Mark Christopher Bradley, Chief Development Officer of Alumis Inc., filed a Form 4 on November 4, 2026, disclosing a sell-to-cover transaction in Alumis common stock on November 2, 2026.

Key Highlights

  • Transaction: 623 shares of Alumis Inc. common stock were disposed of on November 2, 2026, with transaction code S.
  • Weighted average price: Shares were sold at a weighted average price of $6.52, in multiple transactions ranging from $6.42 to $6.52 per share, according to the filing.
  • Sell-to-cover: The filing states the sale "was effected pursuant to the Issuer's policy requiring sell-to-cover to satisfy tax obligations" tied to RSUs granted on July 29, 2025, and "does not represent a discretionary sale by the Reporting Person."
  • Direct ownership after transaction: Following the reported transaction, Bradley Mark Christopher directly held 47,910 shares of common stock.
  • Indirect holdings: The reporting person also holds 20,026 shares indirectly through JB 2025 GRAT and 20,026 shares indirectly through MB 2025 GRAT, for each of which he serves as trustee.
  • GRAT transfers: According to the filing, both GRAT holdings of 20,026 shares each were transferred from predecessor GRATs on October 30, 2025.

Alumis CDO Files Sell-to-Cover Disclosure Following RSU Vesting

Bradley Mark Christopher, identified in the filing as Chief Development Officer of Alumis Inc. (NASDAQ:ALMS), reported the disposition of 623 shares of common stock on November 2, 2026. The filing describes the transaction as a sell-to-cover sale required under the company's own policy to satisfy tax obligations arising from the vesting and settlement of restricted stock units originally granted on July 29, 2025. The filing explicitly states this "does not represent a discretionary sale by the Reporting Person."

The shares were sold in multiple transactions at prices ranging from $6.42 to $6.52 per share, with a weighted average sale price of $6.52 reported in the filing. The reporting person noted that full details on the number of shares sold at each individual price within that range are available upon request to the issuer, any security holder, or SEC staff.

Following the reported transaction, Christopher directly held 47,910 shares of Alumis common stock. In addition, the filing shows two indirect holdings of 20,026 shares each, held through the JB 2025 GRAT and the MB 2025 GRAT, for both of which he serves as trustee. The filing notes that each block of 20,026 shares was transferred from a corresponding 2023 GRAT on October 30, 2025. No derivative securities transactions were reported. The form was signed by Sanam Pangali as Attorney-in-Fact on November 4, 2026.

What Was Disclosed

Alumis Inc.'s Chief Development Officer disclosed a mandatory sell-to-cover disposal of 623 common shares at a weighted average price of $6.52 on November 2, 2026, related to RSU vesting, leaving direct beneficial ownership of 47,910 shares plus 40,052 shares held indirectly through two GRATs.