ONTO INNOVATION INC. — Insider Transactions
Form 4 filings by directors, officers, and 10%+ shareholders
SEC rules require corporate insiders — including directors, executive officers, and any shareholder owning more than 10% of a company's shares — to report changes in their ownership within two business days of a transaction. These disclosures are filed as Form 4. Open-market purchases (code P) are generally considered the most meaningful signal, as insiders are spending their own money.
| Insider | Title | Type | Shares | Price | Value | Owns After | Date |
|---|---|---|---|---|---|---|---|
| Plisinski Michael P | Chief Executive Officer | Gift | 25,000 | — | — | 162,161 | Dec 24, 2025 |
| Dolev Ido | EVP, Prod Solutions Grp | Tax Withholding | 3,183 | $154.01 | $490,214 | 23,915 | Dec 2, 2025 |
| YALDAEI RAMIL | Chief Operating Officer | Tax Withholding | 594 | $143.71 | $85,364 | 11,342 | Oct 3, 2025 |
| ROBERTS BRIAN K | Chief Financial Officer | Award / Grant | 21,175 | — | — | 21,175 | Sep 2, 2025 |
| Chen Shirley | SVP, Customer Success | Award / Grant | 12,994 | — | — | 12,994 | Sep 2, 2025 |
| Dolev Ido | EVP, Prod Solutions Grp | Award / Grant | 5,391 | — | — | 26,953 | Jun 2, 2025 |
| Su May | — | Award / Grant | 2,114 | — | — | 7,223 | May 21, 2025 |
| SEAMS CHRISTOPHER A | — | Award / Grant | 2,114 | — | — | 37,752 | May 21, 2025 |
| SCHWARTZ STEPHEN S | — | Award / Grant | 2,114 | — | — | 2,775 | May 21, 2025 |
| MILLER DAVID BRIAN | — | Award / Grant | 2,114 | — | — | 11,931 | May 21, 2025 |
| Lynch Susan D | — | Award / Grant | 2,114 | — | — | 2,923 | May 21, 2025 |
| Kelley Stephen Douglas | — | Award / Grant | 2,114 | — | — | 5,623 | May 21, 2025 |
| Slicer Mark | Chief Financial Officer | Tax Withholding | 2,066 | $99.40 | $205,360 | 13,640 | May 17, 2025 |
| YALDAEI RAMIL | Chief Operating Officer | Tax Withholding | 217 | $98.04 | $21,275 | 12,400 | May 15, 2025 |
| OH Yoon Ah | SVP, Gen Counsel & Corp Sec | Tax Withholding | 603 | $98.04 | $59,118 | 18,010 | May 15, 2025 |
| YALDAEI RAMIL | Chief Operating Officer | Award / Grant | 3,769 | — | — | 12,617 | Mar 3, 2025 |
| Vedula Srinivas | SVP, Customer Success | Award / Grant | 2,574 | — | — | 18,730 | Mar 3, 2025 |
| Slicer Mark | Chief Financial Officer | Award / Grant | 2,941 | — | — | 15,706 | Mar 3, 2025 |
| Plisinski Michael P | CEO | Award / Grant | 23,212 | — | — | 187,161 | Mar 3, 2025 |
| OH Yoon Ah | SVP, Gen Counsel & Corp Sec | Award / Grant | 2,941 | — | — | 18,613 | Mar 3, 2025 |
| YALDAEI RAMIL | Chief Operating Officer | Tax Withholding | 305 | $145.66 | $44,426 | 8,848 | Mar 1, 2025 |
| Vedula Srinivas | SVP, Customer Success | Tax Withholding | 199 | $145.66 | $28,986 | 16,156 | Mar 1, 2025 |
| Slicer Mark | Chief Financial Officer | Tax Withholding | 336 | $145.66 | $48,942 | 12,765 | Mar 1, 2025 |
| Plisinski Michael P | CEO | Tax Withholding | 1,925 | $145.66 | $280,396 | 163,949 | Mar 1, 2025 |
| OH Yoon Ah | SVP, Gen Counsel & Corp Sec | Tax Withholding | 304 | $145.66 | $44,281 | 15,672 | Mar 1, 2025 |
| OH Yoon Ah | VP, General Counsel & Corp Sec | Tax Withholding | 1,830 | $176.55 | $323,087 | 16,469 | Feb 14, 2025 |
| Plisinski Michael P | CEO | Tax Withholding | 11,435 | $176.55 | $2,018,849 | 169,686 | Feb 14, 2025 |
| Slicer Mark | Chief Financial Officer | Tax Withholding | 620 | $176.55 | $109,461 | 13,101 | Feb 14, 2025 |
| Vedula Srinivas | SVP, Customer Success | Option Exercise | 2,738 | — | — | 18,210 | Feb 14, 2025 |
| Vedula Srinivas | SVP, Customer Success | Sale | 238 | $169.58 | $40,360 | 15,472 | Feb 13, 2025 |
| Vedula Srinivas | SVP, Customer Success | Tax Withholding | 839 | $183.28 | $153,772 | 14,078 | Feb 10, 2025 |
| OH Yoon Ah | VP, General Counsel & Corp Sec | Tax Withholding | 375 | $183.28 | $68,730 | 12,639 | Feb 10, 2025 |
| Plisinski Michael P | CEO | Tax Withholding | 9,210 | $183.28 | $1,688,009 | 157,471 | Feb 10, 2025 |
| Plisinski Michael P | CEO | Sale | 35,000 | $219.19 | $7,671,650 | 150,492 | Jan 21, 2025 |
| Plisinski Michael P | CEO | Sale | 100 | $212.11 | $21,211 | 185,492 | Jan 16, 2025 |
| Vedula Srinivas | SVP, Customer Success | Sale | 827 | $205.00 | $169,535 | 15,223 | Jan 15, 2025 |
| Plisinski Michael P | CEO | Sale | 18,268 | $200.09 | $3,655,244 | 217,224 | Jan 14, 2025 |
| Slicer Mark | Chief Financial Officer | Sale | 1,100 | $160.41 | $176,451 | 10,933 | Nov 15, 2024 |
| OH Yoon Ah | General Counsel | Tax Withholding | 1,296 | $204.39 | $264,889 | 13,014 | Oct 25, 2024 |
| YALDAEI RAMIL | Chief Operating Officer | Tax Withholding | 592 | $206.55 | $122,278 | 9,148 | Oct 3, 2024 |
| BROOKS D MAYSON | Vice President & GM, IBU | Tax Withholding | 224 | $213.22 | $47,761 | 3,025 | Sep 1, 2024 |
| Vedula Srinivas | SVP, Customer Success | Sale | 1,275 | $207.24 | $264,231 | 16,050 | Aug 30, 2024 |
| SCHWARTZ STEPHEN S | — | Award / Grant | 661 | — | — | 661 | Aug 20, 2024 |
| Vedula Srinivas | SVP, Customer Success | Sale | 1,486 | $213.40 | $317,112 | 17,433 | Jun 10, 2024 |
| Slicer Mark | Chief Financial Officer | Sale | 519 | $217.17 | $112,711 | 12,033 | Jun 6, 2024 |
| TSINGOS CHRISTINE A | — | Award / Grant | 809 | — | — | 42,918 | May 22, 2024 |
| Su May | — | Award / Grant | 809 | — | — | 5,109 | May 22, 2024 |
| SEAMS CHRISTOPHER A | — | Award / Grant | 809 | — | — | 35,638 | May 22, 2024 |
| MILLER DAVID BRIAN | — | Award / Grant | 809 | — | — | 9,817 | May 22, 2024 |
| Lynch Susan D | — | Award / Grant | 809 | — | — | 809 | May 22, 2024 |