Equillium, Inc., a clinical-stage biotechnology company, develops therapeutics to treat severe autoimmune and inflammatory, or immuno-inflammatory disorders in the United States. The company develops EQ504, a novel AhR modulator that is in preclinical-stage for the treatment of ulcerative colitis and lung inflammation diseases. It also develops EQ302, a bi-specific inhibitor of IL-15 and IL-21 formulated for oral delivery for the treatment of celiac diseases. The company was formerly known as Attenuate Biopharmaceuticals, Inc. and changed its name to Equillium, Inc. in May 2017. Equillium, Inc. was incorporated in 2017 and is headquartered in La Jolla, California.