Stephen Douglas Kelley

Companies

• Onto InnovationBoard member Jan 24, 2023 to now¹
• Advanced EnergyBoard member May 11, 2021 to now²
• Advanced EnergyChief executive officer Mar 2, 2021 to now³
• Advanced EnergyPresident Mar 2, 2021 to now³
• Amkor TechnologyBoard member May 8, 2013 to May 28, 2020⁴
• Amkor TechnologyChief executive officer May 8, 2013 to May 28, 2020⁴
• Amkor TechnologyPresident May 8, 2013 to May 28, 2020⁴
• WolfspeedChief operating officer Aug 25, 2008 to Sep 6, 2011⁵

Holdings

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

Shares held

• Advanced Energy AEIS80,376 shares⁶$19.4M at $241.26Mar 10, 2026
• Onto Innovation ONTO6,384 shares⁷$1.4M at $226.01May 20, 2026

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

Recent filings

• May 20, 2026Granted 761 shares of Onto Innovation⁷
• Mar 10, 2026Sold 856 shares at $321.13 of Advanced Energy⁶
• Mar 10, 2026Sold 7,535 shares at $319.90 of Advanced Energy⁶
• Mar 10, 2026Sold 13,278 shares at $319.05 of Advanced Energy⁶
• Mar 10, 2026Sold 7,229 shares at $317.94 of Advanced Energy⁶
• Mar 10, 2026Sold 2,309 shares at $317.21 of Advanced Energy⁶
• Mar 10, 2026Sold 2,312 shares at $315.88 of Advanced Energy⁶
• Mar 10, 2026Sold 5,678 shares at $314.82 of Advanced Energy⁶
• Mar 10, 2026Sold 3,718 shares at $313.80 of Advanced Energy⁶
• Mar 10, 2026Sold 3,330 shares at $311.88 of Advanced Energy⁶
• Mar 10, 2026Sold 1,224 shares at $309.77 of Advanced Energy⁶
• Mar 10, 2026Sold 1,112 shares at $306.96 of Advanced Energy⁶
• Mar 10, 2026Sold 876 shares at $306.87 of Advanced Energy⁶
• Mar 10, 2026Sold 543 shares at $305.48 of Advanced Energy⁶
• Mar 1, 2026Shares withheld for tax 13,355 shares at $335.57 of Advanced Energy⁸
• Mar 1, 2026Exercised options 9,130 shares of Advanced Energy⁸
• Mar 1, 2026Exercised options 10,449 shares of Advanced Energy⁸
• Feb 18, 2026Shares withheld for tax 23,504 shares at $314.12 of Advanced Energy⁹
• Feb 18, 2026Exercised options 53,704 shares at $314.12 of Advanced Energy⁹
• May 21, 2025Granted 2,114 shares of Onto Innovation¹⁰
• Mar 16, 2025Shares withheld for tax 3,873 shares at $106.19 of Advanced Energy¹¹
• Mar 1, 2025Shares withheld for tax 9,361 shares at $115.17 of Advanced Energy¹²
• Mar 1, 2025Exercised options 10,450 shares of Advanced Energy¹²
• Feb 20, 2025Shares withheld for tax 11,435 shares at $131.54 of Advanced Energy¹³
• Feb 20, 2025Exercised options 26,088 shares at $131.54 of Advanced Energy¹³