TENB's three largest insider shareholders as of March 23, 2026 are Stephen A Vintz (Co Chief Executive Officer, 428.63K shares), Amit Yoran (President, Ceo And Chairman, 245.95K shares), Mark C. Thurmond (Co Chief Executive Officer, 168.27K shares).
| Holder | Position | Shares (Direct) | Shares (Indirect) | Report Date |
|---|---|---|---|---|
| Stephen A Vintz | Co Chief Executive Officer | 428,631 | 0 | 27 Feb, 2026 |
| Amit Yoran | President, Ceo And Chairman | 0 | 245,947 | 20 Apr, 2022 |
| Mark C. Thurmond | Co Chief Executive Officer | 168,267 | 0 | 27 Feb, 2026 |
| Richard Wells | - | 57,511 | 39,838 | 30 Jul, 2021 |
| Barron Anschutz | - | 69,794 | 0 | 25 Feb, 2026 |
| Amit Yoran | President, Ceo And Chairman | 58,633 | 0 | 26 Nov, 2024 |
| Arthur W Jr Coviello | - | 51,731 | 0 | 09 Feb, 2026 |
| Stephen A Riddick | General Counsel Secretary | 42,199 | 0 | 25 Aug, 2022 |
| George Alex Tosheff | - | 25,282 | 0 | 30 Sep, 2025 |
| Niloofar Razi Howe | - | 23,777 | 0 | 15 May, 2025 |
| John C Jr Huffard | - | 20,987 | 0 | 15 May, 2025 |
| Matthew Charles Brown | Chief Financial Officer | 18,541 | 0 | 25 Feb, 2026 |
| Raymond Jr. Vicks | - | 16,266 | 0 | 13 Feb, 2026 |
| A Brooke Seawell | - | 13,852 | 0 | 15 May, 2025 |
| Jerry M Kennelly | - | 11,639 | 0 | 17 Aug, 2022 |
| Margaret M Keane | - | 10,981 | 0 | 17 Jun, 2025 |
| Kimberly Hammonds | - | 4,962 | 0 | 26 May, 2022 |
| Linda Kay Zecher | - | 4,960 | 0 | 15 May, 2025 |
| Raymond Jr. Vicks | - | 0 | 4,500 | 09 Sep, 2025 |
* Please note that the shares above only reflect shares from the fund portfolio and the institutional portfolio. Shares from the personal portfolio are excluded from this Institutional Ownership Page. See these insiders' latest transactions here on Insider Page.
| Transaction Date | Insider Name | Security Class | Transaction Type | Shares Traded | Price | Shares Remaining | Ownership | Code |
|---|---|---|---|---|---|---|---|---|
| 25 Feb, 2026 | Stephen A Vintz | Common Stock | A | 24,381 | $0.00 | 440,298 | D | M |
| 25 Feb, 2026 | Mark C. Thurmond | Common Stock | A | 24,381 | $0.00 | 180,056 | D | M |
| 25 Feb, 2026 | Mark C. Thurmond | Common Stock | D | 11,789 | $19.00 | 168,267 | D | F |
| 26 Feb, 2026 | Matthew Charles Brown | Restricted Stock Units | A | 141,898 | $0.00 | 141,898 | D | A |
| 25 Feb, 2026 | Stephen A Vintz | Common Stock | D | 11,667 | $19.00 | 428,631 | D | F |
| 26 Feb, 2026 | Barron Anschutz | Restricted Stock Units | A | 92,879 | $0.00 | 92,879 | D | A |
| 25 Feb, 2026 | Stephen A Vintz | Performance Restricted Stock Units | D | 24,381 | $0.00 | 73,147 | D | M |
| 25 Feb, 2026 | Mark C. Thurmond | Performance Restricted Stock Units | D | 24,381 | $0.00 | 73,147 | D | M |
| 26 Feb, 2026 | Stephen A Vintz | Restricted Stock Units | A | 341,847 | $0.00 | 341,847 | D | A |
| 26 Feb, 2026 | Mark C. Thurmond | Restricted Stock Units | A | 341,847 | $0.00 | 341,847 | D | A |
| 23 Feb, 2026 | Barron Anschutz | Common Stock | A | 1,390 | $0.00 | 65,838 | D | M |
| 23 Feb, 2026 | Mark C. Thurmond | Common Stock | A | 1,365 | $0.00 | 115,004 | D | M |
| 23 Feb, 2026 | Stephen A Vintz | Common Stock | A | 1,882 | $0.00 | 375,378 | D | M |
| 23 Feb, 2026 | Matthew Charles Brown | Common Stock | A | 14,544 | $0.00 | 23,810 | D | M |
| 23 Feb, 2026 | Mark C. Thurmond | Common Stock | D | 401 | $17.55 | 114,603 | D | F |
| 23 Feb, 2026 | Stephen A Vintz | Common Stock | D | 619 | $17.55 | 374,759 | D | F |
| 23 Feb, 2026 | Matthew Charles Brown | Common Stock | D | 5,269 | $17.55 | 18,541 | D | F |
| 23 Feb, 2026 | Barron Anschutz | Common Stock | D | 666 | $17.55 | 65,172 | D | F |
| 23 Feb, 2026 | Stephen A Vintz | Common Stock | A | 1,594 | $0.00 | 376,353 | D | M |
| 23 Feb, 2026 | Matthew Charles Brown | Restricted Stock Units | D | 14,544 | $0.00 | 203,624 | D | M |