D. Mark DeWalch Net Worth
William Brown
Updated on March 15, 2026
The estimated Net Worth of D Mark De Walch is at least $4.88 Million dollars as of 26 February 2024. Mr. Walch owns over 3,250 units of Black Stone Minerals L.P stock worth over $4,880,240 and over the last 9 years he sold BSM stock worth over $0. In addition, he makes $0 as Independent Director of General Partner at Black Stone Minerals L.P.
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Mr. DeWalch BSM stock SEC Form 4 insiders trading
D has made over 7 trades of the Black Stone Minerals L.P stock since 2015, according to the Form 4 filled with the SEC. Most recently he bought 3,250 units of BSM stock worth $50,278 on 26 February 2024.
The largest trade he's ever made was buying 44,000 units of Black Stone Minerals L.P stock on 16 November 2023 worth over $762,080. On average, D trades about 4,662 units every 161 days since 2015. As of 26 February 2024 he still owns at least 320,436 units of Black Stone Minerals L.P stock.
You can see the complete history of Mr. Walch stock trades at the bottom of the page.
