Sec Form 4 Filing - Capobianco David N @ LandBridge Co LLC - 2025-05-23

FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person Capobianco David N 2. Issuer Name and Ticker or Trading Symbol LandBridge Co LLC [ LB] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) X __ Director X __ 10% Owner _____ Officer (give title below) _____ Other (specify below) (Last) (First) (Middle) C/O LANDBRIDGE COMPANY LLC, 5555 SAN FELIPE STREET, SUITE 1200 3. Date of Earliest Transaction (MM/DD/YY) 05/23/2025 (Street) HOUSTON, TX77056 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) __ X __ Form filed by One Reporting Person _____ Form filed by More than One Reporting Person (City) (State) (Zip)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Class B shares ( 1 ) 05/23/2025 J( 1 )( 2 ) 1,900,000 D $ 0 ( 1 ) 51,241,496 ( 3 ) I See Footnote ( 4 ) Class A shares 05/23/2025 C( 1 )( 2 ) 1,900,000 A $ 0 ( 1 ) 1,900,000 I See Footnote ( 4 ) Class A shares 05/23/2025 S( 2 ) 1,900,000 D $ 75.25 ( 2 ) 0 I See Footnote ( 4 )

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities) 1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5) 6. Date Exercisable and Expiration Date (MM/DD/YY) 7. Title and Amount of Underlying Securities (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form of Derivative Securi ty: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4) Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares DBR Land Holdings LLC Units ( 1 ) ( 1 ) 05/23/2025 C( 1 )( 2 ) 1,900,000 ( 1 ) ( 1 ) Class A Shares 1,900,000 $ 0 ( 1 ) 51,241,496 ( 3 ) I See Footnote ( 4 )

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Capobianco David N C/O LANDBRIDGE COMPANY LLC 5555 SAN FELIPE STREET, SUITE 1200 HOUSTON, TX77056 X X Signatures /s/ David N. Capobianco 05/28/2025 Signature of Reporting Person Date

Explanation of Responses:

( 1 )Pursuant to the Amended and Restated Limited Liability Company Agreement of DBR Land Holdings LLC ("OpCo"), each unit representing membership interests in OpCo ("OpCo Units") (together with the delivery for no consideration of an equal number of Class B shares representing limited liability company interests ("Class B Shares") in LandBridge Company LLC (the "Issuer")) may be redeemed for an equal number of newly issued Class A shares representing limited liability company interests in the Issuer ("Class A Shares") or for cash, at the Issuer's election, subject to satisfaction of certain requirements. OpCo Units do not expire. Class B Shares do not represent economic interests in the Issuer. ( 2 )In connection with the sale by LandBridge Holdings LLC ("LandBridge Holdings") pursuant to Rule 144 of the Securities Act of 1933, as amended, through a broker-dealer, on May 23, 2025, LandBridge Holdings (i) redeemed 1,900,000 OpCo Units (together with the cancellation of 1,900,000 Class B Shares) for 1,900,000 Class A Shares and (ii) sold 1,900,000 Class A Shares at a price per share of $75.25. ( 3 )Reflects the cancellation of 34,674 OpCo Units and 51,682 OpCo Units (each, together with the cancellation of a corresponding number of Class B Shares) in lieu of the payment of a tax distribution by OpCo to the Issuer in excess of the Issuer's current income tax obligation for the three months ended December 31, 2024 and March 31, 2025, respectively. The number of cancelled OpCo Units was determined based on the Class A Share price as of the tax distribution date. ( 4 )LandBridge Holdings is ultimately controlled by the Reporting Person. As a result of the foregoing, the Reporting Person may exercise voting and dispositive power over the Class B Shares held by LandBridge Holdings and may be deemed to be the beneficial owner thereof. The Reporting Person disclaims beneficial ownership of OpCo Units and Class B Shares in excess of his pecuniary interest therein, if any.

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).

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