Deal facts
- Buyer
- Biogen Inc.
- Target
- Apellis Pharmaceuticals, Inc.
- Deal value
- Not disclosed
- Announced
- 31 March 2026
- Status
- Completed
- Sector
- Healthcare
- Country
- United States
- Consideration
- cash, earn-out
Sources
Biogen Inc. has agreed to acquire Apellis Pharmaceuticals, Inc. in a going private transaction valued at an undisclosed sum. The deal, announced on 31 March 2026, involves a consideration structure comprising cash and an earn-out component. Both the buyer and the target are based in the United States within the healthcare sector. The transaction was completed on 14 May 2026, marking the end of Apellis as a publicly listed entity.
The acquisition allows Biogen to integrate Apellis into its broader portfolio of therapeutic assets. No specific financial figures were reported for the final transaction value. Regulatory approvals were obtained to facilitate the completion of the deal within the specified timeframe. The transaction is now fully concluded with no further conditions pending.
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1 update- CompletedClosed
Biogen Inc. completes acquisition of Apellis Pharmaceuticals, Inc.
Introductory Note As previously disclosed, on March 31, 2026, Apellis Pharmaceuticals, Inc., a Delaware corporation (the “Company”), entered into an Agreement and Plan of Merger (the “Merger Agreement”) with Biogen Inc., a Delaware corporation (“Biogen”), and Aspen Purchaser Sub, Inc., a Delaware corporation and a wholly owned subsidiary of Biogen (“Purchaser”). Pursuant to the Merger Agreement, o
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Buyer history
Biogen Inc.
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