iRhythm CTO sells shares for RSU tax obligations

iRhythm Holdings, Inc. Chief Technology Officer Lawrence Brian Lee reported a small share disposition linked to equity compensation.

Rhea-AI Filing Summary

iRhythm Holdings, Inc. Chief Technology Officer Lawrence Brian Lee reported a small share disposition linked to equity compensation. On this Form 4, he sold 1,014 shares of common stock at $120.80 per share, and held 20,154 shares afterward.

According to the footnote, these shares were sold specifically to cover tax withholding and remittance obligations arising from the vesting of Restricted Stock Units (RSUs), indicating a routine, compensation-related transaction rather than a discretionary open-market sale for portfolio reasons.

Insider Trade Summary

Net Seller: 1,014 shares

Net Sell 1 txn

Insider Lawrence Brian Lee

Role Chief Technology Officer

Sold 1,014 shs ($122K)

Type	Security	Shares	Price	Value
Sale	Common Stock	1,014	$120.80	$122K

Holdings After Transaction: Common Stock — 20,154 shares (Direct)

Footnotes (1)

1. F1. These shares were sold to cover tax withholding and remittance obligations in connection with the vesting of Restricted Stock Units (RSUs).

Key Figures

Shares sold: 1,014 shares Sale price: $120.80 per share Shares held after sale: 20,154 shares

3 metrics

Shares sold 1,014 shares Common Stock sold on May 4, 2026

Sale price $120.80 per share Average price for the reported transaction

Shares held after sale 20,154 shares Direct ownership following the transaction

Key Terms

Restricted Stock Units (RSUs), tax withholding, open-market sale

3 terms

Restricted Stock Units (RSUs) financial

"in connection with the vesting of Restricted Stock Units (RSUs)"

Restricted stock units (RSUs) are a type of company promise to give employees shares of stock in the future, usually after certain conditions like working for a set time. They are like a gift promised today that you receive later, which can become valuable if the company's stock price goes up. RSUs matter because they are a way companies reward employees and can be a significant part of compensation.

tax withholding financial

"sold to cover tax withholding and remittance obligations"

Tax withholding is the practice of taking a portion of a payment—such as wages, dividends, or sale proceeds—before it reaches the recipient and sending that portion to the tax authority as an advance on the recipient’s eventual tax bill. For investors it matters because withholding reduces immediate cash received and affects after‑tax returns, estimated tax payments, and whether you may owe more or receive a refund when taxes are finally calculated, like having a small automatic savings set aside for your tax bill.

open-market sale financial

"transaction_action": "open-market sale""

An open-market sale is when a shareholder sells existing shares directly on a public exchange to any willing buyer, rather than through a private deal. Think of it like putting goods on a busy market stall where price is set by supply and demand; for investors it matters because such sales increase available supply, can put short-term downward pressure on the stock price, and signal changes in liquidity or investor confidence.

FAQ

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

What insider transaction did iRhythm Holdings (IRTC) disclose for Lawrence Brian Lee?

iRhythm Holdings disclosed that Chief Technology Officer Lawrence Brian Lee sold 1,014 shares of common stock at $120.80 per share. The filing notes this sale was made to satisfy tax withholding and remittance obligations related to the vesting of Restricted Stock Units (RSUs).

How many iRhythm Holdings (IRTC) shares does Lawrence Brian Lee hold after this Form 4?

After the reported transaction, Lawrence Brian Lee directly holds 20,154 shares of iRhythm Holdings common stock. This post-transaction figure comes from the Form 4 and reflects his remaining direct ownership following the tax-related sale of 1,014 shares tied to RSU vesting.

Was the iRhythm Holdings (IRTC) CTO sale a discretionary open-market trade?

The Form 4 uses a sale code, but the footnote explains the 1,014 shares were sold to cover tax withholding and remittance obligations from RSU vesting. This indicates a routine, compensation-driven transaction rather than a discretionary open-market sale motivated by portfolio or valuation views.

What was the price per share in the iRhythm Holdings (IRTC) CTO’s reported sale?

The reported transaction shows a sale price of $120.80 per share for 1,014 shares of iRhythm Holdings common stock. This price is the average transaction price disclosed for the shares sold to cover tax obligations tied to the vesting of Restricted Stock Units (RSUs).

How does the Form 4 describe the purpose of the iRhythm Holdings (IRTC) stock sale?

The Form 4 footnote states the shares were sold to cover tax withholding and remittance obligations related to vesting RSUs. This language frames the sale as a mechanical, compensation-related event necessary for tax compliance, not as an independent investment or trading decision.

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

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Accepted by SEC EDGAR 05/05/2026 - 04:36 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).

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^*

Lawrence Brian Lee

(Last) (First) (Middle)

C/O IRHYTHM HOLDINGS, INC.

699 8TH ST #600

(Street)

SAN FRANCISCO CALIFORNIA 94103

(City) (State) (Zip)

UNITED STATES

(Country)

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 Technology Officer

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/04/2026

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

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

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

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	05/04/2026	05/04/2026	S		1,014(1)	D	$120.8	20,154	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. These shares were sold to cover tax withholding and remittance obligations in connection with the vesting of Restricted Stock Units (RSUs).

Remarks:

	/s/ Marc Rosenbaum, attorney-in-fact	05/05/2026
	** 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.
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.
* Form 4: SEC 1474 (03-26)