As of September 05, 2026, the three largest insider holders of TENB are Stephen A Vintz (Co Chief Executive Officer, 624.82K shares), Amit Yoran (President, Ceo And Chairman, 245.95K shares), Amit Yoran (President, Ceo And Chairman, 245.95K shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Stephen A Vintz | Co Chief Executive Officer | 624,816 | 0 | 624,816 | 46.7% | 25 Aug, 2026 |
| 2 | Mark C. Thurmond | Co Chief Executive Officer | 195,289 | 0 | 195,289 | 14.6% | 25 Aug, 2026 |
| 3 | Richard Wells | Director | 57,511 | 39,838 | 97,349 | 7.3% | 30 Jul, 2021 |
| 4 | Barron Anschutz | Other | 76,077 | 0 | 76,077 | 5.7% | 25 Aug, 2026 |
| 5 | Amit Yoran | President, Ceo And Chairman | 58,633 | 0 | 58,633 | 4.4% | 26 Nov, 2024 |
| 6 | Arthur W Jr Coviello | Director | 57,793 | 0 | 57,793 | 4.3% | 15 May, 2026 |
| 7 | Stephen A Riddick | General Counsel Secretary | 42,199 | 0 | 42,199 | 3.2% | 25 Aug, 2022 |
| 8 | Matthew Charles Brown | Chief Financial Officer | 39,866 | 0 | 39,866 | 3.0% | 26 May, 2026 |
| 9 | George Alex Tosheff | Director | 31,344 | 0 | 31,344 | 2.3% | 15 May, 2026 |
| 10 | Niloofar Razi Howe | Director | 29,839 | 0 | 29,839 | 2.2% | 15 May, 2026 |
| 11 | Raymond Jr. Vicks | Director | 20,509 | 0 | 20,509 | 1.5% | 11 Aug, 2026 |
| 12 | Margaret M Keane | Director | 20,231 | 0 | 20,231 | 1.5% | 17 Jun, 2026 |
| 13 | A Brooke Seawell | Director | 15,292 | 0 | 15,292 | 1.1% | 15 May, 2026 |
| 14 | Jerry M Kennelly | Director | 11,639 | 0 | 11,639 | 0.9% | 17 Aug, 2022 |
| 15 | Linda Kay Zecher | Director | 7,012 | 0 | 7,012 | 0.5% | 20 Aug, 2026 |
| 16 | John C Jr Huffard | Director | 6,062 | 0 | 6,062 | 0.5% | 15 May, 2026 |
| 17 | Kimberly Hammonds | Director | 4,962 | 0 | 4,962 | 0.4% | 26 May, 2022 |
Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.
| Date | Insider | Position | Transaction | Shares | Price | Value | Shares Held After | Ownership |
|---|---|---|---|---|---|---|---|---|
| 24 Aug, 2026 | Mark C. Thurmond | Co Chief Executive Officer | Acquired M | 1,162 | $0.00 | $0 | 183,350 | Direct |
| 24 Aug, 2026 | Stephen A Vintz | Co Chief Executive Officer | Acquired M | 1,595 | $0.00 | $0 | 612,119 | Direct |
| 24 Aug, 2026 | Barron Anschutz | Other | Acquired M | 1,337 | $0.00 | $0 | 75,212 | Direct |
| 24 Aug, 2026 | Mark C. Thurmond | Co Chief Executive Officer | Disposed F | 562 | $33.94 | $19.07K | 182,788 | Direct |
| 24 Aug, 2026 | Barron Anschutz | Other | Disposed F | 640 | $33.94 | $21.72K | 74,572 | Direct |
| 24 Aug, 2026 | Stephen A Vintz | Co Chief Executive Officer | Disposed F | 764 | $33.94 | $25.93K | 611,355 | Direct |
| 24 Aug, 2026 | Stephen A Vintz | Co Chief Executive Officer | Acquired M | 2,345 | $0.00 | $0 | 613,700 | Direct |
| 24 Aug, 2026 | Mark C. Thurmond | Co Chief Executive Officer | Acquired M | 2,267 | $0.00 | $0 | 185,055 | Direct |
| 24 Aug, 2026 | Barron Anschutz | Other | Acquired M | 1,258 | $0.00 | $0 | 75,830 | Direct |
| 24 Aug, 2026 | Mark C. Thurmond | Co Chief Executive Officer | Disposed F | 1,097 | $33.94 | $37.23K | 183,958 | Direct |
| 24 Aug, 2026 | Stephen A Vintz | Co Chief Executive Officer | Disposed F | 1,123 | $33.94 | $38.11K | 612,577 | Direct |
| 24 Aug, 2026 | Barron Anschutz | Other | Disposed F | 602 | $33.94 | $20.43K | 75,228 | Direct |
| 24 Aug, 2026 | Mark C. Thurmond | Co Chief Executive Officer | Acquired M | 6,095 | $0.00 | $0 | 190,053 | Direct |
| 24 Aug, 2026 | Barron Anschutz | Other | Acquired M | 1,629 | $0.00 | $0 | 76,857 | Direct |
| 24 Aug, 2026 | Stephen A Vintz | Co Chief Executive Officer | Acquired M | 6,095 | $0.00 | $0 | 618,672 | Direct |
| 24 Aug, 2026 | Barron Anschutz | Other | Disposed F | 780 | $33.94 | $26.47K | 76,077 | Direct |
| 24 Aug, 2026 | Stephen A Vintz | Co Chief Executive Officer | Disposed F | 2,917 | $33.94 | $99.00K | 615,755 | Direct |
| 24 Aug, 2026 | Mark C. Thurmond | Co Chief Executive Officer | Disposed F | 2,947 | $33.94 | $100.02K | 187,106 | Direct |
| 24 Aug, 2026 | Mark C. Thurmond | Co Chief Executive Officer | Acquired M | 3,713 | $0.00 | $0 | 190,819 | Direct |
| 24 Aug, 2026 | Stephen A Vintz | Co Chief Executive Officer | Acquired M | 5,095 | $0.00 | $0 | 620,850 | Direct |