TENB
Tenable Holdings Inc
36.10$
-0.9%
vs. previous close
Closing price · As of: Sep 17, 2026
Ownership
Ownership Structure
Who owns Tenable Holdings Inc (TENB)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 98.5% of the shares are freely tradable; institutional investors hold 113.3%.
Institutional ownership
?Share of the stock held by institutional investors (funds, banks, insurers) according to regulatory filings.
113.3%
Insiders
?Share of the stock held by the executives, founders and major shareholders of the company itself.
1.4%
Float
?Share of stock freely tradable on the market — not locked up in the hands of founders, insiders, or major shareholders.
98.5%
Short % of float
?Shares sold short as a percentage of the freely tradable float — high values signal many bets on falling prices.
16.2%
Shares Outstanding
?Total number of shares issued. Price times share count gives market cap.
110Mio.
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| BlackRock Inc | 12.25 | 13,497,402 | +5.5 | 03/31/2026 |
| Vanguard Portfolio Management, LLC | 8.75 | 9,632,968 | +0.0 | 03/31/2026 |
| Ameriprise Financial Inc | 7.72 | 8,499,447 | +29.5 | 03/31/2026 |
| Vanguard Capital Management, LLC | 4.86 | 5,347,521 | +0.0 | 03/31/2026 |
| Arrowstreet Capital Limited Partnership | 3.39 | 3,732,271 | +175.1 | 03/31/2026 |
| FMR Inc | 3.24 | 3,570,579 | +139.9 | 03/31/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| Columbia Seligman Technology Growth | 8.36 | 9,203,857 | +93.3 | 06/30/2026 |
| Columbia Seligman Tech & Info A | 6.84 | 7,534,919 | -18.1 | 07/31/2026 |
| iShares Core S&P Small-Cap ETF | 6.09 | 6,711,809 | +0.0 | 08/31/2026 |
| Vanguard MStar Total Stk Mkt Idx Invest | 3.20 | 3,519,730 | +0.3 | 07/31/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Insider holdings
| Person | Role | Shares | Value | As of | Type |
|---|---|---|---|---|---|
| Vintz Stephen A | Co-Chief Executive Officer | 624,816 | 22,555,858 $ | Aug 24, 2026 | direct |
| Thurmond Mark C. | Co-Chief Executive Officer | 195,289 | 7,049,933 $ | Aug 24, 2026 | direct |
| Anschutz Barron | Chief Accounting Officer | 76,077 | 2,746,380 $ | Aug 24, 2026 | direct |
| Brown Matthew Charles | Chief Financial Officer | 47,010 | 1,697,061 $ | Aug 21, 2026 | direct |
| Vicks Raymond Jr. | Director | 20,509 | 740,375 $ | Aug 7, 2026 | direct |
| Zecher Linda Kay | Director | 7,012 | 253,133 $ | Aug 19, 2026 | direct |
Holdings as of each person's most recent SEC Form 4 filing — excluding options and RSUs, which are not shares yet. Holdings may have changed between two filings.
Insiders
Insider Transactions
| Date | Person | Role | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Aug 24, 2026 | Thurmond Mark C. | Co-Chief Executive Officer | Other | 2,112 | 33.94 | 71,681 |
| Aug 24, 2026 | Thurmond Mark C. | Co-Chief Executive Officer | Other | 4,368 | 0.00 | – |
| Aug 24, 2026 | Thurmond Mark C. | Co-Chief Executive Officer | Other | 3,754 | 33.94 | 127,411 |
| Aug 24, 2026 | Thurmond Mark C. | Co-Chief Executive Officer | Other | 7,764 | 0.00 | – |
| Aug 24, 2026 | Thurmond Mark C. | Co-Chief Executive Officer | Other | 1,796 | 33.94 | 60,956 |
| Aug 24, 2026 | Thurmond Mark C. | Co-Chief Executive Officer | Other | 3,713 | 0.00 | – |
| Aug 24, 2026 | Thurmond Mark C. | Co-Chief Executive Officer | Other | 2,947 | 33.94 | 100,021 |
| Aug 24, 2026 | Thurmond Mark C. | Co-Chief Executive Officer | Other | 6,095 | 0.00 | – |
| Aug 24, 2026 | Thurmond Mark C. | Co-Chief Executive Officer | Other | 1,097 | 33.94 | 37,232 |
| Aug 24, 2026 | Thurmond Mark C. | Co-Chief Executive Officer | Other | 2,267 | 0.00 | – |
| Aug 24, 2026 | Thurmond Mark C. | Co-Chief Executive Officer | Other | 562 | 33.94 | 19,074 |
| Aug 24, 2026 | Thurmond Mark C. | Co-Chief Executive Officer | Other | 1,162 | 0.00 | – |
| Aug 24, 2026 | Vintz Stephen A | Co-Chief Executive Officer | Other | 2,163 | 33.94 | 73,412 |
| Aug 24, 2026 | Vintz Stephen A | Co-Chief Executive Officer | Other | 4,519 | 0.00 | – |
| Aug 24, 2026 | Vintz Stephen A | Co-Chief Executive Officer | Other | 3,716 | 33.94 | 126,121 |
| Aug 24, 2026 | Vintz Stephen A | Co-Chief Executive Officer | Other | 7,764 | 0.00 | – |
| Aug 24, 2026 | Vintz Stephen A | Co-Chief Executive Officer | Other | 2,438 | 33.94 | 82,746 |
| Aug 24, 2026 | Vintz Stephen A | Co-Chief Executive Officer | Other | 5,095 | 0.00 | – |
| Aug 24, 2026 | Vintz Stephen A | Co-Chief Executive Officer | Other | 2,917 | 33.94 | 99,003 |
| Aug 24, 2026 | Vintz Stephen A | Co-Chief Executive Officer | Other | 6,095 | 0.00 | – |
| Aug 24, 2026 | Vintz Stephen A | Co-Chief Executive Officer | Other | 1,123 | 33.94 | 38,115 |
| Aug 24, 2026 | Vintz Stephen A | Co-Chief Executive Officer | Other | 2,345 | 0.00 | – |
| Aug 24, 2026 | Vintz Stephen A | Co-Chief Executive Officer | Other | 764 | 33.94 | 25,930 |
| Aug 24, 2026 | Vintz Stephen A | Co-Chief Executive Officer | Other | 1,595 | 0.00 | – |
| Aug 24, 2026 | Anschutz Barron | Chief Accounting Officer | Other | 780 | 33.94 | 26,473 |
| Aug 24, 2026 | Anschutz Barron | Chief Accounting Officer | Other | 1,629 | 0.00 | – |
| Aug 24, 2026 | Anschutz Barron | Chief Accounting Officer | Other | 602 | 33.94 | 20,432 |
| Aug 24, 2026 | Anschutz Barron | Chief Accounting Officer | Other | 1,258 | 0.00 | – |
| Aug 24, 2026 | Anschutz Barron | Chief Accounting Officer | Other | 640 | 33.94 | 21,722 |
| Aug 24, 2026 | Anschutz Barron | Chief Accounting Officer | Other | 1,337 | 0.00 | – |
| Aug 21, 2026 | Brown Matthew Charles | Chief Financial Officer | Other | 7,400 | 34.38 | 254,412 |
| Aug 21, 2026 | Brown Matthew Charles | Chief Financial Officer | Other | 14,544 | 0.00 | – |
| Aug 19, 2026 | Zecher Linda Kay | Director | Sell | 690 | 35.76 | 24,674 |
| Aug 18, 2026 | Zecher Linda Kay | Director | Sell | 700 | 35.46 | 24,822 |
| Aug 7, 2026 | Vicks Raymond Jr. | Director | Sell | 1,819 | 35.94 | 65,375 |
| Aug 7, 2026 | Zecher Linda Kay | Director | Sell | 550 | 36.50 | 20,075 |
| Aug 5, 2026 | Vintz Stephen A | Co-Chief Executive Officer | Other | 300,736 | 36.48 | 10,970,849 |
| Aug 5, 2026 | Vintz Stephen A | Co-Chief Executive Officer | Other | 423,434 | 16.21 | 6,863,865 |
| Aug 4, 2026 | Zecher Linda Kay | Director | Sell | 600 | 36.00 | 21,600 |
| Aug 3, 2026 | Zecher Linda Kay | Director | Sell | 1,470 | 34.00 | 49,980 |
Reportable transactions by officers and major shareholders from SEC Form 4 filings. "Other" includes things like stock grants and option exercises without a buy/sell character. View all insider transactions →
Data as of: September 17, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)
Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.