Black Stone Minerals (BSM) Exec Chairman Carter Thomas Jr Buys 67,758 Shares

What Happened
Carter Thomas L. Jr., Executive Chairman and Director of Black Stone Minerals, purchased a total of 67,758 common units (shares) in three open-market transactions between May 8 and May 12, 2026, for an aggregate cost of approximately $909,335. The individual transactions were: 23,604 units on 2026-05-08 ($13.32 weighted avg, $314,372), 25,000 units on 2026-05-11 ($13.47 weighted avg, $336,855), and 19,154 units on 2026-05-12 (~$13.48 weighted avg, $258,108). These were purchases (code P), which are often viewed as a more informative/bullish signal than routine sales, though no motive is stated.

Key Details

• Dates & weighted-average prices:
  • 2026-05-08: 23,604 units @ weighted avg $13.32 (total ~$314,372) — prices ranged $13.29–$13.34 (Footnote F1).
  • 2026-05-11: 25,000 units @ weighted avg $13.47 (total ~$336,855) — prices ranged $13.44–$13.48 (Footnote F2).
  • 2026-05-12: 19,154 units @ weighted avg $13.48 (total ~$258,108) — prices ranged $13.42–$13.50 (Footnote F3).
• Total purchased: 67,758 units for ~ $909,335.
• Shares owned after transaction: Not specified in the provided filing.
• Filing timeliness: Form filed on 2026-05-12 covering transactions from 2026-05-08 to 2026-05-12; filing falls within normal Form 4 timing (transactions reported within required business-day window).
• Notes: Footnotes indicate each reported price is a weighted average across multiple executions; the filer offers to provide breakdown of amounts at each price upon request.

Context: These were open-market purchases by the company’s Executive Chairman (not derivative exercises or gifts). Purchases by senior executives can be of interest to retail investors as a direct buy of the company’s units, but filings do not explain the insider’s motivation.