Tranche Update on Omeros Corporation's Equity Buyback Plan announced on April 1, 2024.

Omeros Corporation is a biopharmaceutical company. The Company is focused on discovering, developing and commercializing small-molecule and protein therapeutics for large-market and orphan indications targeting immunologic disorders, including complement-mediated diseases, cancers, and addictive and compulsive disorders. Its lead MASP-2 inhibitor, narsoplimab, targets the lectin pathway of complement and is the subject of a biologics license application pending before FDA for the treatment of hematopoietic stem cell transplant-associated thrombotic microangiopathy. Its long-acting MASP-2 inhibitor, OMS1029, is in a phase I multi-ascending-dose clinical trial. OMS906, its inhibitor of MASP-3, the key activator of the alternative pathway of complement, is advancing in clinical programs for paroxysmal nocturnal hemoglobinuria and complement 3 glomerulopathy. The Company’s lead phosphodiesterase 7 inhibitor OMS527 is in clinical development for the treatment of cocaine use disorders.