As of March 23, 2026, Onto Innovation's top three insider holders are Michael P Plisinski (Chief Executive Officer, 179.24K shares), Edward J Jr Brown (Director, 44.74K shares), Christine A Tsingos (Director, 42.92K shares).
| Holder | Position | Shares (Direct) | Shares (Indirect) | Report Date |
|---|---|---|---|---|
| Michael P Plisinski | Chief Executive Officer | 179,242 | 0 | 04 Mar, 2026 |
| Edward J Jr Brown | 44,739 | 0 | 12 May, 2021 | |
| Christine A Tsingos | 42,918 | 0 | 23 May, 2024 | |
| Christopher A Seams | 37,752 | 0 | 23 May, 2025 | |
| Rollin Kocher | 33,896 | 0 | 08 Sep, 2021 | |
| Rodney Smedt | 31,998 | 0 | 02 Jun, 2021 | |
| Ido Dolev | Evp, Prod Solutions Grp | 26,536 | 0 | 04 Mar, 2026 |
| Brian K Roberts | Chief Financial Officer | 24,271 | 0 | 04 Mar, 2026 |
| Steven R Roth | Sr Vp Cfo | 23,043 | 0 | 13 Feb, 2022 |
| Yoon Ah Oh | Svp, Gen Counsel Corp Sec | 21,640 | 0 | 04 Mar, 2026 |
| Kevin Heidrich | 20,470 | 0 | 15 Jun, 2021 | |
| Leo Berlinghieri | 20,210 | 0 | 23 May, 2024 | |
| Srinivas Vedula | Svp, Customer Success | 18,730 | 0 | 05 Mar, 2025 |
| Ramil Yaldaei | Chief Operating Officer | 18,436 | 0 | 04 Mar, 2026 |
| Shirley Chen | Svp Customer Success | 15,517 | 0 | 04 Mar, 2026 |
| Mark Slicer | Chief Financial Officer | 13,640 | 0 | 19 May, 2025 |
| David Brian Miller | 11,931 | 0 | 23 May, 2025 | |
| Ju Jin | Svp Gm, Ibu | 10,254 | 0 | 16 Jun, 2023 |
| Robert Fiordalice | Svp Gm, Metrology Bu | 8,763 | 0 | 05 Mar, 2024 |
| James Harlow | Chief Operating Officer | 8,586 | 0 | 15 Feb, 2023 |
| May Su | 7,223 | 0 | 23 May, 2025 | |
| Stephen Douglas Kelley | 5,623 | 0 | 23 May, 2025 | |
| Dean Iacopetti | 5,338 | 0 | 28 Jun, 2021 | |
| Karen M Rogge | 5,150 | 0 | 11 May, 2023 | |
| Bruce C Rhine | 3,500 | 0 | 17 Feb, 2022 | |
| D Mayson Brooks | Vice President Gm, Ibu | 3,025 | 0 | 04 Sep, 2024 |
| Susan D Lynch | 2,923 | 0 | 23 May, 2025 | |
| Stephen S Schwartz | 2,775 | 0 | 23 May, 2025 |
* Please note that the shares above only reflect shares from the fund portfolio and the institutional portfolio. Shares from the personal portfolio are excluded from this Institutional Ownership Page. See these insiders' latest transactions here on Insider Page.
| Transaction Date | Insider Name | Security Class | Transaction Type | Shares Traded | Price | Shares Remaining | Ownership | Code |
|---|---|---|---|---|---|---|---|---|
| 02 Mar, 2026 | Ido Dolev | Common Stock | A | 3,440 | $0.00 | 27,355 | D | A |
| 02 Mar, 2026 | Yoon Ah Oh | Common Stock | A | 2,408 | $0.00 | 22,057 | D | A |
| 02 Mar, 2026 | Ramil Yaldaei | Common Stock | A | 7,683 | $0.00 | 19,051 | D | A |
| 02 Mar, 2026 | Brian K Roberts | Common Stock | A | 3,096 | $0.00 | 24,271 | D | A |
| 02 Mar, 2026 | Shirley Chen | Common Stock | A | 2,523 | $0.00 | 15,517 | D | A |
| 02 Mar, 2026 | Michael P Plisinski | Common Stock | A | 14,479 | $0.00 | 182,984 | D | A |
| 02 Mar, 2026 | Shirley Chen | Performance Stock Unit | A | 1,261 | $0.00 | 1,261 | D | A |
| 03 Mar, 2026 | Ido Dolev | Common Stock | D | 819 | $207.50 | 26,536 | D | F |
| 03 Mar, 2026 | Michael P Plisinski | Common Stock | D | 3,742 | $207.50 | 179,242 | D | F |
| 03 Mar, 2026 | Ramil Yaldaei | Common Stock | D | 615 | $207.50 | 18,436 | D | F |
| 02 Mar, 2026 | Brian K Roberts | Performance Stock Unit | A | 1,548 | $0.00 | 1,548 | D | A |
| 03 Mar, 2026 | Yoon Ah Oh | Common Stock | D | 417 | $207.50 | 21,640 | D | F |
| 02 Mar, 2026 | Ramil Yaldaei | Performance Stock Unit | A | 1,548 | $0.00 | 1,548 | D | A |
| 02 Mar, 2026 | Michael P Plisinski | Performance Stock Unit | A | 7,239 | $0.00 | 7,239 | D | A |
| 02 Mar, 2026 | Ido Dolev | Performance Stock Unit | A | 1,720 | $0.00 | 1,720 | D | A |
| 02 Mar, 2026 | Brian K Roberts | Performance Stock Unit | A | 1,548 | $0.00 | 1,548 | D | A |
| 02 Mar, 2026 | Shirley Chen | Performance Stock Unit | A | 1,261 | $0.00 | 1,261 | D | A |
| 02 Mar, 2026 | Yoon Ah Oh | Performance Stock Unit | A | 1,204 | $0.00 | 1,204 | D | A |
| 02 Mar, 2026 | Yoon Ah Oh | Performance Stock Unit | A | 1,204 | $0.00 | 1,204 | D | A |
| 02 Mar, 2026 | Michael P Plisinski | Performance Stock Unit | A | 7,239 | $0.00 | 7,239 | D | A |