X0306 4 2016-10-25 0 0001388658 iRhythm Technologies, Inc. IRTC 0001384771 SYNERGY LIFE SCIENCE PARTNERS L P 1350 BAYSHORE HIGHWAY, SUITE 920 BURLINGAME CA 94010 0 0 1 0 0001584405 Synergy Venture Partners, LLC 1350 BAYSHORE HIGHWAY, SUITE 920 BURLINGAME CA 94010 0 0 1 0 0001584404 Jain Mudit K. 1350 BAYSHORE HIGHWAY, SUITE 920 BURLINGAME CA 94010 0 0 1 0 0001584403 Stack Richard S. 1350 BAYSHORE HIGHWAY, SUITE 920 BURLINGAME CA 94010 0 0 1 0 Common Stock 2016-10-25 4 C 0 2384524 A 2384524 D Series A Convertible Preferred Stock 2016-10-25 4 C 0 264419 0.00 D Common Stock 264419 0 D Series A Convertible Preferred Stock 2016-10-25 4 C 0 837328 0.00 D Common Stock 837328 0 D Series A Convertible Preferred Stock 2016-10-25 4 C 0 528838 0.00 D Common Stock 528838 0 D Series B Convertible Preferred Stock 2016-10-25 4 C 0 67768 0.00 D Common Stock 135833 0 D Series C Convertible Preferred Stock 2016-10-25 4 C 0 38358 0.00 D Common Stock 86184 0 D Series C Convertible Preferred Stock 2016-10-25 4 C 0 81174 0.00 D Common Stock 182387 0 D Series D Convertible Preferred Stock 2016-10-25 4 C 0 179011 0.00 D Common Stock 179011 0 D Series E Convertible Preferred Stock 2016-10-25 4 C 0 114018 0.00 D Common Stock 114018 0 D Series E Convertible Preferred Stock 2016-10-25 4 C 0 56506 0.00 D Common Stock 56506 0 D Series D Preferred Stock Warrant (Right to Buy) 0.001 2016-10-25 4 C 0 49581 0.00 D 2012-11-01 2019-11-01 Common Stock 49581 0 D The Series A Convertible Preferred Stock converted into Common Stock on a 1-for-1 basis and had no expiration date. The Series B Convertible Preferred Stock converted into Common Stock on a 2.00438849-for-1 basis and had no expiration date. The Series C Convertible Preferred Stock converted into Common Stock on a 2.24685484-for-1 basis and had no expiration date. The Series D Convertible Preferred Stock converted into Common Stock on a 1-for-1 basis and had no expiration date. The Series E Convertible Preferred Stock converted into Common Stock on a 1-for-1 basis and had no expiration date. Reflects 5.882698 for 1 reverse stock split which became effective on October 5, 2016. Synergy Venture Partners, LLC ("SVP LLC") serves as the sole General Partner of Synergy Life Science Partners, LP ("Synergy"). As such, SVP LLC possesses sole voting and investment control over the securities owned by Synergy, and may be deemed to have indirect beneficial ownership of the securities held by Synergy. SVP LLC, however, owns no securities of the Issuer directly. Messrs. Stack, Jain and Starling are Managers of SVP LLC and share voting and dispositive power over the shares held by Synergy. Each Reporting Person disclaims beneficial ownership of the shares held by Synergy except to the extent of his or its proportionate pecuniary interest therein. Exhibit List Exhibit 99 /s/ William N. Starling, William N. Starling, Jr., Synergy Life Science Partners, LP 2016-10-25 /s/ William N. Starling, William N. Starling, Jr., Synergy Venture Partners, LLC 2016-10-25 /s/ Mudit Jain, Synergy Venture Partners, LLC 2016-10-25 /s/ Richard Stack, Synergy Venture Partners, LLC 2016-10-25