X0306 4 2019-04-01 false 0001656328 Sienna Biopharmaceuticals, Inc. SNNA 0001771961 Azoy Alexander 30699 RUSSELL RANCH ROAD SUITE 140 WESTLAKE VILLAGE CA 91362 false true false false Chief Financial Officer Common Stock 2019-04-01 4 A false 20000.00 A 37500.00 D Stock Options (Right to buy) 2.37 2019-04-01 4 A false 20000.00 0.00 A 2029-04-01 Common Stock 20000.00 20000.00 D Award of restricted stock units ("RSUs") granted under the Issuer's 2017 Incentive Award Plan. Each RSU entitles the Reporting Person to receive one share of Issuer's common stock upon vesting. The award vests as to twenty-five percent (25%) of the total number of RSUs on October 1, 2019, twenty-five percent (25%) of the total number of RSUs on April 1, 2020, and the remaining fifty percent (50%) of the total number of RSUs on the second anniversary, in each case, subject to the Reporting Person's continued employment or service relationship with the Issuer through the applicable vesting date. Includes 17,500 shares of the Issuer's common stock underlying the RSUs awarded. Twenty-five percent (25%) of the shares subject to the option vest and become exercisable on October 1, 2019, twenty-five percent (25%) of the shares vest and become exercisable on April 1, 2020, and the remaining shares vest and become exercisable in 12 successive, equal monthly installments thereafter, subject to the Reporting Person's continued employment or service relationship with the Issuer on each such vesting date. /s/Timothy K. Andrews, attorney-in-fact for Alexander Azoy 2019-04-03