Pfizer Sues Novo, Metsera Again in Brewing Buyout Clash (1)

Nov. 3, 2025, 9:23 PM UTC

Pfizer Inc. accused Novo Nordisk A/S of trying to stifle competition in the weight-loss market by attempting to acquire obesity startup Metsera Inc., the second lawsuit Pfizer has filed in four days as it tries to retain its grip on a deal Novo upended last week.

Pfizer brought its latest complaint Monday in Delaware federal court on antitrust grounds, saying it seeks to “stop Novo Nordisk from illegally paying off Metsera and its controlling stockholders to gain control of, and impair and potentially kill, an emerging US competitor.” Metsera called Pfizer’s new arguments “nonsense” and Novo called them “absurd” ...

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