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    Amendment: SVP, Chief Scientific Officer Belvin Marcia was granted 92,500 shares, increasing direct ownership by 53% to 268,148 units (SEC Form 4)

    2/10/25 5:58:43 PM ET
    $CTMX
    Biotechnology: Pharmaceutical Preparations
    Health Care
    Get the next $CTMX alert in real time by email
    SEC FORM 4/A SEC Form 4
    FORM 4 UNITED STATES SECURITIES AND EXCHANGE COMMISSION
    Washington, D.C. 20549

    STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

    Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
    or Section 30(h) of the Investment Company Act of 1940
    OMB APPROVAL
    OMB Number: 3235-0287
    Estimated average burden
    hours per response: 0.5
      
    Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
      
    Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.
    1. Name and Address of Reporting Person*
    BELVIN MARCIA

    (Last) (First) (Middle)
    C/O CYTOMX THERAPEUTICS, INC.
    151 OYSTER POINT BLVD., STE. 400

    (Street)
    SOUTH SAN FRANCISCO CA 94080

    (City) (State) (Zip)
    2. Issuer Name and Ticker or Trading Symbol
    CytomX Therapeutics, Inc. [ CTMX ]
    5. Relationship of Reporting Person(s) to Issuer
    (Check all applicable)
    Director 10% Owner
    X Officer (give title below) Other (specify below)
    SVP, Chief Scientific Officer
    3. Date of Earliest Transaction (Month/Day/Year)
    02/04/2025
    4. If Amendment, Date of Original Filed (Month/Day/Year)
    02/06/2025
    6. Individual or Joint/Group Filing (Check Applicable Line)
    X Form filed by One Reporting Person
    Form filed by More than One Reporting Person
    Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
    1. Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4)
    Code V Amount (A) or (D) Price
    Common Stock 02/04/2025 A 35,000(1)(2) A $0 210,648(1) D
    Common Stock 02/04/2025 A 57,500(3) A $0 268,148(1)(4) D
    Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
    (e.g., puts, calls, warrants, options, convertible securities)
    1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year) 3A. Deemed Execution Date, if any (Month/Day/Year) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 6. Date Exercisable and Expiration Date (Month/Day/Year) 7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4)
    Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares
    Stock Option (Right to Buy) $0.864 02/04/2025 A 150,000(1) (5) 02/03/2035 Common Stock 150,000(1) $0 150,000(1) D
    Stock Option (Right to Buy) $0.864 02/04/2025 A 115,000 (6) 02/03/2035 Common Stock 115,000 $0 115,000 D
    Explanation of Responses:
    1. The Form 4 filed by the Reporting Person on February 6, 2025 incorrectly reflected the number of securities acquired in Box 4 of Table I and Box 5 of Table II and consequently the amount beneficially owned reflected in Box 5 of Table I and Box 9 of Table II. The number of securities acquired and the amount beneficially owned following reported transactions has been adjusted in this Form 4/A to correct the aforementioned errors. Except as otherwise noted in this footnote, all other information disclosed in the Reporting Person's original Form 4 was accurately reported.
    2. Constitute restricted stock units ("RSUs") for which the Reporting Person is entitled to receive one (1) share of Common Stock for each RSU upon vesting. 1/3rd of the RSUs vest annually on March 15 of each year, with the first 1/3rd vesting on March 15, 2026, subject to the Reporting Person continuing as a service provider through each such date.
    3. Constitute RSUs for which the Reporting Person is entitled to receive one (1) share of Common Stock for each RSU upon vesting. 50% of the RSUs vest annually on March 15 of each year, with the first 50% vesting on March 15, 2026, subject to the Reporting Person continuing as a service provider through each such date.
    4. Includes 201,666 RSUs.
    5. 1/48th of the shares subject to the option vest on each monthly anniversary measured from February 4, 2025 (the "Vesting Commencement Date"), such that 100% of the shares subject to the option will be fully vested and exercisable on the fourth anniversary of the Vesting Commencement Date, subject to the Reporting Person's continued service to the Issuer through each such date.
    6. 1/24th of the shares subject to the option vest on each monthly anniversary measured from the Vesting Commencement Date, such that 100% of the shares subject to the option will be fully vested and exercisable on the second anniversary of the Vesting Commencement Date, subject to the Reporting Person's continued service to the Issuer through each such date.
    /s/ Lloyd Rowland, as Attorney-in-Fact for Marcia Belvin 02/10/2025
    ** Signature of Reporting Person Date
    Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
    * If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
    ** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
    Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
    Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
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