X0306 4 2019-06-14 0 0001551693 Sientra, Inc. SIEN 0001637140 SCHAISON PHILIPPE 420 SOUTH FAIRVIEW AVENUE, SUITE 200 SANTA BARBARA CA 93117 1 0 0 0 Common Stock (RSUs) 2019-06-14 4 A 0 19320 0.00 A 63145 D The Restricted Stock Units (RSUs) will vest on the earlier to occur of: (i) the day prior to the Annual Meeting for the fiscal year following the date of grant or (ii) the one (1) year anniversary of the Annual Meeting on which the Annual Grant was granted, subject to continued service as a director of the Issuer. /s/ Oliver Bennett, Attorney-in-Fact 2019-06-18