X0306 4 2013-10-24 1 0001576263 Mirati Therapeutics, Inc. MRTX 0001191935 TANG CAPITAL PARTNERS LP 4747 EXECUTIVE DRIVE, SUITE 510 SAN DIEGO CA 92121 0 0 1 0 0001178579 TANG KEVIN C 4747 EXECUTIVE DRIVE, SUITE 510 SAN DIEGO CA 92121 0 0 1 0 0001232621 TANG CAPITAL MANAGEMENT LLC 4747 EXECUTIVE DRIVE, SUITE 510 SAN DIEGO CA 92121 0 0 1 0 Common Stock 2013-10-24 4 P 0 57143 17.50 A 1238543 D The securities are held by Tang Capital Partners, LP. Kevin C. Tang is the sole manager of Tang Capital Management, LLC, which is the general partner of Tang Capital Partners, LP. Mr. Tang disclaims beneficial ownership of the securities except to the extent of his pecuniary interest therein. /s/ Kevin C. Tang, Managing Member of Tang Capital Management LLC, the General Partner of Tang Capital Partners LP 2013-10-28 /s/ Kevin C. Tang 2013-10-28 /s/ Kevin C. Tang, Managing Member 2013-10-28