Omeros Corporation, a clinical-stage biopharmaceutical company, discovers, develops, and commercializes small-molecule and protein therapeutics, and orphan indications targeting immunologic diseases. The company's lead products candidate is the Narsoplimab (OMS721/MASP-2) for the treatment of hematopoietic stem-cell transplant-associated thrombotic microangiopathy (TA-TMA); and in Phase II clinical trial to treat COVID-19 and acute respiratory distress syndrome. It also develops OMS1029 that has completed phase I clinical trials for mannan-binding lectin-associated serine protease 2 (MASP-2) and lectin pathway disorders; and OMS527 that is in phase I clinical trials for addictions and compulsive disorders, and movement disorders, as well as cocaine use disorder. In addition, the company's products under preclinical development comprise MASP-2, a pro-inflammatory protein target for the treatment of lectin pathway disorders; MASP-3 small-molecule inhibitors for alternative pathway disorders; OncotoX-AML, to treat acute myeloid leukemia; and Targeted Complement Activating Therapy, for Multidrug-resistant organisms. Omeros Corporation was incorporated in 1994 and is headquartered in Seattle, Washington. Show more

The Omeros Building, Seattle, WA, 98119, United States

https://www.omeros.com

Biotechnology

Healthcare

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Market Cap

974.1M

52 Wk Range

$2.95 - $17.65

Previous Close

$13.52

Open

$13.52

Volume

1,523,877

Day Range

$13.04 - $13.92

Enterprise Value

1.041B

Cash

171.8M

Avg Qtr Burn

-39.84M

Insider Ownership

2.80%

Institutional Own.

46.78%

Qtr Updated

12/31/25

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Drug & Indication	Stage & Event	Catalyst Date
Narsoplimab (OMS721) Details Hematopoietic stem cell transplant-associated thrombotic microangiopathy (TA-TMA)	Approved Update	Some catalyst date You must sign up to see the catalyst details. You must sign up to see the catalyst details. You must sign up to see the catalyst details. You must sign up to see the catalyst details.Sign up now.
OMIDRIA (phenylephrine and ketorolac intraocular solution) Details Eye disease	Approved Quarterly sales	Some catalyst date You must sign up to see the catalyst details. You must sign up to see the catalyst details. You must sign up to see the catalyst details. You must sign up to see the catalyst details.Sign up now.
Zaltenibart/OMS906 [MASP-3 inhibitor Antibody] Details Paroxysmal nocturnal hemoglobinuria	Phase 3 Update	Some catalyst date You must sign up to see the catalyst details. You must sign up to see the catalyst details. You must sign up to see the catalyst details. You must sign up to see the catalyst details.Sign up now.
Zaltenibart/OMS906 [MASP-3 inhibitor Antibody] Details Blood disorder, C3 Glomerulopathy	Phase 2 Update	Some catalyst date You must sign up to see the catalyst details. You must sign up to see the catalyst details. You must sign up to see the catalyst details. You must sign up to see the catalyst details.Sign up now.
OMS405 (PPARγ agonist) Details Addiction	Phase 2 Update	Some catalyst date You must sign up to see the catalyst details. You must sign up to see the catalyst details. You must sign up to see the catalyst details. You must sign up to see the catalyst details.Sign up now.
OMS527 (PDE7 inhibitor) Details Cocaine use disorder	Phase 1b Initiation	Some catalyst date You must sign up to see the catalyst details. You must sign up to see the catalyst details. You must sign up to see the catalyst details. You must sign up to see the catalyst details.Sign up now.
OMS1029 (MASP-2) Details Lectin pathway disorder	Phase 1 Update	Some catalyst date You must sign up to see the catalyst details. You must sign up to see the catalyst details. You must sign up to see the catalyst details. You must sign up to see the catalyst details.Sign up now.
OncotoX-AML (Oncology Therapeutic) Details Acute Myeloid Leukemia	Phase 1 Initiation	Some catalyst date You must sign up to see the catalyst details. You must sign up to see the catalyst details. You must sign up to see the catalyst details. You must sign up to see the catalyst details.Sign up now.
Narsoplimab (MASP-2 inhibitor, lectin pathway) Details Blood disorder, Rare diseases	Failed Discontinued	Some catalyst date You must sign up to see the catalyst details. You must sign up to see the catalyst details. You must sign up to see the catalyst details. You must sign up to see the catalyst details.Sign up now.
Narsoplimab (MASP-2 inhibitor, lectin pathway) Details Kidney disease, Diabetic macular edema, Diabetes	Failed Discontinued	Some catalyst date You must sign up to see the catalyst details. You must sign up to see the catalyst details. You must sign up to see the catalyst details. You must sign up to see the catalyst details.Sign up now.
Narsoplimab (MASP-2 inhibitor, lectin pathway) Details Kidney disease, IgA nephropathy	Failed Discontinued	Some catalyst date You must sign up to see the catalyst details. You must sign up to see the catalyst details. You must sign up to see the catalyst details. You must sign up to see the catalyst details.Sign up now.