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D Mark Dewalch is Director at Black Stone Minerals, L.P.. OQRO lists 1 transaction filed with the SEC under this name, the latest on Oct 6, 2026, each linked to the official Form 4.
Director
Disclosures on record
1
Companies involved
1
D Mark Dewalch bought shares on the open market in 2015, 2018, 2019, 2023 and 2024, and has not bought since 2024.
D Mark Dewalch reported 11 open-market purchases and 0 sales since 2015; purchases in 5 different years, most recently 2024.
| Year | Bought | Sold |
|---|---|---|
| 2024 | $550K2×2 trades | — |
| 2023 | $1.3M4×4 trades | — |
| 2019 | $88K1×1 trade | — |
| 2018 | $20K1×1 trade | — |
| 2015 | $71K3×3 trades | — |
Open-market purchases (code P) and sales (code S) on Forms 4 and 5. Up to Sep 2024 from the SEC's Insider Transactions Data Sets; since Oct 2024 from each filing as it is published. A trade filed twice (an amendment) counts once. Dollar totals use the price the filer reported; lines with no price count as trades without a value.
Oct 2, 20261,309disclosed Oct 6
DetailsOfficial recordAs of the latest filing on , D Mark Dewalch reported holding 434,146 shares of Black Stone Minerals, L.P. (BSM), worth about $6.17M at the last close of $14 (Nov 13, 2026).
| Company | Shares reported | How held | Last close | Value at last close | Reported |
|---|---|---|---|---|---|
| Black Stone Minerals, L.P. BSM | 434,146 | 434K direct | $14 | $6.17M | Oct 2, 2026 |
Is this D Mark Dewalch’s net worth? No. A Form 4 reports the shares an insider owns in one company after each transaction, directly or through trusts and entities. It says nothing about cash, other investments, property or debt, options not yet exercised are not counted here, and a holding reported some time ago may have changed without a new filing. The value is shares times the last stored close, not a price anyone received. Sources: the filings listed below, each linked to EDGAR. Compare with the biggest insider stakes.
D Mark Dewalch reported 11 open-market purchases and 0 sales here, 2015 to 2024.
Closing prices and the companies' last annual figures; a − or + is a fact of the close, not a forecast.
On the latest SEC Form 4, dated Oct 2, 2026, D Mark Dewalch reported holding 434,146 shares of Black Stone Minerals, L.P. (BSM). At the last close of $14 on Nov 13, 2026, that is about $6.17M. This is the stake disclosed in filings, not a net worth.
D Mark Dewalch bought shares on the open market in 2015, 2018, 2019, 2023 and 2024, and has not bought since 2024.
In SEC filings since 2015: the latest open-market purchase is from 2024; no open-market sale is on record.
Black Stone Minerals, L.P. (BSM), from 2015 to 2024: 11 purchases and 0 sales.