Sienna Biopharmaceuticals ^{Priced, Nasdaq: SNNA}

We are a clinical-stage biopharmaceutical company focused on bringing innovations in biotechnology to the discovery, development and commercialization of first-in-class, targeted, topical products in medical dermatology and aesthetics. Our objective is to develop our multi-asset pipeline of topical therapies that enhance the health, appearance and quality of life of dermatology patients. We are advancing multiple product candidates derived from our Topical by Design platform, all of which are designed to be suitable for chronic administration in patients with inflammatory skin diseases and other dermatologic and aesthetic conditions. Our lead candidate from this platform, SNA-120, is a first-in-class inhibitor of TrkA in Phase 2b clinical development for the treatment of pruritus, or itch, associated with psoriasis, as well as for psoriasis itself. Our second Topical by Design product candidate, SNA-125, is a dual JAK3/TrkA inhibitor being developed for the treatment of atopic dermatitis, psoriasis and pruritus. Additionally, we have advanced SNA-001, a silver particle treatment derived from our Topical Photoparticle Therapy platform, into pivotal clinical trials for both acne vulgaris and the reduction of unwanted light-pigmented hair.