Metsera (MTSR) News Today, 21 November 2025: Pfizer’s $10 Billion Buyout, $6 Billion Bond Sale and What It Means for Investors
Pfizer has closed its up to $10 billion acquisition of Metsera and raised $6 billion in bonds to help fund the deal. Here’s what today’s developments mean for former Metsera shareholders, Pfizer investors and the future of the obesity drug market. The main fresh headline for 21 November 2025 is on the financing side, not on Metsera’s standalone stock — because MTSR no longer trades.