X0306 4 2015-05-28 0 0001607678 Viking Therapeutics, Inc. VKTX 0000886163 LIGAND PHARMACEUTICALS INC 11119 NORTH TORREY PINES ROAD, SUITE 200 LA JOLLA CA 92037 0 0 1 0 Common Stock 2015-05-28 4 J 0 228105 0.00 A 4780964 D The shares of Common Stock were acquired as partial consideration for licenses granted to the Issuer by Ligand Pharmaceuticals Incorporated ("Ligand") pursuant to the Master License Agreement, dated May 21, 2014, among Ligand, Metabasis Therapeutics, Inc. ("Metabasis"), a wholly-owned subsidiary of Ligand, and the Issuer, as amended by the First Amendment to Master License Agreement, dated September 6, 2014 and the Second Amendment to Master License Agreement, dated April 8, 2015. Includes 55,060 shares acquired by Metabasis. Includes 882,474 shares held by Metabasis. /s/ Charles S. Berkman 2015-06-01