Ticker · held by 4 filers

UCTT

ULTRA CLEAN HLDGS INC

All tracked filers currently holding UCTT, ranked by position size. Each row links through to the filer's full portfolio.

Total value held

$344.2M

Total shares

7,118,422

Filers holding

4 · 6 positions

Caveat

long only · 13F-eligible managers only

Filers holding UCTT

sorted by position size · click any filer to see their full portfolio

# Filer Class Shares Value (USD) % of port

1 BlackRock · Larry Fink COM 6,926,066 $339.4M 0.01%

2 Renaissance Technologies · Jim Simons (founder) COM 106,400 $2.7M 0.00%

3 Citadel Advisors · Ken Griffin PUTCOM 34,800 $881.5K 0.00%

4 Citadel Advisors · Ken Griffin COM 31,319 $793.3K 0.00%

5 Citadel Advisors · Ken Griffin CALLCOM 10,700 $271.0K 0.00%

6 Bridgewater Associates · Ray Dalio (founder) COM 9,137 $231.4K 0.00%

What this is

This page reverses the usual 13F view: instead of "what does Buffett hold," it answers "who holds NVDA?" Across the dozen tracked filers, all current 13F-disclosed holders of UCTT are listed, with the position size and what fraction of each filer's overall portfolio it represents.

Caveats: only the filers tracked here are included (~12 names) — not the whole 13F universe (~6,000 filers). Position values are at the most recent quarter-end, not current market price. Only long positions are visible; shorts and synthetics aren't.

v0.2 · 2026 · data via SEC EDGAR · CUSIP→ticker via OpenFIGI