ALUMIS INC. — Director's Dealing 2025

Aug 1, 2025

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: ALUMIS INC. (ALMS)
CIK: 0001847367
Period of Report: 2025-07-29

Reporting Person: Babler Martin (N/A)

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2025-07-29	Stock Option (Right to Buy)	$3.95	A	662000	Acquired	2035-07-28	Common Stock (662000)	Direct
2025-07-29	Stock Option (Right to Buy)	$3.95	A	150000	Acquired	2035-07-28	Common Stock (150000)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	3000	Direct
Common Stock	106454	Indirect

Footnotes

F1: Includes 3,000 shares acquired on May 20, 2025 under the Issuer's 2024 Employee Stock Purchase Plan.

F2: Shares are held directly by Martin Babler revocable trust UAD October 25, 2006, for which Reporting Person serves as a trustee.

F3: 25% of the shares underlying this option vest on July 29, 2026, and the remaining shares vest in equal monthly installments thereafter over the following 36 months, subject to the Reporting Person's Continuous Service (as defined in the Issuer's 2024 Equity Incentive Plan) to the Issuer on each such vesting date.