of subjects had 30% or more seizure reduction.

◦60% of subjects had 50% or more seizure reduction.

◦30% of subjects had 75% or more seizure reduction.

•Post-maintenance extension period:

◦66% median seizure reduction from baseline.

◦83% of subjects had 30% or more seizure reduction.

◦67% of subjects had 50% or more seizure reduction.

◦50% of subjects had 75% or more seizure reduction.

•Seizure Freedom:

◦Maintenance period: 1 out of 10 subjects (10%) who completed a post-baseline seizure diary had at least one four-week seizure free period.

◦Post-maintenance extension period: 1 out of 6 subjects (17%) had at least one four-week seizure free period.

•Assessment by EpiTrack®, a validated cognitive screening tool designed for patients with epilepsy, indicated that 75% of 16 subjects was equally split between those who improved and those who had no change in cognitive function.

•SPN-817 was safe and had acceptable tolerability with 2 subjects discontinuing because of treatment related adverse events out of the 26 subjects who entered the maintenance period. Stage B of the study is on-going and includes the concomitant use of an anti-emetic to reduce cholinergic adverse events observed in the study.

•A Phase 2b randomized, double-blind, placebo-controlled study in patients with treatment resistant focal seizures is expected to start by the end of 2024 studying 3mg and 4mg twice daily doses.

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SPN-443 – Novel stimulant for ADHD/CNS

•The Company initiated a Phase 1 single dose study in healthy adults in the third quarter of 2024. The primary objective of the study is to assess safety and tolerability.

Critical Accounting Policies and the Use of Estimates

A summary of our significant accounting policies is included in Note 2, Summary of Significant Accounting Policies of our audited consolidated financial statements included in the Annual Report on Form 10-K for the year ended December 31, 2023. There were no significant changes to the disclosures with respect to our critical accounting policies in our Annual Report on Form 10-K for the year ended December 31, 2023.

Results of Operations

Comparison of the Three and Nine Months ended September 30, 2024 and 2023

Revenues

Revenues consist primarily of net product sales of our commercial products in the U.S., supplemented by royalty and licensing revenues from our collaborative licensing arrangements. The following table provides information regarding our revenues during the three and nine months ended September 30, 2024 (dollars in thousands):


	Three Months Ended September 30,				Change			Nine Months Ended September 30,				Change
	2024		2023		Amount		Percent	2024		2023		Amount		Percent
Net product sales
Qelbree	$	62,359	$	37,081	$	25,278	68%	$	166,857	$	93,840	$	73,017	78%
GOCOVRI	35,657		32,889		2,768		8%	93,922		87,650		6,272		7%
Oxtellar XR	29,805		29,644		161		1%	86,265		82,359		3,906		5%
APOKYN	19,867		21,510		(1,643)		(8)%	53,811		56,324		(2,513)		(4)%
Trokendi XR	15,318		20,625		(5,307)		(26)%	48,393		74,734		(26,341)		(35)%
Other(1)	7,296		7,255		41		—%	22,053		23,008		(955)		(4)%
Total net product sales	170,302		149,004		21,298		14%	471,301		417,915		53,386		13%
Royalty, licensing and other revenues	5,387		4,876		511		10%	16,357		25,292		(8,935)		(35)%
Total revenues	$	175,689	$	153,880	$	21,809	14%	$	487,658	$	443,207	$	44,451	10%

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(1) Includes net product sales of MYOBLOC, XADAGO and Osmolex ER.

Net Product Sales

Net product sales were $170.3 million and $149.0 million for the three months ended September 30, 2024 and 2023, respectively. The increase was primarily due to increases in net product sales from Qelbree and GOCOVRI partially offset by the decline in net product sales of Trokendi XR due to generic erosion.

Net product sales were $471.3 million and $417.9 million for the nine months ended September 30, 2024 and 2023, respectively. The increase was primarily due to increases in net product sales from Qelbree and GOCOVRI, partially offset by the decline in net product sales of Trokendi XR due to generic erosion.

Sales Deductions and Related Accruals

We record accrued product returns and accrued product rebates as current liabilities in Accrued product returns and rebates, on our condensed consolidated balance sheets. We record sales discounts as a reduction against Accounts receivable, net on the unaudited condensed consolidated balance sheets. Both amounts are generally affected by changes in gross product sales, changes in the provision for net product sales deductions, and the timing of payments/credits.

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The following table provides a summary of activity with respect to accrued product returns and rebates during the periods indicated (dollars in thousands):


	Accrued Product Returns and Rebates
	Product Returns		Product Rebates		Sales Discounts		Total
Balance at December 31, 2023	$	57,290	$	96,984	$	10,719	$	164,993
Provision
Provision for current year sales	15,615		295,831		52,372		363,818
Adjustments relating to prior year sales	(7,345)		(2,244)		(6)		(9,595)
Total provision	8,270		293,587		52,366		354,223
Less: Actual payments/credits	(8,131)		(278,876)		(52,097)		(339,104)
Balance at September 30, 2024	$	57,429	$	111,695	$	10,988	$	180,112


	Accrued Product Returns and Rebates
	Product Returns		Product Rebates		Sales Discounts		Total
Balance at December 31, 2022	$	45,008	$	106,657	$	12,995	$	164,660
Provision
Provision for current year sales	17,484		310,166		48,766		376,416
Adjustments relating to prior year sales	(52)		1,657		32		1,637
Total provision	17,432		311,823		48,798		378,053
Less: Actual payments/credits	(8,096)		(310,351)		(50,960)		(369,407)
Balance at September 30, 2023	$	54,344	$	108,129	$	10,833	$	173,306

Accrued Product Returns and Rebates

The accrued product returns balance increased to $57.4 million as of September 30, 2024 from $54.3 million as of September 30, 2023. This increase was primarily due to higher net product sales and timing of related return activity offset by the $7.3 million adjustment in the estimated provision for product returns related to prior year sales. The majority of this adjustment is attributable to Qelbree, reflecting favorable actual returns experienced in 2024 for Qelbree. As a result, the Company changed its estimated provision for product returns based on the most recent experience.

The accrued product rebates balance increased to $111.7 million as of September 30, 2024 from $108.1 million as of September 30, 2023 due to timing of payments associated with government programs.

Provision for Product Returns and Rebates

The provision for product returns decreased to $8.3 million for the nine months ended September 30, 2024 from $17.4 million for the nine months ended September 30, 2023. The decrease was primarily due to the aforementioned $7.3 million adjustment in the estimated provision for product returns related to prior year sales.

The provision for product rebates decreased to $293.6 million for nine months ended September 30, 2024 from $311.8 million for the nine months ended September 30, 2023. The decrease was primarily attributable to lower Trokendi XR sales, partially offset by higher Qelbree sales and favorability in commercial programs.

Royalty, Licensing and Other Revenues

Royalty, licensing and other revenues were $5.4 million and $4.9 million for the three months ended September 30, 2024 and 2023, respectively. The increase was due to increase in royalty revenues from royalty arrangements with third parties.

Royalty, licensing and other revenues were $16.4 million and $25.3 million for the nine months ended September 30, 2024 and 2023, respectively. The decrease was primarily due to lower royalties on generic Trokendi XR due to the increased number of generic entrants.

Cost of Goods Sold

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Cost of goods sold was $17.6 million and $19.6 million for the three months ended September 30, 2024 and 2023, respectively. Cost of goods sold was $51.8 million and $64.2 million for the nine months ended September 30, 2024 and 2023, respectively. The decrease in both periods was primarily driven by manufacturing efficiencies of Qelbree and a decline in net product sales of Trokendi XR due to generic erosion.

Research and Development Expenses

R&D expenses were $29.0 million and $22.7 million for the three months ended September 30, 2024 and 2023, respectively. R&D expenses were $80.1 million and $68.2 million for the nine months ended September 30, 2024 and 2023, respectively. The increase in both periods was primarily due to increased clinical program costs on SPN-817, SPN-820 and on the open-label study of Qelbree, and increased manufacturing costs of our product candidates.

Selling, General and Administrative Expenses

The following table provides information regarding our selling, general and administrative (SG&A) expenses during the periods indicated (dollars in thousands):


	Three Months Ended September 30,				Change			Nine Months Ended September 30,				Change
	2024		2023		Amount		Percent	2024		2023		Amount		Percent
Selling and marketing	$	54,329	$	56,785	$	(2,456)	(4)%	$	172,700	$	173,909	$	(1,209)	(1)%
General and administrative	15,424		25,915		(10,491)		(40)%	69,473		81,170		(11,697)		(14)%
Total	$	69,753	$	82,700	$	(12,947)	(16)%	$	242,173	$	255,079	$	(12,906)	(5)%

During the three and nine months ended September 30, 2024, the Company recorded $11.5 million and $12.0 million of insurance recoveries for certain legal costs, respectively. Legal costs were recorded under general and administrative expense as incurred. Correspondingly, the insurance recoveries were recorded as a reduction to general and administrative expenses. There were no insurance recoveries recorded in 2023.

Amortization of Intangible Assets

Amortization of intangible assets was $19.5 million and $21.2 million for the three months ended September 30, 2024 and 2023, respectively. Amortization of intangible assets was $59.7 million and $61.3 million for the nine months ended September 30, 2024 and 2023, respectively. The decrease is primarily due to impairment charges on certain acquired intangible assets in the fourth quarter of 2023 which reduced amortization expense in fiscal year 2024.

Contingent Consideration Gain

Contingent consideration was a gain of $1.0 million and a gain of $0.5 million for the three months ended September 30, 2024 and 2023, respectively. Contingent consideration was a gain of $6.5 million and a gain of $1.3 million for the nine months ended September 30, 2024 and 2023, respectively. The change for both periods was primarily driven by the passage of time for the sales-based milestones associated with the Adamas Acquisition and change in the estimated timeline of achievement of the regulatory and development milestones associated with the USWM Acquisition. See Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations-Operational Highlights-Product Pipeline Update-SPN-830 (apomorphine infusion device) for treatment of Parkinson's disease (PD).

Other Income (Expense)

Other income (expense) was an income of $4.1 million and $1.8 million for the three months ended September 30, 2024 and 2023, respectively. Other income (expense) was an income of $11.2 million and $6.1 million for the nine months ended September 30, 2024 and 2023, respectively. The increase in both periods was due to higher interest income on marketable securities largely driven by an overall higher investment balance in 2024 and no debt outstanding in 2024. The interest expense recognized in 2023 was related to the 2023 Notes which were paid off in April 2023.

Income Tax Expense

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Financial Condition, Liquidity and Capital Resources

Cash and Cash Equivalents and Marketable Securities

Cash and cash equivalents, marketable securities, and long-term marketable securities are comprised of the following (dollars in thousands):


	September 30		December 31		Change
	2024		2023		Amount		Percent
Cash and cash equivalents	$	31,673	$	75,054	$	(43,381)	(58)%
Marketable securities	371,537		179,820		191,717		107%
Long-term marketable securities	—		16,617		(16,617)		(100)%
Total	$	403,210	$	271,491	$	131,719	49%

We have financed our operations primarily with cash generated from product sales, supplemented by revenues from royalty and licensing arrangements, as well as proceeds from the sale of equity and debt securities. Continued cash generation is highly dependent on the success of our commercial products, as well as the success of our product candidates if approved by the FDA. While we expect continued profitability in future years, we anticipate there may be significant variability from year to year in the level of our profits particularly due to the following: continued market and payor pressures for our commercial products; the unfavorable impact of the loss of patent exclusivity for Trokendi XR in January 2023; the potential unfavorable impact of the loss of exclusivity of Oxtellar XR and XADAGO; funding for research and development of our product candidates; and the additional funding to launch SPN-830, if approved by the FDA.

The Company believes its balances of cash, cash equivalents, and unrestricted marketable securities, which totaled $403.2 million as of September 30, 2024, along with cash generated from ongoing operations and continued access to debt markets, will be sufficient to satisfy its cash requirements over the next 12 months and beyond.

We may, from time to time, consider raising additional capital through: new collaborative arrangements; strategic alliances; additional equity and/or financings from debt or other sources, especially in conjunction with opportunistic business development initiatives. We will continue to actively manage our capital structure and to consider all financing opportunities that could strengthen our long-term financial profile. Any such capital raises may or may not be similar to transactions in which we have engaged in the past. There can be no assurance that any such financing opportunities will be available on acceptable terms, if at all.

Cash Flows

Cash flows are comprised of the following (dollars in thousands):

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	Nine Months Ended September 30,				Change
	2024		2023		Amount
Net cash provided by (used in):
Operating activities	$	127,545	$	66,127	$	61,418
Investing activities	(177,229)		334,710		(511,939)
Financing activities	6,303		(398,972)		405,275
Net change in cash and cash equivalents	(43,381)		1,865		(45,246)
Cash and cash equivalents at beginning of year	75,054		93,120		(18,066)
Cash and cash equivalents at end of period	$	31,673	$	94,985	$	(63,312)

Operating Activities

Net cash provided by operating activities was $127.5 million and $66.1 million for the nine months ended September 30, 2024, and 2023, respectively. The increase in cash flows provided by operating activities is primarily due to higher net income for the nine months ended September 30, 2024 compared to the same period in prior year, and changes in working capital which reflects the timing impacts of cash collections on receivables and settlement of payables.

Investing Activities

Net cash used in investing activities was $177.2 million for the nine months ended September 30, 2024 compared to $334.7 million cash provided by investing activities during the same period in 2023. The change was primarily due to an increase in cash outflows from purchases of marketable securities, partially offset by higher cash inflows from the maturities of marketable securities.

Financing Activities

Net cash provided by financing activities was $6.3 million for the nine months ended September 30, 2024 compared to $399.0 million used during the same period in 2023. The change was primarily due to the payment of the total principal amounts and remaining outstanding interest due on the 0.625% Convertible Senior Notes in April 2023.

Material Cash Requirements

Refer to “Part II, Item 7 — Management’s Discussion and Analysis of Liquidity and Capital Resources” of our Annual Report on Form 10-K for the year ended December 31, 2023, and Note 14, Commitments and Contingencies, in the Notes to the Condensed Consolidated Financial Statements in Part I, Item 1, Unaudited Condensed Consolidated Financial Statements, of this Quarterly Report on Form 10-Q for the discussion of our contractual obligations.

Recently Issued Accounting Pronouncements

For a discussion of new accounting pronouncements, see Note 2 Summary of Significant Accounting Policies, in the Notes to the Condensed Consolidated Financial Statements in Part I, Item 1, Unaudited Condensed Consolidated Financial Statements, of this Quarterly Report on Form 10-Q.

Item 3. Quantitative and Qualitative Disclosures About Market Risk

The primary objective of our investment activities is to preserve our capital to fund operations and to facilitate business development activities. We also seek to maximize income from our investments without assuming significant interest rate risk, liquidity risk, or risk of default by investing in investment grade securities with maturities of four years or less. Our exposure to market risk is confined to investments in cash and cash equivalents, marketable securities, and long-term marketable securities. As of September 30, 2024, we had cash and cash equivalents, marketable securities, and long-term marketable securities of $403.2 million.

The Company has a credit line agreement with UBS (the Credit Line) which provides a revolving line of credit of up to $150 million and can be drawn at any time. As of September 30, 2024, there was no outstanding debt under the Credit Line. In the future, we may borrow funds under the Credit Line. Variable rate borrowing, which may occur under the Credit Line, exposes us to interest rate risk as increases in interest rates would increase our borrowing costs.

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Any borrowed funds pursuant to our Credit Line are subject to a collateral maintenance requirement. The Credit Line is secured primarily by our portfolio of marketable securities, which is primarily comprised of corporate and U.S. government agency and municipal debt securities and may fluctuate in value. The fluctuations may be driven by, among other things, changes in interest rates, economic conditions, and other financial conditions as well as idiosyncratic factors related to a security’s issuer. To the extent a fluctuation in value results in the value of the collateral decreasing below the required collateral maintenance requirements we may be required to promptly post additional collateral. Additionally, our Credit Line is an uncommitted facility that may be terminated by the lender at any time. During periods of rapidly changing interest rates, economic conditions or other financial conditions, the Credit Line may be terminated by the lender and/or the lender may declare that all borrowings thereunder are immediately due.

Our cash and cash equivalents consist primarily of cash held at banks and investments in highly liquid financial instruments with an original maturity of three months or less. Our marketable securities, which are reported at fair value, consist of investments in U.S. Treasury bills and notes; bank certificates of deposit; various U.S. governmental agency debt securities; and corporate and municipal debt securities. We place all investments with governmental, industrial, or financial institutions whose debt is rated as investment grade. We generally hold these securities to maturities of one to four years. Because of the relatively short period that we hold our investments and because we generally hold these securities to maturity, we do not believe that an increase in interest rates would have any significant impact on the realizable value of our investments.

We do not have any currency or derivative financial instruments.

We may contract with clinical research organizations (CROs) and investigational sites globally. Currently, we have ongoing clinical trials being conducted outside the U.S. We do not hedge our foreign currency exchange rate risk. Transactions denominated in currencies other than the U.S. dollar are recorded based on exchange rates at the time such transactions arise. As of September 30, 2024 and December 31, 2023, substantially all of our liabilities were denominated in the U.S. dollar.

Inflation generally affects us by increasing our cost of labor and the cost of services provided by our vendors. We do not believe that inflation and changing prices over the year ended December 31, 2023, and the nine months ended September 30, 2024 had a significant impact on our consolidated results of operations.

Item 4. Controls and Procedures

Evaluation of Disclosure Controls and Procedures

We maintain disclosure controls and procedures required by Rule 13a-15(e) and 15d-15(e) of the Securities Exchange Act of 1934, as amended, or the Exchange Act. Our disclosure controls and procedures are designed to provide reasonable assurance that the information required to be disclosed by us in the reports we file or submit under the Exchange Act has been appropriately recorded, processed, summarized, and reported within the time periods specified in the Securities and Exchange Commission's rules and forms and that such information is accumulated and communicated to our management, including our CEO and CFO, to allow timely decisions regarding required disclosure. We conducted an evaluation of the effectiveness of the design and operation of our disclosure controls and procedures as of September 30, 2024, the end of the period covered by this report. Based on that evaluation, under the supervision and with the participation of our management, including our CEO and CFO, we concluded that our disclosure controls and procedures are effective as of September 30, 2024.

Changes in Internal Control over Financial Reporting

Our management, including our CEO and CFO, evaluated changes in our internal control over financial reporting that occurred during the quarter ended September 30, 2024.

During the quarter ended September 30, 2024, no changes occurred in our internal control over financial reporting that materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

PART II — OTHER INFORMATION

Item 1. Legal Proceedings

From time to time and in the ordinary course of business, Supernus Pharmaceuticals, Inc. (the "Company") and any of its subsidiaries may be subject to various claims, charges and litigation. The Company and any of its subsidiaries may be required to file infringement claims against third parties for the infringement of our patents.

Oxtellar XR®

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I. Supernus Pharmaceuticals, Inc. v. Ajanta Pharma Limited, C.A. No. 22-cv-1431 (GBW) (D. Del.)

The Company received a Paragraph IV Notice Letter from generic drug maker Ajanta Pharma Limited (“Ajanta”) dated September 19, 2022, directed to ten of its Oxtellar XR® Orange Book patents. Supernus’s U.S. Patent Nos. 7,722,898; 7,910,131; 8,617,600; 8,821,930; 9,119,791; 9,351,975; 9,370,525; 9,855,278; 10,220,042; and 11,166,960 generally cover once-a-day oxcarbazepine formulations and methods of treating seizures using those formulations. The FDA Orange Book lists all ten of the Company’s Oxtellar XR® patents as expiring on April 13, 2027. On October 28, 2022, the Company filed a lawsuit against Ajanta alleging infringement of the Company’s ten Oxtellar XR® patents. The Complaint—filed in the U.S. District Court for the District of Delaware—alleges, among other things, that Ajanta infringed the Company’s Oxtellar XR® patents by submitting to the FDA an Abbreviated New Drug Application (“ANDA”) seeking to market a generic version of Oxtellar XR® prior to the expiration of the Company’s patents. Filing its October 28, 2022 Complaint within 45 days of receiving Ajanta’s Paragraph IV certification notice entitles Supernus to an automatic stay preventing the FDA from approving Ajanta’s ANDA for 30 months from the date of the Company’s receipt of the Paragraph IV Notice Letter. On January 3, 2023, Ajanta answered the Complaint and denied the substantive allegations of the Complaint, asserting affirmative defenses that include non-infringement and invalidity. Ajanta also asserted Counterclaims seeking declaratory judgments of non-infringement and invalidity. On January 24, 2023, the Company filed its Reply, denying the substantive allegations of Ajanta’s Counterclaims. The Court issued a Scheduling Order on July 13, 2023, that set a trial date of February 10, 2025. The Company entered into a settlement agreement with Ajanta, and on January 18, 2024, a stipulation of dismissal without prejudice was entered by the U.S. District Court for the District of Delaware. The agreement has been submitted to the applicable governmental agencies.

II. Supernus Pharmaceuticals, Inc. v. Aurobindo Pharma Ltd. and Aurobindo Pharma USA, Inc., C.A. No. 24-cv-9380 (KMW) (MJS) (D.N.J)

The Company received a Paragraph IV Notice Letter from generic drug maker Aurobindo Pharma Ltd. dated August 9, 2024, directed to eleven of its Oxtellar XR® Orange Book patents. Supernus’s U.S. Patent Nos. 7,722,898; 7,910,131; 8,617,600; 8,821,930; 9,119,791; 9,351,975; 9,370,525; 9,855,278; 10,220,042; 11,166,960; and 11,896,599 generally cover once-a-day oxcarbazepine formulations and methods of treating seizures using those formulations. The FDA Orange Book lists all eleven of the Company’s Oxtellar XR® patents as expiring on April 13, 2027. On September 23, 2024, the Company filed a lawsuit against Aurobindo Pharma Ltd. and Aurobindo Pharma USA, Inc. (collectively, “Aurobindo”) alleging infringement of the Company’s eleven Oxtellar XR® patents. The Complaint—filed in the U.S. District Court for the District of New Jersey—alleges, among other things, that Aurobindo infringed the Company’s Oxtellar XR® patents by submitting to the FDA an Abbreviated New Drug Application (“ANDA”) seeking to market a generic version of Oxtellar XR® prior to the expiration of the Company’s patents. Filing its September 23, 2024, Complaint within 45 days of receiving Aurobindo’s Paragraph IV certification notice entitles Supernus to an automatic stay preventing the FDA from approving Aurobindo’s ANDA for 30 months from the date of the Company’s receipt of the Paragraph IV Notice Letter. As of the date of this submission, the Court has not issued a Scheduling Order.

Trokendi XR®

III. Supernus Pharmaceuticals, Inc. v. Ajanta Pharma Limited, et al., C.A. No. 21-cv-6964 (GC)(DEA) (D.N.J.)

The Company received a Paragraph IV Notice Letter from generic drug maker Ajanta Pharma Limited dated February 10, 2021, directed to ten of its Trokendi XR® Orange Book patents. Supernus’s U.S. Patent Nos. 8,298,576; 8,298,580; 8,663,683; 8,877,248; 8,889,191; 8,992,989; 9,549,940; 9,555,004; 9,622,983; and 10,314,790 generally cover once-a-day topiramate formulations and methods of treating or preventing seizures and migraines using those formulations. The FDA Orange Book currently lists United States Patent No. 8,298,576 as expiring on April 4, 2028, and United States Patent Nos. 8,298,580; 8,663,683; 8,877,248; 8,889,191; 8,992,989; 9,549,940; 9,555,004; 9,622,983; and 10,314,790 as expiring on November 16, 2027. On March 26, 2021, the Company filed a lawsuit against Ajanta Pharma Limited and Ajanta Pharma USA Inc. (collectively “Ajanta”) alleging infringement of the Company’s Trokendi XR® Orange Book patents. The Complaint—filed in the U.S. District Court for the District of New Jersey—alleges, among other things, that Ajanta infringed the Company’s Trokendi XR® patents by submitting to the FDA an Abbreviated New Drug Application (“ANDA”) seeking to market a generic version of Trokendi XR® prior to the expiration of the Company’s patents. Filing its March 26, 2021 Complaint within 45 days of receiving Ajanta’s Paragraph IV certification notice entitles Supernus to an automatic stay preventing the FDA from approving Ajanta’s ANDA for 30 months from the date of the Company’s receipt of the Paragraph IV Notice Letter. On June 7, 2021, Ajanta answered the Complaint and denied the substantive allegations of the Complaint, asserting affirmative defenses that include non-infringement and invalidity. Ajanta also asserted Counterclaims seeking declaratory judgments of non‑infringement and invalidity for the Trokendi XR® Orange Book patents. On June 28, 2021, the Company filed its reply, denying the substantive allegations of Ajanta’s Counterclaims. Following the initial Rule 16 Scheduling Conference, the Court issued a case schedule. On December 17, 2021, the Court issued an order consolidating this lawsuit with the lawsuit against Torrent, discussed in Section

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IV, below. The consolidation order extended the 30‑month stay preventing the FDA from approving Ajanta’s ANDA to December 16, 2023. The Company entered into a settlement agreement with Ajanta, and on April 4, 2023, a stipulation of dismissal without prejudice was entered by the U.S. District Court for the District of New Jersey. The agreement has been submitted to the applicable governmental agencies.

IV. Supernus Pharmaceuticals, Inc. v. Torrent Pharmaceuticals Ltd., et al., C.A. No. 21-cv-14268 (GC)(DEA) (D.N.J.)

The Company received a Paragraph IV Notice Letter from generic drug maker Torrent Pharmaceuticals Ltd. dated June 15, 2021, directed to ten of its Trokendi XR® Orange Book patents. Supernus’s U.S. Patent Nos. 8,298,576; 8,298,580; 8,663,683; 8,877,248; 8,889,191; 8,992,989; 9,549,940; 9,555,004; 9,622,983; and 10,314,790 generally cover once-a-day topiramate formulations and methods of treating or preventing seizures and migraines using those formulations. The FDA Orange Book currently lists United States Patent No. 8,298,576 as expiring on April 4, 2028, and United States Patent Nos. 8,298,580; 8,663,683; 8,877,248; 8,889,191; 8,992,989; 9,549,940; 9,555,004; 9,622,983; and 10,314,790 as expiring on November 16, 2027. On July 28, 2021, the Company filed a lawsuit against Torrent Pharmaceuticals Ltd. and Torrent Pharma Inc. (collectively, “Torrent”) alleging infringement of the Company’s Trokendi XR® Orange Book patents. The Complaint—filed in the U.S. District Court for the District of New Jersey—alleges, among other things, that Torrent infringed the Company’s Trokendi XR® patents by submitting to the FDA an Abbreviated New Drug Application (“ANDA”) seeking to market a generic version of Trokendi XR® prior to the expiration of the Company’s patents. Filing its July 28, 2021 Complaint within 45 days of receiving Torrent’s Paragraph IV certification notice entitles Supernus to an automatic stay preventing the FDA from approving Torrent’s ANDA for 30 months from the date of the Company’s receipt of the Paragraph IV Notice Letter. On September 29, 2021, Torrent answered the Complaint and denied the substantive allegations of the Complaint, asserting affirmative defenses that include non-infringement and invalidity. Torrent also asserted Counterclaims seeking declaratory judgments of non‑infringement for the Trokendi XR® Orange Book patents. On November 3, 2021, the Company filed its reply, denying the substantive allegations of Torrent’s Counterclaims. Following the initial Rule 16 Scheduling Conference, the Court issued a case schedule. On December 17, 2021, the Court issued an order consolidating this lawsuit with the lawsuit against Ajanta, discussed in Section III, above. The Court held a bench trial between July 31, 2023, and August 3, 2023. Closing arguments for the trial were held on October 4, 2023. On December 12, 2023, the Court issued an Order enjoining Torrent from launching its generic drug product through January 31, 2024, or until the Court’s trial decision issues, whichever is sooner. On January 30, 2024, the Court issued a Trial Opinion and Order, deciding in Supernus’s favor that the patent claims that Supernus asserted at trial against Torrent are both valid and infringed. The District Court entered a Final Judgment in Supernus’s favor on February 22, 2024.

On March 4, 2024, Torrent filed a Notice of Appeal of the Final Judgment with the U.S. Court of Appeals for the Federal Circuit. The Federal Circuit docketed the appeal as Supernus Pharmaceuticals, Inc. v. Ajanta Pharma Limited because the lawsuit against Torrent was previously consolidated with the lawsuit against Ajanta (see Section III above). Briefing is ongoing as of the date of this filing. The Court has not set the date for oral argument.

V. Supernus Pharmaceuticals, Inc. v. Ascent Pharmaceuticals Inc., et al., C.A. No. 23-cv-4015 (GC)(DEA) (D.N.J.)

The Company received a Paragraph IV Notice Letter from generic drug maker Ascent Pharmaceuticals Inc. dated June 15, 2023, directed to ten of its Trokendi XR® Orange Book patents. Supernus’s U.S. Patent Nos. 8,298,576; 8,298,580; 8,663,683; 8,877,248; 8,889,191; 8,992,989; 9,549,940; 9,555,004; 9,622,983; and 10,314,790 generally cover once-a-day topiramate formulations and methods of treating or preventing seizures and migraines using those formulations. The FDA Orange Book currently lists United States Patent No. 8,298,576 as expiring on April 4, 2028, and United States Patent Nos. 8,298,580; 8,663,683; 8,877,248; 8,889,191; 8,992,989; 9,549,940; 9,555,004; 9,622,983; and 10,314,790 as expiring on November 16, 2027. On July 26, 2023, the Company filed a lawsuit against Ascent Pharmaceuticals Inc., ("Ascent Pharma") Camber Pharmaceuticals, Inc., and Hetero Labs Ltd. (collectively, “Ascent”) alleging infringement of the Company’s Trokendi XR® Orange Book patents. The Complaint—filed in the U.S. District Court for the District of New Jersey—alleges, among other things, that Ascent infringed the Company’s Trokendi XR® patents by submitting to the FDA an Abbreviated New Drug Application (“ANDA”) seeking to market a generic version of Trokendi XR® prior to the expiration of the Company’s patents. Filing its July 26, 2023 Complaint within 45 days of receiving Ascent’s Paragraph IV certification notice entitles Supernus to an automatic stay preventing the FDA from approving Ascent’s ANDA for 30 months from the date of the Company’s receipt of the Paragraph IV Notice Letter. On September 28, 2023, the Court entered a stipulation of dismissal without prejudice as to only defendants Camber and Hetero, which included stipulations that, among other things: (i) Ascent Pharma will not contest personal jurisdiction or venue in this District for this Action; (ii) Camber and Hetero will be bound by any injunction in this Action to the extent it concerns the Ascent ANDA; and (iii) Ascent Pharma will collect and produce any relevant discovery that is in the possession, custody, or control of Camber and Hetero. On October 11, 2023, Ascent Pharma answered the Complaint and denied the substantive allegations of the Complaint, asserting affirmative defenses that include non-infringement and invalidity. The Company entered into a settlement agreement with Ascent Pharma, and on May 2, 2024, a stipulation of dismissal without

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prejudice was entered by the U.S. District Court for the District of New Jersey. The agreement has been submitted to the applicable governmental agencies.

VI. Supernus Pharmaceuticals, Inc. v. Micro Labs Ltd., et al., C.A. No. 24-cv-9338 (ZNQ)(JTQ) (D.N.J.)

The Company received a Paragraph IV Notice Letter from generic drug maker Micro Labs Ltd. dated August 13, 2024, directed to ten of its Trokendi XR® Orange Book patents. Supernus’s U.S. Patent Nos. 8,298,576; 8,298,580; 8,663,683; 8,877,248; 8,889,191; 8,992,989; 9,549,940; 9,555,004; 9,622,983; and 10,314,790 generally cover once-a-day topiramate formulations and methods of treating or preventing seizures and migraines using those formulations. The FDA Orange Book currently lists U.S. Patent No. 8,298,576 as expiring on April 4, 2028, and U.S. Patent Nos. 8,298,580; 8,663,683; 8,877,248; 8,889,191; 8,992,989; 9,549,940; 9,555,004; 9,622,983; and 10,314,790 as expiring on November 16, 2027. On September 20, 2024, the Company filed a lawsuit against Micro Labs Ltd. and Micro Labs USA, Inc. (collectively, “Micro Labs”) alleging infringement of the Company’s Trokendi XR® Orange Book patents. The Complaint—filed in the U.S. District Court for the District of New Jersey—alleges, among other things, that Micro Labs infringed the Company’s Trokendi XR® patents by submitting to the FDA an Abbreviated New Drug Application (“ANDA”) seeking to market a generic version of Trokendi XR® prior to the expiration of the Company’s patents. Filing its September 20, 2024, Complaint within 45 days of receiving Micro Labs’ Paragraph IV certification notice entitles Supernus to an automatic stay preventing the FDA from approving Micro Labs’ ANDA for 30 months from the date of the Company’s receipt of the Paragraph IV Notice Letter. As of the date of this submission, the Court has not issued a Scheduling Order.

APOKYN®

VII. Sage Chemical, Inc., et al. v. Supernus Pharmaceuticals, Inc., et al., C.A. No. 22-cv-1302 (CJB) (D. Del.)

On October 3, 2022, Sage Chemical, Inc. and TruPharma, LLC filed a lawsuit in the United States District Court for the District of Delaware alleging that Supernus Pharmaceuticals, Inc., Britannia Pharmaceuticals Limited (“Britannia”), and US WorldMeds Partners, LLC (“US WorldMeds”) violated state and federal antitrust law in connection with APOKYN® (apomorphine HCl). On October 16, 2022, Plaintiffs amended their complaint to add additional defendants MDD US Enterprises, LLC, MDD US Operations, LLC (each a subsidiary of Supernus Pharmaceuticals, Inc.), USWM, LLC (“USWM”), and individual defendants Paul Breckinridge Jones, Sr., Herbert Lee Warren, Jr., Henry Van Den Berg, and Kristin L. Gullo. On January 10, 2023, Defendants filed an Omnibus Motion to Dismiss the Amended Complaint seeking dismissal of each of Plaintiffs’ claims and the lawsuit in its entirety and US WorldMeds with USWM, Britannia, and the group of individual defendants each filed separate motions to dismiss. On May 9, 2024, and May 28, 2024, respectively, the Court denied the Defendants’ omnibus motion and the Britannia motion to dismiss. On May 31, 2024, and June 4, 2024, respectively, the Court granted the individuals defendants’ motion to dismiss and the US WorldMeds and USWM motion to dismiss. On June 18, 2024, the Court issued a scheduling order that provides for a Pretrial Conference on September 12, 2025, and a jury trial beginning on September 22, 2025. Pretrial discovery is ongoing as of the date of this filing.

Adamas Litigation

In November 2012, Adamas Pharmaceuticals, Inc. (Adamas) granted Forest Laboratories Holdings Limited, an indirect wholly-owned subsidiary of Allergan plc (Forest), an exclusive license to certain of Adamas's intellectual property rights relating to human therapeutics containing memantine in the United States. Under the terms of that license agreement, Forest has the right to enforce such intellectual property rights which are related to its right to market and sell Namzaric and NAMENDA XR for the treatment of moderate to severe dementia related to Alzheimer's disease. Adamas has a right to participate in, but not control, such enforcement actions by Forest.

Since 2018 multiple generic companies have launched generic versions of NAMENDA XR. A number of companies have submitted ANDAs including one or more certifications to the FDA, pursuant to 21 U.S.C. § 355(j)(2)(A)(vii)(iv), requesting approval to manufacture and market generic versions of Namzaric, on which Adamas became entitled to receive royalties from Forest beginning in May 2020.

Adamas and Forest have settled with all such Namzaric ANDA filers, including all first filers on all the available dosage forms of Namzaric. Subject to those agreements, the earliest date on which any of these agreements grant a license to market a Namzaric ANDA filer's generic version of Namzaric is January 1, 2025 (or earlier in certain circumstances). Alternatively, the Namzaric ANDA filers with the earliest date have the option to launch an authorized generic version of Namzaric beginning on January 1, 2026 instead of launching their own generic version of Namzaric on January 1, 2025. Adamas and Forest intend to continue to enforce the patents associated with Namzaric.

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On April 1, 2019, Adamas was served with a complaint filed in the United States District Court for the Northern District of California (Case No. 3:18-cv-03018-JCS) against it and several Forest and Allergan entities alleging violations of federal and state false claims acts (FCA) in connection with the commercialization of NAMENDA XR and Namzaric by Allergan. The lawsuit is a qui tam complaint brought by a named individual, Zachary Silbersher, asserting rights of the Federal government and various state governments. The lawsuit was originally filed in May 2018 under seal, and Adamas became aware of the lawsuit when it was served. The complaint alleges that patents held by Allergan and Adamas covering NAMENDA XR and Namzaric were procured through fraud on the United States Patent and Trademark Office and that these patents were asserted against potential generic manufacturers of NAMENDA XR and Namzaric to prevent the generic manufacturers from entering the market, thereby wrongfully excluding generic competition resulting in artificially high prices being charged to government payors.

Adamas's patents in question were licensed exclusively to Forest. The complaint includes a claim for damages of “potentially more than $2.5 billion dollars,” treble damages and statutory penalties. To date the federal and state governments have declined to intervene in this action. This case is currently stayed pending Adamas's and Allergan's interlocutory appeal of the District Court's December 11, 2020 order denying Adamas's and Allergan's motions to dismiss the complaint. The appeal was heard by the United States Court of Appeals for the Ninth Circuit (Case No. 21-80005). Argument was held on January 10, 2022. On August 25, 2022, the Ninth Circuit sided with the defendants by reversing the District Court’s public disclosure bar rulings and remanding the case back to the District Court to decide certain issues in the first instance. On October 11, 2022, the plaintiff filed a petition for rehearing with the Ninth Circuit, which was denied. On December 23, 2022, defendants filed renewed motions to dismiss directed to the remaining unresolved issue. On March 20, 2023, the District Court entered an order and final judgment dismissing with prejudice the FCA claim while declining to exercise supplemental jurisdiction over the state false claims act claims which were dismissed without prejudice. On April 19, 2023, the plaintiff appealed the District Court's dismissal of the Federal False Claims Act claim. On February 20, 2024, the plaintiff filed a motion for an indicative ruling and to set aside the judgment in the District Court, based on the same arguments raised in his appeal. That motion was fully briefed and the District Court determined that the motion for an indicative ruling was suitable for determination without a hearing. On May 7, 2024, the District Court denied the plaintiff’s motion for an indicative ruling. The appeal is fully briefed, and the Ninth Circuit has set oral argument for November 21, 2024.

On December 10, 2019, a putative class action lawsuit alleging violations of the federal securities laws was filed by Ali Zaidi against Adamas and certain of Adamas's former directors and officers in federal court in the Northern District of California (Case No. 4:19-cv-08051). This lawsuit alleges violations of the Securities Exchange Act of 1934 by Adamas and certain of Adamas's former directors and officers. On October 8, 2021, the presiding judge dismissed the litigation, and granted Plaintiffs leave to amend their complaint. On November 5, 2021, Plaintiffs filed their second amended class action complaint. On December 10, 2021, Adamas filed a motion to dismiss the Second Amended Complaint. Plaintiffs opposed the motion to dismiss. On January 13, 2023, the Court granted in part and denied in part Defendants’ Motion to Dismiss. All claims against Adamas have been dismissed with prejudice, but claims against one of the individual defendants, who may have certain rights to indemnification, remain. On February 27, 2023, Plaintiffs advised the Court that Plaintiffs would proceed only on the remaining claim against one of the individual defendants. The individual defendant filed an answer denying the claim on April 28, 2023. On September 21, 2023, the parties reached an agreement in principle to settle the Zaidi litigation, subject to court approval. On October 31, 2023, the Court granted the parties' stipulation staying all proceedings and vacating all existing deadlines. On April 2, 2024, the Court preliminarily approved the settlement of the case, including a $4.7 million payment from insurers, subject to further consideration at a settlement hearing to be held in September 2024. On September 27, 2024, the Court granted final approval of the class action settlement, dismissed the lawsuit with prejudice, and final judgment was entered.

Adamas believes it has strong factual and legal defenses to all actions and intends to defend itself vigorously.

Item 1A. Risk Factors

Any investment in our business involves a high degree of risk. Before making an investment decision, you should carefully consider the information we include in this Quarterly Report on Form 10-Q, including our condensed consolidated financial statements and related notes; the additional information in the other reports we file with the Securities and Exchange Commission; and the risks described in our Annual Report on Form 10-K for the year ended December 31, 2023 and quarterly report on Form 10-Q for the period ended September 30, 2024. These risks may result in material harm to our business and our financial condition and results of operations. If a material, adverse event was to occur, the market price of our common stock may decline, and you could lose part or all of your investment.

Item 2. Unregistered Sales of Equity Securities and Use of Proceeds

(a) Sales of Unregistered Securities.

None.

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Item 3. Defaults Upon Senior Securities

None.

Item 4. Mine Safety Disclosures

None.

Item 5. Other Information

(a) None.

(b) None.

Name and Title of Director or Officer

Rule 10b5-1 Trading Arrangement(1)

Trading Arrangement Adopted or Terminated

Date of Adoption or Termination

Duration of Trading Arrangement

Aggregate Number of Securities to be Purchased Pursuant to Trading Arrangement

Aggregate Number of Securities to be Sold Pursuant to Trading Arrangement

Jack Khattar, President, Chief Executive Officer and Director

Yes

Terminated

August 12, 2024

First Transaction Date through August 12, 2024

—

75,037

Padmanabh Bhatt

SVP, Chief Scientific Officer, Intellectual Property

Yes

Adopted

September 3, 2024

First Transaction Date through March 31, 2025

131,995

131,995 (2)

____________________________________

(1) Indicates whether the trading arrangement is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c).

(2)This trading arrangement covers the exercise and sale of stock options, with a portion of such sales limited to an amount reasonably estimated such that the net proceeds from the sale are sufficient to cover the exercise cost and taxes associated with the exercise of the stock options.

Item 6. Exhibits

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The following exhibits are filed or furnished as part of this Quarterly Report on Form 10-Q:


Exhibit Number						Description
31.1						Certification of Chief Executive Officer pursuant to Rule 13a-14(a).

31.2						Certification of Chief Financial Officer pursuant to Rule 13a-14(a).

32.1						Certification of Chief Executive Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.

32.2						Certification of Chief Financial Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.

101						The following financial information from the Company’s Quarterly Report on Form 10-Q for the quarter ended September 30, 2024, formatted in Inline XBRL: (i) Cover Page, (ii) Condensed Consolidated Statements of Earnings (Loss), (iii) Condensed Consolidated Statements of Comprehensive Earnings (Loss), (iv) Condensed Consolidated Balance Sheets, (v) Condensed Consolidated Statements of Changes in Stockholders' Equity, (vi) Condensed Consolidated Statements of Cash Flows, and (vii) the Notes to Condensed Consolidated Financial Statements, tagged in summary and detail.

104						The cover page of the Company’s Quarterly Report on Form 10-Q for the quarter ended September 30, 2024, formatted in Inline XBRL (included with the Exhibit 101 attachments).

_______________________________________________________________________________

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SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.


	SUPERNUS PHARMACEUTICALS, INC.

DATED: November 4, 2024	By:	/s/ Jack A. Khattar
		Jack A. Khattar President and Chief Executive Officer

DATED: November 4, 2024	By:	/s/ Timothy C. Dec
		Timothy C. Dec Senior Vice-President and Chief Financial Officer

EXHIBIT 31.1

CERTIFICATION

I, Jack A. Khattar, certify that:

1.I have reviewed this Quarterly Report on Form 10-Q of Supernus Pharmaceuticals, Inc.;

2.Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a)designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b)designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c)evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d)disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5.The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a)all significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b)any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.


Date: November 4, 2024	By:	/s/ Jack A. Khattar
		Jack A. Khattar President and Chief Executive Officer

EXHIBIT 31.2

CERTIFICATION

I, Timothy C. Dec, certify that:

1.I have reviewed this Quarterly Report on Form 10-Q of Supernus Pharmaceuticals, Inc.;

(b)any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.


Date: November 4, 2024	By:	/s/ Timothy C. Dec
		Timothy C. Dec
		Senior Vice President and Chief Financial Officer

EXHIBIT 32.1

SUPERNUS PHARMACEUTICALS, INC.

CERTIFICATION PURSUANT TO

18 U.S.C. sec. 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report of Supernus Pharmaceuticals, Inc. (the “Company”) on Form 10-Q for the period ended September 30, 2024 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Jack A. Khattar, President and Chief Executive Officer of the Company, certify, pursuant to 18 U.S.C. sec. 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

(1)The Report fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2)The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.


Date: November 4, 2024	By:	/s/ Jack A. Khattar
		Jack A. Khattar President and Chief Executive Officer

EXHIBIT 32.2

SUPERNUS PHARMACEUTICALS, INC.

CERTIFICATION PURSUANT TO

18 U.S.C. sec. 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report of Supernus Pharmaceuticals, Inc. (the “Company”) on Form 10-Q for the period ended September 30, 2024 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Timothy C. Dec, Senior Vice President and Chief Financial Officer of the Company, certify, pursuant to 18 U.S.C. sec. 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

(1)The Report fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2)The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.


Date: November 4, 2024	By:	/s/ Timothy C. Dec
		Timothy C. Dec Senior Vice President and Chief Financial Officer

Cover Page - shares	9 Months Ended
Cover Page - shares	Sep. 30, 2024	Oct. 30, 2024
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2024
Document Transition Report	false
Entity File Number	001-35518
Entity Registrant Name	SUPERNUS PHARMACEUTICALS, INC.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	20-2590184
Entity Address, Address Line One	9715 Key West Avenue
Entity Address, City or Town	Rockville
Entity Address, State or Province	MD
Entity Address, Postal Zip Code	20850
City Area Code	301
Local Phone Number	838-2500
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Title of 12(b) Security	Common Stock, $0.001 par value per share
Entity Common Stock, Shares Outstanding		55,219,273
Trading Symbol	SUPN
Security Exchange Name	NASDAQ
Entity Central Index Key	0001356576
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2024
Document Fiscal Period Focus	Q3

Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Current assets
Cash and cash equivalents	$ 31,673	$ 75,054
Marketable securities	371,537	179,820
Accounts receivable, net	145,408	144,155
Inventories, net	63,981	77,408
Prepaid expenses and other current assets	27,404	16,676
Total current assets	640,003	493,113
Long-term marketable securities	0	16,617
Property and equipment, net	11,876	13,530
Intangible assets, net	540,156	599,889
Goodwill	117,019	117,019
Other assets	33,647	37,505
Total assets	1,342,701	1,277,673
Current liabilities
Accounts payable and accrued liabilities	75,803	79,569
Accrued product returns and rebates	169,124	154,274
Contingent consideration, current portion	46,581	52,070
Other current liabilities	0	4,283
Total current liabilities	291,508	290,196
Contingent consideration, long-term	403	1,380
Operating lease liabilities, long-term	28,926	33,196
Deferred income tax liabilities, net	7,364	24,963
Other liabilities	7,350	6,422
Total liabilities	335,551	356,157
Commitments and contingencies (Note 14)
Stockholders’ equity
Common stock, $0.001 par value; 130,000,000 shares authorized; 55,219,273 and 54,723,356 shares issued and outstanding as of September 30, 2024 and December 31, 2023, respectively	55	55
Additional paid-in capital	465,919	439,493
Accumulated other comprehensive earnings (loss), net of tax	78	(593)
Retained earnings	541,098	482,561
Total stockholders’ equity	1,007,150	921,516
Total liabilities and stockholders’ equity	$ 1,342,701	$ 1,277,673

Condensed Consolidated Balance Sheets (Parenthetical) - $ / shares	Sep. 30, 2024	Dec. 31, 2023
Stockholders’ equity
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock shares authorized (in shares)	130,000,000	130,000,000
Common stock shares issued (in shares)	55,219,273	54,723,356
Common stock shares outstanding (in shares)	55,219,273	54,723,356

Condensed Consolidated Statements of Earnings (Loss) - USD ($)
$ in Thousands

3 Months Ended

9 Months Ended

Sep. 30, 2024

Sep. 30, 2023

Sep. 30, 2024

Sep. 30, 2023

Revenues

Total revenues

$ 175,689

$ 153,880

$ 487,658

$ 443,207

Costs and expenses

Cost of goods sold

^[1]

17,583

19,601

51,808

64,152

Research and development

29,036

22,655

80,149

68,246

Selling, general and administrative

69,753

82,700

242,173

255,079

Amortization of intangible assets

19,488

21,242

59,733

61,316

Contingent consideration gain

(1,016)

(456)

(6,466)

(1,313)

Total costs and expenses

134,844

145,742

427,397

447,480

Operating earnings (loss)

40,845

8,138

60,261

(4,273)

Other income (expense)

Interest and other income, net

4,098

1,751

11,227

8,467

Interest expense

(2,415)

Total other income (expense)

4,098

1,751

11,227

6,052

Earnings before income taxes

44,943

9,889

71,488

1,779

Income tax expense

6,446

25,865

12,951

1,638

Net earnings (loss)

$ 38,497

$ (15,976)

$ 58,537

$ 141

Earnings (loss) per share

Basic (in dollars per share)

$ 0.70

$ (0.29)

$ 1.06

$ 0.00

Diluted (in dollars per share)

$ 0.69

$ (0.29)

$ 1.05

$ 0.00

Weighted average shares outstanding

Basic (in shares)

55,149,760

54,608,963

54,977,199

54,498,687

Diluted (in shares)

56,016,350

54,608,963

55,791,185

55,574,922

Net product sales

Revenues

Total revenues

$ 170,302

$ 149,004

$ 471,301

$ 417,915

Royalty, licensing and other revenues

Revenues

Total revenues

$ 5,387

$ 4,876

$ 16,357

$ 25,292

[1]	Excludes amortization of acquired intangible assets

Condensed Consolidated Statements of Comprehensive Earnings (Loss) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Statement of Comprehensive Income [Abstract]
Net earnings (loss)	$ 38,497	$ (15,976)	$ 58,537	$ 141
Other comprehensive gain
Unrealized gain on marketable securities, net of tax	450	569	671	2,004
Other comprehensive gain	450	569	671	2,004
Comprehensive earnings (loss)	$ 38,947	$ (15,407)	$ 59,208	$ 2,145

Condensed Consolidated Statements of Changes in Stockholders’ Equity - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Earnings (Loss)	Retained Earnings
Balance (in shares) at Dec. 31, 2022		54,253,796
Balance at Dec. 31, 2022	$ 886,204	$ 54	$ 408,115	$ (3,210)	$ 481,245
Increase (Decrease) in Stockholders' Equity
Share-based compensation expense related to employee stock purchase plan and share-based awards	6,306		6,306
Issuance of common stock related to employee stock purchase plan and share-based awards, net of taxes withheld (in shares)		216,826
Issuance of common stock related to employee stock purchase plan and share-based awards, net of taxes withheld	1,811		1,811
Net earnings (loss)	16,948				16,948
Unrealized gain on marketable securities, net of tax	881			881
Balance (in shares) at Mar. 31, 2023		54,470,622
Balance at Mar. 31, 2023	912,150	$ 54	416,232	(2,329)	498,193
Balance (in shares) at Dec. 31, 2022		54,253,796
Balance at Dec. 31, 2022	886,204	$ 54	408,115	(3,210)	481,245
Increase (Decrease) in Stockholders' Equity
Net earnings (loss)	141
Unrealized gain on marketable securities, net of tax	2,004
Balance (in shares) at Sep. 30, 2023		54,630,758
Balance at Sep. 30, 2023	912,191	$ 55	431,956	(1,206)	481,386
Balance (in shares) at Mar. 31, 2023		54,470,622
Balance at Mar. 31, 2023	912,150	$ 54	416,232	(2,329)	498,193
Increase (Decrease) in Stockholders' Equity
Share-based compensation expense related to employee stock purchase plan and share-based awards	6,088		6,088
Issuance of common stock related to employee stock purchase plan and share-based awards, net of taxes withheld (in shares)		122,279
Issuance of common stock related to employee stock purchase plan and share-based awards, net of taxes withheld	1,947	$ 1	1,946
Net earnings (loss)	(831)				(831)
Unrealized gain on marketable securities, net of tax	554			554
Balance (in shares) at Jun. 30, 2023		54,592,901
Balance at Jun. 30, 2023	919,908	$ 55	424,266	(1,775)	497,362
Increase (Decrease) in Stockholders' Equity
Share-based compensation expense related to employee stock purchase plan and share-based awards	7,920		7,920
Issuance of common stock related to employee stock purchase plan and share-based awards, net of taxes withheld (in shares)		37,857
Issuance of common stock related to employee stock purchase plan and share-based awards, net of taxes withheld	(230)		(230)
Net earnings (loss)	(15,976)				(15,976)
Unrealized gain on marketable securities, net of tax	569			569
Balance (in shares) at Sep. 30, 2023		54,630,758
Balance at Sep. 30, 2023	$ 912,191	$ 55	431,956	(1,206)	481,386
Balance (in shares) at Dec. 31, 2023	54,723,356	54,723,356
Balance at Dec. 31, 2023	$ 921,516	$ 55	439,493	(593)	482,561
Increase (Decrease) in Stockholders' Equity
Share-based compensation expense related to employee stock purchase plan and share-based awards	5,897		5,897
Issuance of common stock related to employee stock purchase plan and share-based awards, net of taxes withheld (in shares)		241,960
Issuance of common stock related to employee stock purchase plan and share-based awards, net of taxes withheld	1,570		1,570
Net earnings (loss)	124				124
Unrealized gain on marketable securities, net of tax	59			59
Balance (in shares) at Mar. 31, 2024		54,965,316
Balance at Mar. 31, 2024	$ 929,166	$ 55	446,960	(534)	482,685
Balance (in shares) at Dec. 31, 2023	54,723,356	54,723,356
Balance at Dec. 31, 2023	$ 921,516	$ 55	439,493	(593)	482,561
Increase (Decrease) in Stockholders' Equity
Net earnings (loss)	58,537
Unrealized gain on marketable securities, net of tax	$ 671
Balance (in shares) at Sep. 30, 2024	55,219,273	55,219,273
Balance at Sep. 30, 2024	$ 1,007,150	$ 55	465,919	78	541,098
Balance (in shares) at Mar. 31, 2024		54,965,316
Balance at Mar. 31, 2024	929,166	$ 55	446,960	(534)	482,685
Increase (Decrease) in Stockholders' Equity
Share-based compensation expense related to employee stock purchase plan and share-based awards	6,552		6,552
Issuance of common stock related to employee stock purchase plan and share-based awards, net of taxes withheld (in shares)		80,733
Issuance of common stock related to employee stock purchase plan and share-based awards, net of taxes withheld	1,658		1,658
Net earnings (loss)	19,916				19,916
Unrealized gain on marketable securities, net of tax	162			162
Balance (in shares) at Jun. 30, 2024		55,046,049
Balance at Jun. 30, 2024	957,454	$ 55	455,170	(372)	502,601
Increase (Decrease) in Stockholders' Equity
Share-based compensation expense related to employee stock purchase plan and share-based awards	7,674		7,674
Issuance of common stock related to employee stock purchase plan and share-based awards, net of taxes withheld (in shares)		173,224
Issuance of common stock related to employee stock purchase plan and share-based awards, net of taxes withheld	3,075		3,075
Net earnings (loss)	38,497				38,497
Unrealized gain on marketable securities, net of tax	$ 450			450
Balance (in shares) at Sep. 30, 2024	55,219,273	55,219,273
Balance at Sep. 30, 2024	$ 1,007,150	$ 55	$ 465,919	$ 78	$ 541,098

Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Cash flows from operating activities
Net earnings	$ 58,537	$ 141
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization	61,569	63,183
Amortization of deferred financing costs and debt discount	0	532
Amortization of premium/discount on marketable securities	2,497	(849)
Change in fair value of contingent consideration	(6,466)	(1,313)
Realized gains from sales of marketable securities	(9)	0
Other noncash adjustments, net	8,281	10,485
Share-based compensation expense	20,123	20,314
Deferred income tax benefit	(20,064)	(15,255)
Changes in operating assets and liabilities:
Accounts receivable	(1,253)	21,155
Inventories	12,619	1,082
Prepaid expenses and other assets	(8,542)	(8,138)
Accrued product returns and rebates	14,850	10,808
Accounts payable and other liabilities	(14,597)	(36,018)
Net cash provided by operating activities	127,545	66,127
Cash flows from investing activities
Purchases of marketable securities	(542,608)	0
Maturities of marketable securities	365,891	335,297
Purchases of property and equipment	(512)	(587)
Net cash provided by (used in) investing activities	(177,229)	334,710
Cash flows from financing activities
Proceeds from Credit Line	0	93,000
Payments on Credit Line	0	(93,000)
Payment on convertible notes	0	(402,500)
Proceeds from issuance of common stock	8,031	5,518
Employee taxes paid related to net share settlement of equity awards	(1,728)	(1,990)
Net cash provided by (used in) financing activities	6,303	(398,972)
Net change in cash and cash equivalents	(43,381)	1,865
Cash and cash equivalents at beginning of year	75,054	93,120
Cash and cash equivalents at end of period	31,673	94,985
Supplemental cash flow information
Cash paid for interest on debt	0	1,946
Cash paid for income taxes	40,343	27,055
Cash paid for operating leases	13,224	13,242
Noncash investing and financing activities
Lease assets obtained for new operating leases	$ 3,547	$ 5,903

Business Organization	9 Months Ended
Business Organization	Sep. 30, 2024
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Business Organization	Business Organization Supernus Pharmaceuticals, Inc. (the Company, see Consolidation in Note 2, Summary of Significant Accounting Policies) is a biopharmaceutical company focused on developing and commercializing products for the treatment of central nervous system (CNS) diseases. The Company's diverse neuroscience portfolio includes approved treatments for epilepsy, migraine, attention-deficit hyperactivity disorder (ADHD), hypomobility in Parkinson’s Disease (PD), cervical dystonia, chronic sialorrhea, and dyskinesia in PD patients receiving levodopa-based therapy. The Company is developing a broad range of novel CNS product candidates including new potential treatments for hypomobility in PD, epilepsy, depression, and other CNS disorders. The Company has seven commercial products that it markets: Qelbree®, GOCOVRI®, Oxtellar XR®, Trokendi XR®, APOKYN®, XADAGO®, and MYOBLOC®. In addition, SPN-830 (apomorphine infusion device) is a late-stage drug/device combination product candidate for the continuous treatment of motor fluctuations ("OFF" episodes) in PD patients that are not adequately controlled with oral levodopa and one or more adjunct PD medications. In August 2024, the Company resubmitted to the U.S Food and Drug Administration (FDA) the New Drug Application (NDA) for apomorphine infusion device (SPN-830) for the continuous treatment of motor fluctuations ("OFF" episodes) in Parkinson’s disease. On August 16, 2024, the FDA acknowledged the resubmission of the NDA for the apomorphine infusion device (SPN-830). The resubmission is considered filed, with a user fee goal date (PDUFA date) of February 1, 2025.

Summary of Significant Accounting Policies	9 Months Ended
Summary of Significant Accounting Policies	Sep. 30, 2024
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Summary of Significant Accounting Policies Basis of Presentation The Company’s unaudited condensed consolidated financial statements have been prepared in accordance with the requirements of the U.S. Securities and Exchange Commission (SEC) for interim financial information. As permitted under Generally Accepted Accounting Principles in the United States (U.S. GAAP), certain notes and other information have been omitted from the interim unaudited condensed consolidated financial statements presented in this Quarterly Report on Form 10-Q. Therefore, these unaudited condensed consolidated financial statements should be read in conjunction with the Company’s most recent Annual Report on Form 10-K, for the year ended December 31, 2023, filed with the SEC. In management’s opinion, the unaudited condensed consolidated financial statements include all normal and recurring adjustments necessary for a fair presentation of the Company’s financial position, results of operations, and cash flows. The results of operations for any interim period are not necessarily indicative of the Company’s future quarterly or annual results. The Company, which is primarily located in the U.S., operates in one operating segment. Reclassifications The prior year amount related to the caption Employee taxes paid related to net share settlement of equity awards in the condensed consolidated statements of cash flows has been reclassified to conform to current year presentation. The reclassification did not affect the other condensed consolidated financial statements. Consolidation The Company's unaudited condensed consolidated financial statements include the accounts of Supernus Pharmaceuticals, Inc. and its wholly owned subsidiaries. These are collectively referred to herein as "Supernus" or "the Company." Supernus Pharmaceuticals, Inc. and each of its subsidiaries are distinct legal entities. All material intercompany transactions and balances have been eliminated in consolidation. The unaudited condensed consolidated financial statements reflect the consolidation of entities in which the Company has a controlling financial interest. In determining whether there is a controlling financial interest, the Company considers if it has a majority of the voting interests of the entity, or if the entity is a variable interest entity (VIE) and if the Company is the primary beneficiary. In determining the primary beneficiary of a VIE, the Company evaluates whether it has both: the power to direct the activities of the VIE that most significantly impact the VIE's economic performance; and the obligation to absorb losses of, or the right to receive benefits from the VIE that could potentially be significant to that VIE. The Company's judgment with respect to its level of influence or control of an entity involves the consideration of various factors, including the form of an ownership interest; representation in the entity's governance; the size of the investment; estimates of future cash flows; the ability to participate in policymaking decisions; and the rights of the other investors to participate in the decision making process, including the right to liquidate the entity, if applicable. If the Company is not the primary beneficiary of the VIE, and an ownership interest is maintained in the entity, the interest is accounted for under the equity or cost methods of accounting, as appropriate. The Company continuously assesses whether it is the primary beneficiary of a VIE as changes to existing relationships or future transactions may affect its conclusions. Use of Estimates The Company bases its estimates on: historical experience; forecasts; information received from its service providers; information from other sources, including public and proprietary sources; and other assumptions that the Company believes are reasonable under the circumstances. Actual results could differ materially from the Company’s estimates. The Company periodically evaluates the methodologies employed in making its estimates. Advertising Expense Advertising expense includes the cost of promotional materials and activities, such as printed materials and digital marketing, marketing programs and speaker programs. The cost of the Company's advertising efforts is expensed as incurred. The Company incurred approximately $19.6 million and $67.5 million in advertising expense for the three and nine months ended September 30, 2024, respectively, and approximately $25.1 million and $76.9 million for the three and nine months ended September 30, 2023. These expenses are recorded as a component of Selling, general and administrative expenses in the unaudited condensed consolidated statements of earnings (loss). Insurance Recoveries The Company has several policies with third-party insurers that provide for the recovery of certain costs incurred by the Company. The Company records our rights to insurance recoveries as a receivable when the respective costs are reimbursable under applicable insurance policies, it is probable that such costs will be reimbursed, and reimbursement can be reasonably estimated. As such, the Company estimates the percentage of costs that will be reimbursed by the insurance provider to determine the proper amount to record for the insurance recovery receivable. The Company recorded approximately $11.5 million and $12.0 million of insurance recoveries during the three and nine months ended September 30, 2024, respectively. There were no insurance recoveries during the three and nine months ended September 30, 2023. To date, there have not been any material adjustments to our prior estimates of the insurance recovery receivable. Insurance recoveries recognized in fiscal year 2024 were recorded as a reduction to Selling, general and administrative expenses. Recently Issued Accounting Pronouncements and Disclosure Rules New Accounting Pronouncements Not Yet Adopted Accounting Standards Update (ASU) 2023-07, Improvements to Reportable Segment Disclosures (Topic 280) - The new standard, issued in November 2023, improves reportable segment disclosure requirements, primarily through enhanced disclosures about significant segment expenses that are regularly provided to the chief operating decision maker. ASU 2023-07 also clarifies that entities with a single reportable segment are subject to both new and existing reporting requirements under Topic 280. The standard is effective for fiscal years beginning after December 15, 2023, and interim periods within fiscal years beginning after December 15, 2024, on a retrospective basis, with early adoption permitted. The Company plans to adopt the guidance for the fiscal year ending December 31, 2024. The Company expects ASU 2023-07 to require additional disclosures in the notes to its consolidated financial statements. The Company is currently evaluating the effects the adoption of this guidance will have on the consolidated financial statements. ASU 2023-09, Improvements to Income Tax Disclosures (Topic 740) - The new standard, issued in December 2023, requires entities to disclose additional information with respect to the effective tax rate reconciliation and to disclose the disaggregation by jurisdiction of income tax expense and income taxes paid. The standard is effective with annual periods beginning after December 15, 2024, with early adoption permitted. The standard is to be applied on a prospective basis, although optional retrospective application is permitted. The Company plans to adopt the guidance for the fiscal year ending December 31, 2025. The Company expects ASU 2023-09 to require additional disclosures in the notes to its consolidated financial statements. The Company is currently evaluating the effects the adoption of this guidance will have on the consolidated financial statements. SEC Final Climate Rule In March 2024, the U.S. Securities and Exchange Commission (SEC) adopted the final rule under SEC Release No. 33-11275, The Enhancement and Standardization of Climate-Related Disclosures for Investors (Final Rule). This rule will require registrants to disclose certain climate-related information in registration statements and annual reports with staggered compliance dates for large accelerated filers for the various aspects of the Final Rule. On April 4, 2024, the SEC issued an order staying the Final Rule. The SEC’s administrative stay is expected to remain in place until the completion of litigation filed in various federal courts challenging, among other things, the agency’s authority to adopt the Final Rule. The Company is currently evaluating the final rule to determine its impact on the Company's disclosures.

Disaggregated Revenues

9 Months Ended

Sep. 30, 2024

Disaggregation of Revenue [Abstract]

Disaggregated Revenues

The following table provides information regarding total revenues (dollars in thousands):


	Three Months Ended September 30,				Nine Months Ended September 30,
	2024		2023		2024		2023
	(unaudited)				(unaudited)
Net product sales
Qelbree	$	62,359	$	37,081	$	166,857	$	93,840
GOCOVRI	35,657		32,889		93,922		87,650
Oxtellar XR	29,805		29,644		86,265		82,359
APOKYN	19,867		21,510		53,811		56,324
Trokendi XR	15,318		20,625		48,393		74,734
Other(1)	7,296		7,255		22,053		23,008
Total net product sales	170,302		149,004		471,301		417,915
Royalty, licensing and other revenues	5,387		4,876		16,357		25,292
Total revenues	$	175,689	$	153,880	$	487,658	$	443,207

___________________________________________

(1) Includes net product sales of MYOBLOC, XADAGO and Osmolex ER.

In December 2023, the Company submitted to the FDA a notification of discontinuance to withdraw Osmolex ER from distribution. Distribution of Osmolex ER ceased on April 1, 2024.

Investments

9 Months Ended

Sep. 30, 2024

Investments, Debt and Equity Securities [Abstract]

Investments

Marketable Securities

Unrestricted available-for-sale marketable securities held by the Company are as follows (dollars in thousands):


	September 30, 2024		December 31, 2023
	(unaudited)
Corporate, U.S. government agency and municipal debt securities
Amortized cost	$	371,381	$	197,153
Gross unrealized gains	263		5
Gross unrealized losses	(107)		(721)
Total fair value	$	371,537	$	196,437

As of September 30, 2024, all of our unrestricted available-for-sale marketable securities have contractual maturities of one year or less.

As of September 30, 2024, there was no impairment due to credit loss on any available-for-sale marketable securities.

Fair Value of Financial Instruments

9 Months Ended

Sep. 30, 2024

Fair Value Disclosures [Abstract]

Fair Value of Financial Instruments

The fair value of an asset or liability represents the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between unrelated market participants.

•Level 1—Valuations based on unadjusted quoted prices in active markets that are accessible at measurement date for identical assets.

Financial Assets and Liabilities Recorded at Fair Value

The Company’s financial assets and liabilities that are required to be measured at fair value on a recurring basis are as follows (dollars in thousands):


	Fair Value Measurements as of September 30, 2024 (unaudited)
	Total		Level 1		Level 2		Level 3
Assets:
Cash and cash equivalents
Cash	$	31,080	$	31,080	$	—	$	—
Money market funds	593		593		—		—
Marketable securities
Corporate, U.S. government agency and municipal debt securities	371,537		—		371,537		—


Other noncurrent assets
Marketable securities - restricted (SERP)	635		19		616		—
Total assets at fair value	$	403,845	$	31,692	$	372,153	$	—
Liabilities:
Contingent consideration	$	46,984	$	—	$	—	$	46,984
Total liabilities at fair value	$	46,984	$	—	$	—	$	46,984


	Fair Value Measurements as of December 31, 2023
	Total		Level 1		Level 2		Level 3
Assets:
Cash and cash equivalents
Cash	$	35,957	$	35,957	$	—	$	—
Money market funds	39,097		39,097		—		—
Marketable securities
Corporate, U.S. government agency and municipal debt securities	179,820		—		179,820		—
Long-term marketable securities
Corporate and municipal debt securities	16,617		—		16,617		—
Other noncurrent assets
Marketable securities - restricted (SERP)	568		16		552		—
Total assets at fair value	$	272,059	$	75,070	$	196,989	$	—
Liabilities:
Contingent consideration	$	53,450	$	—	$	—	$	53,450
Total liabilities at fair value	$	53,450	$	—	$	—	$	53,450

Other Financial Instruments

The carrying amounts of other financial instruments, including accounts receivable, accounts payable, and accrued expenses approximate fair value due to their short-term maturities.

Contingent Consideration

9 Months Ended

Sep. 30, 2024

Business Combination, Asset Acquisition, and Joint Venture Formation [Abstract]

Contingent Consideration

The following table provides the current and long-term portions related to the contingent consideration for the USWM Acquisition and Adamas Acquisition (as defined below) (dollars in thousands):


	September 30, 2024		December 31, 2023
Reported under the following captions in the condensed consolidated balance sheets:	(unaudited)
Contingent consideration, current portion	$	46,581	$	52,070
Contingent consideration, long-term	403		1,380
Total	$	46,984	$	53,450

USWM Contingent Consideration

comprised of (1) $25 million related to the FDA's approval of the SPN-830 NDA and (2) $30 million related to the subsequent commercial product launch.

Adamas Contingent Consideration

Change in the Fair Value of Contingent Consideration

The following tables provide a reconciliation of the beginning and ending balances related to the contingent consideration for the USWM Acquisition and Adamas Acquisition (dollars in thousands):


	USWM Acquisition		Adamas Acquisition		Total
Balance at December 31, 2023	$	46,400	$	7,050	$	53,450
Change in fair value recognized in earnings	130		(6,596)		(6,466)
Balance at September 30, 2024 (unaudited)	$	46,530	$	454	$	46,984


	USWM Acquisition		Adamas Acquisition		Total
Balance at December 31, 2022	$	46,270	$	8,697	$	54,967
Change in fair value recognized in earnings	(390)		(923)		(1,313)
Balance at September 30, 2023 (unaudited)	$	45,880	$	7,774	$	53,654

The Company recorded the following changes in fair value of the contingent consideration liability for the USWM milestones:

The Company recorded the following changes in fair value of the contingent consideration liabilities for the Adamas CVRs:

Intangible Assets, Net

9 Months Ended

Sep. 30, 2024

Goodwill and Intangible Assets Disclosure [Abstract]

Intangible Assets, Net

Intangibles Assets, Net

The following table sets forth the gross carrying amounts and related accumulated amortization of intangible assets (dollars in thousands):


	September 30, 2024							December 31, 2023
	(unaudited)
	Remaining Weighted Average Life (Years)	Carrying Amount, Gross		Accumulated Amortization		Carrying Amount, Net		Carrying Amount, Gross		Accumulated Amortization		Carrying Amount, Net
Acquired in-process research and development		$	124,000	$	—	$	124,000	$	124,000	$	—	$	124,000
Intangible assets subject to amortization:
Acquired developed technology and product rights	6.15	661,311		(245,155)		416,156		661,311		(190,395)		470,916
Capitalized patent defense costs	0.00	43,820		(43,820)		—		43,820		(38,847)		4,973
Total intangible assets	6.15	$	829,131	$	(288,975)	$	540,156	$	829,131	$	(229,242)	$	599,889

The Company entered into settlement and license agreements that allows third parties to enter the XADAGO market in December 2027, or sooner under certain conditions.

Debt	9 Months Ended
Debt	Sep. 30, 2024
Debt Disclosure [Abstract]
Debt	Debt Uncommitted Demand Secured Line of Credit On February 8, 2023, the Company entered into a credit line agreement with UBS (the Credit Line). The Credit Line provides for a revolving line of credit of up to $150 million, which can be drawn at any time. Any fixed rate borrowing will bear interest at a fixed interest rate, equal to the sum of (i) the UBS Fixed Funding Rate (as defined in the Credit Line) plus (ii) the applicable Percentage Spread established in the Credit Line. Any variable rate borrowing will bear interest at a variable interest rate, equal to the sum of (i) the UBS Variable Rate (as defined in the Credit Line) plus (ii) the applicable Percentage Spread established in the Credit Line. The Credit Line is secured by a first priority lien and security interest in certain of the Company’s assets, including each account of the Company at UBS Financial Services Inc. (the Collateral Account), and other such collateral (collectively, the Collateral), as further defined in the Credit Line. The Company may be required to post additional collateral if the value of the Collateral declines below the required collateral maintenance requirements. Upon certain customary events of default, all amounts due under the Credit Line will become immediately due and payable without demand, and UBS has the right, in its discretion, to liquidate, transfer, withdraw or sell all or any part of the Collateral and apply the proceeds to repay any borrowings pursuant to the Credit Line. The Company has the right to repay any variable rate advance under the Credit Line at any time, in whole or in part, without penalty. The Company may repay any fixed rate advance in whole, but may not repay any fixed rate advance in part. In its discretion and without cause, UBS has the right at any time to demand full or partial payment of amounts borrowed pursuant to the Credit Line and terminate the Credit Line. On March 30, 2023, the Company borrowed $93.0 million under the Credit Line, which bore a variable interest rate. The funds from this borrowing were used to repay outstanding indebtedness under the 0.625% Convertible Senior Notes Due 2023 (2023 Notes). In the second quarter of 2023, the Company repaid the total principal balance of $93.0 million under the Credit Line and the interest incurred on the Credit Line of $0.7 million. As of September 30, 2024, there was no outstanding debt under the Credit Line.

Share-Based Payments

9 Months Ended

Sep. 30, 2024

Share-Based Payment Arrangement [Abstract]

Share-Based Payments

Equity Incentive Plan

Share-based compensation expense is as follows (dollars in thousands):


	Three Months Ended September 30,				Nine Months Ended September 30,
	2024		2023		2024		2023
	(unaudited)				(unaudited)
Research and development	$	1,350	$	1,254	$	3,946	$	3,458
Selling, general and administrative	6,324		6,666		16,177		16,856
Total	$	7,674	$	7,920	$	20,123	$	20,314

Stock Option

The following table summarizes stock option activities:


	Number of Options	Weighted Average Exercise Price		Weighted Average Remaining Contractual Term (in years)
Outstanding, December 31, 2023	6,583,822	$	29.20	5.90
Granted	1,171,612	$	28.05
Exercised	(336,868)	$	20.23
Forfeited	(251,657)	$	31.71
Outstanding, September 30, 2024 (unaudited)	7,166,909	$	29.34	5.87

As of September 30, 2024 (unaudited):
Vested and expected to vest	7,166,909	$	29.34	5.87
Exercisable	4,560,609	$	27.95	4.33

As of December 31, 2023:
Vested and expected to vest	6,583,822	$	29.20	5.90
Exercisable	4,110,537	$	26.58	4.43

Restricted Stock Units

The following table summarizes restricted stock unit (RSU) activities:


	Number of RSUs	Weighted Average Grant Date Fair Value per Share
Nonvested, December 31, 2023	300,141	$	36.90
Granted	198,414	$	28.06
Vested	(100,891)	$	36.51
Forfeited	(19,124)	$	34.64
Nonvested, September 30, 2024 (unaudited)	378,540	$	32.48

Performance Share Units

The following table summarizes performance share unit (PSU) activities:


	Performance-Based Units			Market-Based Units			Total PSUs
	Number of PSUs	Weighted Average Grant Date Fair Value per Share		Number of PSUs	Weighted Average Grant Date Fair Value per Share		Number of PSUs	Weighted Average Grant Date Fair Value per Share
Nonvested, December 31, 2023	251,630	$	32.22	20,000	$	28.63	271,630	$	31.96
Granted	252,700	$	26.91	—	$	—	252,700	$	26.91
Vested	(62,980)	$	33.67	—	$	—	(62,980)	$	33.67
Forfeited	(58,050)	$	29.37	—	$	—	(58,050)	$	29.37
Nonvested, September 30, 2024 (unaudited)	383,300	$	28.91	20,000	$	28.63	403,300	$	28.90

Earnings (Loss) per Share

9 Months Ended

Sep. 30, 2024

Earnings Per Share [Abstract]

Earnings (Loss) per Share


	Three Months Ended September 30,				Nine Months Ended September 30,
	2024		2023		2024		2023
	(unaudited)				(unaudited)
Numerator:
Net earnings (loss)	$	38,497	$	(15,976)	$	58,537	$	141
Denominator:
Weighted average shares outstanding, basic	55,149,760		54,608,963		54,977,199		54,498,687
Effect of dilutive securities:
Stock options and stock awards	866,590		—		813,986		1,076,235
Weighted average shares outstanding, diluted	56,016,350		54,608,963		55,791,185		55,574,922

Earnings (loss) per share, basic	$	0.70	$	(0.29)	$	1.06	$	0.00
Earnings (loss) per share, diluted	$	0.69	$	(0.29)	$	1.05	$	0.00

would be anti-dilutive:


	Three Months Ended September 30,		Nine Months Ended September 30,
	2024	2023	2024	2023
	(unaudited)		(unaudited)
2023 Notes	—	—	—	2,261,312
Stock options and stock awards	712,457	411,506	772,255	486,080

Income Tax Expense

9 Months Ended

Sep. 30, 2024

Income Tax Disclosure [Abstract]

Income Tax Expense

The following table provides information regarding the Company’s income tax expense for the three and nine months ended September 30, 2024 and 2023 (dollars in thousands):


	Three Months Ended September 30,						Nine Months Ended September 30,
	2024			2023			2024			2023
	(unaudited)						(unaudited)
Income tax expense	$	6,446		$	25,865		$	12,951		$	1,638
Effective tax rate	14.3		%	261.6		%	18.1		%	92.1		%

Leases

9 Months Ended

Sep. 30, 2024

Leases [Abstract]

Leases

Operating lease assets and lease liabilities as reported on the condensed consolidated balance sheets are as follows (dollars in thousands):


	Balance Sheet Classification	September 30, 2024		December 31, 2023
		(unaudited)
Assets
Operating lease assets	Other assets	$	26,086	$	28,994
Total lease assets		$	26,086	$	28,994

Liabilities
Operating lease liabilities, current portion	Accounts payable and accrued liabilities	$	9,227	$	8,331
Operating lease liabilities, long-term	Operating lease liabilities, long-term	28,926		33,196
Total lease liabilities		$	38,153	$	41,527

Composition of Other Balance Sheet Items

9 Months Ended

Sep. 30, 2024

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Composition of Other Balance Sheet Items

The following details the composition of other balance sheet items (dollars in thousands for amounts in tables):

Inventories, Net


	September 30, 2024		December 31, 2023
	(unaudited)
Raw materials	$	11,571	$	16,274
Work in process	28,102		31,212
Finished goods	24,308		29,922
Total	$	63,981	$	77,408

Property and Equipment, Net


	September 30, 2024		December 31, 2023
	(unaudited)
Lab equipment and furniture	$	13,174	$	13,069
Leasehold improvements	14,023		14,023
Software	883		883
Computer equipment	1,037		960
	29,117		28,935
Less accumulated depreciation and amortization	(17,241)		(15,405)
Property and equipment, net	$	11,876	$	13,530

Accounts Payable and Accrued Liabilities


	September 30, 2024		December 31, 2023
	(unaudited)
Accounts payable	$	6,392	$	1,964
Accrued compensation, benefits, & related accruals	20,284		20,722
Accrued sales & marketing	10,466		11,666
Accrued manufacturing expenses	5,573		11,652
Accrued R&D expenses	7,911		10,530
Operating lease liabilities, current portion (1)	9,227		8,331
Accrued royalties (2)	7,849		7,918
Other accrued expenses	8,101		6,786
Total	$	75,803	$	79,569

_______________________________

(1) Refer to Note 12, Leases.

(2) Refer to Note 14, Commitments and Contingencies.

Accrued Product Returns and Rebates


	September 30, 2024		December 31, 2023
	(unaudited)
Accrued product rebates	$	111,695	$	96,984
Accrued product returns	57,429		57,290
Total	$	169,124	$	154,274

Commitments and Contingencies	9 Months Ended
Commitments and Contingencies	Sep. 30, 2024
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Product Licenses The Company has obtained exclusive licenses from third parties for proprietary rights to support the product candidates in the Company's CNS portfolio. Under these license agreements, the Company may be required to pay certain amounts upon the achievement of defined milestones. If these products are ultimately commercialized, the Company is also obligated to pay royalties to third parties, computed as a percentage of net product sales, for each respective product under a license agreement. Through the USWM Acquisition, the Company acquired licensing agreements with other pharmaceutical companies for APOKYN, XADAGO, and MYOBLOC. The Company is obligated to pay royalties to third parties, computed as a percentage of net product sales, for each of the products under the respective license agreements. The royalty expense incurred for these acquired products is recognized as Cost of goods sold in the condensed consolidated statements of earnings (loss). Navitor Development Agreement In April 2020, the Company entered into a development agreement (Development Agreement) with Navitor Pharmaceuticals, Inc. (Navitor Inc.). The Company can terminate the Development Agreement upon 30 days' notice. Under the terms of the Development Agreement, the Company and Navitor Inc. will jointly conduct a Phase II clinical program for NV-5138 (SPN-820) for treatment-resistant depression. The Company agreed to bear certain Phase I and Phase II development costs incurred by either party, up to a maximum of $50 million, which amount could be increased under the terms of the Development Agreement upon Navitor’s request and the Company’s consent. In 2020, the Company paid a one-time, nonrefundable, and non-creditable fee of $10 million for the option to acquire or license NV-5138 (SPN-820) and made a $15 million equity investment representing approximately 13% ownership in Navitor Inc. There are also certain additional payments which could be incurred by the Company that are contingent upon Navitor Inc. achieving defined milestones. These payments include an additional license or acquisition fee depending on whether the Company ultimately licenses or acquires NV-5138 (SPN-820), and subsequent clinical, regulatory and sales milestone payments. The total payments, exclusive of the royalty payments on net sales of NV-5138 (SPN-820) and development costs paid by the Company under the agreement, have the potential to reach $410 million to $475 million, which includes an aggregate upfront payment of $25 million paid in 2020 for the option to acquire or license NV-5138 (SPN-820) and the equity investment, an additional license or acquisition fee depending on whether the Company ultimately licenses or acquires NV-5138 (SPN-820), and subsequent clinical, regulatory and sales based milestone payments. The Company also will have the first right of refusal for any compound with a similar mechanism of action to NV-5138 (SPN-820) on mTORC1 in the central nervous system. In addition to entering into the Development Agreement in April 2020, as above mentioned, the Company acquired Series D Preferred Shares of Navitor Inc. (the Navitor Shares), an equity investment representing an approximately 13% ownership position in Navitor Inc. As part of a legal restructuring in March 2021, the Company's Navitor Inc. Shares were exchanged for membership interests in Navitor Pharmaceutics LLC (Navitor LLC), which became the sole shareholder of Navitor Inc. The Company has determined that although Navitor LLC is a VIE, the Company does not consolidate the results of this VIE into its financial results because the Company lacks the power to direct the activities that most significantly impact Navitor’s economic performance. In the second quarter of 2024, the Company consented to payment of additional Phase II development costs for NV-5138 (SPN-820) as they are incurred, but reserves the right to terminate payment of future development costs at its discretion. The maximum exposure to losses related to Navitor LLC includes the approximately $50 million for Phase I and Phase II development of NV-5138 (SPN-820) already paid by the Company, plus the cost of other development and formulation activities provided by the Company and additional Phase II development costs the Company agreed to pay pursuant to the Development Agreement. Subsequent to the Development Agreement entered into in 2020, no additional equity investment has been made or financing has been provided to Navitor Inc. or Navitor LLC. USWM Enterprise Commitments Assumed As part of the USWM Acquisition, the Company assumed the remaining commitments of USWM Enterprises and its subsidiaries, which are discussed below. The Company assumed the annual minimum purchase requirement of MYOBLOC, amounting to an estimated €3.9 million annually, under the contract manufacturing agreement with Merz for manufacture and supply. MDD US Operations, LLC (formerly US WorldMeds, LLC) and its subsidiary, Solstice Neurosciences, LLC (US) (collectively, the MDD Subsidiaries) entered into a Corporate Integrity Agreement (CIA) with the Office of Inspector General of the U.S. Department of Health and Human Services which was effective in April 2019. Under the CIA, the MDD Subsidiaries agreed to and paid $17.5 million to resolve U.S. Department of Justice allegations that it violated the False Claims Act and committed to the establishment and ongoing maintenance of an effective compliance program. The fine was paid by the MDD Subsidiaries prior to closing of the USWM Acquisition. As part of the USWM Acquisition, the Company assumed the obligations of the CIA and could become liable for payment of certain stipulated monetary penalties in the event of any CIA violations. In addition, the Company continues to maintain a broad array of processes, policies and procedures necessary to comply with the CIA and submitted its final report during the second quarter of 2024. Claims and Litigation From time to time, the Company may be involved in various claims, litigation and legal proceedings. These matters may involve patent litigation, product liability and other product-related litigation, commercial and other matters, and government investigations, among others. On a quarterly basis, the Company reviews the status of each significant matter and assesses its potential financial exposure. If the potential loss from any claim, asserted or unasserted, or legal proceeding is considered probable and the amount can be reasonably estimated, the Company will accrue a liability for the estimated loss. Because of uncertainties related to claims, legal proceedings and litigation, accruals will be based on the Company's best estimates based on available information. The Company does not believe that any of these matters will have a material adverse effect on our financial position. The Company may reassess the potential liability related to these matters and may revise these estimates. The process of resolving matters through litigation or other means is inherently uncertain and it is possible that an unfavorable resolution of these matters will adversely affect the Company, its results of operations, financial condition and cash flows. NAMENDA XR/Namzaric Qui Tam Litigation On April 1, 2019, Adamas was served with a complaint filed in the United States District Court for the Northern District of California (the District Court) (Case No. 3:18-cv-03018-JCS) against it and several Allergan entities alleging violations of federal and state false claims acts (FCA) in connection with the commercialization of NAMENDA XR and Namzaric by Allergan. The lawsuit is a qui tam complaint brought by an individual, asserting rights of the federal government and various state governments. The lawsuit was originally filed in May 2018 under seal, and Adamas became aware of the lawsuit when it was served. The complaint alleges that patents held by Allergan and Adamas covering NAMENDA XR and Namzaric were procured through fraud on the United States Patent and Trademark Office and that these patents were asserted against potential generic manufacturers of NAMENDA XR and Namzaric to prevent the generic manufacturers from entering the market, thereby wrongfully excluding generic competition resulting in artificially high price being charged to government payors. Adamas' patents in question were licensed exclusively to Forest Laboratories Holdings Limited. The complaint includes a claim for damages of "potentially more than $2.5 billion dollars," treble damages and statutory penalties. To date the federal and state governments have declined to intervene in this action. This case is currently stayed pending Adamas's and Allergan's interlocutory appeal of the District Court's December 11, 2020 order denying Adamas's and Allergan's motion to dismiss the complaint. The appeal is pending in the United States Court of Appeals for the Ninth Circuit (Case No. 21-80005). Argument was held on January 10, 2022. On August 25, 2022, the Ninth Circuit sided with the defendants by reversing the District Court’s public disclosure bar rulings and remanding the case back to the District Court to decide certain issues in the first instance. On October 11, 2022, the plaintiff filed a petition for rehearing with the Ninth Circuit which was denied on November 3, 2022. On December 23, 2022, the defendants filed renewed motions to dismiss directed to the remaining unresolved issue. On March 20, 2023, the District Court entered an order and final judgement dismissing with prejudice the FCA claim while declining to exercise supplemental jurisdiction over the state false claims act claims which were dismissed without prejudice. On April 19, 2023, the plaintiff appealed the District Court's dismissal of the Federal False Claims Act claim. On February 20, 2024, the plaintiff filed a motion for an indicative ruling and to set aside the judgment in the District Court, based on the same arguments raised in his appeal. That motion was fully briefed and the District Court determined that the motion for an indicative ruling was suitable for determination without a hearing. On May 7, 2024, the District Court denied the plaintiff’s motion for an indicative ruling. The appeal is fully briefed, and the Ninth Circuit has set oral argument for November 21, 2024. APOKYN Litigation On October 3, 2022, Sage Chemical, Inc. and TruPharma, LLC filed a lawsuit in the United States District Court for the District of Delaware (Case No.22-cv-1302) alleging that Supernus Pharmaceuticals, Inc., Britannia Pharmaceuticals Limited, and US WorldMeds Partners, LLC violated state and federal antitrust law in connection with APOKYN. On January 10, 2023, the Company filed motions to dismiss all claims and the lawsuit in its entirety. Between May 9, 2024 and June 4, 2024, the Court ruled on all motions to dismiss, declining to dismiss any claims against the Company, its subsidiaries, or Britannia Pharmaceuticals Limited and dismissing US WorldMeds Partners, LLC, USWM, LLC, and all of the individual defendants (former US WorldMeds executives) out of the case completely. On June 13, 2024, the Court issued a scheduling order that provides for a pretrial conference on September 12, 2025 and a jury trial beginning on September 22, 2025. Pre-trial discovery is ongoing as of the date of this filing. The Company intends to defend itself vigorously. However, the Company can offer no assurances that it will be successful in a litigation.

Pay vs Performance Disclosure - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
Pay vs Performance Disclosure - USD ($) $ in Thousands	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2024	Sep. 30, 2023
Pay vs Performance Disclosure
Net earnings (loss)	$ 38,497	$ 19,916	$ 124	$ (15,976)	$ (831)	$ 16,948	$ 58,537	$ 141

Insider Trading Arrangements

3 Months Ended

9 Months Ended

Sep. 30, 2024

Trading Arrangements, by Individual

Material Terms of Trading Arrangement

Name and Title of Director or Officer

Rule 10b5-1 Trading Arrangement(1)

Trading Arrangement Adopted or Terminated

Date of Adoption or Termination

Duration of Trading Arrangement

Aggregate Number of Securities to be Purchased Pursuant to Trading Arrangement

Aggregate Number of Securities to be Sold Pursuant to Trading Arrangement

Jack Khattar, President, Chief Executive Officer and Director

Yes

Terminated

August 12, 2024

First Transaction Date through August 12, 2024

—

75,037

Padmanabh Bhatt

SVP, Chief Scientific Officer, Intellectual Property

Yes

Adopted

September 3, 2024

First Transaction Date through March 31, 2025

131,995

131,995 (2)

____________________________________

(1) Indicates whether the trading arrangement is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c).

Non-Rule 10b5-1 Arrangement Adopted

false

Non-Rule 10b5-1 Arrangement Terminated

false

Jack Khattar [Member]

Trading Arrangements, by Individual

Name

Jack Khattar

Title

President, Chief Executive Officer and Director

Rule 10b5-1 Arrangement Terminated

true

Termination Date

August 12, 2024

Aggregate Available

75,037

Padmanabh Bhatt [Member]

Trading Arrangements, by Individual

Name

Padmanabh Bhatt

Title

SVP, Chief Scientific Officer, Intellectual Property

Rule 10b5-1 Arrangement Adopted

true

September 3, 2024

March 31, 2025

209 days

131,995

Summary of Significant Accounting Policies (Policies)	9 Months Ended
Summary of Significant Accounting Policies (Policies)	Sep. 30, 2024
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation The Company’s unaudited condensed consolidated financial statements have been prepared in accordance with the requirements of the U.S. Securities and Exchange Commission (SEC) for interim financial information. As permitted under Generally Accepted Accounting Principles in the United States (U.S. GAAP), certain notes and other information have been omitted from the interim unaudited condensed consolidated financial statements presented in this Quarterly Report on Form 10-Q. Therefore, these unaudited condensed consolidated financial statements should be read in conjunction with the Company’s most recent Annual Report on Form 10-K, for the year ended December 31, 2023, filed with the SEC. In management’s opinion, the unaudited condensed consolidated financial statements include all normal and recurring adjustments necessary for a fair presentation of the Company’s financial position, results of operations, and cash flows. The results of operations for any interim period are not necessarily indicative of the Company’s future quarterly or annual results. The Company, which is primarily located in the U.S., operates in one operating segment.
Reclassifications	Reclassifications The prior year amount related to the caption Employee taxes paid related to net share settlement of equity awards in the condensed consolidated statements of cash flows has been reclassified to conform to current year presentation. The reclassification did not affect the other condensed consolidated financial statements.
Consolidation	Consolidation The Company's unaudited condensed consolidated financial statements include the accounts of Supernus Pharmaceuticals, Inc. and its wholly owned subsidiaries. These are collectively referred to herein as "Supernus" or "the Company." Supernus Pharmaceuticals, Inc. and each of its subsidiaries are distinct legal entities. All material intercompany transactions and balances have been eliminated in consolidation. The unaudited condensed consolidated financial statements reflect the consolidation of entities in which the Company has a controlling financial interest. In determining whether there is a controlling financial interest, the Company considers if it has a majority of the voting interests of the entity, or if the entity is a variable interest entity (VIE) and if the Company is the primary beneficiary. In determining the primary beneficiary of a VIE, the Company evaluates whether it has both: the power to direct the activities of the VIE that most significantly impact the VIE's economic performance; and the obligation to absorb losses of, or the right to receive benefits from the VIE that could potentially be significant to that VIE. The Company's judgment with respect to its level of influence or control of an entity involves the consideration of various factors, including the form of an ownership interest; representation in the entity's governance; the size of the investment; estimates of future cash flows; the ability to participate in policymaking decisions; and the rights of the other investors to participate in the decision making process, including the right to liquidate the entity, if applicable. If the Company is not the primary beneficiary of the VIE, and an ownership interest is maintained in the entity, the interest is accounted for under the equity or cost methods of accounting, as appropriate. The Company continuously assesses whether it is the primary beneficiary of a VIE as changes to existing relationships or future transactions may affect its conclusions.
Use of Estimates	Use of Estimates The Company bases its estimates on: historical experience; forecasts; information received from its service providers; information from other sources, including public and proprietary sources; and other assumptions that the Company believes are reasonable under the circumstances. Actual results could differ materially from the Company’s estimates. The Company periodically evaluates the methodologies employed in making its estimates.
Advertising Expense	Advertising Expense Advertising expense includes the cost of promotional materials and activities, such as printed materials and digital marketing, marketing programs and speaker programs. The cost of the Company's advertising efforts is expensed as incurred.
Insurance Recoveries	Insurance Recoveries The Company has several policies with third-party insurers that provide for the recovery of certain costs incurred by the Company. The Company records our rights to insurance recoveries as a receivable when the respective costs are reimbursable under applicable insurance policies, it is probable that such costs will be reimbursed, and reimbursement can be reasonably estimated. As such, the Company estimates the percentage of costs that will be reimbursed by the insurance provider to determine the proper amount to record for the insurance recovery receivable.
Recently Issued Accounting Pronouncements and Disclosure Rules	Recently Issued Accounting Pronouncements and Disclosure Rules New Accounting Pronouncements Not Yet Adopted Accounting Standards Update (ASU) 2023-07, Improvements to Reportable Segment Disclosures (Topic 280) - The new standard, issued in November 2023, improves reportable segment disclosure requirements, primarily through enhanced disclosures about significant segment expenses that are regularly provided to the chief operating decision maker. ASU 2023-07 also clarifies that entities with a single reportable segment are subject to both new and existing reporting requirements under Topic 280. The standard is effective for fiscal years beginning after December 15, 2023, and interim periods within fiscal years beginning after December 15, 2024, on a retrospective basis, with early adoption permitted. The Company plans to adopt the guidance for the fiscal year ending December 31, 2024. The Company expects ASU 2023-07 to require additional disclosures in the notes to its consolidated financial statements. The Company is currently evaluating the effects the adoption of this guidance will have on the consolidated financial statements. ASU 2023-09, Improvements to Income Tax Disclosures (Topic 740) - The new standard, issued in December 2023, requires entities to disclose additional information with respect to the effective tax rate reconciliation and to disclose the disaggregation by jurisdiction of income tax expense and income taxes paid. The standard is effective with annual periods beginning after December 15, 2024, with early adoption permitted. The standard is to be applied on a prospective basis, although optional retrospective application is permitted. The Company plans to adopt the guidance for the fiscal year ending December 31, 2025. The Company expects ASU 2023-09 to require additional disclosures in the notes to its consolidated financial statements. The Company is currently evaluating the effects the adoption of this guidance will have on the consolidated financial statements.

Disaggregated Revenues (Tables)

9 Months Ended

Sep. 30, 2024

Disaggregation of Revenue [Abstract]

Schedule of Disaggregation of Revenues

The following table provides information regarding total revenues (dollars in thousands):


	Three Months Ended September 30,				Nine Months Ended September 30,
	2024		2023		2024		2023
	(unaudited)				(unaudited)
Net product sales
Qelbree	$	62,359	$	37,081	$	166,857	$	93,840
GOCOVRI	35,657		32,889		93,922		87,650
Oxtellar XR	29,805		29,644		86,265		82,359
APOKYN	19,867		21,510		53,811		56,324
Trokendi XR	15,318		20,625		48,393		74,734
Other(1)	7,296		7,255		22,053		23,008
Total net product sales	170,302		149,004		471,301		417,915
Royalty, licensing and other revenues	5,387		4,876		16,357		25,292
Total revenues	$	175,689	$	153,880	$	487,658	$	443,207

___________________________________________

(1) Includes net product sales of MYOBLOC, XADAGO and Osmolex ER.

Investments (Tables)

9 Months Ended

Sep. 30, 2024

Investments, Debt and Equity Securities [Abstract]

Schedule of Unrestricted Available-for-Sale Marketable Securities

Unrestricted available-for-sale marketable securities held by the Company are as follows (dollars in thousands):


	September 30, 2024		December 31, 2023
	(unaudited)
Corporate, U.S. government agency and municipal debt securities
Amortized cost	$	371,381	$	197,153
Gross unrealized gains	263		5
Gross unrealized losses	(107)		(721)
Total fair value	$	371,537	$	196,437

Fair Value of Financial Instruments (Tables)

9 Months Ended

Sep. 30, 2024

Fair Value Disclosures [Abstract]

Schedule of Fair Value of the Financial Assets and Liabilities

The Company’s financial assets and liabilities that are required to be measured at fair value on a recurring basis are as follows (dollars in thousands):


	Fair Value Measurements as of September 30, 2024 (unaudited)
	Total		Level 1		Level 2		Level 3
Assets:
Cash and cash equivalents
Cash	$	31,080	$	31,080	$	—	$	—
Money market funds	593		593		—		—
Marketable securities
Corporate, U.S. government agency and municipal debt securities	371,537		—		371,537		—


Other noncurrent assets
Marketable securities - restricted (SERP)	635		19		616		—
Total assets at fair value	$	403,845	$	31,692	$	372,153	$	—
Liabilities:
Contingent consideration	$	46,984	$	—	$	—	$	46,984
Total liabilities at fair value	$	46,984	$	—	$	—	$	46,984


	Fair Value Measurements as of December 31, 2023
	Total		Level 1		Level 2		Level 3
Assets:
Cash and cash equivalents
Cash	$	35,957	$	35,957	$	—	$	—
Money market funds	39,097		39,097		—		—
Marketable securities
Corporate, U.S. government agency and municipal debt securities	179,820		—		179,820		—
Long-term marketable securities
Corporate and municipal debt securities	16,617		—		16,617		—
Other noncurrent assets
Marketable securities - restricted (SERP)	568		16		552		—
Total assets at fair value	$	272,059	$	75,070	$	196,989	$	—
Liabilities:
Contingent consideration	$	53,450	$	—	$	—	$	53,450
Total liabilities at fair value	$	53,450	$	—	$	—	$	53,450

Contingent Consideration (Tables)

9 Months Ended

Sep. 30, 2024

Business Combination, Asset Acquisition, and Joint Venture Formation [Abstract]

Schedule of Business Acquisitions by Acquisition, Contingent Consideration

The following table provides the current and long-term portions related to the contingent consideration for the USWM Acquisition and Adamas Acquisition (as defined below) (dollars in thousands):


	September 30, 2024		December 31, 2023
Reported under the following captions in the condensed consolidated balance sheets:	(unaudited)
Contingent consideration, current portion	$	46,581	$	52,070
Contingent consideration, long-term	403		1,380
Total	$	46,984	$	53,450

Schedule of Reconciliation of the Beginning and Ending Balances Related to the Contingent Consideration

The following tables provide a reconciliation of the beginning and ending balances related to the contingent consideration for the USWM Acquisition and Adamas Acquisition (dollars in thousands):


	USWM Acquisition		Adamas Acquisition		Total
Balance at December 31, 2023	$	46,400	$	7,050	$	53,450
Change in fair value recognized in earnings	130		(6,596)		(6,466)
Balance at September 30, 2024 (unaudited)	$	46,530	$	454	$	46,984


	USWM Acquisition		Adamas Acquisition		Total
Balance at December 31, 2022	$	46,270	$	8,697	$	54,967
Change in fair value recognized in earnings	(390)		(923)		(1,313)
Balance at September 30, 2023 (unaudited)	$	45,880	$	7,774	$	53,654

Intangible Assets, Net (Tables)

9 Months Ended

Sep. 30, 2024

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Intangible Assets

The following table sets forth the gross carrying amounts and related accumulated amortization of intangible assets (dollars in thousands):


	September 30, 2024							December 31, 2023
	(unaudited)
	Remaining Weighted Average Life (Years)	Carrying Amount, Gross		Accumulated Amortization		Carrying Amount, Net		Carrying Amount, Gross		Accumulated Amortization		Carrying Amount, Net
Acquired in-process research and development		$	124,000	$	—	$	124,000	$	124,000	$	—	$	124,000
Intangible assets subject to amortization:
Acquired developed technology and product rights	6.15	661,311		(245,155)		416,156		661,311		(190,395)		470,916
Capitalized patent defense costs	0.00	43,820		(43,820)		—		43,820		(38,847)		4,973
Total intangible assets	6.15	$	829,131	$	(288,975)	$	540,156	$	829,131	$	(229,242)	$	599,889

Share-Based Payments (Tables)

9 Months Ended

Sep. 30, 2024

Share-Based Payment Arrangement [Abstract]

Schedule of Share-Based Compensation Expense

Share-based compensation expense is as follows (dollars in thousands):


	Three Months Ended September 30,				Nine Months Ended September 30,
	2024		2023		2024		2023
	(unaudited)				(unaudited)
Research and development	$	1,350	$	1,254	$	3,946	$	3,458
Selling, general and administrative	6,324		6,666		16,177		16,856
Total	$	7,674	$	7,920	$	20,123	$	20,314

Schedule of Stock Options

The following table summarizes stock option activities:


	Number of Options	Weighted Average Exercise Price		Weighted Average Remaining Contractual Term (in years)
Outstanding, December 31, 2023	6,583,822	$	29.20	5.90
Granted	1,171,612	$	28.05
Exercised	(336,868)	$	20.23
Forfeited	(251,657)	$	31.71
Outstanding, September 30, 2024 (unaudited)	7,166,909	$	29.34	5.87

As of September 30, 2024 (unaudited):
Vested and expected to vest	7,166,909	$	29.34	5.87
Exercisable	4,560,609	$	27.95	4.33

As of December 31, 2023:
Vested and expected to vest	6,583,822	$	29.20	5.90
Exercisable	4,110,537	$	26.58	4.43

Schedule of Restricted Stock Units

The following table summarizes restricted stock unit (RSU) activities:


	Number of RSUs	Weighted Average Grant Date Fair Value per Share
Nonvested, December 31, 2023	300,141	$	36.90
Granted	198,414	$	28.06
Vested	(100,891)	$	36.51
Forfeited	(19,124)	$	34.64
Nonvested, September 30, 2024 (unaudited)	378,540	$	32.48

Schedule of Performance Stock Unit

The following table summarizes performance share unit (PSU) activities:


	Performance-Based Units			Market-Based Units			Total PSUs
	Number of PSUs	Weighted Average Grant Date Fair Value per Share		Number of PSUs	Weighted Average Grant Date Fair Value per Share		Number of PSUs	Weighted Average Grant Date Fair Value per Share
Nonvested, December 31, 2023	251,630	$	32.22	20,000	$	28.63	271,630	$	31.96
Granted	252,700	$	26.91	—	$	—	252,700	$	26.91
Vested	(62,980)	$	33.67	—	$	—	(62,980)	$	33.67
Forfeited	(58,050)	$	29.37	—	$	—	(58,050)	$	29.37
Nonvested, September 30, 2024 (unaudited)	383,300	$	28.91	20,000	$	28.63	403,300	$	28.90

Earnings (Loss) per Share (Tables)

9 Months Ended

Sep. 30, 2024

Earnings Per Share [Abstract]

Schedule of Computation of Basic and Diluted Earnings Per Share


	Three Months Ended September 30,				Nine Months Ended September 30,
	2024		2023		2024		2023
	(unaudited)				(unaudited)
Numerator:
Net earnings (loss)	$	38,497	$	(15,976)	$	58,537	$	141
Denominator:
Weighted average shares outstanding, basic	55,149,760		54,608,963		54,977,199		54,498,687
Effect of dilutive securities:
Stock options and stock awards	866,590		—		813,986		1,076,235
Weighted average shares outstanding, diluted	56,016,350		54,608,963		55,791,185		55,574,922

Earnings (loss) per share, basic	$	0.70	$	(0.29)	$	1.06	$	0.00
Earnings (loss) per share, diluted	$	0.69	$	(0.29)	$	1.05	$	0.00

Schedule of Common Stock Equivalents Excluded in the Calculation of Diluted Earnings Per Share

would be anti-dilutive:


	Three Months Ended September 30,		Nine Months Ended September 30,
	2024	2023	2024	2023
	(unaudited)		(unaudited)
2023 Notes	—	—	—	2,261,312
Stock options and stock awards	712,457	411,506	772,255	486,080

Income Tax Expense (Tables)

9 Months Ended

Sep. 30, 2024

Income Tax Disclosure [Abstract]

Schedule of Effective Income Tax Rate Reconciliation

The following table provides information regarding the Company’s income tax expense for the three and nine months ended September 30, 2024 and 2023 (dollars in thousands):


	Three Months Ended September 30,						Nine Months Ended September 30,
	2024			2023			2024			2023
	(unaudited)						(unaudited)
Income tax expense	$	6,446		$	25,865		$	12,951		$	1,638
Effective tax rate	14.3		%	261.6		%	18.1		%	92.1		%

Leases (Tables)

9 Months Ended

Sep. 30, 2024

Leases [Abstract]

Schedule of Balance Sheet Information Related to Leases

Operating lease assets and lease liabilities as reported on the condensed consolidated balance sheets are as follows (dollars in thousands):


	Balance Sheet Classification	September 30, 2024		December 31, 2023
		(unaudited)
Assets
Operating lease assets	Other assets	$	26,086	$	28,994
Total lease assets		$	26,086	$	28,994

Liabilities
Operating lease liabilities, current portion	Accounts payable and accrued liabilities	$	9,227	$	8,331
Operating lease liabilities, long-term	Operating lease liabilities, long-term	28,926		33,196
Total lease liabilities		$	38,153	$	41,527

Composition of Other Balance Sheet Items (Tables)

9 Months Ended

Sep. 30, 2024

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Schedule of Inventories

Inventories, Net


	September 30, 2024		December 31, 2023
	(unaudited)
Raw materials	$	11,571	$	16,274
Work in process	28,102		31,212
Finished goods	24,308		29,922
Total	$	63,981	$	77,408

Schedule of Property and Equipment

Property and Equipment, Net


	September 30, 2024		December 31, 2023
	(unaudited)
Lab equipment and furniture	$	13,174	$	13,069
Leasehold improvements	14,023		14,023
Software	883		883
Computer equipment	1,037		960
	29,117		28,935
Less accumulated depreciation and amortization	(17,241)		(15,405)
Property and equipment, net	$	11,876	$	13,530

Schedule of Accrued Expenses and Other Current Liabilities

Accounts Payable and Accrued Liabilities


	September 30, 2024		December 31, 2023
	(unaudited)
Accounts payable	$	6,392	$	1,964
Accrued compensation, benefits, & related accruals	20,284		20,722
Accrued sales & marketing	10,466		11,666
Accrued manufacturing expenses	5,573		11,652
Accrued R&D expenses	7,911		10,530
Operating lease liabilities, current portion (1)	9,227		8,331
Accrued royalties (2)	7,849		7,918
Other accrued expenses	8,101		6,786
Total	$	75,803	$	79,569

_______________________________

(1) Refer to Note 12, Leases.

(2) Refer to Note 14, Commitments and Contingencies.

Schedule of Accrued Product Returns and Rebates

Accrued Product Returns and Rebates


	September 30, 2024		December 31, 2023
	(unaudited)
Accrued product rebates	$	111,695	$	96,984
Accrued product returns	57,429		57,290
Total	$	169,124	$	154,274

Business Organization (Details)	9 Months Ended
Business Organization (Details)	Sep. 30, 2024 product
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of commercial products	7

Summary of Significant Accounting Policies - Basis of Presentation (Details)	9 Months Ended
	Sep. 30, 2024 segment
Accounting Policies [Abstract]
Number of operating segments	1

Summary of Significant Accounting Policies - Advertising Expense (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Accounting Policies [Abstract]
Advertising expense	$ 19.6	$ 25.1	$ 67.5	$ 76.9

Summary of Significant Accounting Policies - Insurance Recoveries (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Accounting Policies [Abstract]
Insurance recoveries	$ 11.5	$ 0.0	$ 12.0	$ 0.0

Disaggregated Revenues - Disaggregation of Revenues (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Disaggregation of Revenue [Line Items]
Total revenues	$ 175,689	$ 153,880	$ 487,658	$ 443,207
Net product sales
Disaggregation of Revenue [Line Items]
Total revenues	170,302	149,004	471,301	417,915
Qelbree
Disaggregation of Revenue [Line Items]
Total revenues	62,359	37,081	166,857	93,840
GOCOVRI
Disaggregation of Revenue [Line Items]
Total revenues	35,657	32,889	93,922	87,650
Oxtellar XR
Disaggregation of Revenue [Line Items]
Total revenues	29,805	29,644	86,265	82,359
APOKYN
Disaggregation of Revenue [Line Items]
Total revenues	19,867	21,510	53,811	56,324
Trokendi XR
Disaggregation of Revenue [Line Items]
Total revenues	15,318	20,625	48,393	74,734
Other
Disaggregation of Revenue [Line Items]
Total revenues	7,296	7,255	22,053	23,008
Royalty, licensing and other revenues
Disaggregation of Revenue [Line Items]
Total revenues	$ 5,387	$ 4,876	$ 16,357	$ 25,292

Disaggregated Revenues - Narrative (Details) $ in Millions	9 Months Ended
Disaggregated Revenues - Narrative (Details) $ in Millions	Sep. 30, 2023 USD ($)
Disaggregation of Revenue [Abstract]
Non-cash royalty revenue	$ 4.0

Investments - Unrestricted Marketable Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Investments, Debt and Equity Securities [Abstract]
Amortized cost	$ 371,381	$ 197,153
Gross unrealized gains	263	5
Gross unrealized losses	(107)	(721)
Total fair value	$ 371,537	$ 196,437

Investments - Narrative (Details)	9 Months Ended
Investments - Narrative (Details)	Sep. 30, 2024 USD ($)
Investments, Debt and Equity Securities [Abstract]
Impairment due to credit losses	$ 0

Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Marketable securities
Corporate, U.S. government agency and municipal debt securities	$ 371,537	$ 179,820
Long-term marketable securities
Corporate and municipal debt securities	0	16,617
Liabilities:
Contingent consideration	46,984	53,450
Recurring
Other noncurrent assets
Marketable securities - restricted (SERP)	635	568
Total assets at fair value	403,845	272,059
Liabilities:
Contingent consideration	46,984	53,450
Total liabilities at fair value	46,984	53,450
Recurring \| Corporate, U.S. government agency and municipal debt securities
Marketable securities
Corporate, U.S. government agency and municipal debt securities	371,537	179,820
Recurring \| Corporate and municipal debt securities
Long-term marketable securities
Corporate and municipal debt securities		16,617
Recurring \| Cash
Cash and cash equivalents
Cash and Money market funds	31,080	35,957
Recurring \| Money market funds
Cash and cash equivalents
Cash and Money market funds	593	39,097
Recurring \| Level 1
Other noncurrent assets
Marketable securities - restricted (SERP)	19	16
Total assets at fair value	31,692	75,070
Liabilities:
Contingent consideration	0	0
Total liabilities at fair value	0	0
Recurring \| Level 1 \| Corporate, U.S. government agency and municipal debt securities
Marketable securities
Corporate, U.S. government agency and municipal debt securities	0	0
Recurring \| Level 1 \| Corporate and municipal debt securities
Long-term marketable securities
Corporate and municipal debt securities		0
Recurring \| Level 1 \| Cash
Cash and cash equivalents
Cash and Money market funds	31,080	35,957
Recurring \| Level 1 \| Money market funds
Cash and cash equivalents
Cash and Money market funds	593	39,097
Recurring \| Level 2
Other noncurrent assets
Marketable securities - restricted (SERP)	616	552
Total assets at fair value	372,153	196,989
Liabilities:
Contingent consideration	0	0
Total liabilities at fair value	0	0
Recurring \| Level 2 \| Corporate, U.S. government agency and municipal debt securities
Marketable securities
Corporate, U.S. government agency and municipal debt securities	371,537	179,820
Recurring \| Level 2 \| Corporate and municipal debt securities
Long-term marketable securities
Corporate and municipal debt securities		16,617
Recurring \| Level 2 \| Cash
Cash and cash equivalents
Cash and Money market funds	0	0
Recurring \| Level 2 \| Money market funds
Cash and cash equivalents
Cash and Money market funds	0	0
Recurring \| Level 3
Other noncurrent assets
Marketable securities - restricted (SERP)	0	0
Total assets at fair value	0	0
Liabilities:
Contingent consideration	46,984	53,450
Total liabilities at fair value	46,984	53,450
Recurring \| Level 3 \| Corporate, U.S. government agency and municipal debt securities
Marketable securities
Corporate, U.S. government agency and municipal debt securities	0	0
Recurring \| Level 3 \| Corporate and municipal debt securities
Long-term marketable securities
Corporate and municipal debt securities		0
Recurring \| Level 3 \| Cash
Cash and cash equivalents
Cash and Money market funds	0	0
Recurring \| Level 3 \| Money market funds
Cash and cash equivalents
Cash and Money market funds	$ 0	$ 0

Contingent Consideration - Current and Long-Term Contingent Consideration (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Business Combination, Asset Acquisition, and Joint Venture Formation [Abstract]
Contingent consideration, current portion	$ 46,581	$ 52,070
Contingent consideration, long-term	403	1,380
Contingent consideration	$ 46,984	$ 53,450

Contingent Consideration - Narrative (Details) $ / shares in Units, $ in Thousands		3 Months Ended		9 Months Ended
	Nov. 24, 2021 USD ($) right $ / shares	Sep. 30, 2024 USD ($)	Sep. 30, 2023 USD ($)	Sep. 30, 2024 USD ($)	Sep. 30, 2023 USD ($)
Business Acquisition [Line Items]
Fair value gain (loss) recognized in earnings				$ 6,466	$ 1,313
USWM Acquisition
Business Acquisition [Line Items]
Additional cash payments upon milestone achievements maximum		$ 55,000		55,000
Fair value gain (loss) recognized in earnings		(1,300)	$ (700)	(130)	390
USWM Acquisition \| SPN-830 NDA Approval Milestone
Business Acquisition [Line Items]
Additional cash payments upon milestone achievements maximum		25,000		25,000
USWM Acquisition \| Subsequent Commercial Product Launch
Business Acquisition [Line Items]
Additional cash payments upon milestone achievements maximum		30,000		30,000
Adamas Acquisition
Business Acquisition [Line Items]
Additional cash payments upon milestone achievements maximum	$ 50,900
Contingents value rights \| right	2
Contingent consideration arrangements, value (in dollars per share) \| $ / shares	$ 0.50
Additional cash payments upon milestone achievements minimum	$ 0
Fair value gain (loss) recognized in earnings		$ 2,300	$ 1,100	$ 6,596	$ 923
Adamas Acquisition \| The Milestones
Business Acquisition [Line Items]
Contingent consideration arrangements, excess acquisition date fair value	$ 225,000
Contingent consideration arrangements, excess acquisition date fair value, term	12 months
Adamas Acquisition \| Milestone 2024
Business Acquisition [Line Items]
Contingent consideration arrangements, excess acquisition date fair value	$ 150,000
Contingent consideration arrangements, excess acquisition date fair value, term	12 months

Contingent Consideration - Reconciliation of the Beginning and Ending Balances Related to the Contingent Consideration (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Balance at beginning of period			$ 53,450	$ 54,967
Change in fair value recognized in earnings			(6,466)	(1,313)
Balance at end of period	$ 46,984	$ 53,654	46,984	53,654
USWM Acquisition
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Balance at beginning of period			46,400	46,270
Change in fair value recognized in earnings	1,300	700	130	(390)
Balance at end of period	46,530	45,880	46,530	45,880
Adamas Acquisition
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Balance at beginning of period			7,050	8,697
Change in fair value recognized in earnings	(2,300)	(1,100)	(6,596)	(923)
Balance at end of period	$ 454	$ 7,774	$ 454	$ 7,774

Intangible Assets, Net - Intangible Assets Gross Carrying Amount and Related Accumulated Amortization (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Finite-Lived Intangible Assets [Line Items]
Remaining Weighted Average Life (Years)	6 years 1 month 24 days
Accumulated Amortization	$ (288,975)	$ (229,242)
Total intangible assets, carrying amount, gross	829,131	829,131
Intangible assets, net	540,156	599,889
Acquired in-process research and development
Indefinite-lived Intangible Assets [Line Items]
Acquired in-process research and development	$ 124,000	124,000
Acquired developed technology and product rights
Finite-Lived Intangible Assets [Line Items]
Remaining Weighted Average Life (Years)	6 years 1 month 24 days
Carrying Amount, Gross	$ 661,311	661,311
Accumulated Amortization	(245,155)	(190,395)
Carrying Amount, Net	$ 416,156	470,916
Capitalized patent defense costs
Finite-Lived Intangible Assets [Line Items]
Remaining Weighted Average Life (Years)	0 years
Carrying Amount, Gross	$ 43,820	43,820
Accumulated Amortization	(43,820)	(38,847)
Carrying Amount, Net	$ 0	$ 4,973

Intangible Assets, Net - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Goodwill and Intangible Assets Disclosure [Abstract]
Amortization of intangible assets	$ 19,488	$ 21,242	$ 59,733	$ 61,316

Debt (Details) - USD ($)	3 Months Ended
Debt (Details) - USD ($)	Jun. 30, 2023	Sep. 30, 2024	Mar. 30, 2023	Feb. 08, 2023
2023 Notes
Notes payable
Debt instrument, interest rate, stated percentage			0.625%
Uncommitted Secured Credit Line \| Line of Credit
Notes payable
Line of credit facility, maximum borrowing capacity				$ 150,000,000
Debt instrument, face amount			$ 93,000,000.0
Revolving Credit Facility \| Line of Credit
Notes payable
Interest expense	$ 700,000
Short-term debt		$ 0

Share-Based Payments - Narratives (Details)	Jun. 14, 2024 shares
2021 Equity Incentive Plan
Share-Based Payments
Share-based compensation arrangement by share-based payment award, number of additional shares authorized	4,000,000

Share-Based Payments - Share-based Compensation Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Share-based payments
Share-based compensation expense	$ 7,674	$ 7,920	$ 20,123	$ 20,314
Research and development
Share-based payments
Share-based compensation expense	1,350	1,254	3,946	3,458
Selling, general and administrative
Share-based payments
Share-based compensation expense	$ 6,324	$ 6,666	$ 16,177	$ 16,856

Share-Based Payments - Stock Option (Details) - $ / shares	9 Months Ended	12 Months Ended
	Sep. 30, 2024	Dec. 31, 2023
Number of Options
Outstanding at the beginning of the period (in shares)	6,583,822
Granted (in shares)	1,171,612
Exercised (in shares)	(336,868)
Forfeited (in shares)	(251,657)
Outstanding at the end of the period (in shares)	7,166,909	6,583,822
Vested and expected to vest (in shares)	7,166,909	6,583,822
Exercisable (in shares)	4,560,609	4,110,537
Weighted Average Exercise Price
Outstanding at the beginning of the period (in dollars per share)	$ 29.20
Granted (in dollars per share)	28.05
Exercised (in dollars per share)	20.23
Forfeited (in dollars per share)	31.71
Outstanding at the end of the period (in dollars per share)	29.34	$ 29.20
Vested and expected to vest (in dollars per share)	29.34	29.20
Exercisable (in dollars per share)	$ 27.95	$ 26.58
Weighted Average Remaining Contractual Term (in years)
Outstanding at the end of the period	5 years 10 months 13 days	5 years 10 months 24 days
Vested and expected to vest	5 years 10 months 13 days	5 years 10 months 24 days
Exercisable	4 years 3 months 29 days	4 years 5 months 4 days

Share-Based Payments - Restricted Stock Units (Details) - RSUs	9 Months Ended
	Sep. 30, 2024 $ / shares shares
Number of RSUs
Nonvested, beginning balance (in shares) \| shares	300,141
Granted (in shares) \| shares	198,414
Vested (in shares) \| shares	(100,891)
Forfeited (in shares) \| shares	(19,124)
Nonvested, ending balance (in shares) \| shares	378,540
Weighted Average Grant Date Fair Value per Share
Nonvested, beginning balance (in dollars per share) \| $ / shares	$ 36.90
Granted (in dollars per share) \| $ / shares	28.06
Vested (in dollars per share) \| $ / shares	36.51
Forfeited (in dollars per share) \| $ / shares	34.64
Nonvested, ending balance (in dollars per share) \| $ / shares	$ 32.48

Share-Based Payments - Performance Stock Units (Details)	9 Months Ended
	Sep. 30, 2024 $ / shares shares
Total PSUs
Number of PSUs
Nonvested, beginning balance (in shares) \| shares	271,630
Granted (in shares) \| shares	252,700
Vested (in shares) \| shares	(62,980)
Forfeited (in shares) \| shares	(58,050)
Nonvested, ending balance (in shares) \| shares	403,300
Weighted Average Grant Date Fair Value per Share
Nonvested, beginning balance (in dollars per share) \| $ / shares	$ 31.96
Granted (in dollars per share) \| $ / shares	26.91
Vested (in dollars per share) \| $ / shares	33.67
Forfeited (in dollars per share) \| $ / shares	29.37
Nonvested, ending balance (in dollars per share) \| $ / shares	$ 28.90
Performance-Based Units
Number of PSUs
Nonvested, beginning balance (in shares) \| shares	251,630
Granted (in shares) \| shares	252,700
Vested (in shares) \| shares	(62,980)
Forfeited (in shares) \| shares	(58,050)
Nonvested, ending balance (in shares) \| shares	383,300
Weighted Average Grant Date Fair Value per Share
Nonvested, beginning balance (in dollars per share) \| $ / shares	$ 32.22
Granted (in dollars per share) \| $ / shares	26.91
Vested (in dollars per share) \| $ / shares	33.67
Forfeited (in dollars per share) \| $ / shares	29.37
Nonvested, ending balance (in dollars per share) \| $ / shares	$ 28.91
Market-Based Units
Number of PSUs
Nonvested, beginning balance (in shares) \| shares	20,000
Granted (in shares) \| shares	0
Vested (in shares) \| shares	0
Forfeited (in shares) \| shares	0
Nonvested, ending balance (in shares) \| shares	20,000
Weighted Average Grant Date Fair Value per Share
Nonvested, beginning balance (in dollars per share) \| $ / shares	$ 28.63
Granted (in dollars per share) \| $ / shares	0
Vested (in dollars per share) \| $ / shares	0
Forfeited (in dollars per share) \| $ / shares	0
Nonvested, ending balance (in dollars per share) \| $ / shares	$ 28.63

Earnings (Loss) per Share - Schedule of Computation of Basic and Diluted Earnings per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2024	Sep. 30, 2023
Numerator:
Net earnings (loss)	$ 38,497	$ 19,916	$ 124	$ (15,976)	$ (831)	$ 16,948	$ 58,537	$ 141
Denominator:
Weighted average shares outstanding, basic (in shares)	55,149,760			54,608,963			54,977,199	54,498,687
Effect of dilutive securities:
Stock options and stock awards (in shares)	866,590			0			813,986	1,076,235
Weighted average shares outstanding, diluted (in shares)	56,016,350			54,608,963			55,791,185	55,574,922
Earnings (loss) per share, basic (in dollars per share)	$ 0.70			$ (0.29)			$ 1.06	$ 0.00
Earnings (loss) per share, diluted (in dollars per share)	$ 0.69			$ (0.29)			$ 1.05	$ 0.00

Earnings (Loss) per Share - Schedule of Common Stock Equivalents Excluded in the Calculation of Diluted Earnings per Share (Details) - shares	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
2023 Notes
Income per share
Common stock equivalents excluded in the calculation of diluted income per share (in shares)	0	0	0	2,261,312
Stock options and stock awards
Income per share
Common stock equivalents excluded in the calculation of diluted income per share (in shares)	712,457	411,506	772,255	486,080

Income Tax Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
Income Tax Expense (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Income Tax Disclosure [Abstract]
Income tax expense	$ 6,446	$ 25,865	$ 12,951	$ 1,638
Effective tax rate	14.30%	261.60%	18.10%	92.10%

Leases (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Assets
Operating lease assets	$ 26,086	$ 28,994
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	Other assets	Other assets
Liabilities
Operating lease liabilities, current portion	$ 9,227	$ 8,331
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	Accounts payable and accrued liabilities	Accounts payable and accrued liabilities
Operating lease liabilities, long-term	$ 28,926	$ 33,196
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	Operating lease liabilities, long-term	Operating lease liabilities, long-term
Total lease liabilities	$ 38,153	$ 41,527

Composition of Other Balance Sheet Items - Inventories (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Raw materials	$ 11,571	$ 16,274
Work in process	28,102	31,212
Finished goods	24,308	29,922
Total	$ 63,981	$ 77,408

Composition of Other Balance Sheet Items - Property and Equipment (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Property and equipment
Property and equipment, gross	$ 29,117		$ 29,117		$ 28,935
Less accumulated depreciation and amortization	(17,241)		(17,241)		(15,405)
Property and equipment, net	11,876		11,876		13,530
Depreciation and amortization expense	600	$ 600	1,800	$ 1,900
Lab equipment and furniture
Property and equipment
Property and equipment, gross	13,174		13,174		13,069
Leasehold improvements
Property and equipment
Property and equipment, gross	14,023		14,023		14,023
Software
Property and equipment
Property and equipment, gross	883		883		883
Computer equipment
Property and equipment
Property and equipment, gross	$ 1,037		$ 1,037		$ 960

Composition of Other Balance Sheet Items - Accrued Payable and Accrued Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Accounts payable	$ 6,392	$ 1,964
Accrued compensation, benefits, & related accruals	20,284	20,722
Accrued sales & marketing	10,466	11,666
Accrued manufacturing expenses	5,573	11,652
Accrued R&D expenses	7,911	10,530
Operating lease liabilities, current portion	9,227	8,331
Accrued royalties	7,849	7,918
Other accrued expenses	8,101	6,786
Total	$ 75,803	$ 79,569

Composition of Other Balance Sheet Items - Accrued Product Returns and Rebates (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Accrued product rebates	$ 111,695	$ 96,984
Accrued product returns	57,429	57,290
Total	$ 169,124	$ 154,274

Commitments and Contingencies (Details) € in Millions, $ in Millions		1 Months Ended
	Apr. 01, 2019 USD ($)	Apr. 30, 2020 USD ($)	Sep. 30, 2024 EUR (€)
Navitor Pharmaceuticals, Inc.
Long-term Purchase Commitment [Line Items]
Collaborative arrangement agreement termination notice period		30 days
Threshold for development costs payments		$ 50.0
Collaborative arrangement, payment for one time fee		10.0
Collaborative arrangement, upfront development costs		25.0
Navitor Pharmaceuticals, Inc. \| Minimum
Long-term Purchase Commitment [Line Items]
Collaborative arrangement, expected development costs		410.0
Navitor Pharmaceuticals, Inc. \| Maximum
Long-term Purchase Commitment [Line Items]
Collaborative arrangement, expected development costs		475.0
Navitor Pharmaceuticals, Inc. \| Variable Interest Entity, Not Primary Beneficiary
Long-term Purchase Commitment [Line Items]
Investments		$ 15.0
VIE, qualitative or quantitative information, ownership percentage		13.00%
NAMENDA XR/Namzaric Qui Tam Litigation
Long-term Purchase Commitment [Line Items]
Loss contingency, damages sought, value	$ 2,500.0
USWM Acquisition
Long-term Purchase Commitment [Line Items]
Annual minimum purchase quantity requirement amount \| €			€ 3.9
Litigation settlement	$ 17.5

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