MONTREAL – Renewable materials company BioAmber Inc. has entered into an underwriting agreement with Rodman & Renshaw, a unit of H.C. Wainwright & Co. LLC, as sole book running manager and representative of several underwriters, under which the underwriters have agreed to purchase on a firm commitment basis a minimum of 2,105,264 shares of common stock of the company, together with warrants to purchase a minimum of 1,052,632 shares of common stock of the company with an exercise price of $5.50 per share of common stock (the “Exercise Price”), at a price to the public of $4.75 per share and associated warrant (the “Public Price”). The warrants have a term of four years, exercisable upon the date of issuance. The aggregate gross proceeds to the company (assuming no exercise of the warrants) are $10,000,000 before deducting underwriting discounts and commissions and estimated offering expenses. A portion of this offering may be placed in Canada on a private placement basis. All shares of common stock issued in connection with this offering, including those placed in Canada on a private placement basis, will be listed on the New York Stock Exchange and be freely tradable on such exchange.

The company has granted to the representative a 30-day option (the “Over-Allotment Option”) to purchase up to an additional 315,790 shares of common stock and/or warrants to purchase 157,895 shares of common stock of the company, for potentially additional aggregate proceeds to the company of up to approximately $1.5 million (assuming no exercise of the warrants) before deducting underwriting discounts and commissions and estimated offering expenses. In the event the Over-Allotment Option is exercised in full, the aggregate gross proceeds to the company (assuming no exercise of the warrants) will be approximately $11.5 million.