Who owns Tenable Holdings, Inc. (TENB)
Which tracked institutional funds hold TENB, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See TENB company fundamentals →
Ownership as of the 2026-Q1 13F filings (latest filed 2026-05-18). 13F is disclosed up to 45 days after quarter-end, so the most recent quarter fills in over the following weeks.
How the tape is positioned
72 tracked funds added or opened TENB while 105 trimmed or exited it between 2025-Q4 and 2026-Q1 — the tape is split. When large holders disagree on a name, the funds moving first are sometimes ahead of the story.
A prompt to read the filings, not a verdict. 13F is a quarter-end snapshot disclosed up to 45 days late; a fund adds or exits for mandate, benchmark, and timing reasons that have nothing to do with a view on the stock. This is a starting question, not a signal to trade.
Conviction spread
TENB’s largest tracked holder by dollar value, VANGUARD GROUP INC, sizes it at 0.0% of its own reported 13F book, while the median holder sizes it at 0.0% of theirs — a 0.0pp gap the other way — the median holder sizes TENB more heavily than its largest holder by dollar value does.
Book-share is each fund’s reported value in TENB divided by its whole reported 13F book, so it is comparable across funds of different sizes and is unaffected by stock splits. A higher share means a fund has committed more of its book to the name — a starting question about conviction, not a verdict or a signal to trade.
Institutional & insider positioning
Between 2025-Q4 and 2026-Q1, across 308 tracked filers holding TENB, 199 increased or opened the position and 125 reduced or closed it; over the same quarter, open-market insider Form 4s were net purchases.
This fuses two public signals for the same quarter — how tracked institutions changed their positions and whether insiders bought or sold in the open market. It describes what was filed; it is a starting question, not a verdict or a signal to trade.
New buyers & exits
Funds opening or closing a position in TENB between the 2025-Q4 and 2026-Q1 13F filings, and the largest changes among funds holding it in both. New buyers and exits are counted on fund presence (split-invariant); adds and trims are measured on reported value.
New buyers 26
- VANGUARD PORTFOLIO MANAGEMENT LLC$163M
- VANGUARD CAPITAL MANAGEMENT LLC$90M
- JACOBS LEVY EQUITY MANAGEMENT, INC$31M
- SEB Asset Management AB$19M
- VANGUARD FIDUCIARY TRUST CO$14M
- Archon Capital Management LLC$9M
Full exits 19
- VANGUARD GROUP INC$339M
- RGM Capital, LLC$96M
- Skandinaviska Enskilda Banken AB (publ)$23M
- TWO SIGMA ADVISERS, LP$19M
- California Public Employees Retirement System$8M
- VOLORIDGE INVESTMENT MANAGEMENT, LLC$7M
Largest adds
- ARROWSTREET CAPITAL, LIMITED PARTNERSHIP$31M
- FMR LLC$23M
- AQR CAPITAL MANAGEMENT LLC$13M
- JANE STREET GROUP, LLC$12M
- NORGES BANK$12M
- GOLDMAN SACHS GROUP INC$10M
Largest trims
- BlackRock, Inc.$73M
- FIRST TRUST ADVISORS LP$54M
- UBS Group AG$50M
- Assenagon Asset Management S.A.$29M
- D. E. Shaw & Co., Inc.$28M
- MORGAN STANLEY$27M
Institutional holders
One row per tracked fund, largest reported value first. “% of value” is the fund’s share of this security’s tracked institutional value — not of shares outstanding. Rows marked stale are from an earlier filing than the security’s latest quarter — that fund is absent from the newest snapshot (position exited, or reported under a different name).
| Fund | Shares | Reported value | % of value | Quarter |
|---|---|---|---|---|
| BlackRock, Inc. added | 13,497,402 | $228M | 8.4% | 2026-Q1 |
| VANGUARD PORTFOLIO MANAGEMENT LLC new | 9,632,968 | $163M | 6.0% | 2026-Q1 |
| AMERIPRISE FINANCIAL INC added | 8,499,447 | $144M | 5.3% | 2026-Q1 |
| VANGUARD CAPITAL MANAGEMENT LLC new | 5,347,521 | $90M | 3.3% | 2026-Q1 |
| SHAPIRO CAPITAL MANAGEMENT LLC added | 4,150,152 | $70M | 2.6% | 2026-Q1 |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP added | 3,732,271 | $63M | 2.3% | 2026-Q1 |
| FMR LLC added | 3,440,328 | $58M | 2.1% | 2026-Q1 |
| Penserra Capital Management LLC added | 3,388,746 | $57M | 2.1% | 2026-Q1 |
| NORGES BANK trimmed | 1,608,664 | $56M | 2.1% | 2026-Q1 |
| STATE STREET CORP added | 3,085,130 | $52M | 1.9% | 2026-Q1 |
| GEODE CAPITAL MANAGEMENT, LLC trimmed | 2,924,694 | $49M | 1.8% | 2026-Q1 |
| FIRST TRUST ADVISORS LP trimmed | 2,691,055 | $46M | 1.7% | 2026-Q1 |
| MACKENZIE FINANCIAL CORP trimmed | 2,477,616 | $42M | 1.5% | 2026-Q1 |
| MORGAN STANLEY trimmed | 2,207,280 | $37M | 1.4% | 2026-Q1 |
| GOLDMAN SACHS GROUP INC added | 1,981,002 | $34M | 1.2% | 2026-Q1 |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. added | 1,945,926 | $33M | 1.2% | 2026-Q1 |
| BARCLAYS PLC trimmed | 1,907,107 | $32M | 1.2% | 2026-Q1 |
| MANUFACTURERS LIFE INSURANCE COMPANY, THE added | 1,851,229 | $31M | 1.2% | 2026-Q1 |
| JACOBS LEVY EQUITY MANAGEMENT, INC added | 1,841,995 | $31M | 1.2% | 2026-Q1 |
| Alyeska Investment Group, L.P. trimmed | 1,738,615 | $29M | 1.1% | 2026-Q1 |
| AQR CAPITAL MANAGEMENT LLC added | 1,569,695 | $27M | 1.0% | 2026-Q1 |
| UBS Group AG trimmed | 1,355,120 | $23M | 0.8% | 2026-Q1 |
| RENAISSANCE TECHNOLOGIES LLC added | 1,260,100 | $21M | 0.8% | 2026-Q1 |
| TWO SIGMA INVESTMENTS, LP added | 1,254,236 | $21M | 0.8% | 2026-Q1 |
| JANE STREET GROUP, LLC added | 1,144,552 | $19M | 0.7% | 2026-Q1 |
| SEB Asset Management AB new | 1,119,449 | $19M | 0.7% | 2026-Q1 |
| FEDERATED HERMES, INC. added | 1,100,832 | $19M | 0.7% | 2026-Q1 |
| NORTHERN TRUST CORP added | 1,080,659 | $18M | 0.7% | 2026-Q1 |
| CANADA LIFE ASSURANCE Co added | 1,018,601 | $17M | 0.6% | 2026-Q1 |
| BANK OF AMERICA CORP /DE/ added | 996,815 | $17M | 0.6% | 2026-Q1 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC trimmed | 979,744 | $17M | 0.6% | 2026-Q1 |
| HRT FINANCIAL LP added | 953,861 | $16M | 0.6% | 2026-Q1 |
| BALYASNY ASSET MANAGEMENT L.P. added | 950,710 | $16M | 0.6% | 2026-Q1 |
| Nuveen, LLC trimmed | 898,200 | $15M | 0.6% | 2026-Q1 |
| VANGUARD FIDUCIARY TRUST CO new | 823,778 | $14M | 0.5% | 2026-Q1 |
| Bank of New York Mellon Corp added | 821,163 | $14M | 0.5% | 2026-Q1 |
| DIMENSIONAL FUND ADVISORS LP added | 817,447 | $14M | 0.5% | 2026-Q1 |
| CITADEL ADVISORS LLC added | 751,919 | $13M | 0.5% | 2026-Q1 |
| Trexquant Investment LP added | 709,928 | $12M | 0.4% | 2026-Q1 |
| BNP PARIBAS FINANCIAL MARKETS trimmed | 674,205 | $11M | 0.4% | 2026-Q1 |
| VOYA INVESTMENT MANAGEMENT LLC trimmed | 648,253 | $11M | 0.4% | 2026-Q1 |
| Qube Research & Technologies Ltd trimmed | 640,453 | $11M | 0.4% | 2026-Q1 |
| Stephens Investment Management Group LLC trimmed | 633,122 | $11M | 0.4% | 2026-Q1 |
| Russell Investments Group, Ltd. added | 575,871 | $10M | 0.4% | 2026-Q1 |
| MILLENNIUM MANAGEMENT LLC trimmed | 573,256 | $10M | 0.4% | 2026-Q1 |
| Assenagon Asset Management S.A. trimmed | 520,785 | $9M | 0.3% | 2026-Q1 |
| Archon Capital Management LLC new | 519,002 | $9M | 0.3% | 2026-Q1 |
| IEQ CAPITAL, LLC added | 504,114 | $9M | 0.3% | 2026-Q1 |
| Pacer Advisors, Inc. added | 498,647 | $8M | 0.3% | 2026-Q1 |
| DEUTSCHE BANK AG\ trimmed | 490,553 | $8M | 0.3% | 2026-Q1 |
| JPMORGAN CHASE & CO added | 483,187 | $8M | 0.3% | 2026-Q1 |
| ExodusPoint Capital Management, LP added | 456,372 | $8M | 0.3% | 2026-Q1 |
| PINNACLE ASSOCIATES LTD added | 417,245 | $7M | 0.3% | 2026-Q1 |
| PANAGORA ASSET MANAGEMENT INC added | 386,234 | $7M | 0.2% | 2026-Q1 |
| J. Goldman & Co LP added | 384,796 | $7M | 0.2% | 2026-Q1 |
| SUSQUEHANNA FUNDAMENTAL INVESTMENTS, LLC added | 368,939 | $6M | 0.2% | 2026-Q1 |
| OP Asset Management Ltd new | 277,499 | $5M | 0.2% | 2026-Q1 |
| Vontobel Holding Ltd. trimmed | 307,293 | $5M | 0.2% | 2026-Q1 |
| Vident Advisory, LLC added | 302,267 | $5M | 0.2% | 2026-Q1 |
| XTX Topco Ltd added | 297,673 | $5M | 0.2% | 2026-Q1 |
| SEI INVESTMENTS CO added | 296,604 | $5M | 0.2% | 2026-Q1 |
| NORDEA INVESTMENT MANAGEMENT AB trimmed | 287,604 | $5M | 0.2% | 2026-Q1 |
| D. E. Shaw & Co., Inc. trimmed | 284,817 | $5M | 0.2% | 2026-Q1 |
| JUPITER ASSET MANAGEMENT LTD added | 275,229 | $5M | 0.2% | 2026-Q1 |
| Counterpoint Mutual Funds LLC added | 265,541 | $4M | 0.2% | 2026-Q1 |
| FARALLON CAPITAL MANAGEMENT LLC new | 265,000 | $4M | 0.2% | 2026-Q1 |
| OSSIAM trimmed | 264,020 | $4M | 0.2% | 2026-Q1 |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC trimmed | 252,572 | $4M | 0.2% | 2026-Q1 |
| HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND trimmed | 250,000 | $4M | 0.2% | 2026-Q1 |
| Swiss National Bank trimmed | 236,200 | $4M | 0.1% | 2026-Q1 |
| FIRETRAIL INVESTMENTS PTY LTD added | 234,661 | $4M | 0.1% | 2026-Q1 |
| MONIMUS CAPITAL MANAGEMENT, LP added | 234,731 | $4M | 0.1% | 2026-Q1 |
| Quantinno Capital Management LP added | 232,512 | $4M | 0.1% | 2026-Q1 |
| Squarepoint Ops LLC added | 228,893 | $4M | 0.1% | 2026-Q1 |
| ACADIAN ASSET MANAGEMENT LLC trimmed | 225,716 | $4M | 0.1% | 2026-Q1 |
| CAPITAL FUND MANAGEMENT S.A. trimmed | 215,608 | $4M | 0.1% | 2026-Q1 |
| NICHOLAS COMPANY, INC. trimmed | 191,382 | $3M | 0.1% | 2026-Q1 |
| ALLIANCEBERNSTEIN L.P. trimmed | 135,416 | $3M | 0.1% | 2026-Q1 |
| VICTORY CAPITAL MANAGEMENT INC added | 179,093 | $3M | 0.1% | 2026-Q1 |
| VANGUARD GROUP INC trimmed | 14,422,946 | $339M | 12.5% | 2025-Q4 stale |
| RGM Capital, LLC trimmed | 4,071,191 | $96M | 3.5% | 2025-Q4 stale |
| WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC trimmed | 2,434,850 | $85M | 3.1% | 2025-Q1 stale |
| ArrowMark Colorado Holdings LLC trimmed | 1,517,000 | $53M | 2.0% | 2025-Q1 stale |
| Fisher Asset Management, LLC trimmed | 1,233,591 | $43M | 1.6% | 2025-Q1 stale |
| Champlain Investment Partners, LLC trimmed | 1,110,975 | $32M | 1.2% | 2025-Q3 stale |
| Skandinaviska Enskilda Banken AB (publ) added | 986,198 | $23M | 0.9% | 2025-Q4 stale |
| TWO SIGMA ADVISERS, LP added | 827,700 | $19M | 0.7% | 2025-Q4 stale |
| LOOMIS SAYLES & CO L P trimmed | 459,812 | $16M | 0.6% | 2025-Q1 stale |
| Railway Pension Investments Ltd | 449,732 | $15M | 0.6% | 2025-Q2 stale |
| Cubist Systematic Strategies, LLC trimmed | 340,739 | $10M | 0.4% | 2025-Q3 stale |
| California Public Employees Retirement System trimmed | 330,346 | $8M | 0.3% | 2025-Q4 stale |
| VOLORIDGE INVESTMENT MANAGEMENT, LLC trimmed | 298,005 | $7M | 0.3% | 2025-Q4 stale |
| Stanley-Laman Group, Ltd. added | 179,367 | $6M | 0.2% | 2025-Q2 stale |
| Susquehanna Portfolio Strategies, LLC new | 180,848 | $5M | 0.2% | 2025-Q3 stale |
| READYSTATE ASSET MANAGEMENT LP trimmed | 157,295 | $5M | 0.2% | 2025-Q3 stale |
| NOMURA HOLDINGS INC trimmed | 182,498 | $4M | 0.2% | 2025-Q4 stale |
| Edgestream Partners, L.P. trimmed | 162,156 | $4M | 0.1% | 2025-Q4 stale |
| RENAISSANCE GROUP LLC added | 126,521 | $4M | 0.1% | 2025-Q3 stale |
| Woodline Partners LP added | 125,092 | $4M | 0.1% | 2025-Q3 stale |
| PHILADELPHIA TRUST CO trimmed | 90,000 | $3M | 0.1% | 2025-Q1 stale |
Ownership over time
Tracked institutional holder count and total shares held by filing quarter (independent scales). The curated-era tail and any mid-ingest latest quarter are handled honestly — a partial quarter is not drawn as a collapse.
Reading this table
Funds hold the same stock for different reasons — an index fund “holds” almost everything, an active manager sizes a name to a mandate and a benchmark, and each fund entered at its own price and time. Because 13F is filed up to 45 days after quarter-end, every row is a backward-looking snapshot; a manager may have traded since. Share-class siblings (a company’s A and C shares) are rolled up to one line so a dual-class name is never double-counted. Compare like-for-like. A large holder is not an endorsement, and a fund exiting is not a warning — this is a starting question, not a verdict.
About 13F filings
A Form 13F is a quarterly disclosure that institutional investment managers with over $100 million in US-listed equities must file with the SEC. In plain English: it is a snapshot of the long stock positions a fund held at the end of a quarter. It covers long US-listed equities only — not short positions, options, cash, or private holdings — and the funds shown are the large sample we track, not the complete 13F universe.