🕵️ Tenable Holdings, Inc. ($TENB)
SEC insider & ownership activity, last 12 months · CIK 1660280 · every row links its SEC filing
Over the last 12 months insiders sold $5.5M against $616K of open-market buying. Seawell A Brooke sold $3.5M in discretionary trades (Sep–Dec). No red-flag 8-Ks in the window.
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Monthly net open-market insider flow, last 12 months (up = net buying)
Insider flow
3 buyers, $616K (3 lots) · 4 sellers, $5.5M (10 lots)
| Insider | Buys | Bought | Sells | Sold | Last |
|---|---|---|---|---|---|
| Seawell A Brooke | 0 | – | 3 | $3.5M | Dec 15, 2025 |
| Stephen A. Vintz | 0 | – | 2 | $987K | Aug 26, 2025 |
| Mark C. Thurmond | 0 | – | 2 | $938K | Aug 26, 2025 |
| Brown Matthew Charles | 1 | $258K | 0 | – | May 4, 2026 |
| Arthur W. Coviello Jr. | 1 | $258K | 0 | – | Feb 9, 2026 |
| Vicks Raymond Jr. | 1 | $100K | 0 | – | Feb 12, 2026 |
| Anschutz Barron | 0 | – | 3 | $87K | Oct 17, 2025 |
5%+ holders
| Holder | Stake | Class | Schedule | Event | |
|---|---|---|---|---|---|
| Ameriprise Financial, Inc. | 13.7% | 13G | Jun 5, 2026 | filing ↗ | |
| Columbia Management Investment Advisers, LLC | 12.7% | 13G | Jun 5, 2026 | filing ↗ | |
| Blackrock, Inc. | 10.3% | 13G | Jun 4, 2026 | filing ↗ | |
| Vanguard Portfolio Management | 8.5% | 13G | Apr 29, 2026 | filing ↗ | |
| Columbia Seligman Technology and Information Fund | 8.1% | 13G | Jun 5, 2026 | filing ↗ | |
| Vanguard Capital Management | 5.4% | 13G | Apr 30, 2026 | filing ↗ |
Planned insider sales (Form 144)
| Seller | Planned | Approx. sale date | |
|---|---|---|---|
| Seawell A Brooke | $2.9M | Dec 15, 2025 | filing ↗ |
| Anschutz Barron | $28K | Oct 17, 2025 | filing ↗ |
| Seawell A Brooke | $462K | Sep 9, 2025 | filing ↗ |
| Seawell A Brooke | $139K | Sep 4, 2025 | filing ↗ |
| Stephen A. Vintz | $103K | Aug 26, 2025 | filing ↗ |
| Anschutz Barron | $20K | Aug 26, 2025 | filing ↗ |
| Mark C. Thurmond | $76K | Aug 26, 2025 | filing ↗ |
| Mark C. Thurmond | $862K | Aug 25, 2025 | filing ↗ |
| Anschutz Barron | $38K | Aug 25, 2025 | filing ↗ |
| Stephen A. Vintz | $883K | Aug 25, 2025 | filing ↗ |
Material events (8-K)
| Item | Event date | |
|---|---|---|
| Earnings (2.02) | Jul 29, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jul 29, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | May 21, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | May 21, 2026 | filing ↗ |
| Shareholder vote (5.07) | May 13, 2026 | filing ↗ |
| Earnings (2.02) | Apr 29, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Apr 29, 2026 | filing ↗ |
| Earnings (2.02) | Feb 4, 2026 | filing ↗ |
| Other events (8.01) | Feb 4, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Feb 4, 2026 | filing ↗ |
| Earnings (2.02) | Oct 29, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Oct 29, 2025 | filing ↗ |
| Officer/director changes (5.02) | Aug 19, 2025 | filing ↗ |
| Reg FD disclosure (7.01) | Aug 19, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Aug 19, 2025 | filing ↗ |
| Earnings (2.02) | Jul 30, 2025 | filing ↗ |
| Other events (8.01) | Jul 30, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jul 30, 2025 | filing ↗ |