Martin Marietta Materials (MLM) insider files Form 4 for tax share sale

Rhea-AI Filing Summary

Martin Marietta Materials reported an insider stock transaction by an officer serving as SVP, Controller & CAO. On 12/16/2025, the insider disposed of 32 shares of common stock in a transaction coded "F," which typically indicates shares withheld to cover taxes on an equity award.

The shares were valued at $629.49 each for this transaction. After the withholding, the officer beneficially owns 11,066 shares of Martin Marietta common stock, held in direct ownership.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider Cardin Robert J

Role SVP, Controller & CAO

Type	Security	Shares	Price	Value
Tax Withholding	Common Stock	32	$629.49	$20K

Holdings After Transaction: Common Stock — 11,066 shares (Direct)

Footnotes (1)

Form 4 Insider Transactions: What Each Field Means →

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^*

Cardin Robert 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)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	SVP, Controller & CAO

3. Date of Earliest Transaction (Month/Day/Year)
12/16/2025

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	12/16/2025		F		32	D	$629.49	11,066	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:

	/s/ Bradley D. Kohn, attorney-in-fact	12/17/2025
	** 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 insider transaction did Martin Marietta Materials (MLM) report on this Form 4?

The filing shows an officer of Martin Marietta Materials disposed of 32 shares of common stock on 12/16/2025 in a transaction coded "F," which is typically used for tax withholding on equity awards.

At what price were the Martin Marietta (MLM) shares transacted in this insider filing?

The 32 shares of Martin Marietta common stock were reported at a transaction price of $629.49 per share.

How many Martin Marietta Materials shares does the insider own after this Form 4 transaction?

Following the reported transaction, the officer beneficially owns 11,066 shares of Martin Marietta Materials common stock, held in direct ownership.

What is the reporting persons relationship to Martin Marietta Materials in this Form 4?

The reporting person is identified as an officer of Martin Marietta Materials, serving as SVP, Controller & CAO.

Does this Martin Marietta (MLM) Form 4 involve derivative securities?

The provided portion of the filing lists a transaction only in common stock in Table I, and the section for derivative securities in Table II does not show any specific entries.

Is this Martin Marietta Materials Form 4 filed for one or multiple reporting persons?

The document indicates that the Form 4 is filed by one reporting person, rather than by more than one reporting person.

Who signed the Martin Marietta Materials (MLM) Form 4?

The Form 4 was signed by /s/ Bradley D. Kohn as attorney-in-fact on 12/17/2025.