Showing up to 300 most recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | Value $ | * Price $ | Shares | Shares Owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| Ido Dolev | ONTO | Common Stock | Tax liability | -2.99% | -819 | 26,536 | 03 Mar 2026 | Direct | ||
| Ramil Yaldaei | ONTO | Common Stock | Tax liability | -3.23% | -615 | 18,436 | 03 Mar 2026 | Direct | ||
| Michael P. Plisinski | ONTO | Common Stock | Tax liability | -2.04% | -3,742 | 179,242 | 03 Mar 2026 | Direct | ||
| Yoon Ah Oh | ONTO | Common Stock | Tax liability | -1.89% | -417 | 21,640 | 03 Mar 2026 | Direct | ||
| Brian K. Roberts | ONTO | Common Stock | Award | 14.6% | 3,096 | 24,271 | 02 Mar 2026 | Direct | ||
| Brian K. Roberts | ONTO | Performance Stock Unit | Award | 3,096 | 1,548 | 02 Mar 2026 | Direct | |||
| Ido Dolev | ONTO | Common Stock | Award | 14.4% | 3,440 | 27,355 | 02 Mar 2026 | Direct | ||
| Ido Dolev | ONTO | Performance Stock Unit | Award | 3,440 | 1,720 | 02 Mar 2026 | Direct | |||
| Ramil Yaldaei | ONTO | Common Stock | Award | 67.6% | 7,683 | 19,051 | 02 Mar 2026 | Direct | ||
| Ramil Yaldaei | ONTO | Performance Stock Unit | Award | 3,096 | 1,548 | 02 Mar 2026 | Direct | |||
| Michael P. Plisinski | ONTO | Common Stock | Award | 8.59% | 14,479 | 182,984 | 02 Mar 2026 | Direct | ||
| Michael P. Plisinski | ONTO | Performance Stock Unit | Award | 14,478 | 7,239 | 02 Mar 2026 | Direct | |||
| Yoon Ah Oh | ONTO | Common Stock | Award | 12.3% | 2,408 | 22,057 | 02 Mar 2026 | Direct | ||
| Yoon Ah Oh | ONTO | Performance Stock Unit | Award | 2,408 | 1,204 | 02 Mar 2026 | Direct | |||
| Shirley Chen | ONTO | Common Stock | Award | 19.4% | 2,523 | 15,517 | 02 Mar 2026 | Direct | ||
| Shirley Chen | ONTO | Performance Stock Unit | Award | 2,522 | 1,261 | 02 Mar 2026 | Direct | |||
| Ramil Yaldaei | ONTO | Common Stock | Tax liability | -5.2% | -623 | 11,368 | 01 Mar 2026 | Direct | ||
| Ramil Yaldaei | ONTO | Common Stock | Options Exercise | 5.72% | 649 | 11,991 | 01 Mar 2026 | Direct | ||
| Ramil Yaldaei | ONTO | Performance Stock Unit | Options Exercise | -100% | -844 | 0 | 01 Mar 2026 | Direct | ||
| Michael P. Plisinski | ONTO | Common Stock | Tax liability | -2.4% | -4,147 | 168,505 | 01 Mar 2026 | Direct | ||
| Michael P. Plisinski | ONTO | Common Stock | Options Exercise | 2.74% | 4,597 | 172,652 | 01 Mar 2026 | Direct | ||
| Michael P. Plisinski | ONTO | Performance Stock Unit | Options Exercise | -100% | -5,971 | 0 | 01 Mar 2026 | Direct | ||
| Yoon Ah Oh | ONTO | Common Stock | Tax liability | -2.84% | -574 | 19,649 | 01 Mar 2026 | Direct | ||
| Yoon Ah Oh | ONTO | Common Stock | Options Exercise | 3.71% | 724 | 20,223 | 01 Mar 2026 | Direct | ||
| Yoon Ah Oh | ONTO | Performance Stock Unit | Options Exercise | -100% | -941 | 0 | 01 Mar 2026 | Direct | ||
| Michael P. Plisinski | ONTO | Common Stock | Tax liability | -6.95% | -12,551 | 168,055 | 14 Feb 2026 | Direct | ||
| Michael P. Plisinski | ONTO | Common Stock | Options Exercise | 11.4% | 18,445 | 180,606 | 14 Feb 2026 | Direct | ||
| Michael P. Plisinski | ONTO | Performance Stock Unit | Options Exercise | -100% | -11,824 | 0 | 14 Feb 2026 | Direct | ||
| Yoon Ah Oh | ONTO | Common Stock | Tax liability | -7.56% | -1,595 | 19,499 | 14 Feb 2026 | Direct | ||
| Yoon Ah Oh | ONTO | Common Stock | Options Exercise | 17.1% | 3,084 | 21,094 | 14 Feb 2026 | Direct | ||
| Yoon Ah Oh | ONTO | Performance Stock Unit | Options Exercise | -100% | -1,977 | 0 | 14 Feb 2026 | Direct | ||
| Michael P. Plisinski | ONTO | Common Stock | Gift | -13.4% | -25,000 | 162,161 | 24 Dec 2025 | Direct | ||
| Ido Dolev | ONTO | Common Stock | Tax liability | -11.8% | -3,183 | 23,915 | 02 Dec 2025 | Direct | ||
| Ramil Yaldaei | ONTO | Common Stock | Tax liability | -4.98% | -594 | 11,342 | 03 Oct 2025 | Direct | ||
| Brian K. Roberts | ONTO | Common Stock | Award | 21,175 | 21,175 | 02 Sep 2025 | Direct | |||
| Shirley Chen | ONTO | Common Stock | Award | 12,994 | 12,994 | 02 Sep 2025 | Direct | |||
| Ido Dolev | ONTO | Common Stock | Award | 26,953 | 26,953 | 02 Jun 2025 | Direct | |||
| Ido Dolev | ONTO | Performance Stock Unit | Award | 5,390 | 2,695 | 02 Jun 2025 | Direct | |||
| May Su | ONTO | Common Stock | Award | 41.4% | 2,114 | 7,223 | 21 May 2025 | Direct | ||
| Christopher A. Seams | ONTO | Common Stock | Award | 5.93% | 2,114 | 37,752 | 21 May 2025 | Direct | ||
| Stephen S. Schwartz | ONTO | Common Stock | Award | 319.8% | 2,114 | 2,775 | 21 May 2025 | Direct | ||
| David B. Miller | ONTO | Common Stock | Award | 21.5% | 2,114 | 11,931 | 21 May 2025 | Direct | ||
| Susan D. Lynch | ONTO | Common Stock | Award | 261.3% | 2,114 | 2,923 | 21 May 2025 | Direct | ||
| Stephen D. Kelley | ONTO | Common Stock | Award | 60.2% | 2,114 | 5,623 | 21 May 2025 | Direct | ||
| Mark R. Slicer | ONTO | Common Stock | Tax liability | -13.2% | -2,066 | 13,640 | 17 May 2025 | Direct | ||
| Ramil Yaldaei | ONTO | Common Stock | Tax liability | -6.55% | -826 | 11,791 | 15 May 2025 | Direct | ||
| Yoon Ah Oh | ONTO | Common Stock | Tax liability | -3.24% | -603 | 18,010 | 15 May 2025 | Direct |