Martin Marietta CHRO granted 1,277 RSUs

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

Rhea-AI Filing Summary

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

Martin Marietta Materials executive vice president and chief human resources officer Donald A. McCunniff received an award of 1,277 shares of common stock in the form of restricted stock units. The grant was made at no cash cost to him and was issued under the company’s Amended and Restated Stock-Based Award Plan.

The restricted stock units vest in equal annual installments over three years from the grant date, encouraging longer-term retention and alignment with shareholders. After this grant, McCunniff directly holds 4,750 shares of Martin Marietta common stock.

Insider Trade Summary

Grant/Award: 1,277 shares

Grant/Award 1 txn

Insider McCunniff Donald A.

Role EVP and CHRO

Type	Security	Shares	Price	Value
Grant/Award	Common Stock	1,277	$0.00	$0.00

Holdings After Transaction: Common Stock — 4,750 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 vests pro rata in equal installments over three years from the date of grant.

FAQ

What did Martin Marietta (MLM) EVP and CHRO Donald McCunniff report on this Form 4?

Donald McCunniff reported receiving 1,277 shares of common stock as a restricted stock unit award. The grant was made under Martin Marietta’s Amended and Restated Stock-Based Award Plan and represents a compensation-based acquisition, not an open-market stock purchase or sale.

How many Martin Marietta (MLM) shares does Donald McCunniff hold after this Form 4 transaction?

After the reported award, Donald McCunniff directly holds 4,750 shares of Martin Marietta common stock. This total reflects his ownership following the 1,277-share restricted stock unit grant disclosed in the filing and indicates his personal equity stake as an executive officer.

What type of equity award did Martin Marietta (MLM) grant to Donald McCunniff?

Martin Marietta granted Donald McCunniff a restricted stock unit award covering 1,277 shares of common stock. The award was issued at a stated price of $0.00 per share as part of the company’s Amended and Restated Stock-Based Award Plan for executive compensation.

How do the restricted stock units granted to MLM’s Donald McCunniff vest over time?

The restricted stock unit award vests pro rata in equal installments over three years from the grant date. This means one-third of the 1,277-share award becomes vested each year, aligning McCunniff’s compensation with longer-term company performance and retention objectives.

Did Donald McCunniff buy or sell Martin Marietta (MLM) shares in the market in this Form 4?

No, the Form 4 shows an acquisition coded as a grant, award, or other acquisition, not a market trade. McCunniff received 1,277 restricted stock units at a price of $0.00 per share as part of his equity compensation package, rather than buying or selling shares.

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Accepted by SEC EDGAR 02/24/2026 - 03:05 PM Learn about SEC filing dates

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)
02/20/2026

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	02/20/2026		A		1,277(1)	A	$0	4,750	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 vests pro rata in equal installments over three years from the date of grant.

	/s/ Sara W. Brown, attorney-in-fact	02/24/2026
	** 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.