BOLD Boundless Bio Inc

 

UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D.C. 20549

 

FORM 8-K

 

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): November 07, 2024

 

 

Boundless Bio, Inc.

(Exact Name of Registrant as Specified in Its Charter)

 

 

Delaware			001-41989	83-0751369
(State or Other Jurisdiction of Incorporation)			(Commission File Number)	(IRS Employer Identification No.)
9880 Campus Point Drive, Suite 120,
San Diego, California				92121
(Address of Principal Executive Offices)				(Zip Code)

 

Registrant’s Telephone Number, Including Area Code: (858) 766-9912

 

N/A

(Former Name or Former Address, if Changed Since Last Report)

 

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

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

Title of each class		Trading Symbol(s)		Name of each exchange on which registered
Common Stock, par value $0.0001 per share		BOLD		Nasdaq Global Select Market

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§ 230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§ 240.12b-2 of this chapter).

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. ☐

 

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Item 2.02 Results of Operations and Financial Condition.

On November 7, 2024, Boundless Bio, Inc. (the Company) issued a press release announcing its financial results for the quarter ended September 30, 2024. A copy of the press release is attached hereto as Exhibit 99.1 and is incorporated herein by reference.

 

In accordance with General Instruction B.2 of Form 8-K, the information in this Current Report on Form 8-K, including Exhibit 99.1, shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the Exchange Act), or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended (the Securities Act), or the Exchange Act, whether made before or after the date hereof and regardless of any general incorporation by reference language in any such filing, unless the Company specifically states in such filing that such information, or a portion thereof, is to be considered “filed” rather than furnished or incorporated by reference therein.

Item 9.01 Financial Statements and Exhibits.

(d) Exhibits.

 

Exhibit Number		Description
99.1		Press Release Issued on November 7, 2024
104		Cover Page Interactive Data File (embedded within the Inline XBRL document)

 

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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 hereunto duly authorized.

			BOUNDLESS BIO, INC.
Date:	November 7, 2024	By:	/s/ Jessica Oien
			Name: Jessica Oien Title: Chief Legal Officer and Corporate Secretary

 

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Boundless Bio Reports Third Quarter 2024 Financial Results and Business Highlights

 

Enrollment progressing in BBI-355 POTENTIATE and BBI-825 STARMAP clinical trials, with initial proof-of-concept data expected in the second half of 2025

 

Cash position of $167 million, with operating runway into the fourth quarter of 2026

 

SAN DIEGO, November 7, 2024 – Boundless Bio (Nasdaq: BOLD), a clinical-stage oncology company interrogating extrachromosomal DNA (ecDNA) biology to deliver transformative therapies to patients with previously intractable oncogene amplified cancers, today provided business updates and reported financial results for the third quarter of 2024.

“The third quarter was marked by steady execution across the portfolio, with the POTENTIATE and STARMAP trials continuing to enroll patients,” said Zachary Hornby, President and Chief Executive Officer of Boundless Bio. "In September, together with our development partner, SOPHiA GENETICS, we presented analytical validation for our proprietary ecDNA diagnostic, ECHO, a critical first step in identifying ecDNA positive patients for our clinical programs. We are capitalized to advance our lead programs through proof-of-concept data and remain focused on delivering impactful results for our patients and stakeholders.”

Program Highlights and Upcoming Milestones

 

BBI-355, a novel, oral, potent, selective CHK1 inhibitor targeting replication stress for cancer patients with driver oncogene amplifications

 

BBI-825, a novel, oral, potent, selective RNR inhibitor targeting ecDNA assembly and repair for cancer patients with resistance oncogene amplifications

 

ecDTx 3, a novel kinesin program involved in ecDNA segregation

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ECHO, a proprietary diagnostic for detection of ecDNA amplified oncogenes

 

Third Quarter 2024 Financial Results

 

About BBI-355

Boundless Bio’s lead ecDNA-directed therapy (ecDTx), BBI-355, is a novel, oral, selective small molecule inhibitor of checkpoint kinase 1 (CHK1) being studied in the ongoing, first-in-human, Phase 1/2 POTENTIATE clinical trial (NCT05827614) in cancer patients with oncogene amplifications. CHK1 is a master regulator of cells’ response to replication stress (RS). RS is elevated in cancer cells with oncogene amplification, including on ecDNA, and, because of this, represents a key vulnerability of those cells. BBI-355 was designed to exploit the elevated RS in ecDNA-enabled oncogene amplified cancer cells by disrupting proper CHK1 function in regulating RS and thereby facilitating catastrophic RS to preferentially kill cancer cells relative to healthy cells.

 

About BBI-825

Boundless Bio’s second ecDTx, BBI-825, is a novel, oral, selective small molecule inhibitor of ribonucleotide reductase (RNR) being studied in the ongoing, first-in-human, Phase 1/2 STARMAP clinical trial (NCT06299761) in colorectal cancer patients with BRAFV600E or KRASG12C mutations and resistance gene amplifications. In preclinical studies, BBI-825 demonstrated low double digit nanomolar RNR inhibition and tumor growth inhibition, including regressions, in both the prevention and treatment of amplification-mediated resistance in mitogen-activated protein kinase (MAPK) pathway-activated tumors. RNR is the rate-limiting enzyme responsible for cellular de novo synthesis of deoxynucleotide triphosphates (dNTPs), the building blocks of DNA, and is essential to the assembly and repair of ecDNA. BBI-825 was shown to dysregulate ecDNA-reliant cancer cell dNTP pools, deplete ecDNA, and was synthetic lethal in multiple oncogene amplified preclinical cancer models.

 

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About Boundless Bio

Boundless Bio is a clinical-stage oncology company dedicated to unlocking a new paradigm in cancer therapeutics to address the significant unmet need of patients with oncogene amplified tumors by targeting extrachromosomal DNA (ecDNA), a root cause of oncogene amplification observed in more than 14% of cancer patients. Boundless Bio is developing the first ecDNA-directed therapy (ecDTx), BBI-355, which is an oral inhibitor of checkpoint kinase 1 (CHK1) being evaluated in a Phase 1/2 clinical trial in cancer patients with oncogene amplifications. Boundless Bio’s second ecDTx, BBI-825, is an oral inhibitor of ribonucleotide reductase (RNR) being evaluated in a Phase 1/2 clinical trial in colorectal cancer patients with BRAFV600E or KRASG12C mutations and resistance gene amplifications. Leveraging its Spyglass platform, Boundless Bio has an additional program (ecDTx 3) advancing through preclinical development and discovery. Boundless Bio is headquartered in San Diego, CA.

 

For more information, visit www.boundlessbio.com. Follow us on LinkedIn and X.

 

Forward-Looking Statements

Boundless Bio cautions you that statements contained in this press release regarding matters that are not historical facts are forward-looking statements. The forward-looking statements are based on our current beliefs and expectations and include but are not limited to: the potential to achieve catalysts and long-term patient impact; the timing of expected data readouts; the sufficiency of our cash position to fund operations through initial clinical proof-of-concept data readouts and into the fourth quarter of 2026; the potential safety and therapeutic benefits of our ecDTx in treating patients with oncogene amplified cancers; the potential clinical validity and utility of our ecDNA diagnostic ECHO; and the potential for one or more of our ecDTx, if approved, to be the first ecDNA-directed therapy. Actual results may differ from those set forth in this press release due to the risks and uncertainties inherent in our business, including, without limitation: we are early in our development efforts and our approach to discover and develop ecDTx directed against ecDNA in oncogene amplified cancers is novel and unproven; results from preclinical studies or early clinical trials not necessarily being predictive of future results; analytical validation of an ecDNA diagnostic not necessarily being predictive of its clinical validity and utility; potential delays in the commencement, enrollment, data readouts or completion of clinical trials or preclinical studies; our dependence on third parties in connection with clinical trials, preclinical studies, ecDNA diagnostic development, and manufacturing; unfavorable results from clinical trials or preclinical studies; we may expend our limited resources to pursue a particular ecDTx and fail to capitalize on ecDTx with greater development or commercial potential; unexpected adverse side effects or inadequate efficacy of our ecDTx that may limit their development, regulatory approval, and/or commercialization; the potential for our programs and prospects to be negatively impacted by developments relating to our competitors, including the results of studies or regulatory determinations relating to our competitors; regulatory developments in the United States and foreign countries; efforts to streamline operations may not produce the efficiencies expected; we may use our capital resources sooner than we expect; and other risks described in our filings with the Securities and Exchange Commission (SEC), including under the heading “Risk Factors” in our quarterly report on Form 10-Q for the quarter

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ended March 31, 2024 and any subsequent filings with the SEC. You are cautioned not to place undue reliance on these forward-looking statements, which speak only as of the date hereof, and we undertake no obligation to update such statements to reflect events that occur or circumstances that exist after the date hereof. All forward-looking statements are qualified in their entirety by this cautionary statement, which is made under the safe harbor provisions of the Private Securities Litigation Reform Act of 1995.

 

Investor Contacts:

Ben Flaum, Boundless Bio
bflaum@boundlessbio.com

 

Renee Leck, THRUST Strategic Communications
renee@thrustsc.com

 

 

BOUNDLESS BIO, INC.
Condensed Financial Information
(Unaudited)
Condensed Statements of Operations Data:	Three Months Ended September 30								Nine Months Ended September 30
(In thousands, except per share amounts)	2024				2023				2024				2023
Operating expenses:
Research and development	$	14,089			$	11,645			$	41,953			$	32,223
General and administrative		4,626				3,308				13,036				8,777
Total operating expenses		18,715				14,953				54,989				41,000
Loss from operations		(18,715	)			(14,953	)			(54,989	)			(41,000	)
Other income, net:
Interest income		2,174				1,748				5,977				3,662
Other income, net		32				32				97				48
Total other income, net		2,206				1,780				6,074				3,710
Net loss	$	(16,509	)		$	(13,173	)		$	(48,915	)		$	(37,290	)
Net loss per share, basic and diluted	$	(0.74	)		$	(10.71	)		$	(3.22	)		$	(30.89	)
Weighted-average shares used in calculation		22,254				1,230				15,204				1,207
Condensed Balance Sheet Data:									September 30,				December 31,
(In thousands)									2024				2023
Cash, cash equivalents, and short-term investments									$	167,135			$	120,752
Total assets									$	175,093			$	129,894
Total liabilities									$	10,010			$	9,359
Convertible preferred stock									$	-			$	247,617
Accumulated deficit									$	(185,024	)		$	(136,109	)
Total stockholders' equity (deficit)									$	165,083			$	(127,082	)
Working capital (1)									$	160,439			$	114,845
__________
(1) We define working capital as current assets less current liabilities.

 

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v3.24.3

Document And Entity Information	Nov. 07, 2024
Cover [Abstract]
Document Type	8-K
Amendment Flag	false
Document Period End Date	Nov. 07, 2024
Entity Registrant Name	Boundless Bio, Inc.
Entity Central Index Key	0001782303
Entity Emerging Growth Company	true
Entity File Number	001-41989
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	83-0751369
Entity Address, Address Line One	9880 Campus Point Drive, Suite 120,
Entity Address, City or Town	San Diego
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	92121
City Area Code	(858)
Local Phone Number	766-9912
Entity Information, Former Legal or Registered Name	N/A
Written Communications	false
Soliciting Material	false
Pre-commencement Tender Offer	false
Pre-commencement Issuer Tender Offer	false
Entity Ex Transition Period	false
Title of 12(b) Security	Common Stock, par value $0.0001 per share
Trading Symbol	BOLD
Security Exchange Name	NASDAQ

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