Stephen P Casper
CIK 1296969 · last filed 2025-09-09
Stephen P Casper is a corporate insider who has filed 41 SEC Form 4 insider transactions across 1 company since 2007. The most recent filing shows the insider sold $298.5K of MKTX on Sep 9, 2025. Across all open-market trades the lifetime net is −$3.8M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $6.4M 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.
$6.43M
1
41
-$3.75M
Holdings By Company
| Symbol | Role | Shares | Price | Disclosed Exposure | Lifetime OM Net | Filings | Latest Filed |
|---|---|---|---|---|---|---|---|
| MKTX | Director | 53,193 | $120.89 | $6.43M | -$3.75M | 41 | 2025-09-09 |
Recent Filings
41 filings| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2025-09-09 | MKTX | Sell (S) | −1,600 | -$298.5K | EDGAR |
| 2025-06-05 | MKTX | Grant (A) | +784 | $0 | EDGAR |
| 2024-09-09 | MKTX | Sell (S) | −1,000 | -$259.4K | EDGAR |
| 2024-06-11 | MKTX | Sell (S) | −500 | -$99.7K | EDGAR |
| 2024-06-07 | MKTX | Grant (A) | +781 | $0 | EDGAR |
| 2023-08-29 | MKTX | Gift (G) | −200 | $0 | EDGAR |
| 2023-06-09 | MKTX | Grant (A) | +581 | $0 | EDGAR |
| 2022-06-10 | MKTX | Grant (A) | +586 | $0 | EDGAR |
| 2021-08-03 | MKTX | Grant (A) | +353 | $0 | EDGAR |
| 2021-03-12 | MKTX | Gift (G) | — | $0 | EDGAR |