X0306 4/A 2019-02-27 2019-03-01 0 0001388658 iRhythm Technologies, Inc. IRTC 0001670118 Sung Derrick C/O IRHYTHM TECHNOLOGIES, INC 650 TOWNSEND STREET, SUITE 500 SAN FRANCISCO CA 94103 0 1 0 0 EVP, Strat Corp Development Common Stock 2019-02-27 4 A 0 1725 0.00 A 26983 D The reported securities are represented by restricted stock units ("RSUs"), each of which represents a contingent right to receive one share of IRTC common stock. This amendment is filed to set forth the correct vesting schedule of the RSUs, which is 25% of the shares on March 1, 2020 and each one-year anniversary thereafter. Denise Mandell, attorney in fact 2019-03-18