Ultra Clean Holdings UCTT Institutional Ownership

NASDAQ UCTT

$76.43 +3.42 (+4.68%)

At close: Aug 21, 2026 · 4:00 PM EDT

Institutions by Trading Activity

326 Institutions

Increased 214 65.6%

Unchanged 32 9.8%

Reduced 80 24.5%

Ownership Statistics

13F · as of 31 Mar, 2026

Institutional Ownership

100.22%

▲+5.32 pp QoQ

Shares Held by Institutions

45.40Mn

of 45.30Mn outstanding

▲+26.49% QoQ

Shares Outstanding

45.30Mn

-99.01K held outside 13F filers

Institutional Investors

326

filed 13F for Mar 2026

▲+98 vs prior quarter

Net Shares Added (QoQ)

+9.51Mn

accumulated since last quarter

Value of Holdings

$3.71Bn

reported market value

Shares Owned by Institutions

Shares held % of outstanding

Latest —

Average ownership —

Peak ownership —

Shares Purchased/Sold by Institutions

Accumulated Distributed

Latest quarter —

Net over range —

Accumulating quarters —

Ownership Summary

Quarter ending 31 Mar, 2026

Ultra Clean Holdings, Inc. (NASDAQ:UCTT) has 326 institutional investors with active 13F positions as of March 2026.

These investors held 100.2% of outstanding shares in March 2026, up from 94.9% in December 2025.
They increased total shares held in UCTT by 26.49% quarter over quarter, and investors in Ultra Clean Holdings increased 43.61% from a year ago.
Of these 326 funds, 214 grew their exposure to Ultra Clean Holdings, 80 cut back, and 32 maintained positions.
Institutional investors collectively held 45.4Mn shares in Ultra Clean Holdings as of March 2026, up by 9.51Mn shares quarter on quarter, and up 1.91Mn shares year over year.
BlackRock, Inc. is the top holder of Ultra Clean Holdings as of March 31, 2026, with 6.83Mn shares representing 15.08% of outstanding stock.
Top purchasers of UCTT stock for the quarter ending March 2026 included VANGUARD PORTFOLIO MANAGEMENT LLC (2.8Mn), VANGUARD CAPITAL MANAGEMENT LLC (1.92Mn), Boston Partners (1.47Mn), DRIEHAUS CAPITAL MANAGEMENT LLC (608.75K), COOPER CREEK PARTNERS MANAGEMENT LLC (586.77K).
The largest sales of UCTT for the quarter ending March 2026 came from Invesco Ltd. (1.74Mn), FRONTIER CAPITAL MANAGEMENT CO LLC (1.72Mn), Goldman Sachs Group Inc (613.02K), Divisar Capital Management LLC (529.28K), DIMENSIONAL FUND ADVISORS LP (513.08K).
Ultra Clean Holdings's 10 largest shareholders as of March 2026 include BlackRock, Inc. (6.83Mn), VANGUARD PORTFOLIO MANAGEMENT LLC (2.8Mn), VANGUARD CAPITAL MANAGEMENT LLC (1.92Mn), State Street Corp (1.84Mn), FRONTIER CAPITAL MANAGEMENT CO LLC (1.79Mn), Invesco Ltd. (1.66Mn), Boston Partners (1.47Mn), D. E. Shaw & Co., Inc. (1.18Mn), GEODE CAPITAL MANAGEMENT, LLC (1.14Mn), DRIEHAUS CAPITAL MANAGEMENT LLC (1.06Mn) per Business Quant data.

Form 13F Holdings

326 Institutional Holders

Report period 31 Mar, 2026

Total shares held 45.40Mn

Of outstanding 100.22%

#	Institution	CIK	Shares Held	% of Outstanding	Change (QoQ)	Change (%)	Value (USD)
1	BlackRock, Inc.	0002012383	6,832,619	15.08%	▲113,167	+1.68%	$424.85Mn
2	VANGUARD PORTFOLIO MANAGEMENT LLC	0002100121	2,802,250	6.19%	▲2,802,250	0.00%	$174.24Mn
3	VANGUARD CAPITAL MANAGEMENT LLC	0002100119	1,916,501	4.23%	▲1,916,501	0.00%	$119.17Mn
4	State Street Corp	0000093751	1,837,824	4.06%	▼14,658	-0.79%	$114.28Mn
5	FRONTIER CAPITAL MANAGEMENT CO LLC	0000351173	1,787,451	3.95%	▼1,722,388	-49.07%	$111.14Mn
6	Invesco Ltd.	0000914208	1,659,949	3.66%	▼1,739,885	-51.18%	$103.22Mn
7	Boston Partners	0001386060	1,468,878	3.24%	▲1,468,878	0.00%	$91.40Mn
8	D. E. Shaw & Co., Inc.	0001009207	1,183,257	2.61%	▲231,103	+24.27%	$73.57Mn
9	GEODE CAPITAL MANAGEMENT, LLC	0001214717	1,140,780	2.52%	▲51,351	+4.71%	$70.95Mn
10	DRIEHAUS CAPITAL MANAGEMENT LLC	0000938206	1,062,376	2.35%	▲608,746	+134.19%	$66.06Mn
11	DIMENSIONAL FUND ADVISORS LP	0000354204	1,011,778	2.23%	▼513,079	-33.65%	$62.89Mn
12	Morgan Stanley	0000895421	911,700	2.01%	▲17,277	+1.93%	$56.69Mn
13	First Eagle Investment Management, LLC	0001325447	868,200	1.92%	▲457,631	+111.46%	$53.98Mn
14	CHARLES SCHWAB INVESTMENT MANAGEMENT INC	0000884546	840,456	1.86%	▲19,368	+2.36%	$52.26Mn
15	ROYCE & ASSOCIATES LP	0000906304	759,497	1.68%	▼339,196	-30.87%	$47.23Mn
16	MILLENNIUM MANAGEMENT LLC	0001273087	685,436	1.51%	▲125,481	+22.41%	$42.62Mn
17	OBERWEIS ASSET MANAGEMENT INC/	0000937886	640,476	1.41%	▲11,976	+1.91%	$39.82Mn
18	PARADIGM CAPITAL MANAGEMENT INC/NY	0001037792	608,200	1.34%	0	0.00%	$37.82Mn
19	COOPER CREEK PARTNERS MANAGEMENT LLC	0001512162	586,773	1.30%	▲586,773	0.00%	$36.49K
20	TWO SIGMA INVESTMENTS, LP	0001179392	581,131	1.28%	▲581,131	0.00%	$36.13Mn

Showing 1 to 20 of 326 holders