Mark N. Tompkins
CIK 1455971 · last filed 2026-05-27
Mark N. Tompkins is a corporate insider who has filed 62 SEC Form 4 insider transactions across 3 companies since 2017. Across all open-market trades the lifetime net is −$23.8M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $94.8M 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.
$94.77M
3
62
-$23.81M
Holdings By Company
Recent Filings
62 filings| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2026-05-27 | — | Other (J) | −5,125,000 | $0 | |
| 2026-02-05 | ALMU | Sell (S) | −34,500 | -$507.7K | EDGAR |
| 2026-02-02 | ALMU | Sell (S) | −95,000 | -$1.53M | EDGAR |
| 2026-01-22 | ALMU | Sell (S) | −105,000 | -$2.01M | EDGAR |
| 2025-12-29 | ALMU | Sell (S) | −60,000 | -$997.4K | EDGAR |
| 2025-12-22 | ALMU | Sell (S) | −85,000 | -$1.25M | EDGAR |
| 2025-12-11 | ALMU | Sell (S) | −50,000 | -$854.3K | EDGAR |
| 2025-12-09 | ALMU | Sell (S) | −100,000 | -$1.61M | EDGAR |
| 2025-10-21 | ALMU | Sell (S) | −77,500 | -$1.29M | EDGAR |
| 2025-10-17 | ALMU | Sell (S) | −65,000 | -$1.31M | EDGAR |