Release Details

Collegium Pharmaceutical Announces Closing of Its Initial Public Offering and Exercise in Full of Option to Purchase Additional Shares

May 12, 2015

CANTON, Mass., May 12, 2015 (GLOBE NEWSWIRE) -- Collegium Pharmaceutical, Inc. (Nasdaq:COLL) announced today the closing of its initial public offering of 6,670,000 shares of its common stock at a price to the public of $12.00 per share, before underwriting discounts and commissions, including shares issued upon the exercise of the underwriters' option to purchase additional shares, resulting in gross proceeds of $80.0 million. The company's shares began trading on The NASDAQ Global Select Market on Thursday, May 7, 2015 under the ticker symbol "COLL."

Jefferies LLC and Piper Jaffray & Co. acted as joint book-running managers. Wells Fargo Securities, LLC acted as lead manager and Needham & Company, LLC acted as co-manager in the proposed offering.

A registration statement relating to these securities was declared effective by the Securities and Exchange Commission on May 6, 2015. This offering was made only by means of a prospectus. Copies of the final prospectus relating to this offering may be obtained by contacting: Jefferies LLC, Attn: Equity Syndicate Prospectus Department, 520 Madison Ave, 2nd Floor, New York, NY 10022, by telephone at (877) 547-6340 or by email at; or Piper Jaffray & Co., Attention: Prospectus Department, 800 Nicollet Mall, J12S03, Minneapolis, MN 55402, or by telephone at (800) 747-3924 or by email at

This press release shall not constitute an offer to sell or a solicitation of an offer to buy these securities, nor shall there be any sale of these securities, in any state or jurisdiction in which such offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of any such state or jurisdiction.

About Collegium Pharmaceutical, Inc.

Collegium is a specialty pharmaceutical company focused on developing a portfolio of products that incorporate its patent-protected DETERx technology platform for the treatment of chronic pain. The DETERx oral drug delivery technology is designed to provide extended-release delivery, unique abuse-deterrent properties, and flexible dose administration options.

CONTACT: Investor Contact:
         Doug Carlson
         Vice President, Corporate Development
Collegium Pharmaceutical