X0306 4 2018-05-23 0 0001388658 iRhythm Technologies, Inc. IRTC 0001209186 RUBASH MARK J C/O IRHYTHM TECHNOLOGIES, INC. 650 TOWNSEND STREET, SUITE 380 SAN FRANCISCO CA 94103 1 0 0 0 Common Stock 2018-05-23 4 A 0 1631 0.00 A 2992 D The reported securities are represented by restricted stock units ("RSUs"), which represents a contingent right to receive shares of IRTC common stock. The RSUs fully vest on May 23, 2019. Exhibit List Exhibit 24- Power of Attorney /s/ Kristen Blumenthal, attorney in fact 2018-06-06