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WALTHAM, Mass., March 2, 2016 – Syndax Pharmaceuticals, Inc., a clinical stage biopharmaceutical company focused on developing entinostat in multiple cancer indications, announced today that it has priced its initial public offering of 4,400,000 shares of its common stock at a public offering price of $12.00 per share, for an aggregate offering of $52.8 million, before underwriting discounts, commissions and expenses. In addition, Syndax has granted the underwriters a 30-day option to purchase up to 660,000 additional shares of common stock at the initial offering price to cover overallotments, if any. All of the common stock is being offered by Syndax. The common stock will begin trading on The NASDAQ Global Select Market on March 3, 2016 under the trading symbol "SNDX." The offering is expected to close on March 8, 2016, subject to customary closing conditions.