Rigel Pharmaceuticals, Inc. is a biotechnology company. The Company is engaged in discovering, developing and providing therapies that improve the lives of patients with hematologic disorders and cancer. The Company's lead product, TAVALISSE (fostamatinib disodium hexahydrate) tablets, the spleen tyrosine kinase (SYK) inhibitor, for the treatment of adult patients with chronic immune thrombocytopenia (ITP). Its product also includes REZLIDHIA (olutasidenib) capsules, which are for the treatment of adult patients with relapsed or refractory (R/R) acute myeloid leukemia (AML) with a susceptible isocitrate dehydrogenase-1 (IDH1) mutation. Its other clinical programs include its interleukin receptor-associated kinase (IRAK) inhibitor program and a receptor-interacting serine/threonine-protein kinase (RIPK1) inhibitor program in clinical development. In addition, it has product candidates in clinical development with partners BerGenBio ASA (BerGenBio) and Daiichi Sankyo (Daiichi).