Sientra, Inc. (NASDAQ: SIEN) (“Sientra” or the “Company”), a medical aesthetics company uniquely focused on plastic surgeons, today announced that it has commenced an underwritten public follow-on offering of its common stock to be sold by the Company. In addition, the Company intends to grant the underwriters a 30-day option to purchase additional shares. The offering is subject to market conditions, and there can be no assurance as to whether or when the offering may be completed, or as to the actual size or terms of the offering.

Sientra intends to use the net proceeds from this offering for general corporate purposes, including general and administrative expenses, capital expenditures and general working capital purposes. Sientra may also use a portion of the net proceeds to acquire or invest in complementary businesses, products and technologies, although it has no current commitments or agreements with respect to any acquisitions as of the date hereof.

Stifel is acting as book-running manager for the offering.