UCTT · Ultra Clean Holdings, Inc. · Holdings
Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.
Institutional Ownership Trend
Holder Concentration
Across 439 13F filersWho Holds UCTT
Last 8 quarters through Sep 30, 2026 (filing window open)Each kind of 13F filer's share of the common shares 13F filers report. Holder type comes from regulatory records, never the filer's name; style, turnover and horizon are measured from each filer's own 13F book. The quarter selector does not change this card.
Jun 30, 2026, the newest closed quarter: 438 filers, like-for-like change +2.6%; actively managed books +4.8%; index-like books -1.8%.
| Holder type | Share | Filers | Change |
|---|---|---|---|
| Registered adviser | 43.0% | 239 | -7.5% |
| Exempt adviser | 1.3% | 6 | -7.4% |
| Adviser | 16.2% | 11 | +119.7% |
| Bank | 9.3% | 21 | -9.0% |
| Insurer | 1.0% | 2 | -0.8% |
| Broker-dealer | 0.1% | 2 | +28.7% |
| Benefit plan | 0.2% | 6 | -7.1% |
| Non-US | 2.1% | 11 | +21.3% |
| Holding company | 17.8% | 10 | -2.4% |
| Registered fund | 0.0% | 0 | -100.0% |
| Unknown | 9.0% | 130 | -15.4% |
| Style | Share | Filers | Change |
|---|---|---|---|
| Index-like | 32.6% | 42 | -1.8% |
| Systematic-like | 5.1% | 25 | -30.8% |
| Concentrated | 3.6% | 64 | -12.3% |
| Diversified active | 58.7% | 307 | +11.0% |
| Not measured | 0.0% | 0 | — |
| Unknown | 0.0% | 0 | — |
| Turnover | Share | Filers | Change |
|---|---|---|---|
| Low turnover | 51.4% | 226 | +6.4% |
| Medium turnover | 27.2% | 105 | +8.9% |
| High turnover | 7.5% | 62 | -34.6% |
| Unknown | 13.9% | 45 | +9.2% |
| Not measured | 0.0% | 0 | — |
| Holding horizon | Share | Filers | Change |
|---|---|---|---|
| Short horizon | 15.0% | 65 | +6.0% |
| Medium horizon | 18.1% | 67 | +5.0% |
| Long horizon | 57.9% | 263 | +2.9% |
| Unknown | 9.0% | 43 | -8.9% |
| Not measured | 0.0% | 0 | — |
| 13F book size | Share | Filers | Change |
|---|---|---|---|
| Under $1B | 3.8% | 103 | -21.2% |
| $1B to $10B | 8.1% | 136 | -12.1% |
| $10B to $100B | 17.2% | 127 | -5.0% |
| $100B or more | 70.9% | 72 | +8.5% |
| Not measured | 0.0% | 0 | — |
| Client base | Share | Filers | Change |
|---|---|---|---|
| Individuals and high net worth | 1.9% | 117 | +3.4% |
| Pooled investment vehicles | 4.5% | 36 | -32.7% |
| Registered funds and BDCs | 25.0% | 32 | -2.5% |
| Pension and profit sharing plans | 0.1% | 5 | -6.2% |
| Insurance companies | 0.4% | 3 | -42.1% |
| Charitable organizations | 0.0% | 1 | new |
| Governments and sovereign funds | 0.8% | 7 | -14.2% |
| Corporations | 0.0% | 1 | -12.4% |
| Other investment advisers | 0.1% | 8 | +3.7% |
| Other | 0.2% | 5 | +234.8% |
| Diversified | 10.0% | 24 | -4.9% |
| Unknown | 57.0% | 199 | +11.7% |
| Private funds | Share | Filers | Change |
|---|---|---|---|
| Hedge funds | 14.0% | 59 | -11.4% |
| Private equity funds | 0.6% | 11 | -27.4% |
| Venture capital funds | 0.0% | 1 | +1.9% |
| Real estate funds | 0.0% | 8 | +65.8% |
| Liquidity funds | 0.0% | 1 | -1.6% |
| Securitized asset funds | 0.2% | 1 | +1.2% |
| Other private funds | 9.2% | 27 | -25.2% |
| Mixed private funds | 1.7% | 2 | +812.4% |
| Private funds, type not stated | 0.1% | 4 | +49.9% |
| No private funds | 18.4% | 131 | -0.3% |
| Unknown | 55.7% | 193 | +12.3% |
| Location | Share | Filers | Change |
|---|---|---|---|
| United States | 92.4% | 368 | +1.1% |
| Outside the US | 7.6% | 70 | +23.7% |
The Sep 30, 2026 filing window is still open, so its bar carries the Jun 30, 2026 positions of filers that have not filed yet.
How the mix is measured
Shares are 13F common shares restated to today's split basis; options and principal amounts are left out. The change compares only filers with a 13F in both quarters and keeps each filer in its bucket of the later quarter on both sides; a filer that continues under a new CIK is compared through its successor. Holder type comes from each filer's current regulatory profile; client base and private funds come from the Form ADV roster current at each quarter end (rosters from December 2019, so an earlier quarter reads Unknown). Style, turnover, horizon and book size are measured from each filer's 13F book in the newest measured quarter, and Not measured means none was. Actively managed books are those measured systematic-like, concentrated or diversified active.
Excluded 3 holders with no observed 2026-03-31 13F and 5 holders with no observed 2026-06-30 13F. Compared across CIK changes: JANUS HENDERSON GROUP PLC continues as Jupiter Topco LLC.
Conviction and Crowding
438 13F filers, quarter ended Jun 30, 2026Measured across every 13F filer's common-share book once the quarter's filing window closed. Crowding counts filers with high turnover or that advise private funds on Form ADV.
Managers in the top fifth by current three-year FundScore alpha were net buyers of $0 (0 buying, 0 selling).
Estimated Holder Cost Basis
Quarter ended Jun 30, 2026, on that quarter's share basisEstimated, never filed: each 13F buy is costed at its quarter's average traded price and each sale keeps the average cost, so this is what holders paid on average if they traded evenly through each quarter.
Estimated cost covers 36.0% of the 13F shares; positions already held when a filer's 13F history starts, or bought in a quarter without a trusted average price, have no estimate.
Shared Holders
Companies UCTT's active holders also own, quarter ended Jun 30, 2026| # | Company | Shared holders |
|---|---|---|
| 1 | ICHR Ichor Holdings, Ltd. | 12 |
| 2 | GHM Graham Corp | 10 |
| 3 | COHU Cohu Inc | 10 |
| 4 | KN Knowles Corp | 7 |
| 5 | KLIC Kulicke & Soffa Industries Inc | 12 |
| 6 | OFRM Once Upon a Farm, PBC | 4 |
| 7 | MOD Modine Manufacturing Co | 17 |
| 8 | LSCC Lattice Semiconductor Corp | 13 |
| 9 | MXL Maxlinear, Inc | 10 |
| 10 | FORM Formfactor Inc | 10 |
Shareholder Targets
13F filers that own its peers but not UCTT, quarter ended Jun 30, 2026Found through its holder-overlap peers: ICHR, GHM, COHU, KN, KLIC, OFRM, MOD, LSCC, MXL, FORM, LASR, MKSI, SITM, ONTO, LGND, DOCN, VIAV, PKE, EXTR, OPLN. 1,412 filers in all.
| # | Filer | In peers | Largest peers |
|---|---|---|---|
| 1 | NORGES BANK Non-US, Index-like | $1,565,304,966 11 held | MKSI, ONTO, LSCC |
| 2 | Artisan Partners Limited Partnership Registered adviser, Diversified active | $1,347,633,844 6 held | LSCC, SITM, MOD |
| 3 | Whale Rock Capital Management LLC Registered adviser, Diversified active | $1,311,869,177 3 held | MKSI, SITM, VIAV |
| 4 | Capital International Investors Adviser, Diversified active | $1,267,753,903 4 held | MKSI, ICHR, KLIC |
| 5 | Capital Research Global Investors Adviser, Diversified active | $1,259,526,202 3 held | LSCC, MOD, MXL |
| 6 | Hood River Capital Management LLC Registered adviser, Diversified active | $1,051,219,467 7 held | DOCN, LSCC, SITM |
| 7 | Qube Research & Technologies Ltd Exempt adviser, Systematic-like | $835,766,761 12 held | MKSI, ONTO, LSCC |
| 8 | Aspex Management (HK) Ltd Unknown, Concentrated | $809,732,156 1 held | MKSI |
| 9 | ARROWSTREET CAPITAL, LIMITED PARTNERSHIP Registered adviser, Diversified active | $697,566,797 12 held | DOCN, VIAV, EXTR |
| 10 | Polar Capital Holdings Plc Registered adviser, Diversified active | $684,417,125 6 held | FORM, ONTO, MKSI |
Fund Ownership of UCTT by Fund Type
Registered funds' Form N-PORT reports for the quarter ended Jun 30, 2026Index funds and index ETFs hold 27.12% of shares outstanding.
| Fund type | Of shares outstanding | Shares |
|---|---|---|
| Index funds | 5.00% | 2,261,584 |
| Index ETFs | 22.13% | 10,019,056 |
| Active ETFs | 0.93% | 422,179 |
| Active funds | 23.29% | 10,545,512 |
| Unclassified | 2.02% | 916,073 |
| All registered funds | 53.37% | 24,164,404 |
How fund types are measured
Each fund series counts once, with its latest Form N-PORT report dated inside the quarter; only long share positions count, restated to today's split basis. The fund type is the series' latest Form N-CEN answer on or before the quarter end (the index-fund box and the exchange-traded flag), never its name. Unclassified funds have no usable N-CEN; unit investment trusts are among them, so index ownership is a floor. Funds sit inside their advisers' 13F reports, so these shares overlap the 13F figures and are never added to them.
| Holder | Value (USD) | % of 13F | Shares | Type | Filed | Open |
|---|---|---|---|---|---|---|
| Mega BlackRock, Inc. Holding company | $986,721,653 | 13.48% | 6,919,992 | Shares | 2026-08-07 | |
| Mega Invesco Ltd. Adviser | $445,570,789 | 6.09% | 3,124,839 | Shares | 2026-08-14 | |
| Mega VANGUARD PORTFOLIO MANAGEMENT LLC Registered adviser | $393,183,084 | 5.37% | 2,757,438 | Shares | 2026-08-13 | |
| Mega Capital World Investors Adviser | $367,901,021 | 5.03% | 2,580,132 | Shares | 2026-08-12 | |
| Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP | $299,610,108 | 4.09% | 2,101,200 | Call | 2026-08-14 | |
| Mega VANGUARD CAPITAL MANAGEMENT LLC Registered adviser | $272,208,017 | 3.72% | 1,909,026 | Shares | 2026-08-13 | |
| Large TORONTO DOMINION BANK Bank | $270,921,000 | 3.70% | 1,900,000 | Call | 2026-08-14 | |
| Mega STATE STREET CORP Bank | $256,984,395 | 3.51% | 1,802,261 | Shares | 2026-09-22 | |
| Mega Boston Partners Registered adviser | $193,952,485 | 2.65% | 1,360,211 | Shares | 2026-08-04 | |
| Mega GEODE CAPITAL MANAGEMENT, LLC Registered adviser | $187,881,003 | 2.57% | 1,317,631 | Shares | 2026-08-12 | |
| Large Driehaus Capital Management LLC Registered adviser | $186,679,113 | 2.55% | 1,309,202 | Shares | 2026-08-14 | |
| Mega DIMENSIONAL FUND ADVISORS LP Registered adviser | $135,368,384 | 1.85% | 949,354 | Shares | 2026-08-11 | |
| Mega ALLIANCEBERNSTEIN L.P. Registered adviser | $113,207,334 | 1.55% | 793,936 | Shares | 2026-08-14 | |
| Mega CHARLES SCHWAB INVESTMENT MANAGEMENT INC Registered adviser | $105,511,894 | 1.44% | 739,967 | Shares | 2026-08-14 | |
| Mega UBS Group AG Bank | $100,953,720 | 1.38% | 708,000 | Call | 2026-08-13 | |
| Large FRONTIER CAPITAL MANAGEMENT CO LLC Registered adviser | $95,183,387 | 1.30% | 667,532 | Shares | 2026-08-14 | |
| Large ROYCE & ASSOCIATES LP Registered adviser | $95,035,664 | 1.30% | 666,496 | Shares | 2026-08-14 | |
| Mid OBERWEIS ASSET MANAGEMENT INC/ Registered adviser | $92,295,084 | 1.26% | 647,276 | Shares | 2026-08-14 | |
| Large NOMURA ASSET MANAGEMENT INTERNATIONAL INC. Adviser | $88,980,152 | 1.22% | 624,028 | Shares | 2026-08-14 | |
| Mega D. E. Shaw & Co., Inc. | $88,377,566 | 1.21% | 619,802 | Shares | 2026-08-14 | |
| Mega TWO SIGMA INVESTMENTS, LP Registered adviser | $86,958,654 | 1.19% | 609,851 | Shares | 2026-08-14 | |
| Mid PARADIGM CAPITAL MANAGEMENT INC/NY Registered adviser | $86,723,238 | 1.18% | 608,200 | Shares | 2026-08-13 | |
| Mega MORGAN STANLEY Holding company | $78,316,127 | 1.07% | 549,240 | Shares | 2026-08-13 | |
| Large FULLER & THALER ASSET MANAGEMENT, INC. Registered adviser | $70,240,974 | 0.96% | 492,608 | Shares | 2026-08-12 | |
| Mega NORTHERN TRUST CORP Bank | $70,083,552 | 0.96% | 491,504 | Shares | 2026-08-13 | |
| Mega BANK OF AMERICA CORP /DE/ Bank | $60,627,983 | 0.83% | 425,191 | Shares | 2026-08-14 | |
| Mid PINNACLE ASSOCIATES LTD Registered adviser | $57,026,589 | 0.78% | 399,934 | Shares | 2026-08-03 | |
| Mega MILLENNIUM MANAGEMENT LLC Registered adviser | $55,354,150 | 0.76% | 388,205 | Shares | 2026-08-14 | |
| Mega BNP PARIBAS ARBITRAGE, SA Non-US | $53,256,937 | 0.73% | 373,497 | Shares | 2026-08-13 | |
| Mega FRANKLIN RESOURCES INC Adviser | $50,858,714 | 0.69% | 356,678 | Shares | 2026-08-13 | |
| Mega WELLS FARGO & COMPANY/MN Bank | $49,746,084 | 0.68% | 348,875 | Shares | 2026-08-14 | |
| Large First Eagle Investment Management, LLC Registered adviser | $49,611,337 | 0.68% | 347,930 | Shares | 2026-08-24 | |
| Mega GOLDMAN SACHS GROUP INC Holding company | $49,313,609 | 0.67% | 345,842 | Shares | 2026-08-14 | |
| Mega VANGUARD FIDUCIARY TRUST CO | $45,475,087 | 0.62% | 318,922 | Shares | 2026-08-13 | |
| Large Allspring Global Investments Holdings, LLC Holding company | $45,046,461 | 0.62% | 315,916 | Shares | 2026-08-13 | |
| Mega Russell Investments Group, Ltd. | $43,215,888 | 0.59% | 303,078 | Shares | 2026-08-06 | |
| Mid ION Fund Management Ltd Exempt adviser | $42,491,820 | 0.58% | 298,000 | Shares | 2026-08-14 | |
| Mega UBS Group AG Bank | $41,874,975 | 0.57% | 293,674 | Shares | 2026-08-13 | |
| Mega T. Rowe Price Investment Management, Inc. Adviser | $40,448,077 | 0.55% | 283,667 | Shares | 2026-08-14 | |
| Mega Bank of New York Mellon Corp Bank | $38,538,935 | 0.53% | 270,278 | Shares | 2026-08-06 | |
| Small Goodman Financial Corp Registered adviser | $31,820,812 | 0.43% | 223,163 | Shares | 2026-07-29 | |
| Mid NEXT CENTURY GROWTH INVESTORS LLC Adviser | $31,386,197 | 0.43% | 220,115 | Shares | 2026-08-14 | |
| Large PRUDENTIAL FINANCIAL INC Insurer | $31,261,573 | 0.43% | 219,241 | Shares | 2026-08-12 | |
| Mega PRINCIPAL FINANCIAL GROUP INC Insurer | $31,248,455 | 0.43% | 219,149 | Shares | 2026-08-04 | |
| Mega Nuveen, LLC | $31,063,087 | 0.42% | 217,849 | Shares | 2026-08-11 | |
| Small Wealth High Governance Asset Management Ltda. | $30,964,416 | 0.42% | 217,157 | Shares | 2026-08-12 | |
| Large Public Sector Pension Investment Board Non-US | $30,265,583 | 0.41% | 212,256 | Shares | 2026-08-13 | |
| Mega AQR CAPITAL MANAGEMENT LLC Registered adviser | $29,965,142 | 0.41% | 210,149 | Shares | 2026-08-14 | |
| Mega JPMORGAN CHASE & CO Bank | $29,723,739 | 0.41% | 208,456 | Shares | 2026-08-12 | |
| Large LOOMIS SAYLES & CO L P Registered adviser | $29,022,482 | 0.40% | 203,538 | Shares | 2026-08-14 | |
| Large HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND Non-US | $27,571,915 | 0.38% | 193,365 | Shares | 2026-08-13 | |
| Mid Munro Partners | $26,171,966 | 0.36% | 183,547 | Shares | 2026-08-10 | |
| Large FEDERATED HERMES, INC. Adviser | $23,813,384 | 0.33% | 167,006 | Shares | 2026-08-12 | |
| Small Divisar Capital Management LLC Registered adviser | $22,194,561 | 0.30% | 155,653 | Shares | 2026-08-14 | |
| Large MARSHALL WACE, LLP Exempt adviser | $20,558,055 | 0.28% | 144,176 | Shares | 2026-08-13 | |
| Mid Dana Investment Advisors, Inc. Registered adviser | $20,307,667 | 0.28% | 142,420 | Shares | 2026-08-13 | |
| Large MetLife Investment Management, LLC Registered adviser | $20,212,560 | 0.28% | 141,753 | Shares | 2026-08-14 | |
| Large Assenagon Asset Management S.A. | $19,341,726 | 0.26% | 238,610 | Shares | 2026-10-15 | |
| Large Universal- Beteiligungs- und Servicegesellschaft mbH | $18,993,700 | 0.26% | 133,205 | Shares | 2026-08-06 | |
| Small Newbrook Capital Advisors LP Registered adviser | $18,234,551 | 0.25% | 127,881 | Shares | 2026-08-14 | |
| Large BESSEMER GROUP INC | $17,474,401 | 0.24% | 122,561 | Shares | 2026-08-12 | |
| Large SILVERCREST ASSET MANAGEMENT GROUP LLC Registered adviser | $17,120,210 | 0.23% | 120,066 | Shares | 2026-08-14 | |
| Mega JANE STREET GROUP, LLC | $16,982,469 | 0.23% | 119,100 | Call | 2026-08-14 | |
| Large TORONTO DOMINION BANK Bank | $16,834,887 | 0.23% | 118,065 | Shares | 2026-08-14 | |
| Mega BARCLAYS PLC Bank | $16,640,253 | 0.23% | 116,700 | Call | 2026-08-14 | |
| Mega RHUMBLINE ADVISERS Registered adviser | $15,749,350 | 0.22% | 110,452 | Shares | 2026-08-12 | |
| Mega BARCLAYS PLC Bank | $15,745,643 | 0.22% | 110,426 | Shares | 2026-08-14 | |
| Mega UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC Registered adviser | $15,085,875 | 0.21% | 105,799 | Shares | 2026-08-13 | |
| Mega DEUTSCHE BANK AG\ Non-US | $15,016,436 | 0.21% | 105,312 | Shares | 2026-08-07 | |
| Mega Legal & General Group Plc | $14,980,789 | 0.20% | 105,062 | Shares | 2026-08-14 | |
| Small Redwood Grove Capital, LLC | $14,466,896 | 0.20% | 101,458 | Shares | 2026-08-14 | |
| Large TORONTO DOMINION BANK Bank | $14,259,000 | 0.19% | 100,000 | Put | 2026-08-14 | |
| Mid WINTON GROUP Ltd | $13,876,858 | 0.19% | 97,320 | Shares | 2026-08-07 | |
| Mid CASTLEARK MANAGEMENT LLC Registered adviser | $13,655,844 | 0.19% | 95,770 | Shares | 2026-08-14 | |
| Mid CloudAlpha Capital Management Limited/Hong Kong Exempt adviser | $13,114,144 | 0.18% | 91,971 | Shares | 2026-08-10 | |
| Large RENAISSANCE TECHNOLOGIES LLC Registered adviser | $13,104,021 | 0.18% | 91,900 | Shares | 2026-08-13 | |
| Mega Swiss National Bank | $12,690,510 | 0.17% | 89,000 | Shares | 2026-08-11 | |
| Mega CITIGROUP INC Bank | $12,525,675 | 0.17% | 87,844 | Shares | 2026-08-03 | |
| Large Walleye Capital LLC Registered adviser | $12,132,697 | 0.17% | 85,088 | Shares | 2026-08-03 | |
| Mid BW Gestao de Investimentos Ltda. | $11,812,583 | 0.16% | 82,843 | Shares | 2026-08-14 | |
| Small Wealth High Governance Capital Ltda | $11,812,583 | 0.16% | 82,843 | Shares | 2026-08-13 | |
| Mega CITADEL ADVISORS LLC Registered adviser | $11,777,934 | 0.16% | 82,600 | Call | 2026-09-02 | |
| Mega CITADEL ADVISORS LLC Registered adviser | $11,763,531 | 0.16% | 82,499 | Shares | 2026-09-02 | |
| Mega JANE STREET GROUP, LLC | $11,079,243 | 0.15% | 77,700 | Put | 2026-08-14 | |
| Mega AMERIPRISE FINANCIAL INC Adviser | $10,566,346 | 0.14% | 74,103 | Shares | 2026-08-14 | |
| Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP | $10,494,624 | 0.14% | 73,600 | Put | 2026-08-14 | |
| Mega CITADEL ADVISORS LLC Registered adviser | $10,123,890 | 0.14% | 71,000 | Put | 2026-09-02 | |
| Small FIRST SABREPOINT CAPITAL MANAGEMENT LP Registered adviser | $9,981,300 | 0.14% | 70,000 | Shares | 2026-08-14 | |
| Large Brevan Howard Capital Management LP Exempt adviser | $9,796,931 | 0.13% | 68,707 | Shares | 2026-08-14 | |
| Mega RAYMOND JAMES FINANCIAL INC | $9,422,488 | 0.13% | 66,081 | Shares | 2026-08-14 | |
| Mid KR Capital LP Registered adviser | $9,232,702 | 0.13% | 64,750 | Shares | 2026-08-14 | |
| Large NEW YORK STATE COMMON RETIREMENT FUND | $9,098,810 | 0.12% | 63,811 | Shares | 2026-07-29 | |
| Large Point72 Asset Management, L.P. Registered adviser | $8,903,177 | 0.12% | 62,439 | Shares | 2026-08-14 | |
| Large Calamos Advisors LLC Registered adviser | $8,716,383 | 0.12% | 61,129 | Shares | 2026-07-31 | |
| Mega PRICE T ROWE ASSOCIATES INC /MD/ Registered adviser | $8,672,323 | 0.12% | 60,820 | Shares | 2026-08-14 | |
| Mid Nicholas Investment Partners, LP Registered adviser | $8,603,595 | 0.12% | 60,338 | Shares | 2026-08-14 | |
| Mid Union Bancaire Privee, UBP SA | $7,887,508 | 0.11% | 55,316 | Shares | 2026-07-16 | |
| Mega WELLINGTON MANAGEMENT GROUP LLP Holding company | $7,670,771 | 0.10% | 53,796 | Shares | 2026-08-14 | |
| Mid SEGALL BRYANT & HAMILL, LLC Registered adviser | $7,497,097 | 0.10% | 52,578 | Shares | 2026-08-12 | |
| Mega CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM Benefit plan | $7,313,726 | 0.10% | 51,292 | Shares | 2026-08-24 |
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