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NasdaqGS · Technology · Holders
FormFactor Inc top institutional holders.
Top institutional shareholders of FORM ranked by position size, plus filing changes and recent insider transactions when available.
- Holder rows
- 120
- Market data feed
- Latest filing
- Mar 31, 2026
- Most recent holder report date
- Increased / initiated
- 69
- 50 decreased in loaded rows
- Insider rows
- 120
- Market data feed
Top 120 institutional holders
FormFactor Inc (FORM)
| # | Institution | % held | Shares | Change | Change % | Filing date |
|---|---|---|---|---|---|---|
| 1 | 15.8% | 12.25M | +677.93K increased | +5.86% | Mar 31, 2026 | |
| 2 | 13.2% | 10.22M | -78.33K decreased | -76.00% | Dec 31, 2025 | |
| 3 | 7.57% | 5.88M | +5.88M initiated | — | Mar 31, 2026 | |
| 4 | EARNEST PARTNERS LLC | 6.28% | 4.88M | -899.83K decreased | -15.58% | Mar 31, 2026 |
| 5 | 4.47% | 3.47M | +3.47M initiated | — | Mar 31, 2026 | |
| 6 | 3.77% | 2.93M | +58.59K increased | +2.04% | Mar 31, 2026 | |
| 7 | 3.19% | 2.48M | -35.33K decreased | -1.40% | Mar 31, 2026 | |
| 8 | POLAR CAPITAL HOLDINGS PLC | 2.95% | 2.29M | +2.29M initiated | — | Mar 31, 2026 |
| 9 | 2.87% | 2.23M | +816.85K increased | +57.74% | Mar 31, 2026 | |
| 10 | 2.82% | 2.19M | +302.02K increased | +16.02% | Mar 31, 2026 | |
| 11 | PRIMECAP MANAGEMENT CO | 2.30% | 1.79M | -292.60K decreased | -14.06% | Mar 31, 2026 |
| 12 | SEI INVESTMENTS CO | 2.17% | 1.68M | -2.75K decreased | -16.00% | Mar 31, 2026 |
| 13 | 1.82% | 1.41M | -310.14K decreased | -18.01% | Mar 31, 2026 | |
| 14 | AMERIPRISE FINANCIAL INC | 1.81% | 1.40M | +88.31K increased | +6.71% | Mar 31, 2026 |
| 15 | 1.68% | 1.31M | -962.64K decreased | -42.38% | Mar 31, 2026 | |
| 16 | 1.59% | 1.24M | +905.44K increased | +2.72% | Mar 31, 2026 | |
| 17 | REINHART PARTNERS | 1.49% | 1.16M | -992.65K decreased | -46.12% | Mar 31, 2026 |
| 18 | FULLER & THALER ASSET MANAGEMENT | 1.46% | 1.14M | +52.83K increased | +4.87% | Mar 31, 2026 |
| 19 | 1.22% | 947.54K | -4.18K decreased | -44.00% | Mar 31, 2026 | |
| 20 | JANE STREET GROUP | 1.19% | 925.62K | +807.08K increased | +6.81% | Mar 31, 2026 |
Showing 20 of 120 filing-based institutional rows.
Recent insider transactions
FormFactor Inc (FORM) Form 4 filings
| # | Insider | % company | Action | Shares | Price | Value | Filing date |
|---|---|---|---|---|---|---|---|
| 1 | OBREGON-JIMENEZ, REBECA Director | — | D | 3.83K | $126.48 | $484,146 | May 21, 2026 |
| 2 | WHITE, BRIAN C Director | — | D | 3.25K | $126.00 | $409,500 | May 20, 2026 |
| 3 | ST, DENNIS THOMAS Director | — | D | 1.00K | $115.84 | $115,840 | May 19, 2026 |
| 4 | OBREGON-JIMENEZ, REBECA Director | — | Award | 1.35K | — | — | May 15, 2026 |
| 5 | RHODES, SHERI Director | — | Award | 1.35K | — | — | May 15, 2026 |
| 6 | ST, DENNIS THOMAS Director | — | Award | 1.35K | — | — | May 15, 2026 |
| 7 | WHITE, BRIAN C Director | — | Award | 1.35K | — | — | May 15, 2026 |
| 8 | STEVEN-WAISS, KELLEY Director | — | D | 5.40K | $125.60 | $678,241 | May 15, 2026 |
| 9 | STEVEN-WAISS, KELLEY Director | — | Award | 1.35K | — | — | May 15, 2026 |
| 10 | TITINGER, JORGE Director | — | Award | 1.35K | — | — | May 15, 2026 |
| 11 | SLESSOR, MIKE Director, CEO | — | D | 398 | $126.59 | $50,383 | May 13, 2026 |
| 12 | SLESSOR, MIKE Director, CEO | — | D | 700 | $128.52 | $89,964 | May 13, 2026 |
Showing 12 of 120 filing-based insider rows. Percent of company uses current shares outstanding when available.
Frequently asked
Common questions.
Who are the largest FORM shareholders?
TECHi's FORM Holders page ranks the largest institutional shareholders of FormFactor Inc using filing-based market-data feeds.
What is institutional ownership of FORM?
The Holders page shows institutional positions by share count and, when available, the latest filing change so readers can spot accumulation, reductions, initiated positions, and unchanged holdings.
Where can I see FormFactor Inc insider transactions?
Recent insider buys, sales, awards, gifts, and option exercises appear below the institutional holders table when Form 4 rows are available.