Mark C. Thurmond - 23 Feb 2026 Form 4 Insider Report for Tenable Holdings, Inc. (TENB)

Role
Co-Chief Executive Officer, Director
Signature
/s/ David Bartholomew, Attorney-in-Fact
Issuer symbol
TENB
Transactions as of
23 Feb 2026
Net transactions value
-$373,499
Form type
4
Filing time
25 Feb 2026, 16:06:13 UTC
Previous filing
25 Nov 2025
Next filing
27 Feb 2026
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Thurmond Mark C. Co-Chief Executive Officer, Director C/O TENABLE HOLDINGS, INC., 6100 MERRIWEATHER DRIVE, COLUMBIA /s/ David Bartholomew, Attorney-in-Fact 25 Feb 2026 0001651579

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction TENB Common Stock Options Exercise $0 +1,365 +1.2% $0.000000 115,004 23 Feb 2026 Direct
transaction TENB Common Stock Tax liability $7,038 -401 -0.35% $17.55 114,603 23 Feb 2026 Direct F1
transaction TENB Common Stock Options Exercise $0 +1,162 +1% $0.000000 115,765 23 Feb 2026 Direct
transaction TENB Common Stock Tax liability $6,002 -342 -0.3% $17.55 115,423 23 Feb 2026 Direct F1
transaction TENB Common Stock Options Exercise $0 +2,267 +2% $0.000000 117,690 23 Feb 2026 Direct
transaction TENB Common Stock Tax liability $11,688 -666 -0.57% $17.55 117,024 23 Feb 2026 Direct F1
transaction TENB Common Stock Options Exercise $0 +3,857 +3.3% $0.000000 120,881 23 Feb 2026 Direct
transaction TENB Common Stock Tax liability $32,731 -1,865 -1.5% $17.55 119,016 23 Feb 2026 Direct F1
transaction TENB Common Stock Options Exercise $0 +3,713 +3.1% $0.000000 122,729 23 Feb 2026 Direct
transaction TENB Common Stock Tax liability $19,130 -1,090 -0.89% $17.55 121,639 23 Feb 2026 Direct F1
transaction TENB Common Stock Options Exercise $0 +46,586 +38% $0.000000 168,225 23 Feb 2026 Direct
transaction TENB Common Stock Tax liability $274,394 -15,635 -9.3% $17.55 152,590 23 Feb 2026 Direct F1
transaction TENB Common Stock Options Exercise $0 +4,368 +2.9% $0.000000 156,958 23 Feb 2026 Direct
transaction TENB Common Stock Tax liability $22,517 -1,283 -0.82% $17.55 155,675 23 Feb 2026 Direct F1

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Underlying Class Amount Exercise Price Ownership Footnotes
transaction TENB Performance Restricted Stock Units Options Exercise $0 -1,365 -100% $0.000000 0 23 Feb 2026 Common Stock 1,365 Direct F2, F3
transaction TENB Performance Restricted Stock Units Options Exercise $0 -1,162 -20% $0.000000 4,654 23 Feb 2026 Common Stock 1,162 Direct F2, F4
transaction TENB Performance Restricted Stock Units Options Exercise $0 -2,267 -11% $0.000000 18,140 23 Feb 2026 Common Stock 2,267 Direct F2, F5
transaction TENB Restricted Stock Units Options Exercise $0 -3,857 -100% $0.000000 0 23 Feb 2026 Common Stock 3,857 Direct F2, F6
transaction TENB Restricted Stock Units Options Exercise $0 -3,713 -20% $0.000000 14,852 23 Feb 2026 Common Stock 3,713 Direct F2, F7
transaction TENB Restricted Stock Units Options Exercise $0 -46,586 -33% $0.000000 93,172 23 Feb 2026 Common Stock 46,586 Direct F2, F8
transaction TENB Restricted Stock Units Options Exercise $0 -4,368 -11% $0.000000 34,944 23 Feb 2026 Common Stock 4,368 Direct F2, F9
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 Represents the number of shares of Common Stock that have been withheld by the issuer to satisfy its income tax withholding and remittance obligations in connection with the net settlement of the Restricted Stock Units ("RSUs") and does not represent a sale.
F2 Each RSU represents a contingent right to receive one share of Issuer common stock.
F3 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.
F4 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.
F5 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 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.
F6 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.
F7 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.
F8 25% of the shares underlying the RSUs vested on August 22, 2025, 25% on February 22, 2026, 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.
F9 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.