Blackstone Life Sciences and Anthos Therapeutics Announce Novartis has Completed the Acquisition of Anthos Therapeutics in a Deal Valued at up to $3.1B, with $925M Paid Upfront

On April 3, 2025 Blackstone Life Sciences and Anthos Therapeutics, Inc., a transformative, clinical-stage biopharmaceutical company developing innovative therapies for the treatment of cardiometabolic diseases, reported that Novartis has completed its acquisition of Anthos Therapeutics in a transaction valued at up to $3.1 billion (Press release, Novartis, APR 3, 2025, View Source [SID1234651798]).

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Anthos was founded by Blackstone Life Sciences and Novartis in 2019 with the exclusive global rights from Novartis to develop, manufacture, and commercialize abelacimab, a novel Factor XI inhibitor that originated at Novartis. Abelacimab is currently in Phase 3 clinical development for the prevention of stroke and systemic embolism in patients with atrial fibrillation (LILAC-TIMI 76), in addition to two phase 3 studies in patients with cancer-associated thrombosis (ASTER and MAGNOLIA). Data from these trials are expected in the second half of 2026.

Transaction Details

Anthos shareholders will receive up to $3.1 billion in total deal value, including an upfront payment of $925 million, and payments in the event certain regulatory and commercial milestones are achieved.

Advisors

Goldman Sachs & Co. LLC acted as the lead financial advisor to Anthos. Morgan Stanley & Co. LLC also served as a financial advisor, and Goodwin Procter LLP served as legal advisor to Anthos.