Xencor Inc. Watch

from 8-K 11 pages Form of Pre-Funded Warrant to Purchase Common Stock

from S-3ASR 51 pages Xencor, Inc. Subordinated Debt Securities Indenture Dated as of Trustee

from S-3ASR 50 pages Xencor, Inc. Senior Debt Securities Indenture Dated as of Trustee

from 10-K 3 pages Description of Common Stock

from S-3ASR 16 pages Xencor, Inc. and , as Warrant Agent Form of Debt Securities Warrant Agreement Dated as of Xencor, Inc. Form of Debt Securities Warrant Agreement Article 1 Issuance of Warrants and Execution And

from S-3ASR 18 pages Xencor, Inc. and , as Warrant Agent Form of Preferred Stock Warrant Agreement Dated as of Xencor, Inc. Form of Preferred Stock Warrant Agreement Article 1 Issuance of Warrants and Execution and Delivery of Warrant Certificates

from S-3ASR 17 pages Xencor, Inc. and , as Warrant Agent Form of Common Stock Warrant Agreement Dated as of Xencor, Inc. Form of Common Stock Warrant Agreement Article 1 Issuance of Warrants and Execution and Delivery of Warrant Certificates

from S-3ASR 49 pages [Corporation], Issuer and [Trustee], Trustee Indenture Dated as of [·], 20 Debt Securities

from S-3 22 pages Xencor, Inc. and , as Warrant Agent Form of Debt Securities Warrant Agreement Dated as of [ ], 20 Xencor, Inc. Form of Debt Securities Warrant Agreement

from S-3 24 pages Xencor, Inc. and , as Warrant Agent Form of Preferred Stock Warrant Agreement Dated as of [ ], 20 Xencor, Inc. Form of Preferred Stock Warrant Agreement

from S-3 23 pages Xencor, Inc. and , as Warrant Agent Form of Common Stock Warrant Agreement Dated as of [ ], 20 Xencor, Inc. Form of Common Stock Warrant Agreement

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

from S-3 22 pages Xencor, Inc. and , as Warrant Agent Form of Debt Securities Warrant Agreement Dated as of [ ], 20 Xencor, Inc. Form of Debt Securities Warrant Agreement

from S-3 24 pages Xencor, Inc. and , as Warrant Agent Form of Preferred Stock Warrant Agreement Dated as of [ ], 20 Xencor, Inc. Form of Preferred Stock Warrant Agreement

from S-3 23 pages Xencor, Inc. and , as Warrant Agent Form of Common Stock Warrant Agreement Dated as of [ ], 20 Xencor, Inc. Form of Common Stock Warrant Agreement

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

from S-1/A 1 page This Certifies That Is the Owner of Cusip Dated Countersigned and Registered: Computershare Trust Company, N.A. Transfer Agent and Registrar, Fully-Paid and Non-Assessable Shares of Common Stock of Xencor, Inc. (Hereinafter Called the “Company”), Transferable on the Books of the Company in Person or by Duly Authorized Attorney, Upon Surrender of This Certificate Properly Endorsed. This Certificate and the Shares Represented Hereby, Are Issued and Shall Be Held Subject to All of the Provisions of the Certificate of Incorporation, as Amended, and the By-Laws, as Amended, of the Company (Copies of Which Are on File With the Company and With the Transfer Agent), to All of Which Each Holder, by Acceptance Hereof, Assents. This Certificate Is Not Valid Unless Countersigned and Registered by the Transfer Agent and Registrar. Witness the Facsimile Seal of the Company and the Facsimile Signatures of Its Duly Authorized Officers. Common Stock Par Value $0.01 Common Stock This Certificate Is Transferable in Canton, Ma, Jersey City, Nj and College Station, Tx See Reverse for Certain Definitions Certificate Number Shares . Xencor, Inc. Incorporated Under the Laws of the State of Delaware President and Chief Executive Officer Secretary by Authorized Signature

from S-1 39 pages Xencor, Inc. Third Amended and Restated Investor Rights Agreement

from DRS 39 pages Xencor, Inc. Third Amended and Restated Investor Rights Agreement