X0306 4 2022-11-01 1 0001893653 OmniAb Operations, Inc. NONE 0000886163 LIGAND PHARMACEUTICALS INC 3911 SORRENTO VALLEY BOULEVARD, SUITE 110 SAN DIEGO CA 92121 0 0 1 0 Common Stock 2022-11-01 4 J 0 16859308 0.00 D 0 D In connection with the separation of the Issuer from the Reporting Person on November 1, 2022, the Reporting Person distributed all of the shares of Common Stock of the Issuer in the form of a dividend to its stockholders. /s/ Andrew Reardon, Chief Legal Officer and Secretary of Ligand Pharmaceuticals Incorporated 2022-11-03