Christopher S. Cook

Companies

• Ultra Clean Holdings, Inc.President May 9, 2022 to now¹

Holdings

Stock this person has reported owning, from the forms officers and directors file with the SEC. See the biggest insider stakes.

Shares held

• UCUltra Clean Holdings, Inc. UCTT102,226 shares²$5.7M at $55.83Sep 2, 2026

As of each latest filing. The line shows shares held over time.

Recent filings

• Aug 31, 2026Shares withheld for tax 12,497 shares at $67.83 of Ultra Clean Holdings, Inc.²
• May 22, 2026Granted 13,196 shares of Ultra Clean Holdings, Inc.³
• May 4, 2026Sold 1,231 shares at $74.55 of Ultra Clean Holdings, Inc.⁴
• May 4, 2026Sold 10,247 shares at $73.89 of Ultra Clean Holdings, Inc.⁴
• Apr 30, 2026Sold 11,903 shares at $75.31 of Ultra Clean Holdings, Inc.⁵
• Apr 30, 2026Shares withheld for tax 3,165 shares at $78.15 of Ultra Clean Holdings, Inc.⁵
• Apr 30, 2026Shares withheld for tax 4,181 shares at $78.15 of Ultra Clean Holdings, Inc.⁵
• Apr 30, 2026Shares withheld for tax 1,861 shares at $78.15 of Ultra Clean Holdings, Inc.⁵
• Aug 29, 2025Granted 73,686 shares of Ultra Clean Holdings, Inc.⁶
• Apr 30, 2025Shares withheld for tax 2,550 shares at $18.71 of Ultra Clean Holdings, Inc.⁷
• Apr 30, 2025Shares withheld for tax 2,225 shares at $18.71 of Ultra Clean Holdings, Inc.⁷
• Apr 30, 2025Shares withheld for tax 1,855 shares at $18.71 of Ultra Clean Holdings, Inc.⁷
• Apr 25, 2025Granted 27,831 shares of Ultra Clean Holdings, Inc.⁸
• Mar 7, 2025Bought 4,100 shares at $25.30 of Ultra Clean Holdings, Inc.⁹
• May 9, 2024Sold 8,586 shares at $43.51 of Ultra Clean Holdings, Inc.¹⁰
• Apr 30, 2024Shares withheld for tax 2,542 shares at $41.83 of Ultra Clean Holdings, Inc.¹¹
• Apr 30, 2024Shares withheld for tax 2,219 shares at $41.83 of Ultra Clean Holdings, Inc.¹¹
• Apr 26, 2024Granted 15,560 shares of Ultra Clean Holdings, Inc.¹²
• Nov 14, 2023Sold 4,662 shares at $26.68 of Ultra Clean Holdings, Inc.¹³
• Apr 30, 2023Shares withheld for tax 2,464 shares at $28.54 of Ultra Clean Holdings, Inc.¹⁴
• Apr 28, 2023Granted 18,661 shares of Ultra Clean Holdings, Inc.¹⁴