13F Insight
DOSSIER · 13F Holders · Q1 2026Technology · Semiconductors & Related Devices
UCTT

ULTRA CLEAN HLDGS INC

373 institutions still hold ULTRA CLEAN HLDGS INC as of Q1 2026. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP 90385V107·Semiconductors & Related Devices·373 13F holders·last filed Mar 31, 2026
Market cap
—
13F value held
$2.0B
visible holders
Holders
373
filers reporting
Concentration
21.34%
BlackRock, Inc. #1
top holder share
AI Holders Summary · Q1 2026

373 institutions reported UCTT in Q1 2026. BlackRock, Inc. leads at 21.3% of the visible book.

Top holders

Sorted by position value. Source: SEC EDGAR 13F-HR filings.

#HolderValueShares% port.Quarter
01
BlackRock, Inc.
CIK 0002012383
$425M6.8M0.01%Q1 202602
Vanguard Portfolio Management
CIK 0002100121· Index
$174M2.8M0.01%Q1 202603
SUSQUEHANNA INTERNATIONAL GROUP, LLP
CIK 0001446194· Market maker
$137M2.2M0.02%Q1 202604
TORONTO DOMINION BANK
CIK 0000947263
$132M2.1M0.19%Q1 202605
VANGUARD CAPITAL MANAGEMENT LLC
CIK 0002100119· Index
$119M1.9M0.00%Q1 202606
STATE STREET CORP
CIK 0000093751
$114M1.8M0.00%Q1 202607
FRONTIER CAPITAL MANAGEMENT CO LLC
CIK 0000351173
$111M1.8M1.14%Q1 202608
Invesco Ltd.
CIK 0000914208
$103M1.7M0.01%Q1 202609
Boston Partners
CIK 0001386060
$91M1.5M0.10%Q1 202610
GEODE CAPITAL MANAGEMENT, LLC
CIK 0001214717· Index
$71M1.1M0.00%Q1 202611
DRIEHAUS CAPITAL MANAGEMENT LLC
CIK 0000938206
$66M1.1M0.49%Q1 202612
UBS Group AG
CIK 0001610520
$66M1.1M0.01%Q1 202613
DIMENSIONAL FUND ADVISORS LP
CIK 0000354204· Quasi-passive
$63M1.0M0.01%Q1 202614
MORGAN STANLEY
CIK 0000895421
$57M912K0.00%Q1 202615
CHARLES SCHWAB INVESTMENT MANAGEMENT INC
CIK 0000884546· Index
$52M840K0.01%Q1 202616
ROYCE & ASSOCIATES LP
CIK 0000906304
$47M759K0.47%Q1 202617
MILLENNIUM MANAGEMENT LLC
CIK 0001273087
$44M710K0.02%Q1 202618
OBERWEIS ASSET MANAGEMENT INC/
CIK 0000937886
$40M640K1.18%Q1 202619
Assenagon Asset Management S.A.
CIK 0001546007· Quasi-passive
$40M278K0.05%Q2 202620
PARADIGM CAPITAL MANAGEMENT INC/NY
CIK 0001037792
$38M608K1.45%Q1 2026
Page 1 of 19
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Insiders at ULTRA CLEAN HLDGS INC
Harding Brian E →Savage Sheri →