iRhythm Technologies, Inc. — Director's Dealing 2025

Aug 6, 2025

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: iRhythm Technologies, Inc. (IRTC)
CIK: 0001388658
Period of Report: 2025-08-05

Reporting Person: Blackford Quentin S. (Director, President and CEO)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2025-08-05	Common Stock	S	8726	$158.8537	Disposed	200312	Direct
2025-08-05	Common Stock	S	9775	$160.059	Disposed	190537	Direct
2025-08-05	Common Stock	S	4905	$160.7259	Disposed	185632	Direct
2025-08-05	Common Stock	S	1600	$161.9225	Disposed	184032	Direct
2025-08-05	Common Stock	S	1514	$163.2959	Disposed	182518	Direct
2025-08-05	Common Stock	S	3174	$163.9259	Disposed	179344	Direct
2025-08-05	Common Stock	S	306	$165	Disposed	179038	Direct

Footnotes

F1: 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.

F2: 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.

F3: 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.

F4: 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.

F5: 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.

F6: 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.

F7: 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.