OH Yoon Ah (CIK 1889970) reported 18 SEC Form 4 insider transactions across 1 companies over the past 18 months (most recent 2026-05-18). Recent activity: Sell ONTO (530 shares), Buy ONTO (2,408 shares), Sell ONTO (417 shares), Buy ONTO (724 shares), Sell ONTO (307 shares). Source: SEC Form 4.
| Date | Company | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-05-18 | ONTO INNOVATION INC. (ONTO) | SVP, Gen Counsel & Corp Sec | Sell | 530 | $144,038 |
| 2026-03-04 | ONTO INNOVATION INC. (ONTO) | SVP, Gen Counsel & Corp Sec | Buy | 2,408 | $0 |
| 2026-03-04 | ONTO INNOVATION INC. (ONTO) | SVP, Gen Counsel & Corp Sec | Sell | 417 | $86,528 |
| 2026-03-03 | ONTO INNOVATION INC. (ONTO) | SVP, Gen Counsel & Corp Sec | Buy | 724 | $0 |
| 2026-03-03 | ONTO INNOVATION INC. (ONTO) | SVP, Gen Counsel & Corp Sec | Sell | 307 | $66,278 |
| 2026-03-03 | ONTO INNOVATION INC. (ONTO) | SVP, Gen Counsel & Corp Sec | Sell | 267 | $57,643 |
| 2026-02-18 | ONTO INNOVATION INC. (ONTO) | SVP, Gen Counsel & Corp Sec | Buy | 3,084 | $0 |
| 2026-02-18 | ONTO INNOVATION INC. (ONTO) | SVP, Gen Counsel & Corp Sec | Sell | 1,094 | $237,650 |
| 2026-02-18 | ONTO INNOVATION INC. (ONTO) | SVP, Gen Counsel & Corp Sec | Sell | 501 | $108,832 |
| 2025-05-19 | ONTO INNOVATION INC. (ONTO) | SVP, Gen Counsel & Corp Sec | Sell | 603 | $59,118 |
| 2025-03-05 | ONTO INNOVATION INC. (ONTO) | SVP, Gen Counsel & Corp Sec | Buy | 2,941 | $0 |
| 2025-03-03 | ONTO INNOVATION INC. (ONTO) | SVP, Gen Counsel & Corp Sec | Sell | 304 | $44,281 |
| 2025-02-19 | ONTO INNOVATION INC. (ONTO) | VP, General Counsel & Corp Sec | Buy | 3,956 | $0 |
| 2025-02-19 | ONTO INNOVATION INC. (ONTO) | VP, General Counsel & Corp Sec | Sell | 1,830 | $323,086 |
| 2025-02-19 | ONTO INNOVATION INC. (ONTO) | VP, General Counsel & Corp Sec | Sell | 493 | $87,039 |
| 2025-02-12 | ONTO INNOVATION INC. (ONTO) | VP, General Counsel & Corp Sec | Sell | 375 | $68,730 |
| 2025-02-12 | ONTO INNOVATION INC. (ONTO) | VP, General Counsel & Corp Sec | Sell | 1,016 | $186,212 |
| 2025-02-12 | ONTO INNOVATION INC. (ONTO) | VP, General Counsel & Corp Sec | Buy | 2,720 | $0 |
Source: SEC Form 4 filings · as of 2026-05-18