[Form 4] iRhythm Technologies, Inc Insider Trading Activity

Insider Trade Summary

Net Seller: 30,000 shares ($4,816,191)

Net Sell 7 txns

Insider Blackford Quentin S.

Role President and CEO

Sold 30,000 shs ($4.82M)

Type	Security	Shares	Price	Value
Sale	Common Stock	8,726	$158.8537	$1.39M
Sale	Common Stock	9,775	$160.059	$1.56M
Sale	Common Stock	4,905	$160.7259	$788K
Sale	Common Stock	1,600	$161.9225	$259K
Sale	Common Stock	1,514	$163.2959	$247K
Sale	Common Stock	3,174	$163.9259	$520K
Sale	Common Stock	306	$165.00	$50K

Holdings After Transaction: Common Stock — 200,312 shares (Direct)

Footnotes (1)

1. All sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan established by the reporting person on May 5, 2025. Represents the weighted-average sale price per share of a series of transactions, all of which were executed on August 5, 2025. The actual sale prices ranged from a low of $158.47 to a high of $159.42, inclusive. The reporting person undertakes to provide upon request of the SEC staff, iRhythm Technologies, Inc. or any security holder of iRhythm Technologies, Inc., full information regarding the numbers of shares sold at each price within the range. The amount reflected has been rounded to 4 decimal points. Represents the weighted-average sale price per share of a series of transactions, all of which were executed on August 5, 2025. The actual sale prices ranged from a low of $159.53 to a high of $160.44, inclusive. The reporting person undertakes to provide upon request of the SEC staff, iRhythm Technologies, Inc. or any security holder of iRhythm Technologies, Inc., full information regarding the numbers of shares sold at each price within the range. The amount reflected has been rounded to 4 decimal points. Represents the weighted-average sale price per share of a series of transactions, all of which were executed on August 5, 2025. The actual sale prices ranged from a low of $160.49 to a high of $161.45, inclusive. The reporting person undertakes to provide upon request of the SEC staff, iRhythm Technologies, Inc. or any security holder of iRhythm Technologies, Inc., full information regarding the numbers of shares sold at each price within the range. The amount reflected has been rounded to 4 decimal points. Represents the weighted-average sale price per share of a series of transactions, all of which were executed on August 5, 2025. The actual sale prices ranged from a low of $161.63 to a high of $162.41, inclusive. The reporting person undertakes to provide upon request of the SEC staff, iRhythm Technologies, Inc. or any security holder of iRhythm Technologies, Inc., full information regarding the numbers of shares sold at each price within the range. The amount reflected has been rounded to 4 decimal points. Represents the weighted-average sale price per share of a series of transactions, all of which were executed on August 5, 2025. The actual sale prices ranged from a low of $162.71 to a high of $163.44, inclusive. The reporting person undertakes to provide upon request of the SEC staff, iRhythm Technologies, Inc. or any security holder of iRhythm Technologies, Inc., full information regarding the numbers of shares sold at each price within the range. The amount reflected has been rounded to 4 decimal points. Represents the weighted-average sale price per share of a series of transactions, all of which were executed on August 5, 2025. The actual sale prices ranged from a low of $163.50 to a high of $164.23, inclusive. The reporting person undertakes to provide upon request of the SEC staff, iRhythm Technologies, Inc. or any security holder of iRhythm Technologies, Inc., full information regarding the numbers of shares sold at each price within the range. The amount reflected has been rounded to 4 decimal points.

Form 4 Insider Transactions: What Each Field Means →

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^*

Blackford Quentin S.

(Last) (First) (Middle)

C/O IRHYTHM TECHNOLOGIES, INC.

699 8TH ST #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)

X	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	President and CEO

3. Date of Earliest Transaction (Month/Day/Year)
08/05/2025

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	08/05/2025	08/05/2025	S		8,726(1)	D	$158.8537(2)	200,312	D
Common Stock	08/05/2025	08/05/2025	S		9,775(1)	D	$160.059(3)	190,537	D
Common Stock	08/05/2025	08/05/2025	S		4,905(1)	D	$160.7259(4)	185,632	D
Common Stock	08/05/2025	08/05/2025	S		1,600(1)	D	$161.9225(5)	184,032	D
Common Stock	08/05/2025	08/05/2025	S		1,514(1)	D	$163.2959(6)	182,518	D
Common Stock	08/05/2025	08/05/2025	S		3,174(1)	D	$163.9259(7)	179,344	D
Common Stock	08/05/2025	08/05/2025	S		306(1)	D	$165	179,038	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. All sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan established by the reporting person on May 5, 2025.

2. Represents the weighted-average sale price per share of a series of transactions, all of which were executed on August 5, 2025. The actual sale prices ranged from a low of $158.47 to a high of $159.42, inclusive. The reporting person undertakes to provide upon request of the SEC staff, iRhythm Technologies, Inc. or any security holder of iRhythm Technologies, Inc., full information regarding the numbers of shares sold at each price within the range. The amount reflected has been rounded to 4 decimal points.

3. Represents the weighted-average sale price per share of a series of transactions, all of which were executed on August 5, 2025. The actual sale prices ranged from a low of $159.53 to a high of $160.44, inclusive. The reporting person undertakes to provide upon request of the SEC staff, iRhythm Technologies, Inc. or any security holder of iRhythm Technologies, Inc., full information regarding the numbers of shares sold at each price within the range. The amount reflected has been rounded to 4 decimal points.

4. Represents the weighted-average sale price per share of a series of transactions, all of which were executed on August 5, 2025. The actual sale prices ranged from a low of $160.49 to a high of $161.45, inclusive. The reporting person undertakes to provide upon request of the SEC staff, iRhythm Technologies, Inc. or any security holder of iRhythm Technologies, Inc., full information regarding the numbers of shares sold at each price within the range. The amount reflected has been rounded to 4 decimal points.

5. Represents the weighted-average sale price per share of a series of transactions, all of which were executed on August 5, 2025. The actual sale prices ranged from a low of $161.63 to a high of $162.41, inclusive. The reporting person undertakes to provide upon request of the SEC staff, iRhythm Technologies, Inc. or any security holder of iRhythm Technologies, Inc., full information regarding the numbers of shares sold at each price within the range. The amount reflected has been rounded to 4 decimal points.

6. Represents the weighted-average sale price per share of a series of transactions, all of which were executed on August 5, 2025. The actual sale prices ranged from a low of $162.71 to a high of $163.44, inclusive. The reporting person undertakes to provide upon request of the SEC staff, iRhythm Technologies, Inc. or any security holder of iRhythm Technologies, Inc., full information regarding the numbers of shares sold at each price within the range. The amount reflected has been rounded to 4 decimal points.

7. Represents the weighted-average sale price per share of a series of transactions, all of which were executed on August 5, 2025. The actual sale prices ranged from a low of $163.50 to a high of $164.23, inclusive. The reporting person undertakes to provide upon request of the SEC staff, iRhythm Technologies, Inc. or any security holder of iRhythm Technologies, Inc., full information regarding the numbers of shares sold at each price within the range. The amount reflected has been rounded to 4 decimal points.

Remarks:

	/s/ Marc Rosenbaum, attorney-in-fact	08/06/2025
	** 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).
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