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: Shrishrimal Sumi (EVP, Chief Risk Officer)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2023-11-30	Common Stock	J	166	$72.49	Acquired	23464	Direct
2024-05-31	Common Stock	J	186	$74.98	Acquired	23650	Direct
2024-11-29	Common Stock	J	110	$71.46	Acquired	23760	Direct
2025-02-25	Common Stock	A	15293	—	Acquired	39053	Direct
2025-02-26	Common Stock	A	6732	—	Acquired	45785	Direct
2025-02-26	Common Stock	S	7942	$112.13	Disposed	37843	Direct

Footnotes

F1: Ms. Shrishrimal 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: Ms. Shrishrimal 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, 2023 through May 31, 2024. This transaction is exempt from Section 16(b) under Rule 16b-3.

F3: Ms. Shrishrimal 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 June 1, 2024 through November 30, 2024. This transaction is exempt from Section 16(b) under Rule 16b-3.

F4: 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 May 24, 2022.

F5: 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.

F6: These shares were sold to cover tax withholding and remittance obligations in connection with the vesting of performance RSUs.