Mark Slicer
CIK 1930126 · Chief Financial Officer · last filed 2025-06-13
Mark Slicer is a Chief Financial Officer who has filed 18 SEC Form 4 insider transactions across 1 company since 2022. The most recent filing, for ONTO, was dated Jun 13, 2025. Across all open-market trades the lifetime net is −$780.0K, making them a net seller over the disclosed history. Current disclosed insider exposure totals $3.5M 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.
$3.50M
1
18
-$780.0K
Holdings By Company
| Symbol | Role | Shares | Price | Disclosed Exposure | Lifetime OM Net | Filings | Latest Filed |
|---|---|---|---|---|---|---|---|
| ONTO | Chief Financial Officer | 13,640 | $256.37 | $3.50M | -$780.0K | 14 | 2025-06-13 |
Recent Filings
18 filings| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2025-06-13 | ONTO | — | — | $0 | EDGAR |
| 2025-05-19 | ONTO | Tax (F) | −2,066 | -$205.4K | EDGAR |
| 2025-03-05 | ONTO | Grant (A) | +2,941 | $0 | EDGAR |
| 2025-03-03 | ONTO | Tax (F) | −336 | -$48.9K | EDGAR |
| 2025-02-19 | ONTO | Mixed | +2,168 | -$423.0K | EDGAR |
| 2024-11-18 | ONTO | Sell (S) | −1,100 | -$176.5K | EDGAR |
| 2024-11-15 | ONTO | Notice (144) | −1,100 | -$176.5K | EDGAR |
| 2024-06-10 | ONTO | Sell (S) | −1,038 | -$227.5K | EDGAR |
| 2024-06-07 | ONTO | Notice (144) | −519 | -$112.7K | EDGAR |
| 2024-06-06 | ONTO | Notice (144) | −519 | -$114.8K | EDGAR |
Notice (144 / 144/A): Form 144 is a notice of intent to sell restricted/control stock under Rule 144, filed before the sale; 144/A is an amendment. Many notices are pre-scheduled under Rule 10b5-1 plans. A Form 4 with code S typically follows within a few days when the planned sale executes; missing follow-up Form 4s suggest the notice was cancelled or modified.