Who owns FormFactor (FORM)
Which tracked institutional funds hold FORM, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See FORM 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 FORM is one-sided between 2026-Q1 and 2026-Q2: 248 added or opened and 66 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
FORM’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 FORM more heavily than its largest holder by dollar value does.
Book-share is each fund’s reported value in FORM 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 471 tracked filers holding FORM, 292 increased or opened the position and 225 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 FORM 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 73
- TREMBLANT CAPITAL GROUP$114M
- WT Asset Management Ltd$85M
- Capital World Investors$66M
- RENAISSANCE TECHNOLOGIES LLC$47M
- Panview Capital Ltd$37M
- Mawer Investment Management Ltd.$32M
Full exits 40
- T. Rowe Price Investment Management, Inc.$83M
- NATIXIS ADVISORS, LLC$44M
- BESSEMER GROUP INC$38M
- ACADIAN ASSET MANAGEMENT LLC$17M
- KADENSA CAPITAL Ltd$14M
- HRT FINANCIAL LP$10M
Largest adds
- BlackRock, Inc.$632M
- VANGUARD PORTFOLIO MANAGEMENT LLC$268M
- VANGUARD CAPITAL MANAGEMENT LLC$225M
- NORGES BANK$159M
- Invesco Ltd.$139M
- EARNEST PARTNERS LLC$129M
Largest trims
- AMERIPRISE FINANCIAL INC$66M
- VICTORY CAPITAL MANAGEMENT INC$29M
- FMR LLC$25M
- FRANKLIN RESOURCES INC$13M
- Trexquant Investment LP$13M
- AMERICAN CENTURY COMPANIES INC$11M
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. trimmed | 10,484,409 | $1.7B | 16.0% | 2026-Q2 |
| VANGUARD PORTFOLIO MANAGEMENT LLC trimmed | 5,242,203 | $838M | 8.0% | 2026-Q2 |
| EARNEST PARTNERS LLC trimmed | 3,763,214 | $602M | 5.8% | 2026-Q2 |
| VANGUARD CAPITAL MANAGEMENT LLC added | 3,515,254 | $562M | 5.4% | 2026-Q2 |
| STATE STREET CORP trimmed | 2,581,477 | $413M | 3.9% | 2026-Q2 |
| Polar Capital Holdings Plc trimmed | 2,146,098 | $343M | 3.3% | 2026-Q2 |
| GEODE CAPITAL MANAGEMENT, LLC trimmed | 1,833,001 | $295M | 2.8% | 2026-Q2 |
| BANK OF AMERICA CORP /DE/ trimmed | 1,783,638 | $285M | 2.7% | 2026-Q2 |
| PRIMECAP MANAGEMENT CO/CA/ trimmed | 1,690,114 | $270M | 2.6% | 2026-Q2 |
| Invesco Ltd. added | 1,578,533 | $252M | 2.4% | 2026-Q2 |
| ALLIANCEBERNSTEIN L.P. trimmed | 1,457,060 | $141M | 1.4% | 2026-Q2 |
| DIMENSIONAL FUND ADVISORS LP added | 1,418,910 | $227M | 2.2% | 2026-Q2 |
| SEI INVESTMENTS CO trimmed | 1,343,056 | $215M | 2.1% | 2026-Q2 |
| JANE STREET GROUP, LLC added | 1,309,873 | $209M | 2.0% | 2026-Q2 |
| FULLER & THALER ASSET MANAGEMENT, INC. added | 1,184,611 | $189M | 1.8% | 2026-Q2 |
| NORGES BANK added | 1,024,043 | $164M | 1.6% | 2026-Q2 |
| MORGAN STANLEY trimmed | 899,947 | $144M | 1.4% | 2026-Q2 |
| GF FUND MANAGEMENT CO. LTD. added | 776,000 | $124M | 1.2% | 2026-Q2 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC trimmed | 750,027 | $120M | 1.1% | 2026-Q2 |
| PRICE T ROWE ASSOCIATES INC /MD/ trimmed | 721,754 | $115M | 1.1% | 2026-Q2 |
| TREMBLANT CAPITAL GROUP new | 713,450 | $114M | 1.1% | 2026-Q2 |
| MILLENNIUM MANAGEMENT LLC added | 670,867 | $107M | 1.0% | 2026-Q2 |
| GOLDMAN SACHS GROUP INC trimmed | 661,399 | $106M | 1.0% | 2026-Q2 |
| Pictet Asset Management Holding SA added | 653,999 | $104M | 1.0% | 2026-Q2 |
| Bank of New York Mellon Corp added | 649,307 | $104M | 1.0% | 2026-Q2 |
| Nuveen, LLC trimmed | 649,293 | $104M | 1.0% | 2026-Q2 |
| REINHART PARTNERS, LLC. trimmed | 639,922 | $102M | 1.0% | 2026-Q2 |
| NORTHERN TRUST CORP trimmed | 588,018 | $94M | 0.9% | 2026-Q2 |
| NEEDHAM INVESTMENT MANAGEMENT LLC trimmed | 547,500 | $88M | 0.8% | 2026-Q2 |
| WT Asset Management Ltd new | 534,492 | $85M | 0.8% | 2026-Q2 |
| VANGUARD FIDUCIARY TRUST CO trimmed | 504,235 | $81M | 0.8% | 2026-Q2 |
| AMERIPRISE FINANCIAL INC trimmed | 435,956 | $70M | 0.7% | 2026-Q2 |
| TWO SIGMA INVESTMENTS, LP added | 425,688 | $68M | 0.7% | 2026-Q2 |
| D. E. Shaw & Co., Inc. added | 421,377 | $67M | 0.6% | 2026-Q2 |
| PRINCIPAL FINANCIAL GROUP INC added | 413,690 | $66M | 0.6% | 2026-Q2 |
| Capital World Investors new | 411,030 | $66M | 0.6% | 2026-Q2 |
| NORTHWESTERN MUTUAL WEALTH MANAGEMENT CO added | 408,428 | $65M | 0.6% | 2026-Q2 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP added | 389,826 | $62M | 0.6% | 2026-Q2 |
| MASSACHUSETTS FINANCIAL SERVICES CO /MA/ trimmed | 381,320 | $61M | 0.6% | 2026-Q2 |
| Connor, Clark & Lunn Investment Management Ltd. added | 378,075 | $60M | 0.6% | 2026-Q2 |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP trimmed | 376,376 | $60M | 0.6% | 2026-Q2 |
| JONES FINANCIAL COMPANIES LLLP trimmed | 371,323 | $49M | 0.5% | 2026-Q2 |
| ROYAL BANK OF CANADA trimmed | 334,072 | $53M | 0.5% | 2026-Q2 |
| Fisher Asset Management, LLC trimmed | 313,652 | $50M | 0.5% | 2026-Q2 |
| UBS Group AG added | 296,102 | $47M | 0.5% | 2026-Q2 |
| RENAISSANCE TECHNOLOGIES LLC added | 295,568 | $47M | 0.5% | 2026-Q2 |
| Select Equity Group, L.P. added | 285,686 | $46M | 0.4% | 2026-Q2 |
| Allspring Global Investments Holdings, LLC added | 274,250 | $40M | 0.4% | 2026-Q2 |
| Public Sector Pension Investment Board trimmed | 267,868 | $43M | 0.4% | 2026-Q2 |
| Assenagon Asset Management S.A. trimmed | 259,518 | $42M | 0.4% | 2026-Q2 |
| TUDOR INVESTMENT CORP ET AL added | 251,905 | $40M | 0.4% | 2026-Q2 |
| JPMORGAN CHASE & CO trimmed | 250,700 | $37M | 0.4% | 2026-Q2 |
| CITADEL ADVISORS LLC added | 240,276 | $38M | 0.4% | 2026-Q2 |
| NEUBERGER BERMAN GROUP LLC added | 238,532 | $38M | 0.4% | 2026-Q2 |
| ROYCE & ASSOCIATES LP trimmed | 234,556 | $38M | 0.4% | 2026-Q2 |
| Panview Capital Ltd new | 228,647 | $37M | 0.3% | 2026-Q2 |
| NOMURA ASSET MANAGEMENT CO LTD trimmed | 224,980 | $36M | 0.3% | 2026-Q2 |
| ENVESTNET ASSET MANAGEMENT INC trimmed | 220,319 | $35M | 0.3% | 2026-Q2 |
| FRANKLIN RESOURCES INC trimmed | 217,063 | $35M | 0.3% | 2026-Q2 |
| AQR CAPITAL MANAGEMENT LLC added | 214,217 | $34M | 0.3% | 2026-Q2 |
| Mawer Investment Management Ltd. new | 202,824 | $32M | 0.3% | 2026-Q2 |
| MARSHALL WACE, LLP added | 191,010 | $31M | 0.3% | 2026-Q2 |
| Legal & General Group Plc trimmed | 181,745 | $29M | 0.3% | 2026-Q2 |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC added | 180,478 | $29M | 0.3% | 2026-Q2 |
| PINNACLE ASSOCIATES LTD trimmed | 176,497 | $28M | 0.3% | 2026-Q2 |
| WELLS FARGO & COMPANY/MN trimmed | 170,844 | $27M | 0.3% | 2026-Q2 |
| FIRST TRUST ADVISORS LP added | 163,706 | $26M | 0.3% | 2026-Q2 |
| Bridgewater Associates, LP added | 162,592 | $26M | 0.2% | 2026-Q2 |
| Russell Investments Group, Ltd. added | 162,464 | $26M | 0.2% | 2026-Q2 |
| Swiss National Bank added | 156,400 | $25M | 0.2% | 2026-Q2 |
| RHUMBLINE ADVISERS trimmed | 155,993 | $25M | 0.2% | 2026-Q2 |
| ADAGE CAPITAL PARTNERS GP, L.L.C. new | 150,000 | $24M | 0.2% | 2026-Q2 |
| LOS ANGELES CAPITAL MANAGEMENT LLC added | 147,480 | $24M | 0.2% | 2026-Q2 |
| DEUTSCHE BANK AG\ trimmed | 140,509 | $22M | 0.2% | 2026-Q2 |
| PRUDENTIAL FINANCIAL INC trimmed | 138,467 | $22M | 0.2% | 2026-Q2 |
| OBERWEIS ASSET MANAGEMENT INC/ trimmed | 127,330 | $20M | 0.2% | 2026-Q2 |
| Man Group plc trimmed | 125,828 | $20M | 0.2% | 2026-Q2 |
| FEDERATED HERMES, INC. trimmed | 124,709 | $20M | 0.2% | 2026-Q2 |
| Point72 Asset Management, L.P. added | 124,472 | $20M | 0.2% | 2026-Q2 |
| Jump Financial, LLC added | 123,645 | $20M | 0.2% | 2026-Q2 |
| BNP PARIBAS FINANCIAL MARKETS trimmed | 109,114 | $17M | 0.2% | 2026-Q2 |
| First Eagle Investment Management, LLC trimmed | 106,137 | $17M | 0.2% | 2026-Q2 |
| California Public Employees Retirement System trimmed | 103,703 | $17M | 0.2% | 2026-Q2 |
| CITIGROUP INC trimmed | 96,984 | $16M | 0.1% | 2026-Q2 |
| PEREGRINE CAPITAL MANAGEMENT LLC trimmed | 94,420 | $15M | 0.1% | 2026-Q2 |
| CANADA PENSION PLAN INVESTMENT BOARD added | 92,400 | $15M | 0.1% | 2026-Q2 |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM added | 90,452 | $14M | 0.1% | 2026-Q2 |
| Temasek Holdings (Private) Ltd new | 88,197 | $14M | 0.1% | 2026-Q2 |
| Weiss Asset Management LP new | 81,760 | $13M | 0.1% | 2026-Q2 |
| BALYASNY ASSET MANAGEMENT L.P. added | 81,279 | $13M | 0.1% | 2026-Q2 |
| HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND added | 74,850 | $12M | 0.1% | 2026-Q2 |
| Grand Alliance Asset Management Ltd new | 74,650 | $12M | 0.1% | 2026-Q2 |
| VANGUARD ASSET MANAGEMENT, Ltd added | 74,362 | $12M | 0.1% | 2026-Q2 |
| Creative Planning added | 72,666 | $12M | 0.1% | 2026-Q2 |
| INTECH INVESTMENT MANAGEMENT LLC trimmed | 68,456 | $11M | 0.1% | 2026-Q2 |
| Hillsdale Investment Management Inc. added | 67,390 | $11M | 0.1% | 2026-Q2 |
| NOMURA ASSET MANAGEMENT INTERNATIONAL INC. added | 65,315 | $10M | 0.1% | 2026-Q2 |
| STATE BOARD OF ADMINISTRATION OF FLORIDA RETIREMENT SYSTEM added | 61,002 | $10M | 0.1% | 2026-Q2 |
| Catalyst Funds Management Pty Ltd added | 60,800 | $10M | 0.1% | 2026-Q2 |
| TimesSquare Capital Management, LLC trimmed | 58,321 | $9M | 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.