R. Lacy Services, Ltd. Ret. Plan, a director-affiliated entity of Black Stone Minerals, L.P., filed a Form 144 notice of proposed sale of securities on November 9, 2026, disclosing plans to sell 25,152 common units of the issuer on the New York Stock Exchange.

Key Highlights

  • Proposed seller: R. Lacy Services, Ltd. Ret. Plan, listed as having a Director relationship to Black Stone Minerals, L.P.
  • Units to be sold: 25,152 common units, with an aggregate market value of $337,557.45, according to the filing.
  • Approximate date of sale: November 9, 2026, through Morgan Stanley Smith Barney LLC Executive Financial Services.
  • Total units outstanding: 212,861,806 common units, as reported in the filing.
  • Acquisition history: The securities to be sold were acquired in two transactions: 14,263 units acquired May 24, 2019, and 10,889 units acquired May 6, 2015, both as private acquisitions from the issuer for cash.
  • No sales in past 3 months: The filing reports nothing to report under securities sold during the past three months.

Black Stone Minerals Director-Affiliated Plan Files Rule 144 Notice for 25,152 Common Units

According to the Form 144 filed with the U.S. Securities and Exchange Commission, R. Lacy Services, Ltd. Ret. Plan has provided notice of a proposed sale of 25,152 common units of Black Stone Minerals, L.P. (NYSE:BSM). The filing lists the relationship to the issuer as Director, and the aggregate market value of the units to be sold is stated as $337,557.45. The proposed sale is to be executed through Morgan Stanley Smith Barney LLC Executive Financial Services, located at 1 New York Plaza, 8th Floor, New York, NY 10004.

The filing discloses that the units proposed for sale were acquired in two separate transactions. The first involved 14,263 common units acquired on May 24, 2019, through a private acquisition from the issuer, paid for in cash. The second involved 10,889 common units acquired on May 6, 2015, also through a private acquisition from the issuer, paid for in cash. The filing identifies the issuer as the person from whom both lots were acquired.

As of the notice date of November 9, 2026, the filing reports that there were 212,861,806 common units outstanding. The filing states that nothing is to be reported with respect to securities sold during the past three months by the person for whose account the sale is proposed. The notice was signed by James Walter Whitehead. Black Stone Minerals, L.P. is headquartered at 1001 Fannin Street, Suite 2020, Houston, Texas 77022, with SEC File Number 001-37362.

What Was Disclosed

A Form 144 notice was filed on November 9, 2026, disclosing a proposed sale of 25,152 common units of Black Stone Minerals, L.P. by R. Lacy Services, Ltd. Ret. Plan, a director-affiliated entity, with an aggregate market value of $337,557.45.