Pfizer has filed a lawsuit against Novo Nordisk and Metsera, following Novo Nordisk's last-minute bid to acquire Metsera, which Pfizer termed "reckless and unprecedented".
The lawsuit comes after Novo Nordisk intercepted Pfizer's September 2025 acquisition deal for Metsera, offering up to $9bn, a value that trumped Pfizer's offer of up to $7.3bn.
Novo Nordisk's bid was considered a "superior company proposal" by Metsera.
The move is part of a larger M&A bidding war for the obesity-focused biotech.
Author's summary: Pfizer sues Novo Nordisk and Metsera over acquisition bid.