14 insiders reported 89 Form 4 transactions for ONTO INNOVATION INC. (ONTO) over the past 18 months (most recent 2026-05-22). Recent activity: Lynch Susan D (Director) Buy 761 shares, SEAMS CHRISTOPHER A (Director) Buy 761 shares, MILLER DAVID BRIAN (Director) Buy 761 shares, SCHWARTZ STEPHEN S (Director) Buy 761 shares, Kelley Stephen Douglas (Director) Buy 761 shares. Source: SEC Form 4.
| Date | Insider | Title | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-05-22 | Lynch Susan D | 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 | SCHWARTZ STEPHEN S | Director | Buy | 761 | $0 |
| 2026-05-22 | Kelley Stephen Douglas | Director | Buy | 761 | $0 |
| 2026-05-22 | Su May | Director | Buy | 761 | $0 |
| 2026-05-18 | YALDAEI RAMIL | Chief Operating Officer | Sell | 218 | $59,246 |
| 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 |
| 2026-03-04 | YALDAEI RAMIL | Chief Operating Officer | Sell | 615 | $127,612 |
| 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 | Plisinski Michael P | Chief Executive Officer | Buy | 14,479 | $0 |
| 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 |
| 2026-03-03 | OH Yoon Ah | SVP, Gen Counsel & Corp Sec | Sell | 267 | $57,643 |
| 2026-03-03 | YALDAEI RAMIL | Chief Operating Officer | Buy | 649 | $0 |
| 2026-03-03 | YALDAEI RAMIL | Chief Operating Officer | Sell | 347 | $74,914 |
| 2026-03-03 | YALDAEI RAMIL | Chief Operating Officer | Sell | 276 | $59,586 |
Source: SEC Form 4 filings · as of 2026-05-22