Insider Trades
SEC Form 4 filings — transactions by corporate insiders.
38 total trades for ONTO
| Ticker | Insider | Type | Date | Shares | Value | Filing |
|---|---|---|---|---|---|---|
| ONTO | Mark Slicer | — | — | — | — | SEC ↗ |
| ONTO | David Brian Miller | Sale | 2026-09-29 | 2,000 | $600K | SEC ↗ |
| ONTO | Shirley Chen | Tax Withhold | 2026-09-02 | 1,516 | $386K | SEC ↗ |
| ONTO | Brian K Roberts | Tax Withhold | 2026-09-02 | 3,239 | $824K | SEC ↗ |
| ONTO | Susan D Lynch | Sale | 2026-08-21 | 1,000 | $302K | SEC ↗ |
| ONTO | Stephen Douglas Kelley | Grant | 2026-05-20 | 761 | $0 | SEC ↗ |
| ONTO | Susan D Lynch | Grant | 2026-05-20 | 761 | $0 | SEC ↗ |
| ONTO | David Brian Miller | Grant | 2026-05-20 | 761 | $0 | SEC ↗ |
| ONTO | Stephen S Schwartz | Grant | 2026-05-20 | 761 | $0 | SEC ↗ |
| ONTO | Christopher A Seams | Grant | 2026-05-20 | 761 | $0 | SEC ↗ |
| ONTO | May Su | Grant | 2026-05-20 | 761 | $0 | SEC ↗ |
| ONTO | Yoon Ah Oh | Tax Withhold | 2026-05-15 | 530 | $144K | SEC ↗ |
| ONTO | Ramil Yaldaei | Tax Withhold | 2026-05-15 | 843 | $229K | SEC ↗ |
| ONTO | Yoon Ah Oh | Tax Withhold | 2026-03-03 | 417 | $87K | SEC ↗ |
| ONTO | Plisinski Michael P | Tax Withhold | 2026-03-03 | 3,742 | $776K | SEC ↗ |
| ONTO | Ramil Yaldaei | Tax Withhold | 2026-03-03 | 615 | $128K | SEC ↗ |
| ONTO | Ido Dolev | Tax Withhold | 2026-03-03 | 819 | $170K | SEC ↗ |
| ONTO | Shirley Chen | Grant | 2026-03-02 | 3,784 | — | SEC ↗ |
| ONTO | Yoon Ah Oh | Grant | 2026-03-02 | 3,612 | — | SEC ↗ |
| ONTO | Plisinski Michael P | Grant | 2026-03-02 | 21,718 | — | SEC ↗ |
| ONTO | Ramil Yaldaei | Grant | 2026-03-02 | 9,231 | — | SEC ↗ |
| ONTO | Ido Dolev | Grant | 2026-03-02 | 5,160 | — | SEC ↗ |
| ONTO | Brian K Roberts | Grant | 2026-03-02 | 4,644 | — | SEC ↗ |
| ONTO | Yoon Ah Oh | Exercise | 2026-03-01 | 941 | — | SEC ↗ |
| ONTO | Yoon Ah Oh | Tax Withhold | 2026-03-01 | 574 | $124K | SEC ↗ |
| ONTO | Plisinski Michael P | Exercise | 2026-03-01 | 5,971 | — | SEC ↗ |
| ONTO | Plisinski Michael P | Tax Withhold | 2026-03-01 | 4,147 | $895K | SEC ↗ |
| ONTO | Ramil Yaldaei | Exercise | 2026-03-01 | 844 | — | SEC ↗ |
| ONTO | Ramil Yaldaei | Tax Withhold | 2026-03-01 | 623 | $134K | SEC ↗ |
| ONTO | Yoon Ah Oh | Exercise | 2026-02-14 | 3,084 | — | SEC ↗ |
| ONTO | Yoon Ah Oh | Tax Withhold | 2026-02-14 | 1,595 | $346K | SEC ↗ |
| ONTO | Plisinski Michael P | Exercise | 2026-02-14 | 18,445 | — | SEC ↗ |
| ONTO | Plisinski Michael P | Tax Withhold | 2026-02-14 | 12,551 | $2.7M | SEC ↗ |
| ONTO | Plisinski Michael P | Gift | 2025-12-24 | 25,000 | $0 | SEC ↗ |
| ONTO | Ido Dolev | Tax Withhold | 2025-12-02 | 3,183 | $490K | SEC ↗ |
| ONTO | Ramil Yaldaei | Tax Withhold | 2025-10-03 | 594 | $85K | SEC ↗ |
| ONTO | Shirley Chen | Grant | 2025-09-02 | 12,994 | $0 | SEC ↗ |
| ONTO | Brian K Roberts | Grant | 2025-09-02 | 21,175 | $0 | SEC ↗ |