Mirati Therapeutics Announces Closing Of Public Offering Of Common Stock And Full Exercise Of Underwriters' Option To Purchase Additional Shares

SAN DIEGO, Jan. 14, 2020 /PRNewswire/ -- Mirati Therapeutics, Inc. (Nasdaq: MRTX) today announced the closing of its previously announced underwritten public offering of 3,538,462 shares of its common stock at a public offering price of $97.50 per share. This includes the exercise in full by the underwriters of their option to purchase up to 461,538 additional shares of common stock. The aggregate gross proceeds to Mirati from this offering were approximately $345.0 million, before deducting underwriting discounts and commissions and estimated offering expenses payable by Mirati.

Goldman Sachs & Co. LLC, SVB Leerink and Cowen and Company, LLC acted as joint book-running managers in the offering. Credit Suisse acted as lead manager in the offering. JonesTrading Institutional Services LLC acted as a co-manager in the offering.

The shares of common stock described above were offered by Mirati pursuant to a shelf registration statement filed by Mirati with the Securities and Exchange Commission ("SEC") that became automatically effective upon filing. A final prospectus supplement and accompanying prospectus relating to the offering were filed with the SEC and are available on the SEC's website located at http://www.sec.gov. Copies of the final prospectus supplement and the accompanying prospectus relating to the offering may be obtained from Goldman Sachs & Co. LLC, Attention: Prospectus Department, 200 West Street, New York, NY 10282, or by telephone at (866) 471-2526, or by email at prospectus-ny@ny.email.gs.com; or from SVB Leerink LLC, Attention: Syndicate Department, One Federal Street, 37th Floor, Boston, MA 02110, or by telephone at (800) 808-7525, ext. 6132, or by email at syndicate@svbleerink.com; or from Cowen and Company, LLC, c/o Broadridge Financial Solutions, Attn: Prospectus Department, 1155 Long Island Avenue, Edgewood, NY 11717, or by telephone at (833) 297-2926, or by email at PostSaleManualRequests@broadridge.com.

This press release shall 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 other jurisdiction in which such offer, solicitation or sale would be unlawful prior to the registration or qualification under the securities laws of any such state or other jurisdiction.

About Mirati Therapeutics

Mirati Therapeutics is a San Diego-based clinical-stage biotechnology company dedicated to advancing novel therapeutics that extend the lives of patients by directly addressing the genetic and immunological drivers of cancer. Mirati's lead drug candidate, sitravatinib, is designed to selectively target a spectrum of tyrosine kinases implicated in both tumor growth and the suppression of immune responses to tumors. Sitravatinib has demonstrated durable responses in lung cancer patients whose cancer has progressed despite treatment with checkpoint inhibitors - an area of significant unmet medical need. Sitravatinib is being evaluated in multiple clinical trials to treat patients who are refractory to prior immune checkpoint inhibitor therapy, including a potentially registration-enabling Phase 3 trial of sitravatinib in combination with a checkpoint inhibitor in non-small cell lung cancer (NSCLC) that is currently enrolling patients.

Mirati is also developing novel inhibitors of KRAS mutations including MRTX849, a potent and selective inhibitor of KRAS G12C. This previously difficult to drug target is present in approximately 14% of NSCLC adenocarcinomas, 4% of colorectal cancer as well as smaller percentages of several other difficult-to-treat cancers. MRTX849 is being evaluated in a Phase 1/2 clinical trial as a treatment for patients with KRAS G12C-positive tumors. Our research on G12C has led to breakthroughs in targeting other KRAS mutations including G12D which drives tumor growth in more patients than G12C and includes pancreatic, colorectal and other types of cancer.

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SOURCE Mirati Therapeutics, Inc.