Dimension Therapeutics Prices 5.5M Share IPO @$13.00/Share

Dimension Therapeutics, Inc. today announced the pricing of its initial public offering of 5,500,000 shares of its common stock at a public offering price of $13.00 per share. Dimension's underwriters have been granted a 30-day option to purchase up to an additional 825,000 shares of common stock at the public offering price less underwriting discounts and commissions. All shares in the offering will be sold by Dimension and are expected to begin trading on the NASDAQ Global Select Market on October 22, 2015 under the symbol "DMTX". Goldman, Sachs & Co. and Citigroup Global Markets Inc. are acting as joint book-running managers and representatives of the underwriters for the offering. Wells Fargo Securities, LLC is acting as lead manager, and Canaccord Genuity Inc. and Cantor Fitzgerald & Co are acting as co-managers. The offering is being made only by means of a prospectus. A copy of the final prospectus relating to these securities will be filed with the U.S. Securities and Exchange Commission (SEC). When available, copies of the prospectus relating to and describing the terms of