X0206 3 2016-10-19 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 Employee Stock Option (right to buy) 1.82 2026-05-23 Common Stock 125000 D The option vests and the shares become exercisable according to the following schedule: One thirty-sixth (1/36th) of the Shares subject to the Option shall vest on each full calendar month following May 23, 2016. The number of underlying shares of common stock reported in column 3 and the exercise price reported in column 4 does not reflect a 5.882698 for 1 reverse stock split, to be effective upon the closing of the issuer's initial public offering. The Date of Event is based upon the date of effectiveness of the Issuer's Registration Statement on Form S-1 filed in connection with the Issuer's initial public offering, estimated to be on or about October 19, 2016. /s/ Mark Jeffrey Rubash 2016-10-19