D Mark DeWalch
CIK 1638259 · last filed 2026-06-02
D Mark DeWalch is a corporate insider who has filed 34 SEC Form 4 insider transactions across 1 company since 2015. The most recent filing shows the insider bought $985.4K of BSM on Jun 2, 2026. Across all open-market trades the lifetime net is +$3.5M, making them a net buyer over the disclosed history. Current disclosed insider exposure totals $14.3M 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.
$14.34M
1
34
$3.54M
Holdings By Company
| Symbol | Role | Shares | Price | Disclosed Exposure | Lifetime OM Net | Filings | Latest Filed |
|---|---|---|---|---|---|---|---|
| BSM | Director | 1,026,380 | $13.97 | $14.34M | $3.54M | 34 | 2026-06-02 |
Recent Filings
34 filings| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2026-06-02 | BSM | Buy (P) | +72,726 | $985.4K | EDGAR |
| 2026-05-28 | BSM | Buy (P) | +37,650 | $497.3K | EDGAR |
| 2026-04-06 | BSM | Grant (A) | +1,240 | $18.7K | EDGAR |
| 2026-01-15 | BSM | Grant (A) | +14,255 | $0 | EDGAR |
| 2026-01-06 | BSM | Grant (A) | +1,410 | $18.7K | EDGAR |
| 2025-10-07 | BSM | Grant (A) | +1,426 | $18.7K | EDGAR |
| 2025-07-03 | BSM | Grant (A) | +1,433 | $18.7K | EDGAR |
| 2025-04-07 | BSM | Grant (A) | +1,227 | $18.7K | EDGAR |
| 2025-01-15 | BSM | Grant (A) | +13,324 | $0 | EDGAR |
| 2025-01-07 | BSM | Grant (A) | +1,284 | $18.7K | EDGAR |