MARK CAMPBELL WINMILL
CIK 1019264 · President and CEO · last filed 2026-05-15
MARK CAMPBELL WINMILL is a President and CEO who has filed 40 SEC Form 4 insider transactions across 2 companies since 2007. The most recent filing shows the insider bought $21.3K of SELF on May 15, 2026. Across all open-market trades the lifetime net is +$531.3K, making them a net buyer over the disclosed history. Current disclosed insider exposure totals $1.9M 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.
$1.91M
2
40
$531.3K
Holdings By Company
| Symbol | Role | Shares | Price | Disclosed Exposure | Lifetime OM Net | Filings | Latest Filed |
|---|---|---|---|---|---|---|---|
| SELF | President and CEO | 368,582 | $5.17 | $1.91M | $593.8K | 34 | 2026-05-15 |
| BEXIL CORP (BXL) Delisted | 10%+ Owner | 20 | — | — | -$62.5K | 2 | 2007-09-21 |
Recent Filings
40 filings| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2026-05-15 | SELF | Buy (P) | +4,000 | $21.3K | EDGAR |
| 2026-03-25 | SELF | Grant (A) | +25,344 | $129.0K | EDGAR |
| 2025-12-05 | SELF | Buy (P) | +16,400 | $84.0K | EDGAR |
| 2025-05-20 | SELF | Buy (P) | +10,000 | $56.7K | EDGAR |
| 2025-03-26 | SELF | Grant (A) | +25,344 | $119.1K | EDGAR |
| 2024-05-30 | SELF | Buy (P) | +22,899 | $113.6K | EDGAR |
| 2024-03-26 | SELF | Grant (A) | +54,193 | $234.1K | EDGAR |
| 2023-11-17 | SELF | Buy (P) | +7,200 | $34.8K | EDGAR |
| 2023-08-18 | SELF | Buy (P) | +1,000 | $5.1K | EDGAR |
| 2023-05-16 | SELF | Buy (P) | +7,800 | $39.9K | EDGAR |