Michael P Plisinski
CIK 1325550 · Chief Executive Officer · last filed 2026-03-04
Michael P Plisinski is a Chief Executive Officer who has filed 89 SEC Form 4 insider transactions across 2 companies since 2007. The most recent filing, for ONTO, was dated Mar 4, 2026. Across all open-market trades the lifetime net is −$34.7M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $59.3M across reported positions.
"Disclosed insider exposure" sums this person's most-recently-reported share counts across each company they're an insider in, multiplied by the current underlying price. It is not net worth — it misses retail holdings, private investments, real estate, index funds, and any company where the person isn't an SEC-reporting insider. For informational purposes only.
$59.26M
2
89
-$34.70M
Holdings By Company
| Symbol | Role | Shares | Price | Disclosed Exposure | Lifetime OM Net | Filings | Latest Filed |
|---|---|---|---|---|---|---|---|
| ONTO | Chief Executive Officer | 182,984 | $323.88 | $59.26M | -$34.01M | 33 | 2026-03-04 |
| RUDOLPH TECHNOLOGIES INC (RTEC) Delisted | Chief Executive Officer | 336,513 | — | — | -$692.3K | 55 | 2019-10-02 |
Recent Filings
89 filings| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2026-03-04 | ONTO | Mixed | +10,737 | -$776.5K | EDGAR |
| 2026-03-03 | ONTO | Mixed | +450 | -$895.3K | EDGAR |
| 2026-02-18 | ONTO | Mixed | +5,894 | -$2.73M | EDGAR |
| 2025-12-29 | ONTO | Gift (G) | −25,000 | $0 | EDGAR |
| 2025-03-05 | ONTO | Grant (A) | +23,212 | $0 | EDGAR |
| 2025-03-03 | ONTO | Tax (F) | −1,925 | -$280.4K | EDGAR |
| 2025-02-19 | ONTO | Mixed | +8,403 | -$2.69M | EDGAR |
| 2025-02-12 | ONTO | Mixed | +6,979 | -$2.21M | EDGAR |
| 2025-01-22 | ONTO | Sell (S) | −35,000 | -$7.67M | EDGAR |
| 2025-01-21 | ONTO | Sell (S) | −30,000 | -$6.34M | EDGAR |