Form4insider filings, from the source

Company · CIK 0001275014 · SIC 3674 — Semiconductors & Related Devices · Nasdaq

Ultra Clean Holdings, Inc. · UCTT

Insider activity reported against this company. All insider holders · On EDGAR ↗

1M3M6M1Y2YAll datashares as filed — not split-adjusted
Open-market buys & salesbuys $0 · 0sales $4.8M · 5net −$4.8M
$10k$10k$100k$100k$1M$1M$10M$10MbuyssalesSep 2025Nov 2025Jan 2026Mar 2026May 2026Jul 2026Sep 2026

Reported at this company — common stock

TradeReported (ET)InsiderSharesAvg priceTotalOwned afterΔ stakeFlags
Aug 31, 2026 AForm 4 →Sep 4, 6:23 pm EDTMichael Dennis KeoghChief Financial Officer20,917——20,917— late
Aug 31, 2026 FForm 4 →Sep 2, 8:36 pm EDTChristopher S CookPresident, Products Division12,497$67.83$847,67298,126—
Jul 2, 2026 SForm 4 →Jul 7, 7:06 pm EDTBrian E HardingChief Accounting Officer3,837$128.75$494,02033,581−10.3%10b5-1
Jun 26, 2026 AForm 4 →Jun 30, 9:35 pm EDTBrian E HardingChief Accounting Officer9,363——37,418—
Jun 4, 2026 SForm 4 →Jun 9, 5:09 pm EDTSheri SavageCFO14,421$89.45$1,289,91566,476−17.8%10b5-1 late
Jun 4, 2026 SForm 4 →Jun 9, 5:08 pm EDTSheri SavageCFO15,766$89.47$1,410,55650,710−23.7%10b5-1 late
Jun 4, 2026 SForm 4 →Jun 8, 7:59 pm EDTBrian E HardingChief Accounting Officer16,988$89.47$1,519,89228,055−37.7%10b5-1
Jun 2, 2026 SForm 4 →Jun 4, 7:36 pm EDTPaul Yoonku ChoGeneral Counsel and Secretary944$89.37$84,36522,941−3.95%

Reported at this company — derivatives (options, RSUs, warrants)

No reported derivative activity in this period.