UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

 

 

SCHEDULE 13G

(Rule 13d-102)

Information to be Included in Statements Filed Pursuant to Rule 13d-1(b), (c)

and (d) and Amendments Thereto Filed Pursuant to Rule 13d-2.

Under the Securities Exchange Act of 1934

(Amendment No. 1 )*

 

 

iRhythm Technologies Inc.

(Name of Issuer)

Common Stock

(Title of Class of Securities)

450056106

(CUSIP Number)

9/30/2024

(Date of Event Which Requires Filing of this Statement)

 

 

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

 

  ☒

Rule 13d-1(b)

 

  ☐

Rule 13d-1(c)

 

  ☐

Rule 13d-1(d)

 

*

The remainder of this cover page shall be filled out for a reporting person’s initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter the disclosures provided in a prior cover page.

The information required in the remainder of this cover page shall not be deemed to be “filed” for the purpose of Section 18 of the Securities Exchange Act of 1934 (“Act”) or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).

 

 

 

CUSIP No. 450056106    13G   

 

 1   

 NAME OF REPORTING PERSON

 

 Artisan Partners Limited Partnership

 2  

 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (see Instructions)

 Not Applicable

 (a) ☐  (b) ☐

 

 3  

 SEC USE ONLY

 

 4  

 CITIZENSHIP OR PLACE OF ORGANIZATION

 

 Delaware

NUMBER OF

SHARES  BENEFICIALLY 

OWNED BY

EACH

REPORTING

PERSON

WITH

    5   

 SOLE VOTING POWER

 

 None

   6  

 SHARED VOTING POWER

 

 2,426,388

   7  

 SOLE DISPOSITIVE POWER

 

 None

   8  

 SHARED DISPOSITIVE POWER

 

 2,780,259

 9   

 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

 

 2,780,259

10  

 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES (see Instructions)

 Not Applicable

 

 ☐

11  

 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

 

 8.9%

12  

 TYPE OF REPORTING PERSON (see Instructions)

 

 IA

CUSIP No. 450056106    13G   

 

 1   

 NAME OF REPORTING PERSON

 

 Artisan Investments GP LLC

 2  

 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (see Instructions)

 Not Applicable

 (a) ☐  (b) ☐

 

 3  

 SEC USE ONLY

 

 4  

 CITIZENSHIP OR PLACE OF ORGANIZATION

 

 Delaware

NUMBER OF

SHARES  BENEFICIALLY 

OWNED BY

EACH

REPORTING

PERSON

WITH

    5   

 SOLE VOTING POWER

 

 None

   6  

 SHARED VOTING POWER

 

 2,426,388

   7  

 SOLE DISPOSITIVE POWER

 

 None

   8  

 SHARED DISPOSITIVE POWER

 

 2,780,259

 9   

 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

 

 2,780,259

10  

 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES (see Instructions)

 Not Applicable

 

 ☐

11  

 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

 

 8.9%

12  

 TYPE OF REPORTING PERSON (see Instructions)

 

 HC

CUSIP No. 450056106    13G   

 

 1   

 NAME OF REPORTING PERSON

 

 Artisan Partners Holdings LP

 2  

 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (see Instructions)

 Not Applicable

 (a) ☐  (b) ☐

 

 3  

 SEC USE ONLY

 

 4  

 CITIZENSHIP OR PLACE OF ORGANIZATION

 

 Delaware

NUMBER OF

SHARES  BENEFICIALLY 

OWNED BY

EACH

REPORTING

PERSON

WITH

    5   

 SOLE VOTING POWER

 

 None

   6  

 SHARED VOTING POWER

 

 2,426,388

   7  

 SOLE DISPOSITIVE POWER

 

 None

   8  

 SHARED DISPOSITIVE POWER

 

 2,780,259

 9   

 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

 

 2,780,259

10  

 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES (see Instructions)

 Not Applicable

 

 ☐

11  

 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

 

 8.9%

12  

 TYPE OF REPORTING PERSON (see Instructions)

 

 HC

 

CUSIP No. 450056106    13G   

 

 1   

 NAME OF REPORTING PERSON

 

 Artisan Partners Asset Management Inc.

 2  

 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (see Instructions)

 Not Applicable

 (a) ☐  (b) ☐

 

 3  

 SEC USE ONLY

 

 4  

 CITIZENSHIP OR PLACE OF ORGANIZATION

 

 Delaware

NUMBER OF

SHARES  BENEFICIALLY 

OWNED BY

EACH

REPORTING

PERSON

WITH

    5   

 SOLE VOTING POWER

 

 None

   6  

 SHARED VOTING POWER

 

 2,426,388

   7  

 SOLE DISPOSITIVE POWER

 

 None

   8  

 SHARED DISPOSITIVE POWER

 

 2,780,259

 9   

 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

 

 2,780,259

10  

 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES (see Instructions)

 Not Applicable

 

 ☐

11  

 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

 

 8.9%

12  

 TYPE OF REPORTING PERSON (see Instructions)

 

 HC

Item 1(a)

Name of Issuer:

iRhythm Technologies Inc.

 

Item 1(b)

Address of Issuer’s Principal Executive Offices:

699 8th Street, Suite 600, San Francisco, CA, 94103

 

Item 2(a)

Name of Person Filing:

Artisan Partners Limited Partnership (“APLP”)

Artisan Investments GP LLC (“Artisan Investments”)

Artisan Partners Holdings LP (“Artisan Holdings”)

Artisan Partners Asset Management Inc. (“APAM”)

 

Item 2(b)

Address of Principal Business Office:

APLP, Artisan Investments, Artisan Holdings, and APAM are all located at:

875 East Wisconsin Avenue, Suite 800 Milwaukee, WI 53202

 

Item 2(c)

Citizenship:

APLP is a Delaware limited partnership

Artisan Investments is a Delaware limited liability company

Artisan Holdings is a Delaware limited partnership

APAM is a Delaware corporation

 

Item 2(d)

Title of Class of Securities:

Common Stock

 

Item 2(e)

CUSIP Number:

450056106

 

Item 3

Type of Person:

(e) APLP is an investment adviser registered under section 203 of the Investment Advisers Act of 1940.

(g) Artisan Holdings is the sole limited partner of APLP and the sole member of Artisan Investments; Artisan Investments is the general partner of APLP; APAM is the general partner of Artisan Holdings.

Item 4

Ownership (at 9/30/2024):

 

  (a)

Amount owned “beneficially” within the meaning of rule 13d-3:

2,780,259

 

  (b)

Percent of class:

8.9% (based on 31,236,075 shares outstanding as of 7/25/2024)

 

  (c)

Number of shares as to which such person has:

 

  (i)

sole power to vote or to direct the vote: None

  (ii)

shared power to vote or to direct the vote: 2,426,388

  (iii)

sole power to dispose or to direct the disposition of: None

  (iv)

shared power to dispose or to direct the disposition of: 2,780,259

 

Item 5

Ownership of Five Percent or Less of a Class:

Not Applicable

 

Item 6

Ownership of More than Five Percent on Behalf of Another Person:

The shares reported herein have been acquired on behalf of discretionary clients of APLP. Persons other than APLP are entitled to receive all dividends from, and proceeds from the sale of, those shares. None of those persons, to the knowledge of APLP, Artisan Holdings, APAM, or Artisan Investments has an economic interest in more than 5% of the class.

 

Item 7

Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person:

Not Applicable

 

Item 8

Identification and Classification of Members of the Group:

Not Applicable

 

Item 9

Notice of Dissolution of Group:

Not Applicable

 

Item 10

Certification:

By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect.

Signature

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

Date: 11/12/2024

 

ARTISAN PARTNERS ASSET MANAGEMENT INC, for itself and as the general partner of
ARTISAN PARTNERS HOLDINGS LP
By:  

Gregory K. Ramirez *

ARTISAN INVESTMENTS GP LLC, for itself and as the general partner of
ARTISAN PARTNERS LIMITED PARTNERSHIP
By:  

Gregory K. Ramirez *

*By:  

/s/ Gregory K. Ramirez

  Gregory K. Ramirez
  Executive Vice President of Artisan Partners Asset Management Inc.
  Vice President of Artisan Investments GP LLC

Exhibit Index

 

Exhibit 1    Joint Filing Agreement dated 11/12/2024 by and among Artisan Partners Limited Partnership, Artisan Investments GP LLC, Artisan Partners Holdings LP, and Artisan Partners Asset Management Inc.

EXHIBIT 1

JOINT FILING AGREEMENT

The undersigned hereby agree to the joint filing of the Schedule 13G to which this Agreement is attached.

Dated: 11/12/2024

 

ARTISAN PARTNERS ASSET MANAGEMENT INC, for itself and as the general partner of
ARTISAN PARTNERS HOLDINGS LP
By:  

Gregory K. Ramirez *

ARTISAN INVESTMENTS GP LLC, for itself and as the general partner of
ARTISAN PARTNERS LIMITED PARTNERSHIP
By:  

Gregory K. Ramirez *

*By:  

/s/ Gregory K. Ramirez

  Gregory K. Ramirez
  Executive Vice President of Artisan Partners Asset Management Inc.
  Vice President of Artisan Investments GP LLC
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