| Insider | Role | Shares | Value | Buys | Sells |
|---|---|---|---|---|---|
| Date | Ticker | Insider | Role | Type | Shares | Price | Value | Chg% | SEC |
|---|---|---|---|---|---|---|---|---|---|
| Insider | Role | Shares | Value | Buys | Sells |
|---|---|---|---|---|---|
| Date | Ticker | Insider | Role | Type | Shares | Price | Value | Chg% | SEC |
|---|---|---|---|---|---|---|---|---|---|
Chief Executive Officer | CEO
1 company
Michael P Plisinski is Chief Executive Officer at ONTO. Michael P Plisinski's net worth is not public. Form 4 filings only show shares in the companies where this person is an insider; those holdings are worth an estimated $36.3M at current prices.
Our model assigns Michael P Plisinski a middling insider score of 56/100, based on 9 past trades. Over a 12-month horizon, 55.6% of those trades were profitable, with an average 12-month return of -7.5%.
The ONTO filings lean toward selling, a net 266,000 shares.
Michael P Plisinski has 31 Form 4 filings on record from October 2019 to March 2026, all as Chief Executive Officer at Onto Innovation (ONTO), 2019–2026.
The 89 reported transactions were 29 tax withholdings, 23 open-market sales, 12 option or other derivative awards and 9 option exercises, plus smaller numbers of other types.
Counted by filing, the open-market trades come to no purchases and 9 sales worth about $34.0M.
The largest open-market sale was 35,000 shares of ONTO at an average $219.19 on January 21, 2025, about $7.7M. Twelve months later ONTO was down 1%.
All 5 sales since April 2023 were made under a Rule 10b5-1 trading plan, set up in advance.
| Date | Ticker | Role | Type | Shares | Price | Value | Chg% | 3M | 12M | SEC |
|---|---|---|---|---|---|---|---|---|---|---|
| Jan 21, 2025 | ONTO Onto Innovation Inc. | CEO | Sell10b5-1 | 35,000 | $219.19 | $7,671,650.00 | -18.9% | -48.9% | -1.4% | |
| Jan 16, 2025 | ONTO Onto Innovation Inc. | CEO | Sell10b5-1 | 30,000 | $211.24 | $6,337,287.00 | -13.9% | -46.1% | +3.4% | |
| Jan 14, 2025 | ONTO Onto Innovation Inc. | CEO | Sell10b5-1 | 20,000 | $200.19 | $4,003,826.44 | -8.5% | -40.3% | +0.0% | |
| Mar 20, 2024 | ONTO Onto Innovation Inc. | CEO | Sell10b5-1 | 40,000 | $175.48 | $7,019,129.00 | -14.5% | +28.5% | -22.9% | |
| Aug 21, 2023 | ONTO Onto Innovation Inc. | CEO | Sell10b5-1 | 31,000 | $112.85 | $3,498,438.87 | -11.0% | +19.4% | +84.1% | |
| Aug 6, 2021 | ONTO Onto Innovation Inc. | Chief Executive Officer | Sell | 29,592 | $75.34 | $2,229,461.28 | -12.0% | +13.3% | +15.8% | |
| Jun 16, 2021 | ONTO Onto Innovation Inc. | Chief Executive Officer | Sell | 3,500 | $75.25 | $263,358.00 | -1.4% | +8.5% | -7.0% | |
| Jun 14, 2021 | ONTO Onto Innovation Inc. | Chief Executive Officer | Sell | 6,908 | $75.30 | $520,172.40 | -2.7% | +3.6% | -3.3% | |
| Nov 4, 2020 | ONTO Onto Innovation Inc. | Chief Executive Officer | Sell | 70,000 | $35.26 | $2,468,464.52 | -22.1% | - | - |