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| Date | Name | Title | Action | No Shares | Price Per Share |
|---|---|---|---|---|---|
Insider Transactions For ONTO | |||||
| 2026-05-20 | Kelley, Stephen Douglas | Director | Purchased | 761 | $0.00 |
| 2026-05-20 | Seams, Christopher A | Director | Purchased | 761 | $0.00 |
| 2026-05-20 | Lynch, Susan D | Director | Purchased | 761 | $0.00 |
| 2026-05-20 | Su, May | Director | Purchased | 761 | $0.00 |
| 2026-05-20 | Schwartz, Stephen S | Director | Purchased | 761 | $0.00 |
| 2026-05-20 | Miller, David Brian | Director | Purchased | 761 | $0.00 |
| 2026-05-15 | Yaldaei, Ramil | Chief Operating Officer | Sold | 218 | $271.77 |
| 2026-05-15 | Yaldaei, Ramil | Chief Operating Officer | Sold | 625 | $271.77 |
| 2026-05-15 | Oh, Yoon Ah | SVP, Gen Counsel & Corp Sec | Sold | 530 | $271.77 |
| 2026-03-03 | Oh, Yoon Ah | SVP, Gen Counsel & Corp Sec | Sold | 417 | $207.50 |
| 2026-03-03 | Plisinski, Michael P | Director, Chief Executive Officer | Sold | 3742 | $207.50 |
| 2026-03-03 | Yaldaei, Ramil | Chief Operating Officer | Sold | 615 | $207.50 |
| 2026-03-03 | Dolev, Ido | EVP, Prod Solutions Grp | Sold | 819 | $207.50 |
| 2026-03-02 | Roberts, Brian K | Chief Financial Officer | Purchased | 1548 | $0.00 |
| 2026-03-02 | Dolev, Ido | EVP, Prod Solutions Grp | Purchased | 3440 | $0.00 |
| 2026-03-02 | Dolev, Ido | EVP, Prod Solutions Grp | Purchased | 1720 | $0.00 |
| 2026-03-02 | Yaldaei, Ramil | Chief Operating Officer | Purchased | 7683 | $0.00 |
| 2026-03-02 | Yaldaei, Ramil | Chief Operating Officer | Purchased | 1548 | $0.00 |
| 2026-03-02 | Plisinski, Michael P | Director, Chief Executive Officer | Purchased | 14479 | $0.00 |
| 2026-03-02 | Plisinski, Michael P | Director, Chief Executive Officer | Purchased | 7239 | $0.00 |
