Form 4 for TENB Tenable Holdings, Inc.
Accepted 2026-08-25 16:03:13 ET · period of report 2026-08-24 · accession 0001651579-26-000008 · SEC index · Original document
Summary rows
Aggregated the way they appear in lists: one row per insider, transaction code and security table.
| X | Filed | Traded | Ticker | Insider | Title | Type | Price | Qty | Owned | ΔOwn | Value |
|---|---|---|---|---|---|---|---|---|---|---|---|
| DM | 2026-08-25 16:03 | 2026-08-24 | TENB | Thurmond Mark C. | Co-CEO, Dir | M - OptEx | $0.00 | +25.4K | 197.4K | +15% | $0 |
| DM | 2026-08-25 16:03 | 2026-08-24 | TENB | Thurmond Mark C. | Co-CEO, Dir | F - Tax | $33.94 | -12.3K | 195.3K | -6% | -$416.4K |
| DM | 2026-08-25 16:03 | 2026-08-24 | TENB | Thurmond Mark C. | Co-CEO, Dir | M - OptEx | $0.00 | -25.4K | 26.2K | -49% | $0 |
Purchase Sale Sale after option exercise All abbreviations
Every reported transaction
| # | Table | Security | Date | Code | A/D | Shares | Price | Owned after | Own | Exercise / expiry | Underlying | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Common | Common Stock | 2026-08-24 | M | A | 1,162 | $0.00 | 183,350 | D | — | — | |
| 2 | Common | Common Stock | 2026-08-24 | F | D | 562 | $33.94 | 182,788 | D | — | — | (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. |
| 3 | Common | Common Stock | 2026-08-24 | M | A | 2,267 | $0.00 | 185,055 | D | — | — | |
| 4 | Common | Common Stock | 2026-08-24 | F | D | 1,097 | $33.94 | 183,958 | D | — | — | (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. |
| 5 | Common | Common Stock | 2026-08-24 | M | A | 6,095 | $0.00 | 190,053 | D | — | — | |
| 6 | Common | Common Stock | 2026-08-24 | F | D | 2,947 | $33.94 | 187,106 | D | — | — | (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. |
| 7 | Common | Common Stock | 2026-08-24 | M | A | 3,713 | $0.00 | 190,819 | D | — | — | |
| 8 | Common | Common Stock | 2026-08-24 | F | D | 1,796 | $33.94 | 189,023 | D | — | — | (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. |
| 9 | Common | Common Stock | 2026-08-24 | M | A | 7,764 | $0.00 | 196,787 | D | — | — | |
| 10 | Common | Common Stock | 2026-08-24 | F | D | 3,754 | $33.94 | 193,033 | D | — | — | (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. |
| 11 | Common | Common Stock | 2026-08-24 | M | A | 4,368 | $0.00 | 197,401 | D | — | — | |
| 12 | Common | Common Stock | 2026-08-24 | F | D | 2,112 | $33.94 | 195,289 | D | — | — | (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. |
| 13 | Derivative | Performance Restricted Stock Units | 2026-08-24 | M | D | 1,162 | $0.00 | 2,330 | D | — · — to — | 1,162 Common Stock | (F2) Each restricted stock unit ("RSU") represents a contingent right to receive one share of Issuer common stock. (F3) 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. (F3) 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. |
| 14 | Derivative | Performance Restricted Stock Units | 2026-08-24 | M | D | 2,267 | $0.00 | 13,606 | D | — · — to — | 2,267 Common Stock | (F2) Each restricted stock unit ("RSU") represents a contingent right to receive one share of Issuer common stock. (F4) 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. (F4) 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. |
| 15 | Derivative | Performance Restricted Stock Units | 2026-08-24 | M | D | 6,095 | $0.00 | 60,957 | D | — · — to — | 6,095 Common Stock | (F2) Each restricted stock unit ("RSU") represents a contingent right to receive one share of Issuer common stock. (F5) On February 25, 2026, the Compensation Committee of the Issuer's Board of Directors certified the achievement of the Performance Restricted Stock Units (PRSUs) granted on February 21, 2025 and determined a 97.2% payout for the measurement period based on the Issuer's fiscal year 2025 criteria. 25% of the shares underlying the PRSUs vested on February 25, 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. (F5) On February 25, 2026, the Compensation Committee of the Issuer's Board of Directors certified the achievement of the Performance Restricted Stock Units (PRSUs) granted on February 21, 2025 and determined a 97.2% payout for the measurement period based on the Issuer's fiscal year 2025 criteria. 25% of the shares underlying the PRSUs vested on February 25, 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. |
| 16 | Derivative | Restricted Stock Units | 2026-08-24 | M | D | 3,713 | $0.00 | 7,426 | D | — · — to — | 3,713 Common Stock | (F2) Each restricted stock unit ("RSU") represents a contingent right to receive one share of Issuer common stock. (F6) 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. (F6) 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. |
| 17 | Derivative | Restricted Stock Units | 2026-08-24 | M | D | 7,764 | $0.00 | 77,644 | D | — · — to — | 7,764 Common Stock | (F2) Each restricted stock unit ("RSU") represents a contingent right to receive one share of Issuer common stock. (F7) 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. (F7) 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. |
| 18 | Derivative | Restricted Stock Units | 2026-08-24 | M | D | 4,368 | $0.00 | 26,208 | D | — · — to — | 4,368 Common Stock | (F2) Each restricted stock unit ("RSU") represents a contingent right to receive one share of Issuer common stock. (F8) 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. (F8) 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. |