Audit chair quits—but the internal handoff keeps the disruption contained

This is a governance change, not an operating surprise. The filing contains no new financial results, guidance, or business update; Brian Yoor resigned from the board and as Audit Committee chair for personal reasons, explicitly without disagreement with the company. (Item 5.02 disclosure)

The immediate internal handoff limits the disruption. Director Karen McGinnis, already a board and Audit Committee member, was appointed chair effective August 12, 2026. That makes this a continuity move rather than a search for an outside replacement. (Item 5.02 disclosure)

Net read: routine and neutral versus expectations. Because no market benchmark applies and the filing offers no indication of an accounting, control, or strategic issue, the main takeaway is the unexpected personnel change—not a change to iRhythm’s financial picture.