NASDAQ:IRTC 9 January 2026 - 13 January 2026

iRhythm shares fell 5.6% to $169.30 in late trading Monday after the company forecast 2026 revenue of $870–$880 million and an adjusted EBITDA margin of 11.5%–12.5%. Investors focused on the lack of detailed cost and margin data, as well as an upcoming corporate name change. About 1.35 million shares traded, with the stock swinging between $157.34 and $179.82. The company’s update remains preliminary.