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Corporate Score 56 Neutral

Biogen Snaps Up Apellis Pharma For $5.6 Billion, But Biogen Dives As Apellis Soars

Mar 31, 2026 13:02 UTC
BIIB, APLS, XBI, IBB
Immediate term

Biogen Snaps Up Apellis Pharma For $5.6 Billion, But Biogen Dives As Apellis Soars.

  • Biogen is acquiring Apellis Pharma for $5.6 billion
  • Apellis shares are rising while Biogen shares are falling on the acquisition announcement

Biogen (BIIB) is bulking up its non-neurology profile with the $5.6 billion takeover of Apellis Pharmaceuticals (APLS). But Biogen stock slipped Tuesday following the announcement while Apellis shares soared. Adam Keeney, Biogen's executive vice president and head of corporate development, says it will probably take some time for analysts to wrap their heads around the story. Apellis sells Syfovre, a…

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