Thomas J. Gunderson
CIK 1708144 · last filed 2026-05-22
Thomas J. Gunderson is a corporate insider who has filed 21 SEC Form 4 insider transactions across 2 companies since 2018. The most recent filing, for TMDX, was dated May 22, 2026. Across all open-market trades the lifetime net is −$1.4M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $4.6M 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.
$4.55M
2
21
-$1.38M
Holdings By Company
Recent Filings
21 filings| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2026-05-22 | TMDX | Grant (A) | +2,922 | $0 | EDGAR |
| 2026-05-21 | MMSI | Exer (M) | +21,250 | $1.11M | EDGAR |
| 2026-05-19 | MMSI | Grant (A) | +3,457 | $0 | EDGAR |
| 2025-05-23 | TMDX | Grant (A) | +2,134 | $0 | EDGAR |
| 2025-05-19 | MMSI | Grant (A) | +2,152 | $0 | EDGAR |
| 2025-03-03 | MMSI | Mixed | +12,194 | -$17.5K | EDGAR |
| 2024-05-28 | TMDX | Grant (A) | +732 | $0 | EDGAR |
| 2024-05-20 | MMSI | Grant (A) | +2,431 | $0 | EDGAR |
| 2024-03-05 | MMSI | Mixed | +6,843 | -$520.5K | EDGAR |
| 2023-05-30 | TMDX | Grant (A) | +1,193 | $0 | EDGAR |