BSM

EX-99.1

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EX-99.1

Document

Exhibit 99.1

News

For Immediate Release

Black Stone Minerals, L.P. Reports First Quarter Results

HOUSTON - (BUSINESS WIRE) - Black Stone Minerals, L.P. (NYSE: BSM) ("Black Stone Minerals," "Black Stone," or "the Partnership") today announces its financial and operating results for the first quarter of 2026.

Financial and Operational Highlights

•Mineral and royalty production for the first quarter of 2026 equaled 35.9 MBoe/d, an increase of 16% from the prior quarter; total production, including working-interest volumes, was 37.0 MBoe/d for the quarter.

•Net income for the first quarter was $13.3 million, and Adjusted EBITDA for the quarter totaled $87.0 million.

•Distributable cash flow was $76.5 million for the first quarter.

•Black Stone announced a distribution of $0.30 per unit with respect to the first quarter of 2026. Distribution coverage for all units was 1.20x.

•Total debt at the end of the first quarter was $187.0 million; as of May 1, 2026, total debt was $164.0 million with approximately $10.0 million of cash on hand.

Management Commentary

“During the first quarter, we continued to execute across our commercial initiatives, building on the momentum established in 2025,” said Fowler Carter, Co-CEO and President of Black Stone Minerals. “Since inception, we have deployed over $250 million through our mineral acquisition program to enhance our long-term development position in the expanding Haynesville and Bossier play. In the Shelby Trough, operators under our development agreements continue to progress activity across multiple programs. Throughout the broader portfolio we had another strong quarter of leasing activity and remain encouraged by continued high-interest development in the Permian. As activity continues to ramp up across our core areas, we remain focused on execution and positioning the portfolio for sustained production and cash flow growth over time.”

Taylor DeWalch, Co-CEO and President added “We delivered a strong first quarter, with production exceeding expectations. Production outperformance was driven primarily by increased natural gas activity in the Louisiana Haynesville and Shelby Trough and strong oil production in the Permian. Results reflected significant commodity price volatility, with natural gas realizations impacted by February regional pricing dislocations from Winter Storm Fern and oil pricing in March reflecting the onset of geopolitical uncertainty. While we are in the early innings of initiating development under multiple agreements in the Haynesville and Bossier expansion play, we remain on track for meaningful production growth through 2026 and beyond. The continued increase in activity across our core areas reinforces a constructive long-term outlook.”

Quarterly Financial and Operating Results

Production

Black Stone reported mineral and royalty volumes of 35.9 MBoe/d (77% natural gas) for the first quarter of 2026, compared to 30.9 MBoe/d for the fourth quarter of 2025 and 34.2 MBoe/d for the first quarter of 2025.

Working-interest production was 1.1 MBoe/d for the first quarter of 2026, 1.2 MBoe/d in the fourth quarter of 2025, and 1.3 MBoe/d for the first quarter of 2025.

Total reported production averaged 37.0 MBoe/d (97% mineral and royalty, 76% natural gas) for the first quarter of 2026, compared to 32.1 MBoe/d and 35.5 MBoe/d for the fourth quarter of 2025 and the first quarter of 2025, respectively.

Realized Prices, Revenues, and Net Income

The Partnership’s average realized price per Boe, excluding the effect of derivative settlements, was $35.30 for the first quarter of 2026. This is an increase of 15% from $30.63 per Boe in the fourth quarter of 2025 and a 4% increase from $33.94 in the first quarter of 2025.

Black Stone reported oil and gas revenue of $117.5 million (46% oil and condensate) for the first quarter of 2026, an increase of 30% from $90.5 million in the fourth quarter of 2025. Oil and gas revenue in the first quarter of 2025 was $108.3 million.

The Partnership reported a loss on commodity derivative instruments of $64.6 million for the first quarter of 2026, composed of a $12.2 million loss from realized settlements and a non-cash $52.3 million unrealized loss due to the change in value of Black Stone’s derivative positions during the quarter. Black Stone reported a gain of $23.5 million and a loss of $56.0 million on commodity derivative instruments for the fourth quarter of 2025 and the first quarter of 2025, respectively.

Lease bonus and other income was $6.4 million for the first quarter of 2026. Lease bonus and other income for the fourth quarter of 2025 and the first quarter of 2025 was $4.7 million and $6.9 million, respectively.

The Partnership reported net income of $13.3 million for the first quarter of 2026, compared to net income of $72.2 million in the preceding quarter. For the first quarter of 2025, the Partnership reported net income of $15.9

bsm-202602230001621434FALSE00016214342026-02-232026-02-23

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT PURSUANT TO

SECTION 13 OR 15(D) OF THE

SECURITIES EXCHANGE ACT OF 1934

Date of Report (Date of earliest event reported): February 23, 2026

Black Stone Minerals, L.P.

(Exact name of registrant as specified in its charter)

Delaware 001-37362 47-1846692

(State or other jurisdiction(Commission File Number)(I.R.S. Employer of incorporation or organization) Identification No.)

1001 Fannin Street, Suite 2020

Houston, Texas 77002

(Address of principal executive offices) (Zip code)

Registrant’s telephone number, including area code:

Not Applicable (Former name or former address, if changed since last report)

(713) 445-3200

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions: ☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act: Title of each classTrading Symbol(s)Name of each exchange on which registered Common Units Representing Limited Partner Interests BSM New York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter). Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. o

The information in this Current Report, including the exhibit attached hereto as Exhibit 99.1, is being furnished and shall not be deemed “filed” for the purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that Section. The information in this Current Report shall not be incorporated by reference into any registration statement or other document pursuant to the Securities Act of 1933, as amended, except as otherwise expressly stated in such filing.

Item 2.02  Results of Operations and Financial Condition

On February 23, 2026, Black Stone Minerals, L.P. (“Black Stone Minerals”) issued a press release that announced its fourth quarter 2025 and full year 2025 financial and operating results. A copy of the press release is furnished herewith as Exhibit 99.1.

Item 7.01 Regulation FD Disclosure

On February 23, 2026, Black Stone Minerals provided summary guidance for 2026. This information is contained in the press release included in this report as Exhibit 99.1.

Item 9.01  Financial Statements and Exhibits

(d)    Exhibits

Exhibit NumberDescription 99.1 Black Stone Minerals, L.P. Press Release, dated February 23, 2026 104Cover Page Interactive Data File (formatted as Inline XBRL).

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SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

BLACK STONE MINERALS, L.P.

By:Black Stone Minerals GP, L.L.C., its general partner

Date: February 23, 2026By:/s/ Steve Putman Steve Putman Senior Vice President, General Counsel, and Secretary

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Exhibit Index

Exhibit Number Description 99.1 Black Stone Minerals, L.P. Press Release, dated February 23, 2026 104Cover Page Interactive Data File (formatted as Inline XBRL).

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bsm-202511030001621434FALSE00016214342025-11-032025-11-03

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT PURSUANT TO

SECTION 13 OR 15(D) OF THE

SECURITIES EXCHANGE ACT OF 1934

Date of Report (Date of earliest event reported): November 03, 2025

Black Stone Minerals, L.P.

(Exact name of registrant as specified in its charter)

Delaware001-3736247-1846692 (State or other jurisdiction(Commission File Number)(I.R.S. Employer of incorporation or organization) Identification No.)

1001 Fannin Street, Suite 2020 Houston,Texas77002

(Address of principal executive offices) (Zip code)

Registrant’s telephone number, including area code:

Not Applicable (Former name or former address, if changed since last report)

(713)445-3200

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each classTrading Symbol(s)Name of each exchange on which registered Common Units Representing Limited Partner InterestsBSMNew York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter). Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

The information included in this Current Report, including the exhibit attached hereto as Exhibit 99.1, is being furnished and shall not be deemed "filed" for the purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that Section. That information shall not be incorporated by reference into any registration statement or other document pursuant to the Securities Act of 1933, as amended, except as otherwise expressly stated in such filing.

Item 2.02.  Results of Operations and Financial Condition.

On November 3, 2025, Black Stone Minerals, L.P. (“Black Stone Minerals”) issued a press release that announced its third quarter 2025 financial and operating results. A copy of the press release is furnished herewith as Exhibit 99.1.

Item 9.01.  Financial Statements and Exhibits.

(d)    Exhibits

Exhibit NumberDescription 99.1 Black Stone Minerals, L.P. Press Release, dated November 3, 2025 104Black Stone Minerals, L.P. Press Release, dated Cover Page Interactive Data File (formatted as Inline XBRL).

2

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

BLACK STONE MINERALS, L.P.

By:Black Stone Minerals GP, L.L.C., its general partner

Date: November 3, 2025By:/s/ Steve Putman Steve Putman Senior Vice President, General Counsel, and Secretary

3

Exhibit Index

Exhibit Number Description 99.1 Black Stone Minerals, L.P. Press Release, dated November 3, 2025 104Black Stone Minerals, L.P. Press Release, dated Cover Page Interactive Data File (formatted as Inline XBRL).

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