X0306 4 2017-01-06 0 0001576263 Mirati Therapeutics, Inc. MRTX 0001465837 Boxer Capital, LLC 11682 EL CAMINO REAL, SUITE 320 SAN DIEGO CA 92130 0 0 1 0 0001015747 LEWIS JOSEPH C/O CAY HOUSE P.O. BOX N-7776 E.P. TAYLOR DRIVE LYFORD CAY NEW PROVIDENCE C5 BAHAMAS 0 0 1 0 0001465836 Boxer Asset Management Inc. C/O CAY HOUSE P.O. BOX N-7776 E.P. TAYLOR DRIVE LYFORD CAY NEW PROVIDENCE C5 BAHAMAS 0 0 1 0 0001468223 MVA Investors, LLC 11682 EL CAMINO REAL, SUITE 320 SAN DIEGO CA 92130 0 0 1 0 0001579826 LAPPE RODNEY W 4660 LA JOLLA VILLAGE DRIVE, SUITE 500 SAN DIEGO CA 92121 0 0 1 0 0001266427 LIEBERBURG IVAN M 11682 EL CAMINO REAL, SUITE 320 SAN DIEGO CA 92130 0 0 1 0 0001465914 Davis Aaron I. 11682 EL CAMINO REAL, SUITE 320 SAN DIEGO CA 92130 0 0 1 0 0001465834 Reisman Neil 11682 EL CAMINO REAL, SUITE 320 SAN DIEGO CA 92130 0 0 1 0 0001663609 Dissanayake Shehan Bharatha 11682 EL CAMINO REAL, SUITE 320 SAN DIEGO CA 92130 0 0 1 0 0001465835 Fuglesang Christopher 11682 EL CAMINO REAL, SUITE 320 SAN DIEGO CA 92130 0 0 1 0 Common Stock 2017-01-06 4 P 0 280059 5.60 A 1037994 D Common Stock 2017-01-06 4 P 0 6104 5.60 A 435444 D Common Stock 30518 D Common Stock 13131 D Common Stock 37241 D Common Stock 77038 D Common Stock 87052 D Warrant (right to purchase) 0.001 2017-01-06 4 P 0 2341786 5.599 A 2017-01-06 Common Stock 2341786 2341786 D Warrant (right to purchase) 0.001 2017-01-06 4 P 0 51047 5.599 A 2017-01-06 Common Stock 51047 51047 D These securities are owned directly by Boxer Capital, LLC ("Boxer Capital"), which may be deemed to be a member of a "group" for purposes of Section 13(d) of the Securities Exchange Act of 1934, as amended, consisting of (i) Braslyn Ltd. ("Braslyn"), (ii) Boxer Capital, (iii) Boxer Asset Management Inc. ("Boxer Management"), (v) MVA Investors, LLC ("MVA Investors"), (vi) Joe Lewis, (vii) Rodney W. Lappe, (viii) Ivan M. Lieberburg, (ix) Aaron I. Davis, (x) Neil Reisman, (xi) Shehan B. Dissanayake, and (xii) Christopher Fuglesang (collectively, the "Boxer Group), and indirectly by Boxer Management and Messrs. (Continued from Footnote 1) Lewis, Fuglesang, Reisman, Lieberburg, Dissanayake and Davis, by virtue of their ownership in Boxer Capital. Each of Messrs. Fuglesang, Reisman, Lieberburg, Dissanayake and Davis is a member of Boxer Capital. Each member of the Boxer Group other than Boxer Capital disclaims beneficial ownership of these securities to the extent it or he does not have a pecuniary interest therein. These securities are owned directly and solely by MVA Investors, which has sole voting and dispositive power with respect to these securities. Each of Messrs. Fuglesang, Reisman, Lieberburg, Dissanayake and Davis is a member of MVA Investors. Each member of the Boxer Group other than MVA Investors disclaims beneficial ownership of these securities to the extent it or he does not have a pecuniary interest therein. These securities are owned directly by Christopher Fuglesang, who may be deemed to be a member of the Boxer Group, and includes 11,436 shares received in connection with the pro rata distribution by Boxer Capital to its members on March 16, 2016 (the "Boxer Capital Pro Rata Distribution"). These securities are owned directly by Neil Reisman, who may be deemed to be a member of the Boxer Group, and includes 4,921 shares received in connection with the Boxer Capital Pro Rata Distribution. These securities are owned directly by Ivan M. Lieberburg, who may be deemed to be a member of the Boxer Group, and includes 34,981 shares received in connection with the Boxer Capital Pro Rata Distribution. These securities are owned directly by Shehan B. Dissanayake, who may be deemed to be a member of the Boxer Group, and includes 28,869 shares received in connection with the Boxer Capital Pro Rata Distribution. These securities are owned directly by Aaron I. Davis, who may be deemed to be a member of the Boxer Group, and includes 32,622 shares received in connection with the Boxer Capital Pro Rata Distribution. The warrants do not have an expiration date and are not exercisable to the extent that, following exercise of such warrants, the warrant holder and its affiliates would beneficially own more than 19.99% of the issuer's common stock. Boxer Capital, LLC, By: /s/ Aaron Davis, Aaron Davis 2017-01-10 Boxer Asset Management Inc., By: /s/ Jefferson Voss, Jefferson Voss 2017-01-10 MVA Investors, LLC, By: /s/ Aaron Davis, Aaron Davis 2017-01-10 Joseph Lewis, /s/ Joseph Lewis, Joseph Lewis 2017-01-10 Rodney W. Lappe, By: /s/ Rodney W. Lappe, Rodney W. Lappe 2017-01-10 Ivan M. Lieberburg, By: /s/ Ivan M. Lieberburg, Ivan M. Lieberburg 2017-01-10 Aaron I. Davis, By: /s/ Aaron I. Davis, Aaron I. Davis 2017-01-10 Neil Reisman, By: /s/ Neil Reisman, Neil Reisman 2017-01-10 Shehan B. Dissanayake, By: /s/ Shehan B. Dissanayake, Shehan B. Dissanayake 2017-01-10 Christopher Fuglesang, By: /s/ Christopher Fuglesang, Christopher Fuglesang 2017-01-10