Ernest E. Maddock

Companies

• OusterBoard member Feb 14, 2023 to now¹
• TeradyneBoard member Nov 16, 2022 to now²
• AvnetBoard member Aug 26, 2021 to now³
• Ultra Clean Holdings, Inc.Board member Jun 1, 2018 to now⁴
• Velodyne Lidar, Inc.Board member Jan 18, 2022 to Feb 13, 2023⁵
• Micron TechnologyChief financial officer Jun 5, 2015 to Oct 26, 2017⁶
• Riverbed TechnologyChief financial officer May 8, 2013 to Apr 28, 2015⁷
• Lam ResearchChief financial officer Mar 2, 2009 to Mar 6, 2013⁸
• Lam ResearchSenior Vice President Sep 26, 2008 to Sep 26, 2008⁹

Holdings

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

Shares held

• Teradyne TER10,269 shares¹⁰$3.5M at $340.36Sep 25, 2026
• UCUltra Clean Holdings, Inc. UCTT58,816 shares¹¹$3.1M at $53.26May 27, 2026
• Ouster OUST88,902 shares¹²$2.6M at $28.95Jun 17, 2026
• Avnet AVT5,265 shares¹³$473.7K at $89.97Sep 25, 2026
• VLVelodyne Lidar, Inc.0 shares¹⁴Feb 10, 2023

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

Recent filings

• Sep 25, 2026Other 2 shares of Teradyne¹⁰
• Jun 17, 2026Granted 4,725 shares of Ouster¹²
• Jun 12, 2026Other 2 shares of Teradyne¹⁵
• May 22, 2026Granted 2,575 shares of Ultra Clean Holdings, Inc.¹¹
• May 8, 2026Granted 668 shares of Teradyne¹⁶
• Mar 13, 2026Other 2 shares of Teradyne¹⁷
• Dec 17, 2025Other 2 shares of Teradyne¹⁸
• Sep 29, 2025Other 3 shares of Teradyne¹⁹
• Jun 18, 2025Granted 1,500 shares of Ouster²⁰
• Jun 18, 2025Granted 13,558 shares of Ouster²⁰
• Jun 13, 2025Other 6 shares of Teradyne²¹
• May 21, 2025Granted 8,198 shares of Ultra Clean Holdings, Inc.²²
• May 9, 2025Granted 2,971 shares of Teradyne²³
• Mar 14, 2025Other 3 shares of Teradyne²⁴
• Mar 7, 2025Bought 10,000 shares at $24.29 of Ultra Clean Holdings, Inc.²⁵
• Dec 18, 2024Other 2 shares of Teradyne²⁶
• Sep 27, 2024Other 2 shares of Teradyne²⁷
• Aug 16, 2024Bought 8,000 shares at $7.79 of Ouster²⁸
• Jun 21, 2024Granted 15,195 shares of Ouster²⁹
• Jun 14, 2024Other 2 shares of Teradyne³⁰
• May 22, 2024Granted 3,647 shares of Ultra Clean Holdings, Inc.³¹
• May 9, 2024Granted 1,876 shares of Teradyne³²
• Feb 1, 2024Bought 1,000 shares at $94.07 of Teradyne³³
• Nov 15, 2023Bought 7,000 shares at $5.29 of Ouster³⁴
• Aug 21, 2023Bought 7,000 shares at $6.02 of Ouster³⁵

Trade performance

Returns are price-only (no dividends), measured from the trade date.