Ticker · CUSIP 90385V107

UCTT

ULTRA CLEAN HLDGS INC

Technology·Semiconductor Equipment & Materials

···Share

Holders (tracked)

Combined shares

2,376,786

Combined value

$59.11M

Last close

$76.44

Quarter

2025Q4

Tracked holders · last 8 quarters

Flat over the last 8 quarters.

Price is +207.3% vs the avg quarter-end implied price across tracked holders.

SEC event timeline

16 events

Ken Griffin (Citadel Advisors) trimmed2026-02-17
−90,067 shares · 2025Q4
13F
D.E. Shaw & Co. added2026-02-17
+137,127 shares · 2025Q4
13F
Izzy Englander (Millennium Mgmt) added2026-02-17
+506,363 shares · 2025Q4
13F
T. Rowe Price added2026-02-17
+2,737 shares · 2025Q4
13F
AQR Capital Management trimmed2026-02-17
−18,401 shares · 2025Q4
13F
Ray Dalio (Bridgewater Associates) trimmed2026-02-13
−1,256 shares · 2025Q4
13F
Renaissance Technologies added2026-02-12
+16,900 shares · 2025Q4
13F
First Eagle Investment Management added2026-02-04
+8,000 shares · 2025Q4
13F
Paul Tudor Jones (Tudor Investment) exited2025-12-09
−91,019 shares · 2025Q3
13F
AQR Capital Management added2025-11-14
+34,815 shares · 2025Q3
13F
Izzy Englander (Millennium Mgmt) trimmed2025-11-14
−28,396 shares · 2025Q3
13F
D.E. Shaw & Co. trimmed2025-11-14
−49,231 shares · 2025Q3
13F
T. Rowe Price added2025-11-14
+2,056 shares · 2025Q3
13F
Ray Dalio (Bridgewater Associates) opened position2025-11-13
+10,393 shares · 2025Q3
13F
Renaissance Technologies trimmed2025-11-13
−167,700 shares · 2025Q3
13F
First Eagle Investment Management added2025-11-12
+42,430 shares · 2025Q3
13F

Insider activity

No insider transactions in the last 30 days.

View full insider history for UCTT →

Follow-the-investor returns

If you'd copied each holder of UCTT…

Cost basis inferred from 13F share-delta history. Sorted by % return on the position they're still holding.

Investor	First in	Cost basis	Return	Position value today
T. Rowe Price	2016Q1	$5.34	+1331.5%	$3.3M
Renaissance Technologies	2016Q1	$23.17	+229.8%	$8.1M
Izzy Englander (Millennium Mgmt)	2016Q1	$25.42	+200.7%	$42.8M
D.E. Shaw & Co.	2016Q1	$25.64	+198.1%	$72.8M
Ken Griffin (Citadel Advisors)	2016Q2	$26.16	+192.2%	$818K
Ken Griffin (Citadel Advisors)	2016Q2	$26.16	+192.2%	$818K
Ken Griffin (Citadel Advisors)	2016Q2	$26.16	+192.2%	$818K
Ray Dalio (Bridgewater Associates)	2025Q3	$27.25	+180.5%	$698K
AQR Capital Management	2016Q1	$32.28	+136.8%	$16.7M
First Eagle Investment Management	2021Q2	$32.47	+135.4%	$31.4M

Who moved on this name in 2025Q4

13F transactions reported for the latest quarter, grouped by direction.

New positions0

—

Added to5

Izzy Englander (Millennium Mgmt)
+506,363
$12.8M
D.E. Shaw & Co.
+137,127
$3.5M
Renaissance Technologies
+16,900
$428K
First Eagle Investment Management
+8,000
$203K
T. Rowe Price
+2,737
$69

Trimmed3

Ken Griffin (Citadel Advisors)
−90,067
$2.3M
AQR Capital Management
−18,401
$466K
Ray Dalio (Bridgewater Associates)
−1,256
$32K

Exited0

—

Institutional ownership over time

Distinct super-investors holding this ticker · combined dollar value, by quarter.

Quarter	Holders	Shares	Combined value	Δ holders
2022Q1	11	9,215,596	$390.6M	—
2022Q2	11	8,645,303	$257.4M	—
2022Q3	12	8,648,481	$223K	+1
2022Q4	11	8,712,757	$280.5M	-1
2023Q1	12	8,152,417	$260.6M	+1
2023Q2	12	7,833,780	$294.4M	—
2023Q3	14	7,934,085	$231.5M	+2
2023Q4	11	8,032,107	$271.1M	-3
2024Q1	10	8,390,431	$379.6M	-1
2024Q2	11	8,195,103	$400.2M	+1
2024Q3	12	1,499,104	$57.0M	+1
2024Q4	12	1,570,494	$53.9M	—
2025Q1	10	1,471,714	$29.9M	-2
2025Q2	10	2,087,585	$46.3M	—
2025Q3	10	1,856,283	$49.5M	—
2025Q4	10	2,376,786	$59.1M	—

Who owns UCTT

10 super-investors · 2025Q4

Tracked stake

2.38M

Combined value

$59M

% of shares outstanding

—

shares-out unknown

Quarter action mix

Added5Trim5

#	Manager	Shares	Value	% of book	Last action
1	D.E. Shaw & Co.	952.2K	$24M	0.0%	Added+137.1K
2	Izzy Englander Millennium Mgmt	560.0K	$14M	0.0%	Added+506.4K
3	First Eagle Investment Management	410.6K	$10M	0.0%	Added+8.0K
4	AQR Capital Management	218.7K	$6M	0.0%	Trim−18.4K
5	Renaissance Technologies	106.4K	$3M	0.0%	Added+16.9K
6	Ken Griffin Citadel Advisors	34.8K	$881K	0.0%	Trim−90.1K
7	Ken Griffin Citadel Advisors	31.3K	$793K	0.0%	Trim−90.1K
8	Ken Griffin Citadel Advisors	10.7K	$271K	0.0%	Trim−90.1K
9	Ray Dalio Bridgewater Associates	9.1K	$231K	0.0%	Trim−1.3K
10	T. Rowe Price	43.1K	$1K	0.0%	Added+2.7K

Recent moves

20 transactions

TRIMKen Griffin (Citadel Advisors)
−90,067 · 2025Q4
ADDT. Rowe Price
+2,737 · 2025Q4
ADDD.E. Shaw & Co.
+137,127 · 2025Q4
ADDIzzy Englander (Millennium Mgmt)
+506,363 · 2025Q4
TRIMAQR Capital Management
−18,401 · 2025Q4
TRIMRay Dalio (Bridgewater Associates)
−1,256 · 2025Q4
ADDRenaissance Technologies
+16,900 · 2025Q4
ADDFirst Eagle Investment Management
+8,000 · 2025Q4
SOLDPaul Tudor Jones (Tudor Investment)
−91,019 · 2025Q3
TRIMD.E. Shaw & Co.
−49,231 · 2025Q3
ADDAQR Capital Management
+34,815 · 2025Q3
ADDT. Rowe Price
+2,056 · 2025Q3
TRIMIzzy Englander (Millennium Mgmt)
−28,396 · 2025Q3
NEWRay Dalio (Bridgewater Associates)
+10,393 · 2025Q3
TRIMRenaissance Technologies
−167,700 · 2025Q3
ADDFirst Eagle Investment Management
+42,430 · 2025Q3
ADDPaul Tudor Jones (Tudor Investment)
+54,270 · 2025Q2
ADDIzzy Englander (Millennium Mgmt)
+63,966 · 2025Q2
ADDD.E. Shaw & Co.
+308,540 · 2025Q2
TRIMT. Rowe Price
−36,913 · 2025Q2

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