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Biogen Acquires Apellis Pharmaceuticals for $

Apellis Pharmaceuticals acquired by Biogen

Acquisition$5,600,000,000Hospitals and Health CareUS

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Acquired

Apellis Pharmaceuticals

United StatesHospitals and Health Care

Deal value

$5,600,000,000

March 31, 2026

Biogen logo
Acquirer

Biogen

Biotechnology Research

Biogen has acquired Apellis Pharmaceuticals for $5.6 billion, marking a significant expansion in its therapeutic portfolio. Apellis Pharmaceuticals is committed to developing transformative therapies for people living with a broad range of debilitating diseases by controlling complement, a key part of the body’s immune system. Its work is rooted centrally at C3, the only target in the complement cascade that addresses all three pathways that can drive disease, offering broad platform potential to treat many conditions where patients have few or no treatment options available.

This strategic acquisition is expected to enhance Biogen's presence in several critical therapeutic areas. Apellis's programs span ophthalmology, nephrology, hematology, and neurology, providing Biogen with a diverse pipeline of potential treatments. The integration of Apellis's C3-targeting platform is anticipated to complement Biogen's existing research and development efforts, particularly in complex neurological and immunological disorders.

The synergy between the two companies is projected to accelerate the development and commercialization of innovative therapies. Biogen's established global infrastructure and expertise in bringing specialized treatments to market are expected to support the advancement of Apellis's promising drug candidates. This combination aims to leverage Apellis's scientific innovation with Biogen's operational scale to address unmet medical needs more effectively.

Looking ahead, the combined entity is positioned to strengthen its leadership in the biopharmaceutical landscape. By integrating Apellis's unique approach to complement inhibition with Biogen's resources, the acquisition is intended to deliver new therapeutic options to patients across a wider spectrum of debilitating diseases, ultimately aiming to improve patient outcomes globally.

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