FORM
FormFactor, Inc. · Technology · Semiconductors
Momentum inputs (comparable managers): holder breadth 0.0% · share flow -2.7% · net new positions 0.0% — formula
All ownership figures: tracked 13F managers only, common-stock positions, reporting period Q2 2025
| Quarter | Holders | Δ | Shares | Reported value | New | Exits |
|---|---|---|---|---|---|---|
| Q2 2026 | 129 | +7 | 49.15M | $7.75B | +15 | −8 |
| Q1 2026 | 125 | +13 | 52.00M | $4.95B | +16 | −4 |
| Q4 2025 | 112 | +3 | 57.86M | $3.23B | +4 | — |
| Q3 2025 | 17 | 0 | 33.04M | $1.20B | +1 | −2 |
| Q2 2025 | 15 | 0 | 30.26M | $1.04B | +2 | −2 |
| Q1 2025 | 12 | -2 | 9.43M | $266.77M | +1 | −3 |
| Q4 2024 | 14 | -2 | 10.58M | $465.48M | +1 | −3 |
| Q3 2024 | 15 | 0 | 7.81M | $359.35M | +1 | −1 |
| Q2 2024 | 15 | — | 8.23M | $498.09M | — | — |
| # | Manager | Shares | Δ shares | Value | Their weight | Held | ||
|---|---|---|---|---|---|---|---|---|
| 1 | BlackRock ✦ (passive) | 11.37M | — | $391.13M | 0.0% | n/c | 1 | SEC ↗ |
| 2 | BlackRock ✦ (passive) | 11.37M | — | $391.13M | 0.0% | n/c | 1 | SEC ↗ |
| 3 | BlackRock ✦ (passive) | 11.37M | — | $391.13M | 0.0% | n/c | 1 | SEC ↗ |
| 4 | BlackRock ✦ (passive) | 11.37M | — | $391.13M | 0.0% | n/c | 1 | SEC ↗ |
| 5 | BlackRock ✦ (passive) | 11.37M | — | $391.13M | 0.0% | n/c | 1 | SEC ↗ |
| 6 | BlackRock ✦ (passive) | 11.37M | — | $391.13M | 0.0% | n/c | 1 | SEC ↗ |
| 7 | BlackRock ✦ (passive) | 11.37M | — | $391.13M | 0.0% | n/c | 1 | SEC ↗ |
| 8 | BlackRock ✦ (passive) | 11.37M | — | $391.13M | 0.0% | n/c | 1 | SEC ↗ |
| 9 | BlackRock ✦ (passive) | 11.37M | — | $391.13M | 0.0% | n/c | 1 | SEC ↗ |
| 10 | BlackRock ✦ (passive) | 11.37M | — | $391.13M | 0.0% | n/c | 1 | SEC ↗ |
| 11 | BlackRock ✦ (passive) | 11.37M | — | $391.13M | 0.0% | n/c | 1 | SEC ↗ |
| 12 | BlackRock ✦ (passive) | 11.37M | — | $391.13M | 0.0% | n/c | 1 | SEC ↗ |
| 13 | BlackRock ✦ (passive) | 11.37M | — | $391.13M | 0.0% | n/c | 1 | SEC ↗ |
| 14 | BlackRock ✦ (passive) | 11.37M | — | $391.13M | 0.0% | n/c | 1 | SEC ↗ |
| 15 | BlackRock ✦ (passive) | 11.37M | — | $391.13M | 0.0% | n/c | 1 | SEC ↗ |
| 16 | The Vanguard Group ✦ (passive) | 10.29M | — | $354.11M | 0.0% | n/c | 1 | SEC ↗ |
| 17 | The Vanguard Group ✦ (passive) | 10.29M | — | $354.11M | 0.0% | n/c | 1 | SEC ↗ |
| 18 | The Vanguard Group ✦ (passive) | 10.29M | — | $354.11M | 0.0% | n/c | 1 | SEC ↗ |
| 19 | The Vanguard Group ✦ (passive) | 10.29M | — | $354.11M | 0.0% | n/c | 1 | SEC ↗ |
| 20 | The Vanguard Group ✦ (passive) | 10.29M | — | $354.11M | 0.0% | n/c | 1 | SEC ↗ |
| 21 | State Street Global Advisors ✦ (passive) | 2.91M | +0.2% | $100.25M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 22 | PRIMECAP Management ✦ | 2.32M | -16.6% | $79.88M | 0.1% | ▼ Trim | 5 | SEC ↗ |
| 23 | Geode Capital Management ✦ (passive) | 2.15M | 0.0% | $74.09M | 0.0% | ▼ Trim | 5 | SEC ↗ |
| 24 | Geode Capital Management ✦ (passive) | 2.15M | 0.0% | $74.09M | 0.0% | ▼ Trim | 5 | SEC ↗ |
| 25 | D. E. Shaw & Co. ✦ | 400.23K | -15.7% | $13.77M | 0.0% | ▼ Trim | 5 | SEC ↗ |
| 26 | AQR Capital Management ✦ | 194.50K | +395.5% | $6.69M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 27 | AQR Capital Management ✦ | 194.50K | +395.5% | $6.69M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 28 | AQR Capital Management ✦ | 194.50K | +395.5% | $6.69M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 29 | AQR Capital Management ✦ | 194.50K | +395.5% | $6.69M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 30 | Fisher Asset Management ✦ | 151.24K | -5.7% | $5.20M | 0.0% | ▼ Trim | 5 | SEC ↗ |
| 31 | Renaissance Technologies ✦ | 142.97K | New | $4.92M | 0.0% | New | 1 | SEC ↗ |
| 32 | T. Rowe Price ✦ | 90.82K | -83.4% | $3.13M | 0.0% | ▼ Trim | 5 | SEC ↗ |
| 33 | T. Rowe Price ✦ | 90.82K | -83.4% | $3.13M | 0.0% | ▼ Trim | 5 | SEC ↗ |
| 34 | Norges Bank ✦ (passive) | 83.55K | -46.9% | $2.87M | 0.0% | ▼ Trim | 5 | SEC ↗ |
| 35 | Two Sigma Investments ✦ | 55.73K | -59.5% | $1.92M | 0.0% | ▼ Trim | 5 | SEC ↗ |
| 36 | Citadel Advisors ✦ | 54.29K | New | $1.87M | 0.0% | New | 1 | SEC ↗ |
| 37 | Citadel Advisors ✦ | 54.29K | New | $1.87M | 0.0% | New | 1 | SEC ↗ |
| 38 | Millennium Management ✦ | 24.75K | +25.4% | $851,613 | 0.0% | ▲ Add | 2 | SEC ↗ |
| 39 | Fidelity (FMR) ✦ | 20.00K | — | $688,051 | 0.0% | n/c | 1 | SEC ↗ |
| 40 | Fidelity (FMR) ✦ | 20.00K | — | $688,051 | 0.0% | n/c | 1 | SEC ↗ |
“Their weight” = the position's share of that manager's reported 13F equity value — the conviction measure. ✦ = curated manager.
New buyers
| Renaissance Technologies | $4.92M | 0.0% |
| Citadel Advisors | $1.87M | 0.0% |
| Citadel Advisors | $1.87M | 0.0% |
Exited
| Marshall Wace | $879,819 | was 0.0% |
| Gotham Asset Management | $421,776 | was 0.0% |
Full-market context: across ALL 13F filers (SEC structured data, Q1 2026): 389 holders, 74.32M shares, $6.80B reported. This is a different, older period than the tracked-universe figures above and the two are never mixed.
What else this security's tracked holders most often hold — shared-ownership counts, not fundamental relationships.
Open-market purchases (P)
No open-market insider purchases in our coverage window.
Open-market sales (S)
Officer, Director · 2.48K sh · $319,483
Officer, Director · 2.89K sh · $374,659
Officer, Director · 3.28K sh · $428,432
Officer, Director · 1.12K sh · $148,106
Officer, Director · 5.54K sh · $733,388
Officer, Director · 686 sh · $91,464
Awards, exercises and tax withholding are never counted as buys or sales here. Methodology