ULTRA CLEAN HOLDINGS INC (UCTT) Institutional Shareholders
ULTRA CLEAN HOLDINGS INC (UCTT) is currently reported in institutional portfolios tracked by InsiderSet based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026. The institutional investors covered on this page collectively reported approximately $2.81B in UCTT holdings during the latest filing period.
Blackrock, Inc. is currently the largest disclosed institutional shareholder of UCTT tracked by InsiderSet, reporting ownership valued at approximately $424.85M in its March 31, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $569.23M, representing an estimated gain of +33.98% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 48% of the total disclosed UCTT value among the investors covered in this analysis. Major shareholders include Blackrock, Inc., Vanguard Portfolio Management Llc, Vanguard Capital Management Llc, and several other long-term asset managers with concentrated positions in ULTRA CLEAN HOLDINGS INC (UCTT).
This page ranks the largest institutional UCTT shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
Institutional Holders
365
Total Reported Value
$2.81B
Largest Holder
Blackrock, Inc.
Largest Position
$424.85M
Insider Transactions (90d)
50
Latest Filing Quarter
Q2 2026
New Institutional Positions
136
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Blackrock, Inc. | 0.01% | 6,832,619 | $424,852,251 | $569,225,489 | +$144,373,238 | +33.98% | |
| Vanguard Portfolio Management Llc | 0.01% | 2,802,250 | $174,243,905 | $233,455,448 | +$59,211,543 | +33.98% | |
| Vanguard Capital Management Llc | 0.00% | 1,916,501 | $119,168,032 | $159,663,698 | +$40,495,666 | +33.98% | |
| State Street Corp | 0.00% | 1,837,824 | $114,275,896 | $153,109,117 | +$38,833,221 | +33.98% | |
| Frontier Capital Management Co Llc | 1.14% | 1,787,451 | $111,143,676 | $148,912,543 | +$37,768,867 | +33.98% | |
| Invesco Ltd. | 0.02% | 1,659,949 | $103,215,629 | $138,290,351 | +$35,074,722 | +33.98% | |
| Boston Partners | 0.10% | 1,468,878 | $91,397,525 | $122,372,226 | +$30,974,701 | +33.89% | |
| D. E. Shaw & Co., Inc. | 0.06% | 1,183,257 | $73,574,920 | $98,577,141 | +$25,002,221 | +33.98% | |
| Geode Capital Management, Llc | 0.00% | 1,140,780 | $70,946,898 | $95,038,382 | +$24,091,484 | +33.96% | |
| Driehaus Capital Management Llc | 0.49% | 1,062,376 | $66,058,540 | $88,506,545 | +$22,448,005 | +33.98% | |
| Dimensional Fund Advisors Lp | 0.01% | 1,011,778 | $62,892,225 | $84,291,225 | +$21,399,000 | +34.02% | |
| Pinnacle Associates Ltd | 0.62% | 399,934 | $57,026,589 | $33,318,502 | -$23,708,087 | -41.57% | |
| Morgan Stanley | 0.00% | 911,700 | $56,689,600 | $75,953,727 | +$19,264,127 | +33.98% | |
| Charles Schwab Investment Management Inc | 0.01% | 840,456 | $52,259,554 | $70,018,389 | +$17,758,835 | +33.98% | |
| Royce & Associates Lp | 0.47% | 759,497 | $47,225,523 | $63,273,695 | +$16,048,172 | +33.98% | |
| Millennium Management Llc | 0.03% | 685,436 | $42,620,410 | $57,103,673 | +$14,483,263 | +33.98% | |
| Oberweis Asset Management Inc/ | 1.18% | 640,476 | $39,824,798 | $53,358,056 | +$13,533,258 | +33.98% | |
| Assenagon Asset Management S.A. | 0.05% | 278,166 | $39,663,690 | $23,174,009 | -$16,489,681 | -41.57% | |
| Paradigm Capital Management Inc/Ny | 1.45% | 608,200 | $37,817,876 | $50,669,142 | +$12,851,266 | +33.98% | |
| Two Sigma Investments, Lp | 0.03% | 581,131 | $36,134,726 | $48,414,024 | +$12,279,298 | +33.98% | |
| Goodman Financial Corp | 4.92% | 223,163 | $31,819,778 | $18,591,710 | -$13,228,068 | -41.57% | |
| Goldman Sachs Group Inc | 0.00% | 503,328 | $31,296,935 | $41,932,256 | +$10,635,321 | +33.98% | |
| Fuller & Thaler Asset Management, Inc. | 0.10% | 475,073 | $29,540,050 | $39,578,332 | +$10,038,282 | +33.98% | |
| Northern Trust Corp | 0.00% | 458,142 | $28,487,270 | $38,167,810 | +$9,680,540 | +33.98% | |
| Bank Of America Corp | 0.00% | 454,020 | $28,230,965 | $37,824,406 | +$9,593,441 | +33.98% | |
| Bank Of New York Mellon Corp | 0.01% | 443,653 | $27,586,318 | $36,960,731 | +$9,374,413 | +33.98% | |
| First Eagle U.S. Value | Jean-Marie Eveillard | 0.04% | 434,100 | $26,992,338 | $36,164,871 | +$9,172,533 | +33.98% |
| Divisar Capital Management Llc | 6.66% | 420,049 | $26,118,647 | $34,994,282 | +$8,875,635 | +33.98% | |
| Nomura Asset Management International Inc. | 0.04% | 412,699 | $25,662,000 | $34,381,954 | +$8,719,954 | +33.98% | |
| Russell Investments Group, Ltd. | 0.02% | 359,945 | $22,381,420 | $29,987,018 | +$7,605,598 | +33.98% | |
| Ubs Group Ag | 0.00% | 351,296 | $21,843,586 | $29,266,470 | +$7,422,884 | +33.98% | |
| Ion Fund Management Ltd | 3.32% | 349,852 | $21,753,797 | $29,146,170 | +$7,392,373 | +33.98% | |
| Bnp Paribas Financial Markets | 0.01% | 323,876 | $20,138,610 | $26,982,110 | +$6,843,500 | +33.98% | |
| Jane Street Group, Llc | 0.02% | 309,703 | $19,257,333 | $25,801,357 | +$6,544,024 | +33.98% | |
| Vanguard Fiduciary Trust Co | 0.00% | 292,790 | $18,205,682 | $24,392,335 | +$6,186,653 | +33.98% | |
| Next Century Growth Investors Llc | 1.26% | 280,543 | $17,444,163 | $23,372,037 | +$5,927,874 | +33.98% | |
| Public Sector Pension Investment Board | 0.05% | 277,351 | $17,245,685 | $23,106,112 | +$5,860,427 | +33.98% | |
| Metlife Investment Management, Llc | 0.08% | 267,871 | $16,656,219 | $22,316,333 | +$5,660,114 | +33.98% | |
| Marshall Wace, Llp | 0.02% | 259,852 | $16,157,598 | $21,648,270 | +$5,490,672 | +33.98% | |
| Ameriprise Financial Inc | 0.00% | 252,367 | $15,692,181 | $21,024,695 | +$5,332,514 | +33.98% | |
| Dana Investment Advisors, Inc. | 0.46% | 249,436 | $15,509,931 | $20,780,513 | +$5,270,582 | +33.98% | |
| Loomis Sayles & Co L P | 0.02% | 231,058 | $14,367,186 | $19,249,442 | +$4,882,256 | +33.98% | |
| Prudential Financial Inc | 0.02% | 221,486 | $13,771,999 | $18,451,999 | +$4,680,000 | +33.98% | |
| Principal Financial Group Inc | 0.01% | 220,650 | $13,720,018 | $18,382,352 | +$4,662,334 | +33.98% | |
| Citigroup Inc | 0.01% | 87,844 | $12,525,676 | $7,318,284 | -$5,207,392 | -41.57% | |
| Walleye Capital Llc | 0.06% | 85,088 | $12,132,698 | $7,088,681 | -$5,044,017 | -41.57% | |
| G2 Investment Partners Management Llc | 2.77% | 180,941 | $11,250,911 | $15,074,195 | +$3,823,284 | +33.98% | |
| Aqr Capital Management Llc | 0.01% | 178,782 | $11,116,665 | $14,894,328 | +$3,777,663 | +33.98% | |
| Federated Hermes, Inc. | 0.02% | 172,106 | $10,701,551 | $14,338,151 | +$3,636,600 | +33.98% | |
| Wells Fargo & Company/Mn | 0.00% | 171,602 | $10,670,212 | $14,296,163 | +$3,625,951 | +33.98% |
Frequently asked questions about UCTT
Who owns the most UCTT stock?
The largest holders of UCTT are typically major institutional investors such as asset managers and hedge funds reporting on Form 13F. The table above ranks tracked superinvestors by reported position size using the latest available filings for ULTRA CLEAN HOLDINGS INC (UCTT).
Is UCTT widely held by superinvestors?
Many widely followed stocks like UCTT appear across numerous superinvestor portfolios because of liquidity, index inclusion, and fundamentals. The holder count and table above show how broadly UCTT is represented among the institutional managers we track.
What do “Current Estimated Value”, “Gain/loss Since Filing”, and “Estimated Portfolio Performance” mean?
Current Estimated Value is reported share quantity from the latest 13F times our most recent split-adjusted U.S. session close. Gain/loss Since Filing is that estimate minus the reported 13F dollar value; Estimated Portfolio Performance is that difference as a percent of the reported value. Green means the estimate is above the filing value; red means below (not purchase cost). If many filers share the same implied filing price per share, the performance % may match across rows. These are not official fund marks or live quotes.