Insider Sale: Marc Rosenbaum Disposes 226 IRTC Shares, Retains 10,879

Rhea-AI Filing Summary

Marc Rosenbaum, Chief Accounting Officer of iRhythm Technologies (IRTC), sold 226 shares of the company's common stock on 08/11/2025 at a reported price of $158.93 per share.

The Form 4 states the sale was effected pursuant to a Rule 10b5-1 trading plan established by the reporting person on May 12, 2025. Following the reported transaction Rosenbaum beneficially owns 10,879 shares, held directly. The filing identifies his relationship to the issuer as an officer (Chief Accounting Officer) and discloses the transaction as a planned disposition under the 10b5-1 framework.

Positive

• Sale executed under a Rule 10b5-1 trading plan established May 12, 2025, indicating a pre-arranged transaction
• Reporting person continues to hold 10,879 direct shares after the transaction

Negative

• None.

Insights

Financial Analyst

TL;DR: A small, pre-planned insider sale that is unlikely to be material to investors on its own.

The Form 4 documents a sale of 226 shares at $158.93 executed on 08/11/2025. The reporting person remains a direct beneficial owner of 10,879 shares. Because the sale was conducted under a Rule 10b5-1 plan established on May 12, 2025, it reflects a scheduled disposition rather than an ad hoc market move. On its face this is a routine compliance-driven transaction with limited standalone impact on valuation or operations.

Corporate Governance Expert

TL;DR: Disclosure aligns with governance best practices; sale executed under an established 10b5-1 plan.

The filing identifies Marc Rosenbaum as Chief Accounting Officer and discloses the sale as executed pursuant to a Rule 10b5-1 trading plan dated May 12, 2025. The Form 4 provides the transaction price ($158.93), the number of shares sold (226) and shares remaining (10,879), meeting standard Section 16 disclosure requirements. From a governance standpoint this is a transparent, pre-arranged insider disposition consistent with policies that mitigate timing concerns.

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 TECHNOLOGIES, INC.

699 8TH STREET, #600

(Street)

SAN FRANCISCO CA 94103

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
iRhythm Technologies, 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)
08/11/2025

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	08/11/2025	08/11/2025	S		226(1)	D	$158.93	10,879	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.

Remarks:

	/s/ Marc Rosenbaum	08/12/2025
	** 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.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

FAQ

What transaction is reported in the Form 4 for iRhythm (IRTC)?

The Form 4 reports a sale of 226 shares of iRhythm common stock by Marc Rosenbaum on 08/11/2025.

At what price were the shares sold in the IRTC Form 4?

The reported sale price was $158.93 per share.

Was the sale by Marc Rosenbaum part of a 10b5-1 plan?

Yes. The Form 4 states the sale was effected pursuant to a Rule 10b5-1 trading plan established on May 12, 2025.

How many IRTC shares does the reporting person own after the transaction?

After the reported sale, Marc Rosenbaum beneficially owns 10,879 shares, held directly.

What is Marc Rosenbaum's role at iRhythm as disclosed in the filing?

The filing lists Marc Rosenbaum as an Officer, specifically the Chief Accounting Officer.

When was the transaction reported to have occurred?

The transaction date reported on the Form 4 is 08/11/2025.