Alumis Inc. Watch

from S-3 17 pages Alumis Inc. and , as Warrant Agent Form of Debt Securities Warrant Agreement Dated as of Alumis Inc. Form of Debt Securities Warrant Agreement

from S-3 19 pages Alumis Inc. and , as Warrant Agent Form of Preferred Stock Warrant Agreement Dated as of Alumis Inc. Form of Preferred Stock Warrant Agreement

from S-3 20 pages Alumis Inc. and , as Warrant Agent Form of Common Stock Warrant Agreement Dated as of Alumis Inc. Form of Common Stock Warrant Agreement

from S-3 54 pages Alumis Inc., Issuer and [Trustee], Trustee Indenture Dated as of [•], 20__ Debt Securities

from 10-K 5 pages Description of the Registrant’s Securities Registered Pursuant to Section 12 of the Securities Exchange Act of 1934

from S-1/A 2 pages ★ D El Awa R E ★ Seal Alumis Inc. Corporate January 29, 2021 Fully Paid and Nonassessable Shares of Common Stock, $0.0001 Par Value Per Share, of Alumis Inc. Transferable on the Books of the Corporation in Person or by Duly Authorized Attorney Upon Surrender of This Certificate Properly Endorsed. This Certificate Is Not Valid Until Countersigned by the Transfer Agent and Registered by the Registrar. Witness the Facsimile Seal of the Corporation and the Facsimile Signatures of Its Duly Authorized Officers. Dated: This Certifies That Is the Record Holder of Incorporated Under the Laws of the State of Delaware President & Chief Executive Officer Cusip 022307 10 2 See Reverse for Certain Definitions and Legends Countersigned and Registered: Equiniti Trust Company, LLC Transfer Agent and Registrar By: Authorized Signature Chief Financial Officer

from S-1 46 pages Amended and Restated Investors’ Rights Agreement

from DRS/A 46 pages Amended and Restated Investors’ Rights Agreement