iRhythm Technologies, Inc. — Director's Dealing 2025

Feb 27, 2025

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: iRhythm Technologies, Inc. (IRTC)
CIK: 0001388658
Period of Report: 2023-11-30

Reporting Person: Patterson Chad (Chief Commercial Officer)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2023-11-30	Common Stock	J	89	$72.49	Acquired	37222	Direct
2025-02-25	Common Stock	S	461	$118.98	Disposed	36761	Direct
2025-02-25	Common Stock	A	25546	—	Acquired	62307	Direct
2025-02-26	Common Stock	A	12118	—	Acquired	74425	Direct
2025-02-26	Common Stock	S	13229	$112.13	Disposed	61196	Direct

Footnotes

F1: Mr. Patterson is voluntarily reporting the acquisition of shares of the Issuer's common stock pursuant to the Issuer's 2016 Employee Stock Purchase Plan for the purchase period December 1, 2022 through November 30, 2023. This transaction is exempt from Section 16(b) under Rule 16b-3.

F2: This transaction represents the sale of common stock originally acquired by the reporting person pursuant to the Issuer's Employee Stock Purchase Plan effected through a 10b5-1 plan.

F3: Represents the acquisition of shares upon the determination of the Compensation Committee of the Board of Directors of the Issuer that the performance conditions were met with respect to
performance Restricted Stock Units ("RSUs") granted to the Reporting Person on July 25, 2022.

F4: These securities are RSUs. Each RSU represents a contingent right to receive one share of the Issuer's Common Stock. 25% of the RSUs vest on March 1, 2026 and each one-year anniversary thereafter, subject to the Reporting Person continuing as a service provider through each such date.

F5: These shares were sold to cover tax withholding and remittance obligations in connection with the vesting of performance RSUs.