Ultra Clean Holdings Inc
Ownership
Ownership Structure
Who owns Ultra Clean Holdings Inc (UCTT)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 97.9% of the shares are freely tradable; institutional investors hold 102.9%.
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| BlackRock Inc | 15.28 | 6,919,992 | +1.3 | 06/30/2026 |
| Amvescap Plc. | 6.90 | 3,124,839 | +88.2 | 06/30/2026 |
| Vanguard Portfolio Management, LLC | 6.09 | 2,757,438 | -1.6 | 06/30/2026 |
| Capital World Investors | 5.70 | 2,580,132 | +0.0 | 06/30/2026 |
| Vanguard Capital Management, LLC | 4.22 | 1,909,026 | -0.4 | 06/30/2026 |
| State Street Corp | 3.98 | 1,802,261 | -1.9 | 06/30/2026 |
| Boston Partners Global Investors, Inc | 3.00 | 1,360,211 | -7.4 | 06/30/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| iShares Core S&P Small-Cap ETF | 5.95 | 2,696,062 | +0.0 | 09/30/2026 |
| American Funds SMALLCAP World A | 5.26 | 2,381,374 | +0.0 | 09/30/2026 |
| Invesco Small Cap Value A | 3.01 | 1,363,498 | -25.1 | 08/31/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Insider holdings
| Person | Role | Shares | Value | As of | Type |
|---|---|---|---|---|---|
| Xiao Jinsong | Chief Executive Officer | 129,935 | 4,833,582 $ | Sep 30, 2026 | direct |
| Cook Christopher S | President, Products Division | 98,126 | 3,650,287 $ | Aug 31, 2026 | direct |
| Keogh Michael Dennis | Chief Financial Officer | 20,917 | 778,112 $ | Aug 31, 2026 | direct |
| Davern Alexander M | Director | 1,653 | 61,492 $ | Oct 30, 2026 | direct |
Holdings as of each person's most recent SEC Form 4 filing — excluding options and RSUs, which are not shares yet. Holdings may have changed between two filings.
Insiders
Insider Transactions
| Date | Person | Role | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Oct 30, 2026 | Davern Alexander M | Director | Other | 1,653 | 0.00 | – |
| Sep 30, 2026 | Xiao Jinsong | Chief Executive Officer | Other | 19,188 | 81.06 | 1,555,379 |
| Aug 31, 2026 | Keogh Michael Dennis | Chief Financial Officer | Other | 20,917 | 0.00 | – |
| Aug 31, 2026 | Cook Christopher S | President, Products Division | Other | 12,497 | 67.83 | 847,672 |
Reportable transactions by officers and major shareholders from SEC Form 4 filings. "Other" includes things like stock grants and option exercises without a buy/sell character. View all insider transactions →
Data as of: November 5, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)
Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.