ALUMIS INC. 4

Bradley Mark Christopher, Chief Development Officer of Alumis Inc. (ALMS), sold 2,572 shares of common stock on August 3, 2026 in a non‑discretionary sell‑to‑cover transaction at a weighted average price of about $26.37 per share.

On August 3, 2026, Bradley Mark Christopher, Chief Development Officer of Alumis Inc., sold 2,572 shares of Alumis common stock in a sell‑to‑cover transaction at a weighted average price of approximately $26.37 per share, generating proceeds of about $67,900 to cover tax obligations arising from the vesting and settlement of restricted stock units granted on July 29, 2025; this transaction was executed under the issuer’s automatic sell‑to‑cover policy and is described as non‑discretionary. Following the sale, he retained direct ownership of 48,533 Alumis common shares (including 2,377 shares previously acquired via the company’s 2024 Employee Stock Purchase Plan), and he also has indirect beneficial ownership of two separate 20,026‑share blocks of common stock held by GRATs (JB 2025 GRAT and MB 2025 GRAT) for which he serves as trustee, bringing his total direct and indirect economic exposure to approximately 88,585 shares. The reported sale price represents a weighted average for multiple trades executed between $25.60 and $26.42 per share, and the filing emphasizes that detailed trade‑by‑trade pricing information is available upon request from the issuer, any security holder, or the SEC staff.

Filing Facts

CIK

1847367

Ticker

ALMS

Form

4

Source Type

fda

Accession

0002023657-26-000005

Alert Tier

5