ONTO · Insider Trading
Onto Innovation Inc.
Every open-market purchase and sale reported by ONTO officers, directors and 10%+ beneficial owners on SEC Form 4, which must be filed within two business days of the transaction. Sales often reflect scheduled 10b5-1 plans or tax withholding rather than a directional view, so read counts alongside the size and the filer.
| Filed | Insider | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-10-01 | David Brian Miller | Director | Sell | −2,000 | −$600.00K |
| 2026-09-04 | Shirley Chen | Senior Vice President of Custo | F | −1,516 | −$385.90K |
| 2026-09-04 | Brian K Roberts | Chief Financial Officer | F | −3,239 | −$824.49K |
| 2026-09-04 | Brian K Roberts | Chief Financial Officer | F | −3,239 | −$824.49K |
| 2026-08-25 | Susan D Lynch | Director | Sell | −1,000 | −$302.30K |
| 2026-05-22 | Stephen Douglas Kelley | Director | A | +761 | — |
| 2026-05-22 | Susan D Lynch | Director | A | +761 | — |
| 2026-05-22 | David Brian Miller | Director | A | +761 | — |
| 2026-05-22 | Stephen S Schwartz | Director | A | +761 | — |
| 2026-05-22 | Christopher A Seams | Director | A | +761 | — |
| 2026-05-22 | May Su | Director | A | +761 | — |
| 2026-05-18 | Yoon Ah OH | SVP, Gen Counsel & Corp Sec | F | −530 | −$144.04K |
| 2026-05-18 | Ramil Yaldaei | Chief Operating Officer | F | −843 | −$229.10K |
| 2026-03-04 | Shirley Chen | SVP Customer Success | A | +2,523 | — |
| 2026-03-04 | Yoon Ah OH | SVP, Gen Counsel & Corp Sec | MIXED | +1,991 | −$86.53K |
| 2026-03-04 | Michael P Plisinski | Chief Executive Officer | MIXED | +10,737 | −$776.47K |
| 2026-03-04 | Ramil Yaldaei | Chief Operating Officer | MIXED | +7,068 | −$127.61K |
| 2026-03-04 | Ido Dolev | EVP, Prod Solutions Grp | MIXED | +2,621 | −$169.94K |
| 2026-03-04 | Brian K Roberts | Chief Financial Officer | A | +3,096 | — |
| 2026-03-03 | Yoon Ah OH | SVP, Gen Counsel & Corp Sec | MIXED | +150 | −$123.92K |
| 2026-03-03 | Michael P Plisinski | Chief Executive Officer | MIXED | +450 | −$895.30K |
| 2026-03-03 | Ramil Yaldaei | Chief Operating Officer | MIXED | +26 | −$134.50K |
| 2026-02-18 | Yoon Ah OH | SVP, Gen Counsel & Corp Sec | MIXED | +1,489 | −$346.48K |
| 2026-02-18 | Michael P Plisinski | Chief Executive Officer | MIXED | +5,894 | −$2.73M |
| 2025-12-29 | Michael P Plisinski | Chief Executive Officer | G | −25,000 | — |
| 2025-12-04 | Ido Dolev | EVP, Prod Solutions Grp | F | −3,183 | −$490.21K |
| 2025-10-06 | Ramil Yaldaei | Chief Operating Officer | F | −594 | −$85.36K |
| 2025-09-03 | Shirley Chen | SVP, Customer Success | A | +12,994 | — |
| 2025-09-03 | Brian K Roberts | Chief Financial Officer | A | +21,175 | — |
| 2025-06-13 | Mark Slicer | Chief Financial Officer | — | — | — |
| 2025-06-04 | Ido Dolev | EVP, Prod Solutions Grp | A | +26,953 | — |
| 2025-05-23 | Stephen Douglas Kelley | Director | A | +2,114 | — |
| 2025-05-23 | Susan D Lynch | Director | A | +2,114 | — |
| 2025-05-23 | David Brian Miller | Director | A | +2,114 | — |
| 2025-05-23 | Stephen S Schwartz | Director | A | +2,114 | — |
| 2025-05-23 | Christopher A Seams | Director | A | +2,114 | — |
| 2025-05-23 | May Su | Director | A | +2,114 | — |
| 2025-05-23 | Leo Berlinghieri | Director | — | — | — |
| 2025-05-23 | Christine A Tsingos | Director | — | — | — |
| 2025-05-19 | Yoon Ah OH | SVP, Gen Counsel & Corp Sec | F | −603 | −$59.12K |
| 2025-05-19 | Ramil Yaldaei | Chief Operating Officer | F | −826 | −$80.98K |
| 2025-05-19 | Mark Slicer | Chief Financial Officer | F | −2,066 | −$205.36K |
| 2025-04-09 | Srinivas Vedula | SVP Customer Success | — | — | — |
| 2025-03-05 | Yoon Ah OH | SVP, Gen Counsel & Corp Sec | A | +2,941 | — |
| 2025-03-05 | Michael P Plisinski | CEO | A | +23,212 | — |
| 2025-03-05 | Mark Slicer | Chief Financial Officer | A | +2,941 | — |
| 2025-03-05 | Srinivas Vedula | SVP, Customer Success | A | +2,574 | — |
| 2025-03-05 | Ramil Yaldaei | Chief Operating Officer | A | +3,769 | — |
| 2025-03-03 | Yoon Ah OH | SVP, Gen Counsel & Corp Sec | F | −304 | −$44.28K |
| 2025-03-03 | Michael P Plisinski | CEO | F | −1,925 | −$280.40K |
| Insider | Role | Shares Held | Value |
|---|---|---|---|
| Michael P Plisinski | Chief Executive Officer | 182,984 | $40.38M |
| Christine A Tsingos | Director | 42,918 | $9.47M |
| Christopher A Seams | Director | 38,513 | $8.50M |
| Ido Dolev | EVP, Prod Solutions Grp | 27,355 | $6.04M |
| Yoon Ah OH | SVP, Gen Counsel & Corp Sec | 21,110 | $4.66M |
| Brian K Roberts | Chief Financial Officer | 21,032 | $4.64M |
| Leo Berlinghieri | Director | 20,210 | $4.46M |
| Srinivas Vedula | SVP Customer Success | 18,730 | $4.13M |
| Ramil Yaldaei | Chief Operating Officer | 17,593 | $3.88M |
| Shirley Chen | Senior Vice President of Custo | 14,001 | $3.09M |
| Mark Slicer | Chief Financial Officer | 13,640 | $3.01M |
| David Brian Miller | Director | 10,692 | $2.36M |
| Robert Fiordalice | Sr. Vice President & GM, MBU | 8,763 | $1.93M |
| May Su | Director | 7,984 | $1.76M |
| Stephen Douglas Kelley | Director | 6,384 | $1.41M |
| Stephen S Schwartz | Director | 3,536 | $780.40K |
| D Mayson Brooks | Vice President & GM, IBU | 3,025 | $667.62K |
| Susan D Lynch | Director | 2,684 | $592.36K |
Form 4 reports a change in beneficial ownership by an officer, director or 10%+ holder, and must be filed within two business days of the transaction — so this is close to real time, unlike the 45-day-lagged 13F institutional data.
Transaction codes matter more than the raw buy/sell count. Code P is an open-market purchase — an insider choosing to buy with their own money, which is the signal most research treats as informative. Code S is a sale, but sales are frequently pre-scheduled under a 10b5-1 plan or cover tax withholding on vesting equity, so a run of sales often says nothing directional. Codes A and M are grants and option exercises rather than open-market decisions.
Full filing history and per-insider positions are on the ONTO quote page; the site-wide leaderboard is on the insider transactions hub.
Market data may be delayed, incomplete, or inaccurate. Not a recommendation to buy, sell, or hold any security. Verify quotes with your broker before trading. See Terms §17.