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Pfizer Completes Acquisition of Metsera, Inc.

| 8-K

Summary

On November 13, 2025, Pfizer Inc. completed its acquisition of Metsera, Inc. through a merger. As a result, Metsera, Inc.'s common stock ceased trading on Nasdaq and was delisted. The board of directors of Metsera, Inc. resigned, and new directors from Pfizer's subsidiary were appointed. Additionally, Pfizer issued contingent value rights to certain shareholders based on the achievement of specified milestones related to the development of Metsera's products.

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M&A Transaction Partial Buyout Voluntary Delisting Transfer of Listing Changes in Control of Registrant Board Member Departure Board Member Appointed Convertible Notes Offering

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