Who owns Ultra Clean Holdings (UCTT)
Which tracked institutional funds hold UCTT, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See UCTT company fundamentals →
Ownership as of the 2026-Q2 13F filings (latest filed 2026-09-22). 13F is disclosed up to 45 days after quarter-end, so the most recent quarter fills in over the following weeks.
How the tape is positioned
The tracked-fund tape on UCTT is one-sided between 2026-Q1 and 2026-Q2: 221 added or opened and 46 trimmed or exited — on balance accumulating.
A prompt to read the filings, not a verdict. 13F is a quarter-end snapshot disclosed up to 45 days late; a fund adds or exits for mandate, benchmark, and timing reasons that have nothing to do with a view on the stock. This is a starting question, not a signal to trade.
Conviction spread
UCTT’s largest tracked holder by dollar value, BlackRock, Inc., sizes it at 0.0% of its own reported 13F book, while the median holder sizes it at 0.0% of theirs — a 0.0pp gap the other way — the median holder sizes UCTT more heavily than its largest holder by dollar value does.
Book-share is each fund’s reported value in UCTT divided by its whole reported 13F book, so it is comparable across funds of different sizes and is unaffected by stock splits. A higher share means a fund has committed more of its book to the name — a starting question about conviction, not a verdict or a signal to trade.
Institutional & insider positioning
Between 2026-Q1 and 2026-Q2, across 408 tracked filers holding UCTT, 227 increased or opened the position and 211 reduced or closed it; over the same quarter, open-market insider Form 4s were net sales.
This fuses two public signals for the same quarter — how tracked institutions changed their positions and whether insiders bought or sold in the open market. It describes what was filed; it is a starting question, not a verdict or a signal to trade.
New buyers & exits
Funds opening or closing a position in UCTT between the 2026-Q1 and 2026-Q2 13F filings, and the largest changes among funds holding it in both. New buyers and exits are counted on fund presence (split-invariant); adds and trims are measured on reported value.
New buyers 50
- Capital World Investors$368M
- Wealth High Governance Asset Management Ltda.$31M
- Munro Partners$26M
- Newbrook Capital Advisors LP$18M
- CloudAlpha Capital Management Limited/Hong Kong$13M
- RENAISSANCE TECHNOLOGIES LLC$13M
Full exits 33
- COOPER CREEK PARTNERS MANAGEMENT LLC$36M
- SG Americas Securities, LLC$35M
- SG Capital Management LLC$10M
- Tyro Capital Management LLC$7M
- Divisadero Street Capital Management, LP$6M
- 4D Advisors, LLC$5M
Largest adds
- BlackRock, Inc.$680M
- Invesco Ltd.$346M
- VANGUARD PORTFOLIO MANAGEMENT LLC$219M
- VANGUARD CAPITAL MANAGEMENT LLC$153M
- STATE STREET CORP$143M
- Driehaus Capital Management LLC$121M
Largest trims
- JANE STREET GROUP, LLC$19M
- FRONTIER CAPITAL MANAGEMENT CO LLC$16M
- AMERIPRISE FINANCIAL INC$5M
- G2 Investment Partners Management LLC$5M
- Divisar Capital Management LLC$4M
- AMERICAN CENTURY COMPANIES INC$4M
Institutional holders
One row per tracked fund, most shares held first (every row is from one quarter; reported value breaks ties). “% of value” is the fund’s share of this security’s tracked institutional value — not of shares outstanding.
| Fund | Shares | Reported value | % of value | Quarter |
|---|---|---|---|---|
| BlackRock, Inc. added | 6,919,992 | $987M | 16.2% | 2026-Q2 |
| Invesco Ltd. added | 3,124,839 | $446M | 7.3% | 2026-Q2 |
| VANGUARD PORTFOLIO MANAGEMENT LLC trimmed | 2,757,438 | $393M | 6.4% | 2026-Q2 |
| Capital World Investors new | 2,580,132 | $368M | 6.0% | 2026-Q2 |
| VANGUARD CAPITAL MANAGEMENT LLC trimmed | 1,909,026 | $272M | 4.5% | 2026-Q2 |
| STATE STREET CORP trimmed | 1,802,261 | $257M | 4.2% | 2026-Q2 |
| Boston Partners trimmed | 1,360,211 | $192M | 3.1% | 2026-Q2 |
| GEODE CAPITAL MANAGEMENT, LLC added | 1,317,631 | $188M | 3.1% | 2026-Q2 |
| Driehaus Capital Management LLC added | 1,309,202 | $187M | 3.1% | 2026-Q2 |
| DIMENSIONAL FUND ADVISORS LP trimmed | 949,354 | $135M | 2.2% | 2026-Q2 |
| ALLIANCEBERNSTEIN L.P. added | 793,936 | $49M | 0.8% | 2026-Q2 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC trimmed | 739,967 | $106M | 1.7% | 2026-Q2 |
| FRONTIER CAPITAL MANAGEMENT CO LLC trimmed | 667,532 | $95M | 1.6% | 2026-Q2 |
| ROYCE & ASSOCIATES LP trimmed | 666,496 | $95M | 1.6% | 2026-Q2 |
| OBERWEIS ASSET MANAGEMENT INC/ added | 647,276 | $92M | 1.5% | 2026-Q2 |
| NOMURA ASSET MANAGEMENT INTERNATIONAL INC. added | 624,028 | $89M | 1.5% | 2026-Q2 |
| D. E. Shaw & Co., Inc. trimmed | 619,802 | $88M | 1.4% | 2026-Q2 |
| TWO SIGMA INVESTMENTS, LP added | 609,851 | $87M | 1.4% | 2026-Q2 |
| PARADIGM CAPITAL MANAGEMENT INC/NY | 608,200 | $87M | 1.4% | 2026-Q2 |
| MORGAN STANLEY trimmed | 549,240 | $78M | 1.3% | 2026-Q2 |
| FULLER & THALER ASSET MANAGEMENT, INC. added | 492,608 | $70M | 1.2% | 2026-Q2 |
| NORTHERN TRUST CORP added | 491,504 | $70M | 1.1% | 2026-Q2 |
| BANK OF AMERICA CORP /DE/ trimmed | 425,191 | $61M | 1.0% | 2026-Q2 |
| PINNACLE ASSOCIATES LTD trimmed | 399,934 | $57M | 0.9% | 2026-Q2 |
| MILLENNIUM MANAGEMENT LLC trimmed | 388,205 | $55M | 0.9% | 2026-Q2 |
| BNP PARIBAS FINANCIAL MARKETS added | 373,497 | $53M | 0.9% | 2026-Q2 |
| FRANKLIN RESOURCES INC added | 356,678 | $51M | 0.8% | 2026-Q2 |
| WELLS FARGO & COMPANY/MN added | 348,875 | $50M | 0.8% | 2026-Q2 |
| First Eagle Investment Management, LLC trimmed | 347,930 | $50M | 0.8% | 2026-Q2 |
| GOLDMAN SACHS GROUP INC trimmed | 345,842 | $49M | 0.8% | 2026-Q2 |
| VANGUARD FIDUCIARY TRUST CO added | 318,922 | $45M | 0.7% | 2026-Q2 |
| Allspring Global Investments Holdings, LLC added | 315,916 | $41M | 0.7% | 2026-Q2 |
| Russell Investments Group, Ltd. trimmed | 303,078 | $43M | 0.7% | 2026-Q2 |
| ION Fund Management Ltd trimmed | 298,000 | $42M | 0.7% | 2026-Q2 |
| UBS Group AG trimmed | 293,674 | $42M | 0.7% | 2026-Q2 |
| Assenagon Asset Management S.A. added | 278,166 | $40M | 0.6% | 2026-Q2 |
| Bank of New York Mellon Corp trimmed | 270,278 | $39M | 0.6% | 2026-Q2 |
| Goodman Financial Corp trimmed | 223,163 | $32M | 0.5% | 2026-Q2 |
| NEXT CENTURY GROWTH INVESTORS LLC trimmed | 220,115 | $31M | 0.5% | 2026-Q2 |
| PRUDENTIAL FINANCIAL INC trimmed | 219,241 | $31M | 0.5% | 2026-Q2 |
| PRINCIPAL FINANCIAL GROUP INC trimmed | 219,149 | $31M | 0.5% | 2026-Q2 |
| Nuveen, LLC added | 217,849 | $31M | 0.5% | 2026-Q2 |
| Wealth High Governance Asset Management Ltda. new | 217,157 | $31M | 0.5% | 2026-Q2 |
| Public Sector Pension Investment Board trimmed | 212,256 | $30M | 0.5% | 2026-Q2 |
| AQR CAPITAL MANAGEMENT LLC added | 210,149 | $30M | 0.5% | 2026-Q2 |
| JPMORGAN CHASE & CO trimmed | 208,456 | $28M | 0.5% | 2026-Q2 |
| LOOMIS SAYLES & CO L P trimmed | 203,538 | $29M | 0.5% | 2026-Q2 |
| HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND added | 193,365 | $28M | 0.5% | 2026-Q2 |
| Munro Partners new | 183,547 | $26M | 0.4% | 2026-Q2 |
| FEDERATED HERMES, INC. trimmed | 167,006 | $24M | 0.4% | 2026-Q2 |
| Divisar Capital Management LLC trimmed | 155,653 | $22M | 0.4% | 2026-Q2 |
| MARSHALL WACE, LLP trimmed | 144,176 | $21M | 0.3% | 2026-Q2 |
| Dana Investment Advisors, Inc. trimmed | 142,420 | $20M | 0.3% | 2026-Q2 |
| MetLife Investment Management, LLC trimmed | 141,753 | $20M | 0.3% | 2026-Q2 |
| Universal- Beteiligungs- und Servicegesellschaft mbH added | 133,205 | $19M | 0.3% | 2026-Q2 |
| Newbrook Capital Advisors LP new | 127,881 | $18M | 0.3% | 2026-Q2 |
| SILVERCREST ASSET MANAGEMENT GROUP LLC trimmed | 120,066 | $17M | 0.3% | 2026-Q2 |
| TORONTO DOMINION BANK trimmed | 118,065 | $17M | 0.3% | 2026-Q2 |
| RHUMBLINE ADVISERS trimmed | 110,452 | $16M | 0.3% | 2026-Q2 |
| BARCLAYS PLC trimmed | 110,426 | $16M | 0.3% | 2026-Q2 |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC added | 105,799 | $15M | 0.2% | 2026-Q2 |
| DEUTSCHE BANK AG\ added | 105,312 | $15M | 0.2% | 2026-Q2 |
| Legal & General Group Plc added | 105,062 | $15M | 0.2% | 2026-Q2 |
| Redwood Grove Capital, LLC trimmed | 101,458 | $14M | 0.2% | 2026-Q2 |
| WINTON GROUP Ltd trimmed | 97,320 | $14M | 0.2% | 2026-Q2 |
| CASTLEARK MANAGEMENT LLC trimmed | 95,770 | $14M | 0.2% | 2026-Q2 |
| CloudAlpha Capital Management Limited/Hong Kong new | 91,971 | $13M | 0.2% | 2026-Q2 |
| RENAISSANCE TECHNOLOGIES LLC trimmed | 91,900 | $13M | 0.2% | 2026-Q2 |
| Swiss National Bank trimmed | 89,000 | $13M | 0.2% | 2026-Q2 |
| CITIGROUP INC trimmed | 87,844 | $13M | 0.2% | 2026-Q2 |
| Walleye Capital LLC trimmed | 85,088 | $12M | 0.2% | 2026-Q2 |
| BW Gestao de Investimentos Ltda. new | 82,843 | $12M | 0.2% | 2026-Q2 |
| Wealth High Governance Capital Ltda new | 82,843 | $12M | 0.2% | 2026-Q2 |
| CITADEL ADVISORS LLC added | 82,499 | $12M | 0.2% | 2026-Q2 |
| AMERIPRISE FINANCIAL INC trimmed | 74,103 | $11M | 0.2% | 2026-Q2 |
| FIRST SABREPOINT CAPITAL MANAGEMENT LP trimmed | 70,000 | $10M | 0.2% | 2026-Q2 |
| Brevan Howard Capital Management LP added | 68,707 | $10M | 0.2% | 2026-Q2 |
| RAYMOND JAMES FINANCIAL INC trimmed | 66,081 | $9M | 0.2% | 2026-Q2 |
| KR Capital LP new | 64,750 | $9M | 0.2% | 2026-Q2 |
| NEW YORK STATE COMMON RETIREMENT FUND trimmed | 63,811 | $9M | 0.1% | 2026-Q2 |
| Point72 Asset Management, L.P. added | 62,439 | $9M | 0.1% | 2026-Q2 |
| Calamos Advisors LLC trimmed | 61,129 | $9M | 0.1% | 2026-Q2 |
| PRICE T ROWE ASSOCIATES INC /MD/ added | 60,820 | $9M | 0.1% | 2026-Q2 |
| Nicholas Investment Partners, LP added | 60,338 | $9M | 0.1% | 2026-Q2 |
| WELLINGTON MANAGEMENT GROUP LLP new | 53,796 | $8M | 0.1% | 2026-Q2 |
| SEGALL BRYANT & HAMILL, LLC new | 52,578 | $7M | 0.1% | 2026-Q2 |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM trimmed | 51,292 | $7M | 0.1% | 2026-Q2 |
| Bridge City Capital, LLC trimmed | 51,065 | $7M | 0.1% | 2026-Q2 |
| FIFTH THIRD BANCORP trimmed | 50,328 | $7M | 0.1% | 2026-Q2 |
| Emerald Investment Advisers, LLC new | 49,855 | $7M | 0.1% | 2026-Q2 |
| CREDIT AGRICOLE S A added | 48,000 | $7M | 0.1% | 2026-Q2 |
| GRACE & WHITE INC /NY trimmed | 47,550 | $7M | 0.1% | 2026-Q2 |
| Insight Wealth Strategies, LLC new | 47,463 | $6M | 0.1% | 2026-Q2 |
| Lisanti Capital Growth, LLC trimmed | 46,285 | $7M | 0.1% | 2026-Q2 |
| Creative Planning added | 44,967 | $6M | 0.1% | 2026-Q2 |
| Concurrent Investment Advisors, LLC added | 44,828 | $6M | 0.1% | 2026-Q2 |
| G2 Investment Partners Management LLC trimmed | 44,700 | $6M | 0.1% | 2026-Q2 |
| TUDOR INVESTMENT CORP ET AL added | 44,249 | $6M | 0.1% | 2026-Q2 |
| CRAMER ROSENTHAL MCGLYNN LLC trimmed | 43,347 | $6M | 0.1% | 2026-Q2 |
| CI INVESTMENTS INC. new | 43,135 | $6M | 0.1% | 2026-Q2 |
Ownership over time
Tracked institutional holder count and total shares held by filing quarter (independent scales). The curated-era tail and any mid-ingest latest quarter are handled honestly — a partial quarter is not drawn as a collapse.
Reading this table
Funds hold the same stock for different reasons — an index fund “holds” almost everything, an active manager sizes a name to a mandate and a benchmark, and each fund entered at its own price and time. Because 13F is filed up to 45 days after quarter-end, every row is a backward-looking snapshot; a manager may have traded since. Share-class siblings (a company’s A and C shares) are rolled up to one line so a dual-class name is never double-counted. Compare like-for-like. A large holder is not an endorsement, and a fund exiting is not a warning — this is a starting question, not a verdict.
About 13F filings
A Form 13F is a quarterly disclosure that institutional investment managers with over $100 million in US-listed equities must file with the SEC. In plain English: it is a snapshot of the long stock positions a fund held at the end of a quarter. It covers long US-listed equities only — not short positions, options, cash, or private holdings — and the funds shown are the large sample we track, not the complete 13F universe.