X0508 4 2023-08-11 0001576263 Mirati Therapeutics, Inc. MRTX 0001465837 Boxer Capital, LLC 12860 EL CAMINO REAL SUITE 300 SAN DIEGO CA 92130 true See remarks 0001465836 Boxer Asset Management Inc. 12860 EL CAMINO REAL SUITE 300 SAN DIEGO CA 92130 true See remarks 0001015747 LEWIS JOSEPH C/O CAY HOUSE EP TAYLOR DRIVE N7776, LYFORD CAY NEW PROVIDENCE BAHAMAS true See remarks 0001468223 MVA Investors, LLC 12860 EL CAMINO REAL SUITE 300 SAN DIEGO CA 92130 true See remarks 0001465914 Davis Aaron I. 12860 EL CAMINO REAL, SUITE 300 SAN DIEGO CA 92130 true See remarks 0001663609 Dissanayake Shehan Bharatha 11682 EL CAMINO REAL, SUITE 320 SAN DIEGO CA 92130 true See remarks 0001465835 Fuglesang Christopher 11682 EL CAMINO REAL, SUITE 320 SAN DIEGO CA 92130 true See remarks false Common Stock 2023-08-11 4 P 0 57533 27.8 A 287866 I See Footnote Common Stock 2023-08-11 4 P 0 1201440 27.8 A 3201440 D Common Stock 47517 I See Footnote Common Stock 3135966 I See Footnote These securities are owned directly by MVA Investors, LLC ("MVA Investors"). Aaron I. Davis is a member of and has voting and dispositive power over securities held by MVA Investors. Each reporting person other than MVA Investors disclaims beneficial ownership of these securities except to the extent of such person's pecuniary interest therein, if any. These securities are owned directly by Boxer Capital, LLC ("Boxer Capital"). Boxer Asset Management Inc. ("Boxer Management") is the managing member of Boxer Capital. Joseph Lewis is the sole indirect owner of Boxer Management. Each of Messrs. Fuglesang, Dissanayake and Davis is a member of Boxer Capital. Each reporting person other than Boxer Capital disclaims beneficial ownership of these securities except to the extent of such person's pecuniary interest therein, if any. These securities are owned directly by Mr. Davis. Each reporting person other than Mr. Davis disclaims beneficial ownership of these securities. These securities are owned directly by Braslyn Ltd. Mr. Lewis is the sole indirect owner of Braslyn Ltd. Each reporting person other than Mr. Lewis disclaims beneficial ownership of these securities. The reporting persons may be deemed members of a group that beneficially owns more than 10% of the outstanding shares of common stock, $0.001 par value per share, of Mirati Therapeutics, Inc. /s/ Aaron I. Davis, Chief Executive Officer, Boxer Capital, LLC 2023-08-15 /s/ Aaron I. Davis, Chief Executive Officer, MVA Investors, LLC 2023-08-15 /s/ Paul Higgs, Director, Boxer Asset Management Inc. 2023-08-15 /s/ Joseph C. Lewis 2023-08-15 /s/ Aaron I. Davis 2023-08-15 /s/ Christopher Fuglesang 2023-08-15 /s/ Shehan B. Dissanayake 2023-08-15