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    Senior Vice President and CFO Piontek Gregg converted options into 84,169 shares and covered exercise/tax liability with 42,079 shares, increasing direct ownership by 5% to 919,326 units (SEC Form 4)

    6/3/25 6:21:23 PM ET
    $NPKI
    Metal Fabrications
    Industrials
    Get the next $NPKI alert in real time by email
    SEC FORM 4 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*
    Piontek Gregg

    (Last) (First) (Middle)
    9320 LAKESIDE BOULEVARD
    SUITE 100

    (Street)
    THE WOODLANDS TX 77381

    (City) (State) (Zip)
    2. Issuer Name and Ticker or Trading Symbol
    NPK International Inc. [ NPKI ]
    5. Relationship of Reporting Person(s) to Issuer
    (Check all applicable)
    Director 10% Owner
    X Officer (give title below) Other (specify below)
    Senior Vice President and CFO
    3. Date of Earliest Transaction (Month/Day/Year)
    06/01/2025
    4. If Amendment, Date of Original Filed (Month/Day/Year)
    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 06/01/2025 M 43,790 A $0.0(1) 921,026 D
    Common Stock 06/01/2025 F 17,231(2) D $8.09 903,795 D
    Common Stock 06/01/2025 F 15,889(2) D $8.09 887,906 D
    Common Stock 06/01/2025 F 8,959(2) D $8.09 878,947 D
    Common Stock 06/01/2025 M 40,379 A $0.0(1) 919,326 D
    Common Stock 65,000 I by IRA(3)
    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
    Restricted Stock Units $0.0(1) 06/01/2025 M 43,790 (4) (4) Common Stock 43,790 $0.0 80,758 D
    Restricted Stock Units $0.0(1) 06/01/2025 M 40,379 (4) (4) Common Stock 40,379 $0.0 40,379 D
    Explanation of Responses:
    1. Restricted stock units convert into common stock on a one-for-one basis.
    2. Represents shares withheld to satisfy tax withholding obligations upon the vesting of restricted stock units.
    3. These shares are indirectly held by Trust.
    4. Grant of restricted stock units that vest in one-third increments on June 1 of each subsequent year after grant and settle in shares.
    By: M. Celeste Fruge For: Gregg S. Piontek 06/03/2025
    ** 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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