[Form 4] LandBridge Company LLC Insider Trading Activity

Rhea-AI Filing Summary

On July 1, 2025, SeaStar Medical Holding Corporation (ICU) Chief Medical Officer Kevin Chung filed a Form 4 disclosing the vesting and conversion of 5,000 restricted stock units (RSUs) into common shares. The transaction was coded “M,” signifying a conversion of derivative equity awards rather than an open-market purchase, and carried a price of $0 per share.

After the transaction, Dr. Chung now directly owns 48,184 ICU shares. This figure incorporates 25,000 shares that were previously reported as unvested RSUs in Table II and have been moved to Table I. The filing also corrects a prior one-share rounding error, and no derivative RSUs remain reportable from this grant.

The RSUs originated from a November 15, 2024 grant of 15,000 units that vest in three equal annual tranches beginning July 1, 2024; the current filing reflects the first installment. Because the shares were received under a pre-arranged compensation plan at no cost, the event does not inject new capital into the company nor constitute an open-market confidence signal. Nevertheless, it modestly increases insider equity alignment and provides transparency regarding executive compensation.

Insights

Financial Analyst

TL;DR: Routine RSU vesting; minimal direct market impact.

The filing simply records the first tranche of a previously granted RSU award. Although it boosts Chung’s direct stake to 48,184 shares, the stock was acquired at no cost and does not represent an open-market buy. From a valuation standpoint, the transaction is neutral: it neither alters SeaStar Medical’s cash position nor signals management’s view on current pricing. Investors may view the increased ownership as incremental alignment, but the absolute share count is unlikely to sway the investment thesis given the company’s overall float.

Corporate Governance Expert

TL;DR: Proper Section 16 reporting; alignment incrementally improved.

The Form 4 is timely and complete, demonstrating compliance with Section 16(a) obligations. Moving previously unvested RSUs into Table I clarifies ownership and enhances disclosure accuracy. While the vesting is standard under the firm’s 2024 equity plan, the absence of remaining derivative units for this grant indicates transparent bookkeeping. Governance watchers may note the small but positive shift in insider-shareholder alignment.

SEC Form 4

FORM 4

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
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

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

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Bolling Harrison Fenner

(Last) (First) (Middle)

5555 SAN FELIPE STREET, SUITE 1200

(Street)

HOUSTON TX 77056

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
LandBridge Co LLC [ LB ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	See Remarks

3. Date of Earliest Transaction (Month/Day/Year)
07/01/2025

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	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 A shares	07/01/2025		F		8,366(1)	D	$66.38	66,024	D

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 (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	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 (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (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: 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

Explanation of Responses:

1. In connection with the vesting and settlement of restricted share units ("RSUs") through the issuance of Class A shares of LandBridge Company LLC (the "Issuer") pursuant to the LandBridge Company LLC Long-Term Incentive Plan, the Issuer withheld Class A shares that would otherwise have been issued to the Reporting Person to satisfy their tax withholding obligations.

Remarks:

Executive Vice President and General Counsel

	/s/ Scott L. McNeely, Attorney-In-Fact	07/03/2025
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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