HARDING BRIAN E 4

What Happened
Brian E. Harding, Chief Accounting Officer of Ultra Clean Holdings, sold a total of 16,988 shares in open-market transactions on June 4, 2026 (transaction code S). The sales generated aggregate proceeds of approximately $1,519,892 — an overall weighted-average sale price of roughly $89.47 per share. Individual tranches ranged from 54 shares up to 1,933 shares at prices listed between about $85.54 and $91.82.

Key Details

• Transaction date: June 4, 2026; Form 4 filed June 8, 2026 (filing appears timely — within the SEC’s two-business-day window).
• Total shares sold: 16,988; total proceeds: ~$1,519,892; weighted-average price: ≈ $89.47/share.
• Price range reported across tranches: approx. $85.5350 to $91.8200 (several footnotes indicate tranche-level weighted averages and narrower price ranges).
• Shares owned after the transaction: Not disclosed in the provided excerpt of the filing.
• Notable footnotes: Multiple footnotes (F1–F21) state that the reported prices are weighted averages for groups of sales and that the reporting person will provide detailed per-price counts on request.

Context

• This filing documents outright open-market sales (S). Sales are routinely reported by insiders for diversification, tax planning or other personal reasons and do not by themselves indicate company performance or insider sentiment.
• Purchases generally carry more direct signals of insider confidence; this report contains no purchases, option exercises, awards, or gifts.