FormFactor, Inc.
FormFactor, Inc. (FORM) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · FORM · as of Sep 30, 2025
Ownership Breakdown
285
Institutional Holders
▼ 23 vs Q2
$2.73B
Total Inst. Value
▲ $138.62M vs Q2
77.95M
Shares Outstanding
freeFloat 99.23%
75.01M
13F Shares Held
▼ 358,102 vs Q2
Institutional ownership = 13F shares ÷ total outstanding. Insider % = 100 − free float. Public % = free float − institution %. Data: FMP /symbol-positions-summary + /shares-float + SEC EDGAR.
Top Institutional Holders
FORM largest shareholders · institutional ownership
Q3 2025 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
BLACKROCK, INC. semiconductors & related devices | 11.24M | 14.55% | 14.55% | $409.22B | Nov 12, 2025 | ▼ 130.5K |
VANGUARD GROUP INC semiconductors & related devices | 10.30M | 13.34% | 13.34% | $375.12B | Nov 7, 2025 | ▲ 9.0K |
EARNEST PARTNERS LLC semiconductors & related devices | 5.95M | 7.70% | 7.70% | $216.59B | Nov 14, 2025 | ▼ 142.1K |
STATE STREET CORP semiconductors & related devices | 2.92M | 3.78% | 3.78% | $106.26B | Nov 14, 2025 | ▲ 4.2K |
BANK OF AMERICA CORP /DE/ semiconductors & related devices | 2.53M | 3.28% | 3.28% | $92.26B | Feb 3, 2026 | ▼ 273.6K |
REINHART PARTNERS, INC. semiconductors & related devices | 2.40M | 3.11% | 3.11% | $87.59B | Oct 28, 2025 | ▲ 500.2K |
ALLIANCEBERNSTEIN L.P. semiconductors & related devices | 2.40M | 3.10% | 3.10% | $87.30B | Nov 14, 2025 | ▲ 73.6K |
PRIMECAP MANAGEMENT CO/CA/ semiconductors & related devices | 2.32M | 3.01% | 3.01% | $84.66B | Nov 12, 2025 | ▲ 3.3K |
DIMENSIONAL FUND ADVISORS LP semiconductors & related devices | 2.17M | 2.81% | 2.81% | $79.06B | Nov 12, 2025 | ▼ 7.8K |
MASSACHUSETTS FINANCIAL SERVICES CO /MA/ semiconductors & related devices | 2.13M | 2.76% | 2.76% | $77.61B | Oct 29, 2025 | ▼ 86.2K |
Data from SEC Form 13F filings. Ownership bar normalised to largest holder. Change flags: isNew / isSoldOut / changeInSharesNumber (FMP extract-analytics/holder).
Institutional Activity
Q3 2025 vs prior quarter
Q3 2025
27
Increased
+4.33M shares1
New Positions
first time holders22
Decreased
−2.41M shares0
Sold Out
fully exitedNet shares change (top 50)
+1.91M
+4.33M / −2.41M
Net new holders
+6
1 new / 0 exited
Based on top 50 institutional holders by position size. Fields: isNew, isSoldOut, changeInSharesNumber (FMP extract-analytics/holder, limit=50).
Insider Buying vs Selling
FORM insider trading · insider activity
Source: SEC Form 4
Insiders have been primarily selling shares recently. Selling may be driven by pre-scheduled Rule 10b5-1 plans rather than negative sentiment.
11
Buy transactions
32
Sell transactions
0.34
Buy/Sell ratio
$0M
Total disposed
Recent Insider Transactions
Showing 10 most recent · Common Stock only
| Name · Role | Date | Type | Shares | Price | Value | After Trans. | Filing |
|---|---|---|---|---|---|---|---|
McKinnis Aric Brendan CFO, SVP Global Finance | Jun 2, 2026 | Tax Withhold | 193 | $125.11 | $24.1K | 12.9K | Form 4 ↗ |
Rhodes Sheri director | Jun 2, 2026 | Sale | 6,328 | $125.40 | $793.5K | 5.4K | Form 4 ↗ |
Obregon-Jimenez Rebeca director | May 21, 2026 | Sale | 3,828 | $126.47 | $484.1K | 7.9K | Form 4 ↗ |
WHITE BRIAN C director | May 20, 2026 | Sale | 3,250 | $126.00 | $409.5K | 8.7K | Form 4 ↗ |
St Dennis Thomas director | May 19, 2026 | Sale | 1,000 | $115.84 | $115.8K | 31.9K | Form 4 ↗ |
St Dennis Thomas director | May 15, 2026 | Award | 1,347 | — | — | 32.9K | Form 4 ↗ |
Obregon-Jimenez Rebeca director | May 15, 2026 | Award | 1,347 | — | — | 11.7K | Form 4 ↗ |
Rhodes Sheri director | May 15, 2026 | Award | 1,347 | — | — | 11.7K | Form 4 ↗ |
STEVEN-WAISS KELLEY director | May 15, 2026 | Award | 1,347 | — | — | 26.5K | Form 4 ↗ |
Titinger Jorge director | May 15, 2026 | Award | 1,347 | — | — | 14.8K | Form 4 ↗ |
Source: /insider-trading/search (FMP stable). Buy/Sell direction: acquisitionOrDisposition A=Buy, D=Sell. RSU vesting (M-Exempt) excluded from sentiment bar. All data from SEC EDGAR public filings.
About institutional & insider ownership
FormFactor, Inc. (FORM) is primarily owned by institutional investors, who hold approximately 96.2% of total shares outstanding. Company insiders own approximately 0.77%, while retail and public investors account for the remaining 3.01%.
The largest institutional shareholder of FormFactor, Inc. is BLACKROCK, INC., holding approximately 11.24 million shares — equal to 14.55% of outstanding shares — as of September 30, 2025.
A total of 285 institutional investors currently hold FORM stock, with a combined institutional value of approximately $2.73 billion as of the most recent 13F filing period.
Frequently asked questions
FORM ownershipFormFactor, Inc. (FORM) is primarily owned by institutional investors, who hold approximately 96.2% of shares. The largest shareholder is BLACKROCK, INC. with a 14.55% stake. Company insiders hold 0.77%. Data sourced from SEC Form 13F as of September 30, 2025.