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NASDAQ:MTSR 30 October 2025 - 21 November 2025

Metsera (MTSR) Delists as Pfizer Closes Up to $10 Billion Obesity Drug Deal – All the Key Updates on November 17, 2025

Metsera (MTSR) Delists as Pfizer Closes Up to $10 Billion Obesity Drug Deal – All the Key Updates on November 17, 2025

Pfizer’s acquisition of Metsera, Inc. is now effectively complete, Metsera’s stock has been delisted, major index providers are removing the name, and antitrust scholars are using the failed Novo Nordisk bid as a case study in “attempted monopolization.” Here’s a full rundown of what matters today, 17 November 2025, for anyone following Metsera, MTSR, or the obesity‑drug arms race.
Metsera (MTSR) Sinks as Pfizer Seals Revised $10B Buyout; 8‑K Spells Out $65.60 Cash + Up to $20.65 CVR — Nov. 10, 2025

Metsera (MTSR) Sinks as Pfizer Seals Revised $10B Buyout; 8‑K Spells Out $65.60 Cash + Up to $20.65 CVR — Nov. 10, 2025

Shares of Metsera, Inc. slumped on Monday after the obesity‑drug developer said it will proceed with a sweetened takeover by Pfizer that ends a high‑stakes bidding war with Novo Nordisk. Metsera accepted Pfizer’s revised offer late Friday; Novo dropped out over the weekend. In early U.S. trading today, MTSR fell ~15% as investors recalibrated expectations around the final deal structure.
Metsera (MTSR) Stock Soars 20% Amid $10B Bidding War – Pfizer vs Novo Nordisk Face Off

Metsera (MTSR) Stock Soars 20% Amid $10B Bidding War – Pfizer vs Novo Nordisk Face Off

Metsera’s stock has been on a meteoric rise in recent weeks, capped by a 20% jump on November 4, 2025 alonereuters.comreuters.com. The share price is now hovering in the low $70sreuters.com, a remarkable increase from just around $30–$33 in mid-September before any takeover talks emergedprnewswire.com. In fact, over the past 52 weeks the stock ranged from a low of about $12.30 to a new high of $73.60 set on November 4reuters.com – reflecting hundreds of percent in gains for early investors.
Novo Nordisk (NVO) Stock Tanks as Weight-Loss Empire Faces Boardroom Coup and Fierce Rivalry

Novo Nordisk’s $9B Shock Bid Snatches US Weight-Loss Biotech from Pfizer – Stocks React Big

Novo’s takeover push marks a sudden escalation in the weight-loss drug wars. The Danish company – maker of Wegovy and Ozempic – broke ranks on Oct. 30 by notifying Metsera’s board of its superior bidreuters.com. This move comes just days after the foundation coup at Novoreuters.com, signaling a full-aggression strategy. Metsera confirmed the offer is “superior” to Pfizer’s, giving Pfizer four business days to respondts2.tech. Pfizer CEO Albert Bourla has publicly talked up this obesity play, so Pfizer is not likely to concede easily. Unsurprisingly, Pfizer immediately denounced Novo’s counterbid as “reckless” and vowed to defend the original agreementreuters.com. Observers note Novo carefully included the contingent CVRs and claims it adhered to the “no raid” clause in its agreement with Pfizerreuters.com, so the fight may end up in arbitration if no private settlement is reached.
Metsera Stock Skyrockets as Pfizer-Novo Clash in $9B Bidding War

Metsera Stock Skyrockets as Pfizer-Novo Clash in $9B Bidding War

Metsera’s share price has been on a roller-coaster amid takeover speculation. In late September, Pfizer agreed to buy Metsera for $47.50 per share in cash plus up to $22.50 in contingent paymentssec.gov. Pfizer CEO Albert Bourla said this deal “propels Pfizer into this key therapeutic area” of obesity treatmentsec.gov. Metsera CEO Whit Bernard called the deal “an excellent outcome for our shareholders” and praised the chance to “realize the promise of improved human health at scale” under Pfizer’s wingsec.gov.
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