Director James Whitehead filed a Form 4 with the SEC on November 10, 2026, disclosing the sale of common units in Black Stone Minerals, L.P. (NYSE:BSM) on November 9, 2026, completing what the filing describes as a previously disclosed divestment plan.

Key Highlights

  • 646,058 units sold by Lacy Properties Ltd.: Common units representing limited partner interests were disposed of at $13.4207 per unit on November 9, 2026, with zero units remaining held in that entity following the transaction.
  • 25,152 units sold by R Lacy Services Ltd. Retirement Plan: Additional common units were disposed of at the same price of $13.4207, also leaving zero units in that account.
  • Transaction code S: Both sales are coded "S" in the filing, indicating open-market or other sales, and are noted as completing a previously disclosed divestment plan.
  • Remaining beneficial ownership: Following the reported transactions, Whitehead beneficially owns 51,865 units directly, 26,153 units indirectly through a trust, 3,102,146 units indirectly through Crain Energy Ltd., and 253,195 units indirectly through Crain Resources Ltd.
  • Reporting person role: James Whitehead is identified as a Director of Black Stone Minerals, L.P.

Whitehead Completes Disclosed Unit Sales Through Two Indirect Holdings

According to the filing, James Whitehead, a director of Black Stone Minerals, L.P. (NYSE:BSM), disposed of a combined 671,210 common units representing limited partner interests on November 9, 2026, through two indirectly held entities. The filing states that 646,058 units were sold by Lacy Properties Ltd. and 25,152 units were sold by the R Lacy Services Ltd. Retirement Plan, both at a price of $13.4207 per unit. The filing's footnote states: "The sales reported in this Form 4 complete the previously disclosed divestment plan."

Following both dispositions, neither Lacy Properties Ltd. nor the R Lacy Services Ltd. Retirement Plan holds any remaining common units in Black Stone Minerals, L.P., according to the filing. Whitehead retains beneficial ownership through other channels: 51,865 units directly, 26,153 units indirectly through a trust, 3,102,146 units indirectly through Crain Energy Ltd., and 253,195 units indirectly through Crain Resources Ltd.

The Form 4 was signed by Steve Putman as attorney-in-fact for James Whitehead and dated November 10, 2026. No derivative securities transactions were reported in Table II of the filing.

What Was Disclosed

Director James Whitehead disclosed the sale of 671,210 common units in Black Stone Minerals, L.P. on November 9, 2026, through two indirect entities at $13.4207 per unit, with the filing noting these sales complete a previously disclosed divestment plan.