Item 9.01 Financial Statements and Exhibits (d) Exhibits. Exhibit No. Description 99.1 Press release issued by iRhythm Holdings, Inc., dated as of October 5, 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: October 5, 2026 By: /s/ Daniel Wilson Daniel Wilson Chief Financial Officer