X0206 3 2016-01-14 0 0001576263 Mirati Therapeutics, Inc. MRTX 0001663609 Dissanayake Shehan Bharatha 440 STEVENS AVE, SUITE 100 SOLANA BEACH CA 92075 0 0 1 0 Common Stock 48169 D Common Stock 1232093 I See Footnote Common Stock 429340 I See Footnote Warrant (right to purchase) 7.86 2017-11-21 Common Stock 189780 D Warrant (right to purchase) 7.86 2017-11-21 Common Stock 78186 D These securities are owned directly by the reporting person, who 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) Boxer Capital, LLC ("Boxer Capital"), (ii) Boxer Asset Management Inc. ("Boxer Management"), (iii) MVA Investors, LLC ("MVA Investors"), (iv) Braslyn Ltd., (v) Joe Lewis, (vi) the reporting person, (vii) Christopher Fuglesang, (viii) Rodney W. Lappe, (ix) Ivan M. Lieberburg, (x) Aaron I. Davis, (xi) Neil Reisman, (xii) Peter E. Harwin, and (xiii) William N. Harwin 2012 Gift Trust F/B/O Peter Harwin. The reporting person is a member of Boxer Capital. On January 14, 2016, Boxer Capital transferred 791,139 shares of the common stock of the issuer, pro rata for no consideration as part of an internal reorganization. These securities are owned directly by Boxer Capital, and indirectly by the reporting person, Boxer Management and Joe Lewis, by virtue of their ownership in Boxer Capital. The reporting person disclaims beneficial ownership of these securities to the extent he does not have a pecuniary interest therein. On January 14, 2016, Boxer Capital transferred 791,139 shares of the common stock of the issuer, pro rata for no consideration as part of an internal reorganization. These securities are owned directly and solely by MVA Investors, which has sole voting and dispositive power with respect to these securities. The reporting person is a member of MVA Investors. The reporting person disclaims beneficial ownership of these securities to the extent he does not have a pecuniary interest therein. The warrants are not exercisable to the extent that, following exercise of such warrants, the warrant holder would beneficially own more than 19.99% of the issuer's common stock. These securities are owned directly and solely by MVA Investors. The reporting person disclaims beneficial ownership of these securities to the extent he does not have a pecuniary interest therein. /s/ Shehan B. Dissanayake 2016-01-15