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): June 18, 2026

LandBridge Company LLC

(Exact name of registrant as specified in its charter)

Registrant’s telephone number, including area code: (713) 230-8864

Not applicable

(Former name or former address, if changed since last report.)

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:

Securities registered pursuant to Section 12(b) of the Securities Exchange Act of 1934:

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. ☐

Item 5.07 Submission of Matters to a Vote of Security Holders.

On June 18, 2026, LandBridge Company LLC (the “Company”) held its 2026 annual meeting of shareholders (the “2026 Annual Meeting”), at which the Company’s shareholders voted on proposals to (i) elect each of the directors nominated by the board of directors of the Company (the “Board”), each for a one-year term expiring at the Company’s 2027 annual meeting of shareholders (the “2027 Annual Meeting”) or until each such director’s successor is duly elected and qualified or until each such director’s earlier death, resignation, disqualification or removal, (ii) ratify the appointment of Deloitte & Touche LLP as the Company’s independent registered public accounting firm for the fiscal year ending December 31, 2026, (iii) approve, on a non-binding, advisory basis, the compensation of the Company’s named executive officers (the “Named Executive Officers”) and (iv) approve the frequency of future advisory votes to approve executive compensation.

As of April 23, 2026, the record date for the 2026 Annual Meeting, the Company had 27,839,229 Class A shares representing limited liability company interests in the Company (the “Class A shares”) and 49,177,775 Class B shares representing limited liability company interests in the Company (together with the Class A shares, the “common shares”) outstanding. Holders of common shares were entitled to one vote per common share on each of the forgoing proposals, each of which is more fully described in the Company’s definitive proxy statement on Schedule 14A filed with the U.S. Securities and Exchange Commission on April 30, 2026. There were 71,790,216 common shares represented either virtually or by proxy at the 2026 Annual Meeting, which represented approximately 93.21% of the total voting power of the Company, thereby constituting a quorum.

A summary of the voting results, as certified by the Inspector of Election for the 2026 Annual Meeting, is set forth below.

Proposal 1: Election of Directors

The Company’s shareholders elected all 11 of the director nominees to serve until the 2027 Annual Meeting or until each such director’s successor is duly elected and qualified or until each such director’s earlier death, resignation, disqualification or removal.

Proposal 2: Ratification of the Appointment of Deloitte & Touche LLP as the Independent Registered Public Accounting Firm of the Company for Fiscal Year Ending December 31, 2026

The Company’s shareholders ratified the appointment of Deloitte & Touche LLP as the Company’s Independent Registered Public Accounting Firm for the fiscal year ending December 31, 2026.

Proposal 3: Non-binding, advisory vote to approve the compensation of the Company’s Named Executive Officers

The Company’s shareholders approved, on a non-binding, advisory basis, the compensation of the Company’s Named Executive Officers.

Proposal 4: Non-binding, advisory vote to approve the frequency of future advisory votes on the compensation of the Company’s Named Executive Officers

The Company’s shareholders approved, on a non-binding, advisory basis, a frequency of one year for future advisory votes on the compensation of the Company’s Named Executive Officers.

Based on the vote of our shareholders at the 2026 Annual Meeting, and consistent with the Board’s recommendation set forth in the Company’s proxy statement, the Board has determined that the Company will conduct a vote to approve, on an advisory basis, the compensation of the Company’s Named Executive Officers every year until the next shareholder advisory vote on the frequency of future advisory votes on the compensation of the Company’s Named Executive Officers or until the Board otherwise determines that a different frequency for such advisory votes is in the best interests of the Company’s shareholders.

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.

LANDBRIDGE COMPANY LLC

By: /s/ Scott L. McNeely

Name: Scott L. McNeely

Title: Chief Financial Officer

Dated: June 24, 2026