Alumis and Acelyrin merge, with $737 million cash runway

7 February 2025

Alumis (Nasdaq: ALMS) and Acelyrin (Nasdaq: SLRN) have agreed to merge in an all-stock deal, creating a late-stage biopharmaceutical company focused on immune-mediated diseases.

The combined company will operate under the Alumis name and be led by Alumis’ current executive team, with key Acelyrin personnel joining to oversee its lead program, lonigutamab.

Under the merger terms, Alumis shareholders will own around 55% of the combined entity, while Acelyrin shareholders will hold approximately 45%.

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