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D Mark DeWalch

CIK 1638259 · last filed 2026-07-02

D Mark DeWalch is a corporate insider who has filed 35 SEC Form 4 insider transactions across 1 company since 2015. The most recent filing shows the insider was granted $18.7K of BSM on Jul 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 $6.2M 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.

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Disclosed Exposure

$6.23M

Companies

1

Total Filings

35

Lifetime Open-Market Net

$3.54M

Holdings By Company

Latest on-record share count from this person's most recent non-derivative Form 4 transaction in each company. Disclosed exposure = shares × current underlying price.
Symbol Role Shares Price Disclosed Exposure Lifetime OM Net Filings Latest Filed
BSM Director 439,586 $14.18 $6.23M $3.54M 35 2026-07-02

Recent Filings

35 filings
Insider activity across all companies, newest first. Form 4 rows are post-trade confirmations (buys, sells, grants, exercises). Notice (144) rows are pre-trade notices of intent to sell restricted or control stock under Rule 144 — they may not all execute. Compare adjacent dates to see which notices became actual sales.
Filed Symbol Action Net Shares Net $ Link
2026-07-02 BSM Grant (A) +1,342 $18.7K EDGAR
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
Showing 1–10 of 35
Page 1 of 4
Form 4 codes: P = open-market purchase · S = open-market sale · A = grant/award · M = option exercise · F = tax withholding at vest · G = bona-fide gift · D = disposition to issuer · J = other (see filing footnote). Only P / S codes carry directional signal.
Notice (144 / 144/A): Form 144 is a notice of intent to sell restricted/control stock under Rule 144, filed before the sale; 144/A is an amendment. Many notices are pre-scheduled under Rule 10b5-1 plans. A Form 4 with code S typically follows within a few days when the planned sale executes; missing follow-up Form 4s suggest the notice was cancelled or modified.