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Biogen's $5.6 billion acquisition of Apellis strengthens product portfolio

Mar 31, 2026, 7:01 AM EDT2 sourcesAI-analyzed

Why it may matterVerify against the original reporting

The acquisition provides Biogen with immediate revenue and enhances growth prospects, likely leading to a favorable market response.

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What happened, with direct paths to the underlying reporting

Biogen has entered a definitive agreement to acquire Apellis for $41 per share, totaling $5.6 billion. This acquisition is expected to drive significant revenue growth from two immunology products, EMPAVELI and SYFOVRE, which collectively generated $689 million in revenue in 2025 and are projected to grow substantially through 2028.

Biogen to acquire Apellis for $41 per share, totaling $5.6 billion.
The acquisition adds EMPAVELI and SYFOVRE to Biogen's portfolio, boosting revenue.
Combined revenue for EMPAVELI and SYFOVRE in 2025 was $689 million, expected to grow.
Apellis enhances Biogen's commercial infrastructure and nephrology capabilities.
Biogen anticipates accretive EPS growth starting in 2027 from the deal.

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