Ultra Clean Holdings, Inc.
Ultra Clean Holdings, Inc. (UCTT) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · UCTT · as of Sep 30, 2025
Ownership Breakdown
248
Institutional Holders
▲ 12 vs Q2
$1.15B
Total Inst. Value
▲ $196.90M vs Q2
44.83M
Shares Outstanding
freeFloat 97.84%
42.11M
13F Shares Held
▼ 2,896 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
UCTT largest shareholders · institutional ownership
Q3 2025 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
BLACKROCK, INC. semiconductors & related devices | 6.71M | 14.84% | 14.84% | $182.81B | Nov 12, 2025 | ▼ 76.2K |
VANGUARD GROUP INC semiconductors & related devices | 4.70M | 10.39% | 10.39% | $128.01B | Nov 7, 2025 | ▲ 67.5K |
SHAPIRO CAPITAL MANAGEMENT LLC semiconductors & related devices | 3.69M | 8.16% | 8.16% | $100.55B | Nov 14, 2025 | ▼ 454.8K |
FRONTIER CAPITAL MANAGEMENT CO LLC semiconductors & related devices | 3.03M | 6.71% | 6.71% | $82.66B | Nov 14, 2025 | ▲ 279.1K |
INVESCO LTD. semiconductors & related devices | 2.08M | 4.61% | 4.61% | $56.80B | Nov 13, 2025 | ▲ 170.9K |
DIMENSIONAL FUND ADVISORS LP semiconductors & related devices | 1.94M | 4.30% | 4.30% | $52.93B | Nov 12, 2025 | ▼ 197.3K |
STATE STREET CORP semiconductors & related devices | 1.76M | 3.90% | 3.90% | $48.08B | Nov 14, 2025 | ▲ 27.2K |
GEODE CAPITAL MANAGEMENT, LLC semiconductors & related devices | 1.12M | 2.47% | 2.47% | $30.47B | Nov 12, 2025 | ▼ 4.8K |
ROYCE & ASSOCIATES LP semiconductors & related devices | 1.11M | 2.45% | 2.45% | $30.18B | Nov 12, 2025 | ▲ 73.9K |
DIVISAR CAPITAL MANAGEMENT LLC semiconductors & related devices | 1.05M | 2.33% | 2.33% | $28.68B | Nov 14, 2025 | ▼ 364.5K |
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
21
Increased
+2.14M shares3
New Positions
first time holders23
Decreased
−2.07M shares0
Sold Out
fully exitedNet shares change (top 50)
+71.2K
+2.14M / −2.07M
Net new holders
+1
3 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
UCTT 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.
16
Buy transactions
31
Sell transactions
0.52
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 |
|---|---|---|---|---|---|---|---|
HARDING BRIAN E Chief Accounting Officer | Jun 4, 2026 | Sale | 196 | $85.86 | $16.8K | 44.8K | Form 4 ↗ |
HARDING BRIAN E Chief Accounting Officer | Jun 4, 2026 | Sale | 1,176 | $87.72 | $103.2K | 43.7K | Form 4 ↗ |
HARDING BRIAN E Chief Accounting Officer | Jun 4, 2026 | Sale | 1,933 | $88.74 | $171.5K | 41.7K | Form 4 ↗ |
HARDING BRIAN E Chief Accounting Officer | Jun 4, 2026 | Sale | 1,407 | $89.73 | $126.3K | 40.3K | Form 4 ↗ |
HARDING BRIAN E Chief Accounting Officer | Jun 4, 2026 | Sale | 1,876 | $90.79 | $170.3K | 38.5K | Form 4 ↗ |
HARDING BRIAN E Chief Accounting Officer | Jun 4, 2026 | Sale | 636 | $91.65 | $58.3K | 37.8K | Form 4 ↗ |
HARDING BRIAN E Chief Accounting Officer | Jun 4, 2026 | Sale | 488 | $87.25 | $42.6K | 37.3K | Form 4 ↗ |
HARDING BRIAN E Chief Accounting Officer | Jun 4, 2026 | Sale | 1,199 | $88.47 | $106.1K | 36.1K | Form 4 ↗ |
HARDING BRIAN E Chief Accounting Officer | Jun 4, 2026 | Sale | 886 | $89.36 | $79.2K | 35.2K | Form 4 ↗ |
HARDING BRIAN E Chief Accounting Officer | Jun 4, 2026 | Sale | 1,277 | $90.73 | $115.9K | 34.0K | 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
Ultra Clean Holdings, Inc. (UCTT) is primarily owned by institutional investors, who hold approximately 93.9% of total shares outstanding. Company insiders own approximately 2.16%, while retail and public investors account for the remaining 3.91%.
The largest institutional shareholder of Ultra Clean Holdings, Inc. is BLACKROCK, INC., holding approximately 6.71 million shares — equal to 14.84% of outstanding shares — as of September 30, 2025.
A total of 248 institutional investors currently hold UCTT stock, with a combined institutional value of approximately $1.15 billion as of the most recent 13F filing period.
Frequently asked questions
UCTT ownershipUltra Clean Holdings, Inc. (UCTT) is primarily owned by institutional investors, who hold approximately 93.9% of shares. The largest shareholder is BLACKROCK, INC. with a 14.84% stake. Company insiders hold 2.16%. Data sourced from SEC Form 13F as of September 30, 2025.