X0306 4 2016-01-26 0 0001551693 Sientra, Inc. SIEN 0001622119 Huiner Charles 420 SOUTH FAIRVIEW AVENUE, SUITE 200 SANTA BARBARA CA 93117 0 1 0 0 Chief Operating Officer Common Stock (RSU) 2016-01-26 4 A 0 110000 0 A 114933 D Employee Stock Option (right to buy) 15.65 2016-01-27 4 A 0 2500 0 A 2016-01-27 2025-01-27 Common Stock 2500 95227 D One-third (1/3) of the restricted stock units shall vest on the first anniversary of the vesting calculation date, one-third (1/3) of the restricted stock units shall vest on the second anniversary of the vesting calculation date and the remaining one-third (1/3) of the restricted stock units shall vest on the third anniversary of the vesting calculation date, subject to continued Service (as defined in the Sientra, Inc. 2014 Stock Incentive Plan) with the Company. Includes Employee Stock Purchase Plan purchases of 1,933 shares of Common Stock on July 20, 2015 and 3,000 shares of Common Stock on January 20, 2016 /s/ Matthew Pigeon, Attorney-in-fact for Charles Huiner 2016-01-28