Martin Marietta (NYSE: MLM) director receives 313-share stock grant

Rhea-AI Filing Summary

Mack Mary T reported acquisition or exercise transactions in this Form 4 filing.

Martin Marietta Materials director Mary T. Mack received a stock award. On May 14, 2026, she was granted 313 shares of Common Stock in a non-cash transaction at a reported price of $0.0000 per share. After this grant, she directly holds 914 Common Stock shares. This reflects routine equity-based director compensation rather than an open-market purchase or sale.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider Mack Mary T

Role null

Type	Security	Shares	Price	Value
Grant/Award	Common Stock	313	$0.00	--

Holdings After Transaction: Common Stock — 914 shares (Direct, null)

Footnotes (1)

Key Figures

Shares granted: 313 shares Grant price per share: $0.0000 per share Shares held after transaction: 914 shares

3 metrics

Shares granted 313 shares Common Stock grant on May 14, 2026

Grant price per share $0.0000 per share Reported transaction price for equity award

Shares held after transaction 914 shares Total direct Common Stock holdings post-grant

Key Terms

Common Stock, Grant, award, or other acquisition, non-derivative

3 terms

Common Stock financial

"She was granted 313 shares of Common Stock in a non-cash transaction"

Common stock represents ownership shares in a company, giving investors a stake in its success and a say in important decisions through voting rights. It is the most common type of stock traded on markets and can provide income through dividends, as well as potential for value growth. For investors, holding common stock means sharing in the company’s profits and risks.

Grant, award, or other acquisition financial

"Transaction code A is described as a "Grant, award, or other acquisition""

non-derivative financial

"The 313-share transaction is classified as non-derivative Common Stock"

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^*

Mack Mary T

(Last) (First) (Middle)

4123 PARKLAKE AVE

(Street)

RALEIGH NORTH CAROLINA 27610

(City) (State) (Zip)

UNITED STATES

(Country)

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)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/14/2026

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

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

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

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	05/14/2026		A		313	A	$0	914	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/ Sara W. Brown, attorney-in-fact	05/18/2026
	** 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.
* Form 4: SEC 1474 (03-26)

FAQ

What did Martin Marietta (MLM) director Mary T. Mack report on this Form 4?

Mary T. Mack reported receiving a grant of 313 shares of Martin Marietta Materials Common Stock. The award was recorded at $0.0000 per share, indicating equity compensation rather than a market purchase. Following the grant, she directly holds 914 shares.

Was the MLM insider transaction a stock purchase or a compensation grant?

The MLM insider transaction was a compensation grant, not a market purchase. The Form 4 shows transaction code A, described as a "Grant, award, or other acquisition," with 313 Common Stock shares received at a price of $0.0000 per share.

How many Martin Marietta (MLM) shares does Mary T. Mack hold after the grant?

After the grant, Mary T. Mack directly holds 914 shares of Martin Marietta Materials Common Stock. This total reflects her position immediately following the 313-share award reported on the Form 4 filed for the May 14, 2026 transaction date.

Does the Form 4 for MLM show any stock sales by Mary T. Mack?

The Form 4 does not show any stock sales by Mary T. Mack. It reports only an acquisition via a grant of 313 Common Stock shares under transaction code A, with no corresponding sell transactions or derivative exercises disclosed in the provided summary data.

What does transaction code A mean in the MLM Form 4 filing?

Transaction code A in the MLM Form 4 filing means a "Grant, award, or other acquisition." In this case, it indicates that Mary T. Mack received 313 Common Stock shares as an equity award at a recorded price of $0.0000 per share, classified as a non-derivative transaction.