MARK K MASON
CIK 1396928 · CEO, President · last filed 2025-12-18
MARK K MASON is a CEO, President who has filed 51 SEC Form 4 insider transactions across 3 companies since 2007. The most recent filing, for MCHB, was dated Dec 18, 2025. Across all open-market trades the lifetime net is −$6.8M, 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.
$3.53M
3
51
-$6.78M
Holdings By Company
Recent Filings
51 filings| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2025-12-18 | MCHB | Mixed | +29,221 | -$263.0K | EDGAR |
| 2025-09-04 | MCHB | Mixed | +27,317 | -$289.4K | EDGAR |
| 2025-01-03 | Mechanics Bancorp (HMST) Delisted | Mixed | +13,277 | -$112.2K | EDGAR |
| 2024-09-04 | Mechanics Bancorp (HMST) Delisted | Sell (S) | −1,075 | -$30.5K | EDGAR |
| 2024-01-03 | Mechanics Bancorp (HMST) Delisted | Mixed | +6,238 | -$53.0K | EDGAR |
| 2023-05-04 | Mechanics Bancorp (HMST) Delisted | Other (J) | −2,500 | $0 | EDGAR |
| 2023-03-30 | Mechanics Bancorp (HMST) Delisted | Mixed | +2,481 | -$30.2K | EDGAR |
| 2023-01-04 | Mechanics Bancorp (HMST) Delisted | Mixed | +3,566 | -$79.1K | EDGAR |
| 2022-12-09 | Mechanics Bancorp (HMST) Delisted | Other (J) | −1,075 | $0 | EDGAR |
| 2022-03-30 | Mechanics Bancorp (HMST) Delisted | Mixed | +4,486 | -$141.4K | EDGAR |