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    Co-Chief Executive Officer Thurmond Mark C. converted options into 16,730 shares and sold $178,352 worth of shares (5,577 units at $31.98), increasing direct ownership by 19% to 75,210 units (SEC Form 4)

    5/27/25 4:55:37 PM ET
    $TENB
    Computer Software: Prepackaged Software
    Technology
    Get the next $TENB 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*
    Thurmond Mark C.

    (Last) (First) (Middle)
    C/O TENABLE HOLDINGS, INC.
    6100 MERRIWEATHER DRIVE

    (Street)
    COLUMBIA MD 21044

    (City) (State) (Zip)
    2. Issuer Name and Ticker or Trading Symbol
    Tenable Holdings, Inc. [ TENB ]
    5. Relationship of Reporting Person(s) to Issuer
    (Check all applicable)
    X Director 10% Owner
    X Officer (give title below) Other (specify below)
    Co-Chief Executive Officer
    3. Date of Earliest Transaction (Month/Day/Year)
    05/22/2025
    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 05/22/2025 M 1,162 A $0 64,595 D
    Common Stock 05/22/2025 M 2,267 A $0 66,862 D
    Common Stock 05/22/2025 M 3,713 A $0 70,575 D
    Common Stock 05/22/2025 M 4,368 A $0 74,943 D
    Common Stock 05/23/2025 M 1,363 A $0 76,306 D
    Common Stock 05/23/2025 M 3,857 A $0 80,163 D
    Common Stock 05/23/2025 S(1) 5,577 D $31.98 75,210(2) 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
    Performance Restricted Stock Units (3) 05/22/2025 M 1,162 (4) (4) Common Stock 1,162 $0 8,140 D
    Performance Restricted Stock Units (3) 05/22/2025 M 2,267 (5) (5) Common Stock 2,267 $0 24,941 D
    Restricted Stock Units (3) 05/22/2025 M 3,713 (6) (6) Common Stock 3,713 $0 25,991 D
    Restricted Stock Units (3) 05/22/2025 M 4,368 (7) (7) Common Stock 4,368 $0 48,048 D
    Performance Restricted Stock Units (3) 05/23/2025 M 1,363 (8) (8) Common Stock 1,363 $0 4,091 D
    Restricted Stock Units (3) 05/23/2025 M 3,857 (9) (9) Common Stock 3,857 $0 11,571 D
    Explanation of Responses:
    1. The sale reported on this Form 4 represents shares required to be sold by the Reporting Person to cover tax withholding obligations in connection with the vesting of restricted stock units. The sale occurred automatically to satisfy the tax withholding obligations to be funded by a "sell to cover" transaction and does not represent a discretionary trade by the Reporting Person.
    2. 624 shares were acquired under the Issuer's Employee Stock Purchase Plan in transactions that were exempt under both Rule 16b-3(d) and Rule 16b-3(c).
    3. Each restricted stock unit ("RSU") represents a contingent right to receive one share of Issuer common stock.
    4. On February 21, 2024, the Compensation Committee of the Issuer's Board of Directors certified the achievement of the Performance Restricted Stock Units (PRSUs) granted on February 22, 2023 and determined a 93.9% payout for the measurement period based on the Issuer's fiscal year 2023 criteria. 25% of the shares underlying the PRSUs vested on February 22, 2024, with the remainder vesting in equal quarterly installments over 3 years, subject to the Reporting Person's continuous service with the Issuer as of the applicable vesting date, and subject to accelerated vesting in specified circumstances.
    5. On February 13, 2025, the Compensation Committee of the Issuer's Board of Directors certified the achievement of the Performance Restricted Stock Units (PRSUs) granted on February 22, 2024 and determined a 96.4% payout for the measurement period based on the Issuer's fiscal year 2024 criteria. 25% of the shares underlying the PRSUs will vest on February 22, 2025, with the remainder vesting in equal quarterly installments over 3 years, subject to the Reporting Person's continuous service with the Issuer as of the applicable vesting date, and subject to accelerated vesting in specified circumstances.
    6. 25% of the shares underlying the RSUs vested on February 22, 2024, with the remainder vesting in equal quarterly installments over 3 years, subject to the Reporting Person's continuous service with the Issuer as of the applicable vesting date, and subject to accelerated vesting in specified circumstances.
    7. 25% of the shares underlying the RSUs vested on February 22, 2025, with the remainder vesting in equal quarterly installments over 3 years, subject to the Reporting Person's continuous service with the Issuer as of the applicable vesting date, and subject to accelerated vesting in specified circumstances.
    8. On February 22, 2023, the Compensation Committee of the Issuer's Board of Directors certified the achievement of the Performance Restricted Stock Units (PRSUs) granted on February 23, 2022 and determined a 106% payout for the measurement period based on the Issuer's fiscal year 2022 criteria. 25% of the shares underlying the PRSUs vested on February 23, 2023, with the remainder vesting in equal quarterly installments over 3 years, subject to the Reporting Person's continuous service with the Issuer as of the applicable vesting date, and subject to accelerated vesting in specified circumstances.
    9. 25% of the shares underlying the RSUs vested on February 23, 2023, with the remainder vesting in equal quarterly installments over 3 years, subject to the Reporting Person's continuous service with the Issuer as of the applicable vesting date, and subject to accelerated vesting in specified circumstances.
    Remarks:
    /s/ David Bartholomew, Attorney-in-Fact 05/27/2025
    ** 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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