ProNAi Therapeutics Announces Closing of IPO and Full Exercise of the Underwriters’ Option to Purchase Additional Shares

VANCOUVER, July 21, 2015 /CNW/ – ProNAi Therapeutics, Inc. (NASDAQ: DNAI), a clinical-stage oncology company pioneering a novel class of therapeutics based on its proprietary DNAi technology platform, today announced the closing of its initial public offering of 9,315,000 shares of its common stock at a public offering price of $17.00 per share, which includes the exercise in full by the underwriters of their option to purchase an additional 1,215,000 shares of common stock. The shares began trading on The NASDAQ Global Market on July 16, 2015 under the symbol “DNAI.” Including proceeds from the sale of the additional shares subject to the underwriters’ option, the gross proceeds to ProNAi from the initial public offering were $158.4 million, before deducting underwriting discounts and commissions and estimated offering expenses.

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