[Form 4] Martin Marietta Materials Insider Trading Activity

Rhea-AI Filing Summary

John J. Koraleski, a director of Martin Marietta Materials, acquired 76 common stock units on 08/29/2025 under the company’s Common Stock Purchase Plan for Directors. After the reported transaction he directly beneficially owned 8,678 shares. He also holds 2,000 shares indirectly through SJK HOLDINGS and INVESTMENTS, LLC and 4,900 shares indirectly through the KORALESKI LIVING TRUST. The units were accrued under the director plan and will be settled in stock either in a lump sum or installments up to 10 years following termination or per the director’s election. The Form 4 was signed by attorney-in-fact Bradley D. Kohn on 09/02/2025.

Positive

• Director received equity under the company's director stock purchase plan, increasing direct alignment with shareholders
• Clear disclosure of settlement terms under the director plan (lump sum or installments up to 10 years)
• Proper reporting of indirect holdings through SJK HOLDINGS and the KORALESKI LIVING TRUST

Negative

• None.

Insights

Financial Analyst

TL;DR: Routine director equity accrual increased direct holdings by 76 units; immaterial to company valuation.

This Form 4 reports a director's grant-accrual settlement under the company's director stock purchase plan rather than a market purchase or sale. The director’s direct holdings rose to 8,678 shares with additional indirect holdings totaling 6,900 shares across entities and a trust. The transaction appears administrative and compensatory in nature, reflecting standard equity compensation practices for non-employee directors. There is no disclosure of sales, option exercises, or derivative transactions that would suggest liquidity events or governance shifts.

Corporate Governance Expert

TL;DR: Standard director compensation reporting under the equity plan; settlement timing options disclosed.

The filing specifically cites the Common Stock Purchase Plan for Directors and explains settlement mechanics, including lump-sum or installment settlement up to 10 years and timing tied to cessation of service or the director’s election. That disclosure aligns with typical governance transparency for director compensation. The presence of indirect holdings through a holdings entity and a revocable trust is common and properly reported. No governance red flags or unusual transactions are described in the form.

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^*

KORALESKI JOHN J

(Last) (First) (Middle)

4123 PARKLAKE AVENUE

(Street)

RALEIGH NC 27612

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
MARTIN MARIETTA MATERIALS INC [ MLM ]

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

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

3. Date of Earliest Transaction (Month/Day/Year)
08/29/2025

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
Common Stock	08/29/2025		A		76(1)	A	$616.4	8,678	D
Common Stock								2,000	I	SJK HOLDINGS and INVESTMENTS, LLC
Common Stock								4,900	I	JJ KORALESKI and SF KORALESKI CO-TTEE KORALESKI LIVING TRUST U/A DTD 01/18/1991

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. Common stock units were accrued under the Martin Marietta Materials, Inc. Common Stock Purchase Plan for Directors (the "Plan") and are to be settled in stock in a lump sum or in installments not to exceed 10 years commencing on (i) the date the reporting person ceases to be a Non-Employee Director, (ii) the date that is one month and one year following the date the reporting person ceases to be a Non-Employee Director, or (iii) the date elected by the Non-Employee Director that is later than the third anniversary of the date the fees are earned, in accordance with the reporting person's election under the Plan.

	/s/ Bradley D. Kohn, attorney-in-fact	09/02/2025
	** Signature of Reporting Person	Date
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).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

FAQ

What did John J. Koraleski report on the Form 4 for MLM?

He reported the acquisition of 76 common stock units on 08/29/2025 under the Martin Marietta director stock purchase plan and beneficial ownership details.

How many MLM shares does John J. Koraleski beneficially own after the transaction?

He directly beneficially owns 8,678 shares and indirectly holds 2,000 shares via SJK HOLDINGS and 4,900 shares via the KORALESKI LIVING TRUST.

Are the acquired units immediately settled in stock according to the Form 4?

The units were accrued under the director plan and are to be settled in stock either in a lump sum or in installments not to exceed 10 years, per the plan's settlement options.

Does the Form 4 indicate any sales or derivative transactions by the director?

No. The filing shows an acquisition under the plan and does not disclose any sales, option exercises, or derivative transactions.

Who signed the Form 4 and when was it signed?

The Form 4 was signed by attorney-in-fact Bradley D. Kohn on 09/02/2025.