BioAmber Announces Closing of Initial Public Offering

BioAmber announced today the closing of its initial public offering of 8,000,000 units consisting of one share of common stock and one warrant to purchase half of one share of common stock at $10.00 per unit, before underwriting discounts and commissions. Each warrant will be exercisable at an exercise price of $11.00 per whole share of common stock.

All units are being sold by BioAmber.

The units are listed on the New York Stock Exchange ("NYSE") under the symbol "BIOA.U". The common stock and warrants comprising the units will begin trading separately on NYSE under the symbols "BIOA" and "BIOA.WS", respectively, on Monday, June 10, 2013 at which time trading of the units will be suspended and the units will be delisted.

BioAmber also intends to list its common stock on the Professional Segment of the regulated market of NYSE Euronext in Paris under the symbol "BIOA."

Credit Suisse, Barclays and Société Générale are acting as joint book-running managers for the offering. Pacific Crest Securities is acting as co-manager for the offering.