Black Stone Minerals, L.P. (BSM) — Insider Trading

AI-Powered SEC Filing Analysis

Latest Insider Trading Filed: 2026-05-14

Key Insights

Executive Chairman Thomas L. Carter Jr. purchased 1,120 common units at $13.4999 on 05/13/2026, representing a direct open market acquisition that signals insider confidence in BSM's current valuation.
Carter maintains substantial beneficial ownership across multiple entities totaling approximately 12.7 million units (direct and indirect), with the largest holdings through Carter2221, Ltd. (11.5M units), demonstrating significant long-term commitment to the partnership.
The filing shows diversified indirect ownership structure through family trusts (Fowler Thomas Carter 1995 Trust, Georgia Elizabeth Carter 1995 Trust, Molly Leachman Carter 1995 Trust, Katherine Ross Carter 1995 Trust) and spouse holdings, indicating estate planning and wealth distribution strategy.

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Earlier Insider Trading filings

Filed: 2026-05-13

Director Ashley J. Longmaid sold 11,128 common units on 05/12/2026 at a weighted average price of $13.45, representing a significant insider sale that reduces her direct ownership position.
The sale was executed across multiple transactions at prices ranging from $13.41 to $13.48, suggesting a deliberate distribution rather than a single transaction, which could indicate planned liquidity management.
Following the transaction, Longmaid retains 137,335 common units in direct ownership, demonstrating continued meaningful stake in BSM despite the sale, though the insider sale activity may signal reduced confidence or alternative capital allocation priorities.
The filing shows Longmaid's position as a Director and 10% owner, making this insider transaction noteworthy for tracking management confidence levels and potential changes in ownership structure.

Filed: 2026-05-12

Executive Chairman Thomas L. Carter Jr. made three separate open market purchases totaling 67,758 common units over a 4-day period (May 8-12, 2026), increasing his beneficial ownership to 3,681,604 units, signaling confidence in the company's value.
The purchases were made at relatively consistent price points ($13.32-$13.48 range), suggesting deliberate accumulation rather than reactive trading, with each transaction executed at weighted average prices within narrow ranges.
Carter's total investment of approximately $902,000 across these three transactions represents a meaningful personal commitment, particularly notable given his dual role as Director and Executive Chairman with significant existing shareholdings.

Filed: 2026-05-06

SVP, General Counsel, and Secretary Luke Stevens sold 29,386 common units on May 5, 2026, at a weighted average price of $13.748, representing a significant reduction in his direct ownership position from approximately 732,031 units to 702,645 units.
The sale was executed pursuant to a Rule 10b5-1 trading plan adopted on December 4, 2025, indicating this was a pre-planned, systematic divestment rather than an opportunistic or reactive transaction, which reduces the negative signaling typically associated with insider selling.
The selling price range of $13.56 to $14.11 suggests the officer sold into relative strength, and the modest sale size (approximately 4% of his holdings) indicates maintained confidence in the company despite the divestment.

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Important Information

AI-generated analysis is for informational purposes only. Always read original SEC filings and consult with qualified professionals before making investment decisions.