Form 8937

During the year ended December 31, 2014, Paratek Pharmaceuticals, Inc., took certain organizational actions that affected the basis of holders of our securities. The Forms 8937 included [below] summarize the impact of those changes and were filed with the Internal Revenue Service. Prior to October 30, 2014, the name of the Company was Transcept Pharmaceuticals, Inc. (“Transcept”). On October 30, 2014, Transcept completed its business combination with Paratek Pharmaceuticals, Inc. (“Old Paratek”) in accordance with the terms of the Agreement and Plan of Merger and Reorganization, dated as of June 30, 2014, by and among Transcept, Tigris Merger Sub, Inc. (“Merger Sub”), Tigris Acquisition Sub, LLC (“Merger LLC”) and Paratek (the “Merger Agreement”), pursuant to which Merger Sub merged with and into Paratek, with Paratek surviving as a wholly-owned subsidiary of Transcept (the “Merger”), followed by the merger of Paratek with and into Merger LLC, with Merger LLC surviving as a wholly-owned subsidiary of Transcept. Also on October 30, 2014, in connection with, and prior to the completion of, the Merger, Transcept effected a 1-for-12 reverse stock split of its common stock (the “Reverse Stock Split”), and immediately following the Merger, Transcept changed its name to “Paratek Pharmaceuticals, Inc.”, and Merger LLC changed its name to “Paratek Pharma, LLC.” Following the completion of the Merger, the business conducted by Paratek Pharmaceuticals Inc. became primarily the business conducted by Paratek.

Immediately prior to the Merger, Old Paratek sold 8,068,766 shares of its common stock for an aggregate purchase price of $93.0 million to certain existing Paratek stockholders and certain new investors in Paratek (the “Financing”). Immediately prior to the closing of the Financing, the $6.0 million in aggregate principal amount outstanding under, and all accrued interest on, certain notes payable issued in 2014 converted into 1,335,632 shares of Old Paratek’s common stock based on a conversion price of $0.778 per share. Further, and also immediately prior to the closing of the Financing, each share of Old Paratek’s preferred stock outstanding at that time was converted into shares of Old Paratek’s common stock at a ratio determined in accordance with Paratek’s certificate of incorporation then in effect.

Under the terms of the Merger Agreement, Transcept issued shares of its common stock to Old Paratek’s stockholders, at an exchange rate of 0.0675 shares of common stock, after taking into account the Reverse Stock Split, in exchange for each share of Old Paratek common stock outstanding immediately prior to the Merger.