Notice of Effectiveness
UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
Notice of Effectiveness
Effectiveness Date: December 16, 2019
Accession Number: 0001193125-19-311570
Submission Type: POS AM
CIK: 0001656328
Company Name: Sienna Biopharmaceuticals, Inc.
File Number: 333-226595