Omeros Corporation, a clinical-stage biopharmaceutical company, discovers, develops, and commercializes small-molecule and protein therapeutics, and orphan indications targeting inflammation, complement-mediated diseases, cancers, and addictive and compulsive disorders.

The company's clinical programs include Narsoplimab (OMS721/MASP-2) that has completed pivotal studies for hematopoietic stem-cell transplant-associated thrombotic microangiopathy (HSCT-TMA); that is in Phase III clinical trial for immunoglobulin A nephropathy (IgAN); and Phase II clinical trial to treat COVID-19.

It also develops OMS1029 that is in phase I clinical trials for long-acting second-generation antibody targeting lectin pathway disorders; OMS906 that is in phase Ib clinical trials for Paroxysmal nocturnal hemoglobinuria, complement 3 glomerulopathy, and other alternative pathway disorders; OMS527 that is in phase I clinical trials for addictions and compulsive disorders, and movement disorders; and OMS405 that is in phase II clinical trials for opioid and nicotine addiction.

In addition, the company develops MASP-2-small-molecule inhibitors for the treatment of aHUS, HSCT-TMA, and age-related macular degeneration; GPR174 inhibitors and chimeric antigen receptor T-Cell and adoptive T-Cell therapies for various cancers; and G protein-coupled receptors for treating immunologic, immuno-oncologic, metabolic, CNS, cardiovascular, musculoskeletal, and other disorders.

Omeros Corporation was incorporated in 1994 and is headquartered in Seattle, Washington.