iRhythm CAO sells 280 shares under 10b5-1 plan

iRhythm Holdings, Inc. Chief Accounting Officer Marc Wade Rosenbaum reported an open-market sale of 280 shares of common stock at an average price of $140.91 per share on February 24, 2026.

Rhea-AI Filing Summary

iRhythm Holdings, Inc. Chief Accounting Officer Marc Wade Rosenbaum reported an open-market sale of 280 shares of common stock at an average price of $140.91 per share on February 24, 2026. After this sale, he directly holds 10,601 shares of iRhythm common stock.

The transaction was executed under a pre-arranged Rule 10b5-1 trading plan that he established on May 12, 2025 and modified on November 25, 2025, which is designed to allow systematic share sales according to preset instructions.

Insider Trade Summary

Net Seller: 280 shares

Net Sell 1 txn

Insider Rosenbaum Marc Wade

Role Chief Accounting Officer

Sold 280 shs ($39K)

Type	Security	Shares	Price	Value
Sale	Common Stock	280	$140.91	$39K

Holdings After Transaction: Common Stock — 10,601 shares (Direct)

Footnotes (1)

1. F1. The sale reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan established by the reporting person on May 12, 2025 and modified on November 25, 2025.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider transaction did iRhythm (IRTC) report for Marc Wade Rosenbaum?

Marc Wade Rosenbaum, iRhythm’s Chief Accounting Officer, sold 280 shares of common stock. The sale occurred on February 24, 2026 at an average price of $140.91 per share, and was reported on a Form 4 insider trading filing with the SEC.

At what price did the iRhythm (IRTC) insider shares sell on February 24, 2026?

The reported insider sale was executed at an average price of $140.91 per share. This price reflects the consideration received per share in the open-market transaction disclosed on Form 4 for iRhythm’s Chief Accounting Officer, Marc Wade Rosenbaum.

How many iRhythm (IRTC) shares does Marc Wade Rosenbaum hold after the Form 4 sale?

After selling 280 shares, Marc Wade Rosenbaum directly holds 10,601 shares of iRhythm common stock. This post-transaction balance is disclosed in the Form 4 and reflects his remaining direct ownership following the reported open-market sale.

Was the iRhythm (IRTC) insider sale made under a Rule 10b5-1 trading plan?

Yes. The Form 4 states the sale was effected under a Rule 10b5-1 trading plan. Marc Wade Rosenbaum established this plan on May 12, 2025 and later modified it on November 25, 2025, providing preset instructions for executing trades.

What role does Marc Wade Rosenbaum hold at iRhythm (IRTC) in this Form 4 filing?

Marc Wade Rosenbaum is identified as the Chief Accounting Officer of iRhythm Holdings, Inc. His officer status is disclosed in the filing, which reports his direct ownership and the sale of 280 shares of the company’s common stock on February 24, 2026.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 02/25/2026 - 07:00 PM Learn about SEC filing dates

SEC Form 4

FORM 4

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

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

X

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Rosenbaum Marc Wade

(Last) (First) (Middle)

C/O IRHYTHM HOLDINGS, INC.

699 8TH STREET, #600

(Street)

SAN FRANCISCO CA 94103

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
iRhythm Holdings, Inc. [ IRTC ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Chief Accounting Officer

3. Date of Earliest Transaction (Month/Day/Year)
02/24/2026

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	02/24/2026	02/24/2026	S		280(1)	D	$140.91	10,601	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. The sale reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan established by the reporting person on May 12, 2025 and modified on November 25, 2025.

Remarks:

On January 12, 2026, iRhythm Technologies, Inc. (iRhythm Tech) and iRhythm Holdings, Inc. (Issuer) effectuated a holding company reorganization pursuant to which the Issuer became the successor issuer to iRhythm Tech pursuant to Rule 12g-3(a) of the Securities Exchange Act of 1934, as amended. On such date, all outstanding shares and equity awards of iRhythm Tech automatically converted into securities of the Issuer on a one for one basis, with no change to the proportionate interests of security holders.

	Marc Rosenbaum	02/25/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
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