Deciphera Pharmaceuticals, Inc. (NASDAQ: DCPH), a biopharmaceutical company focused on discovering, developing, and commercializing important new medicines to improve the lives of people with cancer, today announced the pricing of an underwritten public offering of 5,251,239 shares of its common stock at a public offering price of $10.00 per share. In addition, in lieu of common stock to certain investors, Deciphera is offering pre-funded warrants to purchase 9,748,761 shares of its common stock at a purchase price of $9.99 per pre-funded warrant, which equals the public offering price per share of the common stock less the $0.01 exercise price per share of each pre-funded warrant. The aggregate gross proceeds to Deciphera from this offering are expected to be approximately $150 million, before deducting underwriting discounts and commissions and other estimated offering expenses. In addition, Deciphera has granted the underwriters a 30-day option to purchase up to an additional 2,250,000 shares of common stock at the public offering price per share of the common stock, less underwriting discounts and commissions. The offering is expected to close on April 29, 2022, subject to the satisfaction of customary closing conditions. All of the shares of common stock and pre-funded warrants are being offered by Deciphera.

Deciphera intends to use the net proceeds from the offering to continue to fund the development of vimseltinib including in its pivotal Phase 3 MOTION study of vimseltinib in tenosynovial giant cell tumor patients currently underway, additional clinical trials as well as clinical research outsourcing and manufacturing of clinical trial material and pre-commercial and medical affairs capabilities related to vimseltinib; to fund the development of DCC-3116 including multiple Phase 1b combination studies and potential Phase 2 expansion combination cohorts in multiple tumor types as well as clinical research outsourcing and manufacturing of clinical trial material; to fund the research and development of Deciphera’s pan-RAF program and other new research activities for potential drug candidates from its proprietary kinase switch control inhibitor platform; and the remainder for working capital purposes, including general operating expenses.

J.P. Morgan and Jefferies are acting as joint book-running managers for the offering.

The securities described above are being offered by Deciphera pursuant to a shelf registration statement on Form S-3 (No. 333-236389) that was declared effective by the Securities and Exchange Commission (SEC) on March 10, 2022. A preliminary prospectus supplement and accompanying prospectus relating to and describing the terms of the offering was filed with the SEC on April 26, 2022, and is available on the SEC’s website located at www.sec.gov. A copy of the final prospectus supplement and accompanying prospectus relating to the offering will be filed with the SEC and may be obtained, when available, by contacting: J.P. Morgan Securities LLC, c/o Broadridge Financial Solutions, 1155 Long Island Avenue, Edgewood, NY 11717, by telephone at 866-803-9204, or by email at [email protected]; or Jefferies LLC, Attention: Equity Syndicate Prospectus Department, 520 Madison Avenue, New York, NY 10022, by telephone at 877-821-7388 or by email at [email protected].

This press release does not constitute an offer to sell or the 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 that state or jurisdiction.