Apellis Pharmaceuticals develops therapies that target the complement system, a part of the immune system involved in inflammation and disease. The company focuses on complement inhibition to treat rare and debilitating conditions with unmet medical needs. Its approach centers on therapies that precisely modulate the complement cascade to help patients. Apellis went public in 2017 to fund its research and development efforts, and in 2025 it formed a strategic partnership with Sobi to sell ex-US royalties on its drug Aspaveli for up to $300 million, providing capital and expanding global reach. Compared with competitors, Apellis pursues targeted complement modulation and leverages strategic partnerships and royalties to support its growth. The company's goal is to advance effective, targeted treatments that improve the lives of patients worldwide by addressing diseases driven by the complement system.
Company Size
501-1,000
Company Stage
Acquired
Total Funding
$1.7B
Headquarters
Waltham, Massachusetts
Founded
2008
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