XOMA Corporation (XOMA) is a biotechnology royalty aggregator. The Company's drug royalty aggregator business is focused on early to mid-stage clinical assets primarily in Phase I and II. XOMA acquires pre-commercial therapeutic candidates that is licensed to pharmaceutical or biotechnology companies. Its product candidates include PTH1R, a G-protein-coupled receptor involved in the regulation of calcium metabolism; XMetA, an insulin receptor-activating antibody, and X213, an allosteric inhibitor of prolactin action. It has a range of antibody discovery and development technologies, which includes antibody discovery advanced platform technologies (ADAPT), ModulX and OptimX. The ADAPT technology includes phage display libraries integrated with yeast and mammalian display. Its ModulX technology enables the identification of allosteric antibodies for positive or negative modulation of biological pathways. The OptimX technology is used for optimizing biophysical properties of antibodies.