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UCTTInformation TechnologyCommon Stock

Ultra Clean Holdings, Inc

Held by 10 tracked managers as of Q2 2026 · CUSIP ⓘCUSIP: A 9-character ID for one specific security - one share class of one company, or one bond. Tickers can change and can mean different things in different countries; a CUSIP always identifies exactly the same security, which is why filings use it. Guide 90385V107 · Sector ⓘGICS sectors: The 11-sector system most investors know (Global Industry Classification Standard): Technology, Health Care, Financials and so on. This site assigns each company a GICS-style sector from its SIC code, with a few hand corrections, so sector pages match the names investors expect. Guide

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In plain English: 10 of the investors we track own this stock. In the latest quarter, 3 of them bought more of it and 7 sold some or all of theirs (2 bought it for the first time). That tells you what they did last quarter — not what the stock will do next.

Educational and informational only, not personalized investment advice. Based on public filings that may be delayed or contain errors; verify with the original filings. Disclaimer

Managers holding
10
+2 vs last quarter (like-for-like)
Total value held
$601.02M
Across tracked managers
Average weight ⓘOn average, how big this stock is in the portfolios that own it (its share of each manager's reported portfolio value).
0.1%
Of each manager's book
QoQ value ⓘLike-for-like: only managers that filed both quarters are compared, so a manager filing late (or confidentially) does not look like buying or selling. Includes price changes.
+$274.41M
+84.0% vs last quarter
Net shares bought
-1.0M
Est. net flow -$145.60M
Quarter activity
3 bought · 7 sold
2 new · 0 sold out

Tracked capital in this stock

Total value held (area) and number of managers (line). Dips can mean a large holder filed that quarter confidentially (e.g. Norges Bank in Q1/Q3).

Chart: Tracked capital in this stock

Aggregate buying and selling

Net share change reported each quarter

Chart: Aggregate buying and selling

Who owns UCTT?

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Who owns UCTT? — Q2 2026

Holders ranked by position size, with each one's quarter-over-quarter change.

CSV Excel
Column filters

Numbers accept 1.5M, 2B, 250K. Percent columns take percent (5 = 5%).

# Manager Fund Shares Value ↓ % of their portfolio QoQ Δ shares Δ shares % Est. Δ value ⓘChange in shares × this quarter's price
1 Boston Partners Boston Partners Global Investors 1.36M $191.89M 0.2% Reduced -108.7K -7.4% -$15.33M
2 Chuck Royce Royce & Associates 666.50K $95.04M 0.8% Reduced -93.0K -12.2% -$13.26M
3 David Shaw D.E. Shaw & Co. 619.80K $88.38M 0.1% Reduced -563.5K -47.6% -$80.34M
4 Two Sigma Two Sigma Investments 609.85K $86.96M 0.1% Added +28.7K +4.9% +$4.10M
5 Israel Englander Millennium Management 388.20K $55.35M 0.0% Reduced -297.2K -43.4% -$42.38M
6 Matthew McLennan First Eagle Investment Management 347.93K $49.61M 0.1% Reduced -86.2K -19.9% -$12.29M
7 Jim Simons Renaissance Technologies 91.90K $13.10M 0.0% New +91.9K — +$13.10M
8 Ken Griffin Citadel Advisors 82.50K $11.76M 0.0% Reduced -56.7K -40.7% -$8.09M
9 Steve Cohen Point72 Asset Management 62.44K $8.90M 0.0% New +62.4K — +$8.90M
10 Barrow Hanley Barrow Hanley Mewhinney & Strauss 138 $19.68K 0.0% Reduced -63 -31.3% -$8.98K

Sold out completely this quarter

CSV Excel
Column filters

Numbers accept 1.5M, 2B, 250K. Percent columns take percent (5 = 5%).

No tracked manager sold out of this stock this quarter.

Politician trades

Politician trades in UCTT

CSV Excel
Column filters

Numbers accept 1.5M, 2B, 250K. Percent columns take percent (5 = 5%).

No politician trades match these filters.