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flag Novo Nordisk to buy global rights to Omeros’ rare disease drug zaltenibart for up to $2.1 billion.

flag Novo Nordisk has agreed to acquire exclusive global rights to Omeros’ experimental drug zaltenibart, a MASP-3 inhibitor for rare blood and kidney disorders, in a deal worth up to $2.1 billion. flag The agreement includes a $340 million upfront payment and potential milestone payments. flag Zaltenibart, which has shown safety and tolerability in early trials for paroxysmal nocturnal hemoglobinuria, will enter a global phase 3 development program under Novo’s leadership, with plans to explore additional rare disease applications. flag The transaction, expected to close in the fourth quarter of 2025, follows positive trial results and Omeros’ continued pursuit of regulatory approval for its other drug, narsoplimab. flag Omeros retains rights to certain preclinical MASP-3 programs and saw its shares rise over 100% after the announcement.

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