FormFactor, Inc. (FORM) Shareholders & Insider Trades
FormFactor shareholders at a glance
The largest holder of FormFactor stock is BlackRock Advisors LLC, with 9.9 million shares (12.72% of the company), worth about $1.00 billion as of September 25, 2026. The 10 largest holders together own 43.6%.
In Q2 2026, 532 institutional holdings reports listed shares worth $11.50 billion.
Insiders reported 92 transactions in the last two years: 44 sales worth $23.63 million and no purchases. The newest one on file is from September 16, 2026 (Slessor Michael D, Chief Executive Officer).
Major holders as of September 25, 2026; quarterly totals from institutional holdings reports (latest Q2 2026); insider transactions on file through September 16, 2026.
FormFactor, Inc.
Shareholders Summary
2026Q2
Ownership by Type
Geographic Distribution
Largest FormFactor shareholders
| Holder | Shares | % of company | Value |
|---|---|---|---|
| BlackRock Advisors LLC | 9.9 million | 12.72% | $1.0B |
| Vanguard Portfolio Management LLC | 5.2 million | 6.71% | $527.0M |
| EARNEST Partners LLC | 3.8 million | 4.82% | $379.0M |
| Vanguard Capital Management LLC | 3.5 million | 4.50% | $354.0M |
| State Street Corporation | 2.6 million | 3.30% | $260.0M |
| Polar Capital Holdings PLC | 2.1 million | 2.75% | $216.0M |
| Geode Capital Management LLC | 1.8 million | 2.35% | $184.0M |
| Merrill Lynch International | 1.8 million | 2.28% | $179.0M |
| PRIMECAP Management Co. | 1.7 million | 2.16% | $170.0M |
| Invesco Advisers, Inc. | 1.6 million | 2.02% | $159.0M |
As of September 25, 2026.
FormFactor institutional holdings by quarter
| Quarter | Reports | Shares | Value |
|---|---|---|---|
| Q2 2026 | 532 | – | $11.5B |
| Q1 2026 | 414 | 74.6 million | $7.1B |
| Q4 2025 | 350 | 77.3 million | $4.3B |
| Q3 2025 | 292 | 75.3 million | $2.7B |
| Q2 2025 | 319 | 76.8 million | $2.6B |
| Q1 2025 | 290 | 75.7 million | $2.1B |
| Q4 2024 | 314 | 76.0 million | $3.3B |
| Q3 2024 | 326 | 74.5 million | $3.4B |
Shares and value held by institutions that file quarterly holdings reports (options not included).
FormFactor insider trades
| Insider | Date | Title | Transaction | Value |
|---|---|---|---|---|
| Slessor Michael D | Sep 16, 2026 | Chief Executive Officer | Sale at price 104.26 - 105.80 per share. | $1.8M |
| Steven-Waiss Kelley | Sep 3, 2026 | Director | Sale at price 96.10 per share. | $201,810 |
| Slessor Michael D | Aug 14, 2026 | Chief Executive Officer | Sale at price 128.72 - 133.33 per share. | $2.1M |
| Slessor Michael D | Aug 7, 2026 | Chief Executive Officer | -- | – |
| Slessor Michael D | Aug 6, 2026 | Chief Executive Officer | -- | – |
| Mckinnis Aric Brendan | Aug 6, 2026 | Chief Financial Officer | -- | – |
| Slessor Michael D | Jul 15, 2026 | Chief Executive Officer | Sale at price 116.56 - 121.30 per share. | $560,195 |
| St Dennis Thomas | Jun 16, 2026 | Director | Stock Gift at price 0.00 per share. | – |
| St Dennis Thomas | Jun 15, 2026 | Director | Sale at price 151.49 per share. | $424,172 |
| Slessor Michael D | Jun 10, 2026 | Chief Executive Officer | Sale at price 117.70 - 123.37 per share. | $1.4M |
| Mckinnis Aric Brendan | Jun 2, 2026 | Officer | -- | – |
| Rhodes Sheri | Jun 2, 2026 | Director | Sale at price 125.40 per share. | $793,531 |
Newest 12 of 92 insider transactions in the last two years.
Questions and answers
Who owns the most FormFactor stock?
BlackRock Advisors LLC, with 12.72% of the company (as of September 25, 2026). Next: Vanguard Portfolio Management LLC (6.71%) and EARNEST Partners LLC (4.82%).
How many institutions own FormFactor stock?
532 institutional holdings reports listed FormFactor shares in Q2 2026 worth $11.50 billion.
Are FormFactor insiders buying or selling the stock?
In the last two years insiders reported 44 sales and no purchases (92 transactions in all); the newest on file is from September 16, 2026.
