FormFactor Inc (FORM)
Who owns FormFactor Inc (FORM)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 99.2% of the shares are freely tradable; institutional investors hold 98.8%.
Ownership Structure
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| BlackRock Inc | 15.71 | 12,247,574 | +5.9 | 03/31/2026 |
| Vanguard Group Inc | 13.11 | 10,221,530 | -0.8 | 12/31/2025 |
| Vanguard Portfolio Management, LLC | 7.54 | 5,880,008 | +0.0 | 03/31/2026 |
| Earnest Partners LLC | 6.25 | 4,875,165 | -15.6 | 03/31/2026 |
| Vanguard Capital Management, LLC | 4.45 | 3,472,491 | +0.0 | 03/31/2026 |
| State Street Corp | 3.76 | 2,928,139 | +2.0 | 03/31/2026 |
| Bank of America Corp | 3.18 | 2,481,059 | -1.4 | 03/31/2026 |
| Polar Capital Holdings PLC | 2.94 | 2,292,313 | +0.0 | 03/31/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| iShares Core S&P Small-Cap ETF | 6.03 | 4,703,010 | +0.0 | 05/29/2026 |
| Vanguard Total Stock Mkt Idx Inv | 3.18 | 2,479,319 | +0.6 | 04/30/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Insider Transactions
| Date | Person | Role | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| 15. Jul 2026 | Slessor Mike | CEO | Sell | 868 | 121.30 | 105,288 |
| 15. Jul 2026 | Slessor Mike | CEO | Sell | 300 | 120.58 | 36,174 |
| 15. Jul 2026 | Slessor Mike | CEO | Sell | 170 | 119.08 | 20,244 |
| 15. Jul 2026 | Slessor Mike | CEO | Sell | 706 | 118.21 | 83,456 |
| 15. Jul 2026 | Slessor Mike | CEO | Sell | 1,650 | 117.39 | 193,694 |
| 15. Jul 2026 | Slessor Mike | CEO | Sell | 1,041 | 116.56 | 121,339 |
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: July 31, 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.