D Mark Dewalch

Director Mark Dewalch bought 72.7K shares for $985.4K at BSM in two tranches (May 29–June 1), raising holdings 13.0%

Mark Dewalch purchased 72,726 shares across two separate transactions at a blended average price of $13.55, investing $985,353.67 total and increasing his stake from 558,522 to 631,248 shares (+13.0%). The transactions occurred at $13.48 on 2026-05-29 and $13.62 on 2026-06-01, prices that sit near the current market price of $13.60 and well within the 52-week range ($11.78–$15.49). Dewalch's cross-ticker track record shows a 100% win rate on prior buys at the 90-day mark with an average 90-day return of +2.5%, and his same-ticker history at BSM demonstrates consistent timing: 2 of 2 prior measurable buys posted positive 90-day returns (+0.1% and +3.6%). This filing reflects a material increase in an insider's commitment to a company generating $59.4M in quarterly revenue, $13.3M in net income, and sustained 8.4% annual revenue growth.

Director Mark Dewalch buys 37,650 BSM shares at $13.21; holdings now 431,495 shares post-transaction

Director Mark Dewalch purchased 37,650 shares at $13.21, increasing his stake to 431,495 shares (431.5K shares) post-transaction, a net change of +9.6% versus pre-transaction holdings. His prior open-market buy activity shows an across-ticker track record averaging +2.5% over 90 days with a 100.00% win rate, and at this specific ticker (BSM) his 2 prior buys with measurable outcomes achieved +0.1% and +3.6% returns at the 90-day mark. The current price of $13.31 sits -5.7% over 30 days and -11.8% over 90 days, placing the stock -14.1% from its 52-week high of $15.49. Fundamentals show quarterly revenue of $59,359,000.00 and net income of $13,272,000.00, with annual revenue growth of +8.4%.

Director DeWalch buys 34.2K shares of BSM at $14.62; stock down 7.0% in 30 days and -10.2% in 90 days from purchase.

DeWalch D Mark, a director at Black Stone Minerals, L.P., purchased 34,200 shares at $14.62 on 2024-08-15, increasing his holdings by 10.6% to 357,005 shares total. The stock has traded at $14.57 currently, down 7.0% over the past 30 days and -10.2% over 90 days from the purchase date, positioning the stock 20.6% below its 52-week high of $18.36. Across his open-market history at this ticker, DeWalch's prior three purchases have shown mixed timing: one resulted in a positive 90-day return (+2.4% to +1.4%), while two showed declines (-7.3% to -12.4% and -5.4% to -7.3%), yielding a 33.33% win rate at this ticker over the 90-day horizon. The current context shows the company with $68.3M in net income on $109.6M quarterly revenue, but annual revenue has contracted 10.8% year-over-year, framing this acquisition against a backdrop of declining top-line momentum despite strong profitability in the latest quarter.