X0206 3 2016-10-19 0 0001388658 iRhythm Technologies, Inc. IRTC 0001670676 Vort David A C/O IRHYTHM TECHNOLOGIES, INC. 650 TOWNSEND STREET, SUITE 380 SAN FRANCISCO CA 94103 0 1 0 0 EVP, Sales Employee Stock Option (right to buy) 0.62 2024-02-04 Common Stock 590000 D Employee Stock Option (right to buy) 0.68 2024-07-10 Common Stock 99000 D Employee Stock Option (right to buy) 0.99 2025-02-10 Common Stock 50000 D Employee Stock Option (right to buy) 1.27 2025-07-21 Common Stock 200000 D Employee Stock Option (right to buy) 1.39 2025-12-15 Common Stock 200000 D The option vests and the shares become exercisable according to the following schedule: 1/4 on January 1, 2015 and 1/36 of the remaining shares on each full calendar month thereafter. The option vests and the shares become exercisable according to the following schedule: 1/4 on June 10, 2015 and 1/36 of the remaining shares on each full calendar month thereafter. The option vests and the shares become exercisable according to the following schedule: 1/4 on February 10, 2016 and 1/36 of the remaining shares on each full calendar month thereafter. The option vests and the shares become exercisable according to the following schedule: 1/4 on July 21, 2016 and 1/36 of the remaining shares on each full calendar month thereafter. The option vests and the shares become exercisable according to the following schedule: 1/4 on December 15, 2016 and 1/36 of the remaining shares on each full calendar month therafter. 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/ David Vort 2016-10-19