Who owns Extreme Networks (EXTR)
Which tracked institutional funds hold EXTR, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See EXTR company fundamentals →
Ownership as of the 2026-Q2 13F filings (latest filed 2026-09-22). 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
The tracked-fund tape on EXTR is one-sided between 2026-Q1 and 2026-Q2: 176 added or opened and 40 trimmed or exited — on balance accumulating.
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
EXTR’s largest tracked holder by dollar value, BlackRock, 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 EXTR more heavily than its largest holder by dollar value does.
Book-share is each fund’s reported value in EXTR 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 2026-Q1 and 2026-Q2, across 316 tracked filers holding EXTR, 172 increased or opened the position and 170 reduced or closed it; over the same quarter, open-market insider Form 4s were net sales.
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 EXTR between the 2026-Q1 and 2026-Q2 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 35
- Boston Partners$54M
- JANE STREET GROUP, LLC$30M
- PEREGRINE CAPITAL MANAGEMENT LLC$12M
- HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND$9M
- Edgestream Partners, L.P.$7M
- Lisanti Capital Growth, LLC$6M
Full exits 26
- Alyeska Investment Group, L.P.$42M
- ACADIAN ASSET MANAGEMENT LLC$15M
- Pacer Advisors, Inc.$14M
- COOPER CREEK PARTNERS MANAGEMENT LLC$13M
- Penserra Capital Management LLC$9M
- Polar Asset Management Partners Inc.$7M
Largest adds
- BlackRock, Inc.$478M
- VANGUARD PORTFOLIO MANAGEMENT LLC$211M
- PRICE T ROWE ASSOCIATES INC /MD/$170M
- STATE STREET CORP$101M
- VANGUARD CAPITAL MANAGEMENT LLC$97M
- AMERICAN CENTURY COMPANIES INC$78M
Largest trims
- BARROW HANLEY MEWHINNEY & STRAUSS LLC$40M
- ALLIANCEBERNSTEIN L.P.$5M
- Man Group plc$4M
- Tidal Investments LLC$3M
- Engineers Gate Manager LP$2M
- Trexquant Investment LP$2M
Institutional holders
One row per tracked fund, most shares held first (every row is from one quarter; reported value breaks ties). “% of value” is the fund’s share of this security’s tracked institutional value — not of shares outstanding.
| Fund | Shares | Reported value | % of value | Quarter |
|---|---|---|---|---|
| BlackRock, Inc. added | 20,842,155 | $675M | 17.4% | 2026-Q2 |
| VANGUARD PORTFOLIO MANAGEMENT LLC trimmed | 12,841,357 | $416M | 10.7% | 2026-Q2 |
| STATE STREET CORP trimmed | 6,137,138 | $199M | 5.1% | 2026-Q2 |
| VANGUARD CAPITAL MANAGEMENT LLC trimmed | 5,680,918 | $184M | 4.7% | 2026-Q2 |
| PRICE T ROWE ASSOCIATES INC /MD/ added | 5,325,298 | $172M | 4.5% | 2026-Q2 |
| PARADIGM CAPITAL MANAGEMENT INC/NY trimmed | 4,241,300 | $137M | 3.5% | 2026-Q2 |
| FMR LLC added | 3,510,085 | $114M | 2.9% | 2026-Q2 |
| GEODE CAPITAL MANAGEMENT, LLC added | 3,405,660 | $110M | 2.8% | 2026-Q2 |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP added | 3,358,416 | $109M | 2.8% | 2026-Q2 |
| GOLDMAN SACHS GROUP INC trimmed | 3,006,288 | $97M | 2.5% | 2026-Q2 |
| LOOMIS SAYLES & CO L P trimmed | 2,536,716 | $82M | 2.1% | 2026-Q2 |
| AMERICAN CENTURY COMPANIES INC added | 2,481,691 | $80M | 2.1% | 2026-Q2 |
| RENAISSANCE TECHNOLOGIES LLC trimmed | 1,862,580 | $60M | 1.6% | 2026-Q2 |
| MORGAN STANLEY added | 1,808,176 | $59M | 1.5% | 2026-Q2 |
| AMERIPRISE FINANCIAL INC added | 1,699,543 | $55M | 1.4% | 2026-Q2 |
| SOUTHERNSUN ASSET MANAGEMENT, LLC trimmed | 1,685,450 | $55M | 1.4% | 2026-Q2 |
| Boston Partners new | 1,673,962 | $54M | 1.4% | 2026-Q2 |
| Trigran Investments, Inc. trimmed | 1,507,325 | $49M | 1.3% | 2026-Q2 |
| Nuveen, LLC trimmed | 1,483,289 | $48M | 1.2% | 2026-Q2 |
| NORTHERN TRUST CORP added | 1,461,747 | $47M | 1.2% | 2026-Q2 |
| ALLIANCEBERNSTEIN L.P. trimmed | 1,430,310 | $22M | 0.6% | 2026-Q2 |
| Shannon River Fund Management LLC added | 1,424,095 | $46M | 1.2% | 2026-Q2 |
| BANK OF AMERICA CORP /DE/ added | 1,406,591 | $46M | 1.2% | 2026-Q2 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC trimmed | 1,380,240 | $45M | 1.2% | 2026-Q2 |
| PANAGORA ASSET MANAGEMENT INC added | 1,031,475 | $33M | 0.9% | 2026-Q2 |
| MILLENNIUM MANAGEMENT LLC added | 1,028,891 | $33M | 0.9% | 2026-Q2 |
| D. E. Shaw & Co., Inc. trimmed | 938,182 | $30M | 0.8% | 2026-Q2 |
| VANGUARD FIDUCIARY TRUST CO added | 929,038 | $30M | 0.8% | 2026-Q2 |
| JANE STREET GROUP, LLC added | 923,559 | $30M | 0.8% | 2026-Q2 |
| VICTORY CAPITAL MANAGEMENT INC trimmed | 847,803 | $27M | 0.7% | 2026-Q2 |
| TWO SIGMA INVESTMENTS, LP added | 812,553 | $26M | 0.7% | 2026-Q2 |
| BNP PARIBAS FINANCIAL MARKETS added | 745,841 | $24M | 0.6% | 2026-Q2 |
| Bank of New York Mellon Corp trimmed | 738,211 | $24M | 0.6% | 2026-Q2 |
| UBS Group AG added | 708,925 | $23M | 0.6% | 2026-Q2 |
| Invesco Ltd. added | 699,203 | $23M | 0.6% | 2026-Q2 |
| Connor, Clark & Lunn Investment Management Ltd. trimmed | 673,134 | $22M | 0.6% | 2026-Q2 |
| GLENMEDE TRUST CO NA trimmed | 659,194 | $21M | 0.6% | 2026-Q2 |
| PRINCIPAL FINANCIAL GROUP INC trimmed | 655,961 | $21M | 0.5% | 2026-Q2 |
| FEDERATED HERMES, INC. trimmed | 635,142 | $21M | 0.5% | 2026-Q2 |
| Defiance ETFs, LLC trimmed | 594,878 | $19M | 0.5% | 2026-Q2 |
| Impax Asset Management Group plc trimmed | 593,678 | $19M | 0.5% | 2026-Q2 |
| First Eagle Investment Management, LLC added | 582,916 | $19M | 0.5% | 2026-Q2 |
| LYELL WEALTH MANAGEMENT, LP | 582,345 | $19M | 0.5% | 2026-Q2 |
| RAYMOND JAMES FINANCIAL INC trimmed | 537,573 | $17M | 0.4% | 2026-Q2 |
| CITADEL ADVISORS LLC added | 534,750 | $17M | 0.4% | 2026-Q2 |
| SEB Asset Management AB trimmed | 476,442 | $15M | 0.4% | 2026-Q2 |
| Public Sector Pension Investment Board trimmed | 449,257 | $15M | 0.4% | 2026-Q2 |
| AQR CAPITAL MANAGEMENT LLC added | 426,041 | $14M | 0.4% | 2026-Q2 |
| Mirador Capital Partners LP trimmed | 414,824 | $13M | 0.3% | 2026-Q2 |
| JPMORGAN CHASE & CO added | 402,715 | $13M | 0.3% | 2026-Q2 |
| PEREGRINE CAPITAL MANAGEMENT LLC new | 376,230 | $12M | 0.3% | 2026-Q2 |
| MARSHALL WACE, LLP added | 365,422 | $12M | 0.3% | 2026-Q2 |
| PRUDENTIAL FINANCIAL INC added | 364,743 | $12M | 0.3% | 2026-Q2 |
| DEUTSCHE BANK AG\ trimmed | 347,234 | $11M | 0.3% | 2026-Q2 |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC trimmed | 344,535 | $11M | 0.3% | 2026-Q2 |
| Hillsdale Investment Management Inc. added | 338,840 | $11M | 0.3% | 2026-Q2 |
| SEI INVESTMENTS CO trimmed | 330,554 | $11M | 0.3% | 2026-Q2 |
| Focus Partners Wealth trimmed | 324,620 | $11M | 0.3% | 2026-Q2 |
| RHUMBLINE ADVISERS trimmed | 312,763 | $10M | 0.3% | 2026-Q2 |
| Clearbridge Investments, LLC trimmed | 306,189 | $10M | 0.3% | 2026-Q2 |
| Legal & General Group Plc trimmed | 300,692 | $10M | 0.3% | 2026-Q2 |
| STATE OF WISCONSIN INVESTMENT BOARD trimmed | 293,113 | $9M | 0.2% | 2026-Q2 |
| HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND trimmed | 289,000 | $9M | 0.2% | 2026-Q2 |
| LAZARD ASSET MANAGEMENT LLC added | 283,976 | $9M | 0.2% | 2026-Q2 |
| VOYA INVESTMENT MANAGEMENT LLC trimmed | 268,268 | $9M | 0.2% | 2026-Q2 |
| Swiss National Bank trimmed | 262,700 | $9M | 0.2% | 2026-Q2 |
| Trexquant Investment LP trimmed | 255,114 | $8M | 0.2% | 2026-Q2 |
| MACKENZIE FINANCIAL CORP trimmed | 241,551 | $8M | 0.2% | 2026-Q2 |
| BARCLAYS PLC added | 241,153 | $8M | 0.2% | 2026-Q2 |
| TUDOR INVESTMENT CORP ET AL trimmed | 236,679 | $8M | 0.2% | 2026-Q2 |
| OP Asset Management Ltd trimmed | 227,830 | $7M | 0.2% | 2026-Q2 |
| Circumference Group LLC trimmed | 225,100 | $7M | 0.2% | 2026-Q2 |
| FRANKLIN RESOURCES INC trimmed | 224,952 | $7M | 0.2% | 2026-Q2 |
| BROOKTREE CAPITAL MANAGEMENT added | 223,636 | $7M | 0.2% | 2026-Q2 |
| Capital Advantage, Inc. trimmed | 219,308 | $7M | 0.2% | 2026-Q2 |
| ROYAL BANK OF CANADA added | 211,331 | $7M | 0.2% | 2026-Q2 |
| Edgestream Partners, L.P. added | 206,889 | $7M | 0.2% | 2026-Q2 |
| Lisanti Capital Growth, LLC trimmed | 183,095 | $6M | 0.2% | 2026-Q2 |
| INTECH INVESTMENT MANAGEMENT LLC trimmed | 179,787 | $6M | 0.2% | 2026-Q2 |
| ICON ADVISERS INC/CO added | 170,000 | $6M | 0.1% | 2026-Q2 |
| Engineers Gate Manager LP trimmed | 164,025 | $5M | 0.1% | 2026-Q2 |
| IRONWOOD INVESTMENT MANAGEMENT LLC added | 161,853 | $5M | 0.1% | 2026-Q2 |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM trimmed | 158,215 | $5M | 0.1% | 2026-Q2 |
| CAPITAL FUND MANAGEMENT S.A. added | 148,693 | $5M | 0.1% | 2026-Q2 |
| WELLS FARGO & COMPANY/MN added | 139,410 | $5M | 0.1% | 2026-Q2 |
| Ballast Asset Management, LP trimmed | 138,328 | $4M | 0.1% | 2026-Q2 |
| SUSQUEHANNA FUNDAMENTAL INVESTMENTS, LLC added | 136,131 | $4M | 0.1% | 2026-Q2 |
| VANGUARD ASSET MANAGEMENT, Ltd added | 135,914 | $4M | 0.1% | 2026-Q2 |
| D.A. DAVIDSON & CO. trimmed | 128,000 | $4M | 0.1% | 2026-Q2 |
| Numerai GP LLC new | 127,025 | $4M | 0.1% | 2026-Q2 |
| NOMURA ASSET MANAGEMENT INTERNATIONAL INC. new | 122,433 | $4M | 0.1% | 2026-Q2 |
| Torrey Growth & Income Advisors new | 116,015 | $4M | 0.1% | 2026-Q2 |
| CITIGROUP INC trimmed | 110,801 | $4M | 0.1% | 2026-Q2 |
| CenterBook Partners LP trimmed | 101,937 | $3M | 0.1% | 2026-Q2 |
| Creative Planning added | 94,653 | $3M | 0.1% | 2026-Q2 |
| Madison Asset Management, LLC new | 93,797 | $3M | 0.1% | 2026-Q2 |
| Legato Capital Management LLC added | 92,795 | $3M | 0.1% | 2026-Q2 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP added | 91,276 | $3M | 0.1% | 2026-Q2 |
| Brevan Howard Capital Management LP trimmed | 90,586 | $3M | 0.1% | 2026-Q2 |
| OPPENHEIMER ASSET MANAGEMENT INC. trimmed | 90,536 | $3M | 0.1% | 2026-Q2 |
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.