Ultra Clean Holdings ($UCTT) Insider Trading & Smart Money Activity

Ultra Clean Holdings, Inc. · Semiconductor Equipment & Materials · Latest filing May 15, 2026

Ultra Clean Holdings, Inc. ($UCTT) has 2 13F position changes on file.

Insider buyers (12 mo): 0
Insider sellers (12 mo): 0
Net insider $ (12 mo): $0
Congress trades (12 mo): 0
13F moves on file: 2
Analyst ratings on file: 0

UCTT insider buying and selling by quarter

Quarter	Congress buys / sales	13F added / cut
Q1 2026	0 / 0	0 / 0
Q2 2026	0 / 0	2 / 0
Q3 2026	0 / 0	0 / 0
Q4 2026	0 / 0	0 / 0

Insider buys and sales count open-market trades only (Form 4 codes P and S). Grants, option exercises and tax withholding are left out.

All UCTT insider, congress, 13F and analyst activity

Date	Source	Who	Action	Shares	Value / amount	ΔOwn	1W	1M	6M	Filing	Story
May 15, 2026	13F	Driehaus Capital Management	Added	+608.75K sh	$151.48M		-2.2%	+32.1%			Read
May 15, 2026	13F	Driehaus Capital Management	Added	+608.75K sh	$110.39M		-2.2%	+32.1%			Read

1W / 1M / 6M = how UCTT moved from the trade or filing date.

Institutions moving UCTT (13F)

Driehaus Capital Management2

Frequently asked questions

Which institutions changed their UCTT positions?

Recent 13F filers moving the stock include Driehaus Capital Management.

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Data comes from public SEC Form 4 and 13F filings and STOCK Act disclosures. Dates are the trade or filing date reported. This page is for research only and is not investment advice.

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