Headlines

Pfizer sues Metsera, Novo Nordisk over rival obesity drug bid

Published by Global Banking & Finance Review

Posted on October 31, 2025

2 min read

· Last updated: January 21, 2026

Add as preferred source on Google
Pfizer sues Metsera, Novo Nordisk over rival obesity drug bid
Global Banking & Finance Awards 2026 — Call for Entries

(Reuters) -Pfizer said on Friday it had filed a lawsuit against Metsera and Novo Nordisk , saying Metsera breached its merger agreement obligations in declaring the Danish drugmaker's $8.5 billion bid

Pfizer Files Lawsuit Against Metsera and Novo Nordisk Over Obesity Drug

Pfizer's Legal Challenge in the Obesity Drug Market

(Reuters) -Pfizer said on Friday it had filed a lawsuit against Metsera and Novo Nordisk , saying Metsera breached its merger agreement obligations in declaring the Danish drugmaker's $8.5 billion bid for the U.S. obesity drug developer to be a superior offer.

Details of the Lawsuit

Pfizer asked the Delaware court where it filed the lawsuit to issue a temporary restraining order to block Metsera from terminating the agreement. The lawsuit was not immediately available in the court's electronic filing system.

Market Implications

Metsera has given Pfizer until Tuesday to raise its offer.

Responses from Metsera and Novo Nordisk

Pfizer said its suit says that Novo's bid is an illegal attempt by a dominant company in the market to bypass antitrust scrutiny and carries significant regulatory risks.

The legal action comes as Pfizer received early antitrust clearance for its proposed $7.3 billion acquisition of Metsera from the U.S. Federal Trade Commission. It granted early termination of the waiting period under the Hart-Scott-Rodino Act, more than a week ahead of the November 7 deadline.

Pfizer, which does not currently sell a weight-loss drug, is trying to enter the fast-growing obesity market projected to reach $150 billion by the early 2030s.

The company has faced setbacks in developing its own treatments and is looking to offset falling COVID-related revenue and looming patent expirations.

Novo Nordisk, maker of Wegovy and Ozempic, is seeking to regain ground lost to Eli Lilly, whose drugs Zepbound and Mounjaro have shown stronger clinical results.

Metsera's pipeline includes experimental GLP-1 and amylin-based therapies that analysts say could generate $5 billion in peak sales.

Metsera and Novo did not immediately reply to Reuters' requests for comment.

(Reporting by Kamal Choudhury, Christy Santhosh and Siddhi Mahatole in Bengaluru; Editing by Shilpi Majumdar and Anil D'Silva)

Key Takeaways

  • Pfizer files lawsuit against Metsera and Novo Nordisk.
  • Metsera's $8.5 billion bid deemed superior by Pfizer.
  • Pfizer seeks to block Metsera from terminating agreement.
  • Novo Nordisk's bid raises antitrust concerns.
  • Pfizer aims to enter the growing obesity drug market.

Frequently Asked Questions

What is a merger agreement?
A merger agreement is a legal document that outlines the terms and conditions under which two companies agree to combine their operations into a single entity.
What is antitrust scrutiny?
Antitrust scrutiny refers to the examination and regulation of business practices to prevent monopolies and promote competition in the marketplace.
What is a temporary restraining order?
A temporary restraining order is a court order that temporarily prohibits an individual or entity from taking a specific action, often used to maintain the status quo during legal proceedings.
What is an acquisition?
An acquisition is the process of one company purchasing another company, either through buying its shares or assets, to gain control over it.
What is the Hart-Scott-Rodino Act?
The Hart-Scott-Rodino Act is a U.S. law that requires companies to file pre-merger notifications with the Federal Trade Commission and the Department of Justice to allow for antitrust review.

Tags

Related Articles

More from Headlines

Explore more articles in the Headlines category