Foresite Capital Entities Expand Ownership in Alumis

Several Foresite Capital–affiliated investment entities have increased their ownership in Alumis Inc. through a coordinated series of common stock purchases, adding to positions already held across a range of funds and management vehicles.

The transactions took place on January 8, 2026, with shares acquired at a consistent price of $17 each. The activity was reported by Foresite Capital Management VI LLC, which serves as a director of Alumis, along with multiple related funds and affiliated managers within the Foresite Capital and Foresite Labs platforms. All reported holdings are indirect, reflecting the institutional structure through which the firm manages its investments.

Two of the disclosed purchases accounted for roughly 118,000 shares and 294,000 shares, respectively. After these transactions, the reporting entities collectively held several million shares of Alumis common stock. The filing also details additional positions already in place across other affiliated funds, offering a comprehensive view of Foresite’s exposure to the company through its broader investment network.

Ownership of the shares is spread across limited partnerships, opportunity funds, co-investment vehicles, and affiliated entities. In most cases, voting and investment authority rests with the corresponding management companies. James B. Tananbaum, who serves in senior management roles across these entities, is identified as exercising control over investment decisions for the funds involved. Each reporting party clarified that it does not view itself as part of a formal ownership group beyond its specific economic interest.

No derivative securities or option-based transactions were included in the disclosure, keeping the focus squarely on direct equity ownership. The filing also notes that it was submitted alongside other related disclosures covering similar transactions by additional affiliated parties, together providing a fuller picture of recent ownership changes.

Taken as a whole, the transactions highlight a continued buildup of Alumis shares across Foresite-managed vehicles, executed through established fund structures and reported in a consolidated manner consistent with institutional investment practices.