XOMA Corporation operates as a biotech royalty aggregator in the United States and the Asia Pacific. It has a portfolio of economic rights to future potential milestone and royalty payments associated with partnered commercial and pre-commercial therapeutic candidates. The company also focuses on early to mid-stage clinical assets primarily in Phase 1 and 2 with commercial sales potential that are licensed to partners; and acquires milestone and royalty revenue streams on late-stage clinical or commercial assets. It has a portfolio with various assets. XOMA Corporation was incorporated in 1981 and is headquartered in Emeryville, California.