Karen Ling - 27 May 2026 Form 4 Insider Report for iRhythm Holdings, Inc. (IRTC)

Reporting relationship: Director
Issuer ticker: IRTC
Reported as of: 27 May 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 29 May 2026, 16:04:14 UTC
Prior SEC filing: 28 May 2026
Source filing: View source filing
Reporting owner signature: /s/ Marc Rosenbaum, attorney-in-fact

Key filing fact

Karen Ling filed Form 4 for iRhythm Holdings, Inc. (IRTC) on 29 May 2026.

Key facts

This page summarizes Karen Ling's Form 4 filing for iRhythm Holdings, Inc. (IRTC).
1 reported transaction and 0 derivative rows are listed below.
Accepted by SEC: 29 May 2026, 16:04.

Change

Previous filing in this sequence was filed on 28 May 2026.
Current net transaction value: $0.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001597450 Primary reporting owner

Ling Karen

Relationship: Director
Address: C/O IRHYTHM HOLDINGS, INC., 699 8TH ST #600, SAN FRANCISCO
Signature: /s/ Marc Rosenbaum, attorney-in-fact
Signature date: 29 May 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

IRTC transaction

Common Stock

Award

Transaction value
Shares: +1,573
Change %: +16%
Price: $0.000000^*
Shares after: 11,141
Date: 27 May 2026
Ownership: Direct
Footnotes: F1

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 1 footnote

Footnote F1

These securities are restricted stock units ("RSUs"). Each RSU represents a contingent right to receive one share of IRTC Common Stock. The vesting occurs on the earlier of (i) one year after grant or the (ii) the date of the company's next annual meeting.

SEC remarks

On January 12, 2026, iRhythm Technologies, Inc. (iRhythm Tech) and iRhythm Holdings, Inc. (Issuer) effectuated a holding company reorganization pursuant to which the Issuer became the successor issuer to iRhythm Tech pursuant to Rule 12g-3(a) of the Securities Exchange Act of 1934, as amended. On such date, all outstanding shares and equity awards of iRhythm Tech automatically converted into securities of the Issuer on a one for one basis, with no change to the proportionate interests of security holders.