13 insiders reported 55 Form 4 transactions for ONTO INNOVATION INC. (ONTO) over the past 18 months (most recent 2026-09-04). Recent activity: ROBERTS BRIAN K (Chief Financial Officer) Sell 3,239 shares, ROBERTS BRIAN K (Chief Financial Officer) Sell 3,239 shares, Chen Shirley (Senior Vice President of Custo) Sell 1,516 shares, Lynch Susan D (Director) Sell 1,000 shares, Kelley Stephen Douglas (Director) Buy 761 shares. Source: SEC Form 4.
| Date | Insider | Title | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-09-04 | ROBERTS BRIAN K | Chief Financial Officer | Sell | 3,239 | $824,487 |
| 2026-09-04 | ROBERTS BRIAN K | Chief Financial Officer | Sell | 3,239 | $824,487 |
| 2026-09-04 | Chen Shirley | Senior Vice President of Custo | Sell | 1,516 | $385,898 |
| 2026-08-25 | Lynch Susan D | Director | Sell | 1,000 | $302,300 |
| 2026-05-22 | Kelley Stephen Douglas | Director | Buy | 761 | $0 |
| 2026-05-22 | SEAMS CHRISTOPHER A | Director | Buy | 761 | $0 |
| 2026-05-22 | MILLER DAVID BRIAN | Director | Buy | 761 | $0 |
| 2026-05-22 | Su May | Director | Buy | 761 | $0 |
| 2026-05-22 | SCHWARTZ STEPHEN S | Director | Buy | 761 | $0 |
| 2026-05-22 | Lynch Susan D | Director | Buy | 761 | $0 |
| 2026-05-18 | OH Yoon Ah | SVP, Gen Counsel & Corp Sec | Sell | 530 | $144,038 |
| 2026-05-18 | YALDAEI RAMIL | Chief Operating Officer | Sell | 625 | $169,856 |
| 2026-05-18 | YALDAEI RAMIL | Chief Operating Officer | Sell | 218 | $59,246 |
| 2026-03-04 | Plisinski Michael P | Chief Executive Officer | Buy | 14,479 | $0 |
| 2026-03-04 | Plisinski Michael P | Chief Executive Officer | Sell | 3,742 | $776,465 |
| 2026-03-04 | Chen Shirley | SVP Customer Success | Buy | 2,523 | $0 |
| 2026-03-04 | OH Yoon Ah | SVP, Gen Counsel & Corp Sec | Buy | 2,408 | $0 |
| 2026-03-04 | OH Yoon Ah | SVP, Gen Counsel & Corp Sec | Sell | 417 | $86,528 |
| 2026-03-04 | YALDAEI RAMIL | Chief Operating Officer | Buy | 7,683 | $0 |
| 2026-03-04 | YALDAEI RAMIL | Chief Operating Officer | Sell | 615 | $127,612 |
| 2026-03-04 | ROBERTS BRIAN K | Chief Financial Officer | Buy | 3,096 | $0 |
| 2026-03-04 | Dolev Ido | EVP, Prod Solutions Grp | Buy | 3,440 | $0 |
| 2026-03-04 | Dolev Ido | EVP, Prod Solutions Grp | Sell | 819 | $169,942 |
| 2026-03-03 | OH Yoon Ah | SVP, Gen Counsel & Corp Sec | Buy | 724 | $0 |
| 2026-03-03 | OH Yoon Ah | SVP, Gen Counsel & Corp Sec | Sell | 307 | $66,278 |
Source: SEC Form 4 filings · as of 2026-09-04