Tenable Holdings
TENB · NASDAQ
Who owns TENB
Largest institutional holders, from their latest 13F filings
The 10 largest institutions hold 54.7% of TENB’s shares.
- Columbia Threadneedle Investments (US)12.9%
- BlackRock Institutional Trust Company, N.A.9.6%
- Vanguard Portfolio Management, LLC9.3%
- Vanguard Capital Management, LLC4.5%
- Next 6 largest institutions18.3%
- All other shareholders45.3%
| Holder | Shares | % of shares |
|---|---|---|
| Columbia Threadneedle Investments (US) | 14.30M | 12.95% |
| BlackRock Institutional Trust Company, N.A. | 10.65M | 9.65% |
| Vanguard Portfolio Management, LLC | 10.24M | 9.27% |
| Vanguard Capital Management, LLC | 5.00M | 4.52% |
| Arrowstreet Capital, Limited Partnership | 4.41M | 3.99% |
| Fidelity Management & Research Company LLC | 3.68M | 3.33% |
| State Street Investment Management (US) | 3.24M | 2.93% |
| First Trust Advisors L.P. | 2.97M | 2.69% |
| Geode Capital Management, L.L.C. | 2.96M | 2.68% |
| Penserra Capital Management LLC | 2.95M | 2.67% |
Largest mutual fund holders
| Holder | Shares | % of shares |
|---|---|---|
| Columbia Seligman Technology & Info Fd | 7.53M | 6.82% |
| iShares Core S&P Small-Cap ETF | 6.71M | 6.08% |
| Vanguard Total Stock Market Index Fund | 3.52M | 3.19% |
| Amplify Cybersecurity ETF | 3.11M | 2.81% |
| Vanguard Information Technology Index Fund | 3.00M | 2.72% |
Insider trades
Form 4 filings by officers, directors and large holders
Over the last 6 months, insiders bought $258.48K (1 trade) and sold $206.53K (6 trades) of TENB on the open market.
| Insider | Type | Shares | Value |
|---|---|---|---|
| Bell Charles H | Award | 10.39K | — |
| Thurmond Mark C. | Option exercise | 4.37K | — |
| Thurmond Mark C. | Option exercise | 7.76K | — |
| Thurmond Mark C. | Option exercise | 3.71K | — |
| Thurmond Mark C. | Option exercise | 6.09K | — |
| Thurmond Mark C. | Option exercise | 2.27K | — |
| Thurmond Mark C. | Option exercise | 1.16K | — |
| Thurmond Mark C. | Tax withholding | 2.11K | $71.68K |
| Thurmond Mark C. | Option exercise | 4.37K | — |
| Thurmond Mark C. | Tax withholding | 3.75K | $127.41K |
Congressional trades
Disclosed by members of Congress over the last 12 months
| Member | Type | Amount | Traded |
|---|---|---|---|
| Ro KhannaHouse | Purchase | $1K–$15K | Nov 21, 2025 |
| Ro KhannaHouse | Purchase | $1K–$15K | Nov 20, 2025 |
| Ro KhannaHouse | Purchase | $1K–$15K | Oct 30, 2025 |
Short interest
Settled Sep 30, 2026
- Shares short
- 15.63M
- Days to cover
- 4.47
- % of shares outstanding
- 14.16%
- Average daily volume
- 3.50M
- Change since last report
- −14.0%
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