DeWalch D Mark
SEC Form 4 insider trading activity
DeWalch D Mark has filed 7 SEC Form 4 filings (8 transaction rows) across 1 company, with disclosures dating back to 2025. 7 of those filings fall inside the rolling window. Most recent filing: Jul 2, 2026.
On the most recent filing, DeWalch D Mark is listed as Director at Black Stone Minerals, L.P. Inside the rolling window, DeWalch D Mark reported 3 open-market purchases totaling $1.5M in BSM and no open-market sales. The largest disclosed transaction in the window is a purchase of 37,650 BSM shares on May 28, 2026, worth $497K.
Companies traded
Other insiders at BSM
Insider Buying
$1.5M
reported purchases (SEC code P)
Insider Selling
$0
reported sales (SEC code S)
Companies
1
in the rolling window
Frequently asked questions
How many SEC Form 4 filings has DeWalch D Mark made?
DeWalch D Mark has filed 7 SEC Form 4 filings (8 transaction rows) across 1 company since 2025.
Which companies does DeWalch D Mark trade?
DeWalch D Mark has filed SEC Form 4 disclosures for 1 company, including BSM.
When was DeWalch D Mark's most recent SEC Form 4 filing?
DeWalch D Mark's most recent SEC Form 4 filing on Tracefour is dated Jul 2, 2026.
What is DeWalch D Mark's total buy and sell value in the current window?
Inside the rolling retention window, DeWalch D Mark bought $1.5M and sold $0 based on SEC Form 4 filings.
What was DeWalch D Mark's largest disclosed transaction?
The largest disclosed transaction in the current window is a purchase of 37,650 BSM shares on 2026-05-28, worth $497K, per SEC Form 4 filings.