Sienna Biopharmaceuticals, Inc. is a clinical-stage biopharmaceutical company that focuses on the discovery, clinical development, and commercialization of aesthetics and medical dermatology. Its products include Topical by Design platform for patients with inflammatory skin diseases and other dermatologic and aesthetic conditions through SNA-120, SNA-125, and SNA-001. The company was founded by Todd Harris and Frederick C. Beddingfield III on July 27, 2010 and is headquartered in Westlake Village, CA.