Martin Marietta EVP granted 2,960 stock units

McCunniff Donald A. reported acquisition or exercise transactions in this Form 4 filing.

Accepted by SEC EDGAR 03/03/2026 - 03:47 PM EST Learn about SEC filing dates

Rhea-AI Filing Summary

McCunniff Donald A. reported acquisition or exercise transactions in this Form 4 filing.

Martin Marietta Materials executive Donald A. McCunniff, EVP and CHRO, received a grant of 2,960 shares of common stock as a restricted stock unit award. The award was granted under the company’s Amended and Restated Stock-Based Award Plan and will cliff vest on the third anniversary of the award date, subject to continued employment and other conditions in the award agreement. Following this award, his directly owned common stock holdings total 7,518 shares.

Insider Trade Summary

Grant/Award: 2,960 shares

Grant/Award 1 txn

Insider McCunniff Donald A.

Role EVP and CHRO

Type	Security	Shares	Price	Value
Grant/Award	Common Stock	2,960	$0.00	$0.00

Holdings After Transaction: Common Stock — 7,518 shares (Direct)

Footnotes (1)

1. F1. Restricted stock unit award granted under the Martin Marietta Materials, Inc. Amended and Restated Stock-Based Award Plan, which award cliff vests on the third anniversary of the award date, subject to continued employment and other terms and conditions specified in the award agreement.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider transaction did MLM executive Donald McCunniff report on this Form 4?

Donald A. McCunniff reported receiving a grant of 2,960 shares of Martin Marietta common stock as a restricted stock unit award. This is a non-cash equity grant recorded at a price of $0.0000 per share, increasing his direct holdings to 7,518 shares.

What type of equity award did MLM’s EVP and CHRO receive?

The EVP and CHRO received a restricted stock unit award covering 2,960 shares of Martin Marietta common stock. The award was granted under the Martin Marietta Materials, Inc. Amended and Restated Stock-Based Award Plan, reflecting equity-based compensation rather than an open-market stock purchase.

When do Donald McCunniff’s 2,960 restricted stock units in MLM vest?

The 2,960 restricted stock units are scheduled to cliff vest on the third anniversary of the award date. Vesting is subject to Mr. McCunniff’s continued employment and other terms and conditions specified in the underlying award agreement governing the grant.

How many MLM shares does Donald McCunniff own after this Form 4 transaction?

After this transaction, Donald McCunniff’s directly owned holdings total 7,518 shares of Martin Marietta common stock. The increase reflects the 2,960-share restricted stock unit award reported, which was recorded at a transaction price of $0.0000 per share in the filing.

Was the MLM Form 4 transaction a stock purchase or a grant?

The Form 4 reports a grant, not a market purchase. It is classified under transaction code “A” as a grant, award, or other acquisition and represents a restricted stock unit award of 2,960 shares provided as part of stock-based compensation.

Is Donald McCunniff’s ownership in MLM direct or through another entity?

The filing classifies Mr. McCunniff’s ownership as direct, indicated by the “D” ownership code. The reported 7,518 shares of Martin Marietta common stock following the transaction are held directly rather than through an indirect entity such as a trust or partnership.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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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^*

McCunniff Donald A.

(Last) (First) (Middle)

4123 PARKLAKE AVE

(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)
	EVP and CHRO

3. Date of Earliest Transaction (Month/Day/Year)
03/01/2026

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	03/01/2026		A		2,960(1)	A	$0	7,518	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. Restricted stock unit award granted under the Martin Marietta Materials, Inc. Amended and Restated Stock-Based Award Plan, which award cliff vests on the third anniversary of the award date, subject to continued employment and other terms and conditions specified in the award agreement.

	/s/ Sara W. Brown, attorney-in-fact	03/03/2026
	** 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.