ALUMIS INC. Form 4 Filing

This filing details transactions by Foresite Labs, LLC and Foresite Labs Affiliates 2021, LLC, which are considered 10% owners of ALUMIS INC. (ALMS). The transactions, occurring on April 1, 2026, primarily involved in-kind distributions and acquisitions of common stock, with a transaction price of $0.00 per share. These actions are noted as pro rata distributions to members, exempt from certain reporting requirements under the Exchange Act. Post-transaction, the ownership stakes of these entities in ALUMIS INC. are reflected in the reported post-transaction shares, with specific holdings detailed in accompanying footnotes which clarify the nature of ownership and reporting for various Foresite entities, including funds and limited liability companies, and the roles of James B. Tananbaum and other individuals.