A Form 144 notice of proposed sale was filed on November 9, 2026, disclosing that Lacy Properties, Ltd., a director-affiliated entity of Black Stone Minerals, L.P., intends to sell 646,058 common units on the New York Stock Exchange.

Key Highlights

  • Seller: Lacy Properties, Ltd., identified in the filing as having a "Director" relationship to the issuer, Black Stone Minerals, L.P.
  • Units proposed for sale: 646,058 common units, with an aggregate market value of $8,670,550.60, according to the filing.
  • Units outstanding: The filing reports 212,861,806 common units outstanding.
  • Acquisition date and nature: The units were acquired on May 24, 2019, via a private acquisition from the issuer, paid for in cash on the same date.
  • Approximate sale date: November 9, 2026, through Morgan Stanley Smith Barney LLC Executive Financial Services, located at 1 New York Plaza, 8th Floor, New York, NY 10004.
  • Prior sales: The filing reports nothing to disclose for securities sold during the past three months.

Lacy Properties Proposes Rule 144 Sale of Black Stone Minerals Common Units

According to the Form 144 filing, Lacy Properties, Ltd. notified the Securities and Exchange Commission of a proposed sale of 646,058 common units of Black Stone Minerals, L.P. (NYSE:BSM). The filing lists the relationship of Lacy Properties, Ltd. to the issuer as "Director." The proposed transaction is to be executed through Morgan Stanley Smith Barney LLC Executive Financial Services at 1 New York Plaza, 8th Floor, New York, NY 10004, with an approximate sale date of November 9, 2026.

The filing discloses that the 646,058 units were originally acquired on May 24, 2019, through a private acquisition from the issuer, with full cash payment made on that same date. The aggregate market value of the units proposed for sale is listed as $8,670,550.60. Black Stone Minerals, L.P. is headquartered at 1001 Fannin Street, Suite 2020, Houston, Texas 77022, and its SEC file number is 001-37362. At the time of the notice, the filing states that 212,861,806 common units were outstanding.

The notice was signed by James Walter Whitehead and dated November 9, 2026. The filing contains the standard Rule 144 representation that the person for whose account the securities are to be sold does not know of any material adverse information regarding the current and prospective operations of the issuer that has not been publicly disclosed. No prior sales during the past three months were reported.

What Was Disclosed

Lacy Properties, Ltd., a director-affiliated entity, filed a Form 144 notice proposing to sell 646,058 Black Stone Minerals, L.P. common units with an aggregate market value of $8,670,550.60, originally acquired from the issuer on May 24, 2019, for cash.