Item 5.02 Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers. Effective as of March 12, 2026, the Board of Directors (the "Board") of iRhythm Holdings, Inc., a Delaware corporation (the "Company") appointed Jason Patten as a director of the Board and member of the Audit Committee of the Board (the “ Audit Committee”). Mr. Patten shall hold office for a term expiring at the 2026 Annual Meeting of the Company’s stockholders. There is no arrangement or understanding between Mr. Patten and any other persons pursuant to which Mr. Patten was selected as a director. Mr. Patten is not a party to, nor has any direct or indirect material interest in any transaction with the Company required to be disclosed under Item 404(a) of Regulation S-K. The Board determined that Mr. Patten qualifies as an independent director pursuant to the Securities Act of 1933, as amended, and the listing standards of the Nasdaq Stock Market, in each case as currently in effect and meets the further audit committee standards required by Securities and Exchange Commission (“ SEC”) Rule 10A-3. Mr. Patten will also enter into the Company’s standard form of indemnification agreement for its directors and executive officers, which was filed as Exhibit 10.8 to the Company’s Annual Report on Form 10-K (File No. 001-37918) filed with the SEC on February 19, 2026. Consistent with the Company’s compensation policy for non-employee directors (the “ Director Compensation Policy”), upon appointment, Mr. Patten was granted an initial retainer grant of restricted stock units with a grant date value of $300,000 vesting annually over the three years following March 12, 2026. Mr. Patten will also receive the customary annual compensation paid to non-employee directors in the form of a cash retainer, paid quarterly in arrears, for his service on the Board and the Audit Committee in an amount consistent with the Director Compensation Policy (currently $55,000 per year for service on the Board and $10,000 per year for service on the Audit Committee). The initial retainer grant will be issued under the Company’s 2016 Equity Incentive Plan and will accelerate in full upon a change of control, provided that Mr. Patten remains in service through such change in control. Prior to being appointed to the Board, Mr. Patten served as an advisor to the Company’s President and Chief Executive Officer. In connection with that role, Mr. Patten received a one time payment of $86,771 in cash for services rendered.

Item 9.01 Financial Statements and Exhibits (d) Exhibits Exhibit No. Description 99.1 Press release dated March 1 2, 2026 ──────────────────────────────────────────────────────────────────────────────── 104 Cover Page Interactive Data File (formatted as Inline XBRL) SIGNATURES Pursuant to the requirements of the Securities Exchange Act of 1934, as amended, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized. IRHYTHM HOLDINGS, INC. Date: March 12, 2026 By: /s/ Daniel Wilson Daniel Wilson Chief Financial Officer