HARDING BRIAN E 4

What Happened
Brian E. Harding, Chief Accounting Officer of Ultra Clean Holdings, sold a total of 3,837 shares in open-market transactions on July 2, 2026. The sales broke down as: 440 shares at $126.92 ($55,843), 2,194 shares at $128.37 ($281,638), and 1,203 shares at $130.12 ($156,539), for aggregate proceeds of approximately $494,020. These were outright sales (code S) rather than purchases or option exercises.

Key Details

• Transaction date: July 2, 2026 (reported on Form 4 filed July 7, 2026).
• Tranche details and price ranges (per footnotes):
  • 440 shares, weighted avg $126.92 (individual prices ranged $126.3500–$127.1650).
  • 2,194 shares, weighted avg $128.37 (individual prices ranged $127.5050–$128.5000).
  • 1,203 shares, weighted avg $130.12 (individual prices ranged $129.5900–$130.2400).
• Total shares sold: 3,837; total proceeds: ~$494,020.
• Shares owned after the transaction: not provided in the summary above (see the filed Form 4 for updated holdings).
• Notable footnotes: sale was made pursuant to a Rule 10b5-1 trading plan adopted March 5, 2026 (footnote F1); F2–F4 note weighted-average prices and provide ranges and availability of per-price breakdowns on request.
• Transaction code: S = Sale (open-market/private sale).

Context
Sales executed under a pre-established 10b5-1 trading plan are common for officers and are generally considered routine because the trades are scheduled in advance; they do not necessarily signal a change in the insider’s view of the company. Form 4s are typically filed within two business days of the transaction—this report shows the trade date (7/2/2026) and a filing date (7/7/2026); check the SEC filing for any timeliness notes.