0000886163 2022-09-30 2022-09-30 0000886163 dei:FormerAddressMember 2022-09-30 2022-09-30 0000886163 false 8-K 2022-09-30 LIGAND PHARMACEUTICALS INC DE 001-33093 77-0160744 3911 Sorrento Valley Boulevard Suite 110 San Diego CA 92121 858 550-7500 5980 Horton Street Suite 405 Emeryville CA 94608 false false false false Common Stock, par value $0.001 per share LGND NASDAQ false