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    Amendment: SEC Form SCHEDULE 13G/A filed by Xencor Inc.

    8/14/25 1:29:35 PM ET
    $XNCR
    Biotechnology: Pharmaceutical Preparations
    Health Care
    Get the next $XNCR alert in real time by email



    SECURITIES AND EXCHANGE COMMISSION
    Washington, D.C. 20549


    SCHEDULE 13G


    UNDER THE SECURITIES EXCHANGE ACT OF 1934
    (Amendment No. 17)


    Xencor, Inc.

    (Name of Issuer)


    COM

    (Title of Class of Securities)


    98401F105

    (CUSIP Number)


    06/30/2025

    (Date of Event Which Requires Filing of this Statement)


    Check the appropriate box to designate the rule pursuant to which this Schedule is filed:
    Checkbox checked   Rule 13d-1(b)
    Checkbox not checked   Rule 13d-1(c)
    Checkbox not checked   Rule 13d-1(d)






    SCHEDULE 13G

    CUSIP No.
    98401F105


    1Names of Reporting Persons

    PRIMECAP MANAGEMENT CO/CA/
    2Check the appropriate box if a member of a Group (see instructions)

    Checkbox not checked  (a)
    Checkbox not checked  (b)
    3Sec Use Only
    4Citizenship or Place of Organization

    UNITED STATES
    Number of Shares Beneficially Owned by Each Reporting Person With:
    5Sole Voting Power

    10,527,322.00
    6Shared Voting Power

    0.00
    7Sole Dispositive Power

    10,527,322.00
    8Shared Dispositive Power

    0.00
    9Aggregate Amount Beneficially Owned by Each Reporting Person

    10,527,322.00
    10Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

    Checkbox not checked
    11Percent of class represented by amount in row (9)

    14.79 %
    12Type of Reporting Person (See Instructions)

    IA


    SCHEDULE 13G

    Item 1. 
    (a)Name of issuer:

    Xencor, Inc.
    (b)Address of issuer's principal executive offices:

    465 North Halstead Street, Suite 200, Pasadena, CALIFORNIA 91107
    Item 2. 
    (a)Name of person filing:

    PRIMECAP MANAGEMENT CO/CA/
    (b)Address or principal business office or, if none, residence:

    177 EAST COLORADO BLVD. 11TH FLOOR PASADENA, California 91105
    (c)Citizenship:

    PRIMECAP MANAGEMENT CO/CA/ - UNITED STATES
    (d)Title of class of securities:

    COM
    (e)CUSIP No.:

    98401F105
    Item 3.If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:
    (a)Checkbox not checked   Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);
    (b)Checkbox not checked   Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
    (c)Checkbox not checked   Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
    (d)Checkbox not checked   Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
    (e)Checkbox checked   An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
    (f)Checkbox not checked   An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
    (g)Checkbox not checked   A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
    (h)Checkbox not checked   A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
    (i)Checkbox not checked   A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
    (j)Checkbox not checked   A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J),
           please specify the type of institution:
    (k)Checkbox not checked   Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
     
    Item 4.Ownership
    (a)Amount beneficially owned:

    10,527,322
    (b)Percent of class:

    14.79  %
    (c)Number of shares as to which the person has:
     (i) Sole power to vote or to direct the vote:

    PRIMECAP MANAGEMENT CO/CA/ - 10,527,322

     (ii) Shared power to vote or to direct the vote:

    PRIMECAP MANAGEMENT CO/CA/ - 0

     (iii) Sole power to dispose or to direct the disposition of:

    PRIMECAP MANAGEMENT CO/CA/ - 10,527,322

     (iv) Shared power to dispose or to direct the disposition of:

    PRIMECAP MANAGEMENT CO/CA/ - 0

    Item 5.Ownership of 5 Percent or Less of a Class.
     
    Item 6.Ownership of more than 5 Percent on Behalf of Another Person.
     
    If any other person is known to have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, such securities, a statement to that effect should be included in response to this item and, if such interest relates to more than 5 percent of the class, such person should be identified. A listing of the shareholders of an investment company registered under the Investment Company Act of 1940 or the beneficiaries of employee benefit plan, pension fund or endowment fund is not required.


    Various Persons have the right to receive, or the power to direct the receipt of, dividends from, or proceeds from the sale of, with respect to the securities as to which this Schedule is filed. No one Person here has an interest more than five percent of this class of securities except as follows: PRIMECAP Odyssey Aggressive Growth Fund has an interest of more than five percent of the total outstanding common stock of Xencor, Inc.
    Item 7.Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
     
    Not Applicable
    Item 8.Identification and Classification of Members of the Group.
     
    Not Applicable
    Item 9.Notice of Dissolution of Group.
     
    Not Applicable

    Item 10.Certifications:
     
    By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under ?? 240.14a-11.

        SIGNATURE 
     
    After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

     
    PRIMECAP MANAGEMENT CO/CA/
     
    Signature:Jorge A. Rodriguez
    Name/Title:Deputy Chief Compliance Officer
    Date:08/13/2025
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