Stephen Douglas Kelley
Stephen Douglas Kelley: President and CEO · Director at Advanced Energy Industries and Director at Onto Innovation. What Stephen Douglas Kelley holds in 2 AI and semiconductor companies tracked on Silicon Floor, from their SEC filings, broken down: the shares held and how, then any restricted shares, options or other rights declared.
Advanced Energy Industries (AEIS)
Stephen Douglas Kelley holds 80,376 Advanced Energy Industries shares (0.20% of the company), worth about $23.8M at the last price, according to the Form 4 of Mar 10, 2026.
- Shares held: 80,376 (0.20%), $23.8M — Held in their own name.
- Share units: 29,880 (0.07%), $8.8M — Advanced Energy Industries promised them as pay: each unit becomes a share when it vests, if its conditions are met. No vote until then.
Onto Innovation (ONTO)
Stephen Douglas Kelley holds 6,384 Onto Innovation shares (0.01% of the company), worth about $2.1M at the last price, according to the Form 4 of May 20, 2026.
- Shares held: 6,384 (0.01%), $2.1M — Held in their own name.
Declarations
- Onto Innovation (ONTO) — Form 4 of May 20, 2026: grant or award of 761; 6,384 shares after 0001443674-26-000008
- Advanced Energy Industries (AEIS) — Form 4 of Mar 10, 2026 (President and CEO): open-market sale of 543 at $305.48; open-market sale of 876 at $306.87; 80,376 shares after 0001443674-26-000004
- Advanced Energy Industries (AEIS) — Form 4 of Mar 1, 2026 (President and CEO): option exercise or conversion of 10,449; option exercise or conversion of 9,130; 130,376 shares after 0001443674-26-000002
- Advanced Energy Industries (AEIS) — Form 4 of Feb 18, 2026 (President and CEO): option exercise or conversion of 53,704 at $314.12; shares withheld for tax of 23,504 at $314.12; 124,152 shares after 0001193125-26-061749
- Onto Innovation (ONTO) — Form 4 of May 21, 2025: grant or award of 2,114; 5,623 shares after 0002022859-25-000058
- Advanced Energy Industries (AEIS) — Form 4 of Mar 16, 2025 (President and CEO): shares withheld for tax of 3,873 at $106.19; 93,952 shares after 0000950170-25-040900
- Advanced Energy Industries (AEIS) — Form 4 of Mar 1, 2025 (President and CEO): option exercise or conversion of 10,450; shares withheld for tax of 9,361 at $115.17; 97,825 shares after 0000950170-25-032823
- Advanced Energy Industries (AEIS) — Form 4 of Feb 20, 2025 (President and CEO): option exercise or conversion of 26,088 at $131.54; shares withheld for tax of 11,435 at $131.54; 96,736 shares after 0000950170-25-025052
Sources: SEC Schedules 13D and 13G (stakes above 5%, which count everything a person votes or can acquire within 60 days) and Forms 3, 4 and 5 (the shares a director, officer or 10% owner holds, filed within two business days of each trade). Values at the last price.