Vanguard Capital Management Boosts Stake in Martin Marietta Materials (MLM)

Rhea-AI Filing Summary

Vanguard Capital Management reported beneficial ownership of 4,505,369 shares of Martin Marietta Materials Inc Common Stock, equal to 7.47% of the class. The filing states Vanguard has sole dispositive power over 4,505,369 shares and sole voting power over 587,986 shares. The schedule clarifies these holdings reflect shares managed by Vanguard Capital Management LLC and affiliated business divisions, including shares held in Vanguard funds and client accounts. Signature is provided by the Head of Global Fund Administration on 04/30/2026.

Insights

Institutional Ownership Analyst

Large passive stake disclosed: Vanguard holds 7.47% of Martin Marietta Materials.

Vanguard Capital Management reports 4,505,369 shares beneficially owned with sole dispositive control, indicating a meaningful institutional position. The filing attributes holdings to Vanguard and affiliated advisory/business units and notes shares include fund and client accounts.

Cash‑flow treatment and planned transactions are not stated here; subsequent filings or trading notices would show any changes in voting or disposition. Timing and additional portfolio moves are not disclosed in this excerpt.

Key Figures

Beneficial ownership: 4,505,369 shares Percent of class: 7.47% Sole voting power: 587,986 shares +1 more

4 metrics

Beneficial ownership 4,505,369 shares amount beneficially owned reported on Schedule 13G

Percent of class 7.47% percent of Common Stock class reported

Sole voting power 587,986 shares shares with sole power to vote reported in Item 4

Sole dispositive power 4,505,369 shares shares with sole power to dispose reported in Item 4

Key Terms

Schedule 13G, Beneficially owned, Dispositive power, Sole voting power

4 terms

Schedule 13G regulatory

"Name of person filing: Vanguard Capital Management (Schedule 13G disclosure)"

A Schedule 13G is a formal document that investors file with the government when they acquire a large ownership stake in a company, usually for investment purposes rather than control. It helps keep the public informed about who owns significant parts of a company's shares, which can influence how the company is managed and how investors make decisions. Filing this schedule is important for transparency and understanding the ownership landscape of publicly traded companies.

Beneficially owned financial

"Amount beneficially owned: 4505369"

Beneficially owned describes securities or assets where a person has the economic rights and control—such as the right to receive dividends and to direct voting—even if legal title is held in another name. Think of it like having the keys and using a car that’s registered to someone else: you get the benefits and make decisions. Investors care because beneficial ownership reveals who truly controls value and voting power, affecting corporate decisions and takeover dynamics.

Dispositive power regulatory

"Sole power to dispose or to direct the disposition of: 4505369"

Dispositive power is the authority to decide the final outcome of an asset, legal claim, contract, or corporate action — in effect the power to dispose of or resolve something. For investors it matters because whoever holds that authority can determine who gets paid, who controls an asset or vote, and how risks and returns are allocated; think of it like holding the key that lets you lock in the winner or loser in a deal.

Sole voting power regulatory

"Sole power to vote or to direct the vote: 587,986.00"

Sole voting power is the exclusive right to cast votes attached to a shareholder’s stock without needing approval from anyone else. Like holding the only remote control for a TV, it lets that holder decide corporate matters such as board members, mergers, and policy changes, making it important to investors because it concentrates control and can strongly influence a company’s strategy and the value of its shares.

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

Martin Marietta Materials Inc

(Name of Issuer)

Common Stock

(Title of Class of Securities)

573284106

(CUSIP Number)

03/31/2026

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

Rule 13d-1(b)

Rule 13d-1(c)

Rule 13d-1(d)

schemaVersion:

SCHEDULE 13G

CUSIP Number(s): 573284106

1

Names of Reporting Persons

Vanguard Capital Management

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

PENNSYLVANIA

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 587,986.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 4,505,369.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

4,505,369.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

7.47 %

12

Type of Reporting Person (See Instructions)

IA

Comment for Type of Reporting Person: In accordance with SEC Release No. 34-39538 (January 12, 1998), this Schedule 13G reflects the securities beneficially owned, or deemed to be beneficially owned, by Vanguard Capital Management LLC and the following affiliates of Vanguard Capital Management LLC or business divisions of such affiliates: Vanguard Asset Management Limited, Vanguard Fiduciary Trust Company, Vanguard Global Advisers, LLC and Vanguard Investments Australia Ltd. This Schedule 13G includes securities held by Vanguard funds, or sleeves thereof, over which Vanguard Capital Management LLC exercises dispositive power, in addition to securities held by clients over which the affiliates or business divisions of such affiliates indicated above exercise dispositive and/or voting power. This Schedule 13G does not include securities, if any, beneficially owned by other subsidiaries or affiliates of Vanguard Capital Management LLC, or business divisions of such subsidiaries, whose ownership of securities is disaggregated from that of the reporting business unit in accordance with such release.

SCHEDULE 13G

Item 1.
(a)	Name of issuer: Martin Marietta Materials Inc
(b)	Address of issuer's principal executive offices: 4123 Parklake Avenue, Raleigh, NC, 27612
Item 2.
(a)	Name of person filing: Vanguard Capital Management
(b)	Address or principal business office or, if none, residence: 100 Vanguard Blvd,, Malvern, PA, 19355
(c)	Citizenship: PA
(d)	Title of class of securities: Common Stock
(e)	CUSIP Number(s): 573284106
Item 3.	If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:
(a)	Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);
(b)	Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
(c)	Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
(d)	Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
(e)	An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
(f)	An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
(g)	A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
(h)	A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
(i)	A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
(j)	A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J), please specify the type of institution:
(k)	Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
Item 4.	Ownership
(a)	Amount beneficially owned: 4505369
(b)	Percent of class: 7.47 %
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 587986
	(ii) Shared power to vote or to direct the vote: 0
	(iii) Sole power to dispose or to direct the disposition of: 4505369
	(iv) Shared power to dispose or to direct the disposition of: 0
Item 5.	Ownership of 5 Percent or Less of a Class.
	Not Applicable
Item 6.	Ownership of more than 5 Percent on Behalf of Another Person.
	If any other person is known to have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, such securities, a statement to that effect should be included in response to this item and, if such interest relates to more than 5 percent of the class, such person should be identified. A listing of the shareholders of an investment company registered under the Investment Company Act of 1940 or the beneficiaries of employee benefit plan, pension fund or endowment fund is not required. Vanguard Capital Management, including investment companies registered under the Investment Company Act of 1940 and other managed accounts, have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, the securities reported herein.No one other person's interest in the securities reported herein is more than 5%.
Item 7.	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
	Not Applicable
Item 8.	Identification and Classification of Members of the Group.
	Not Applicable
Item 9.	Notice of Dissolution of Group.
	Not Applicable

Item 10.

Certifications:

By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under § 240.14a-11.

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

Vanguard Capital Management

Signature:	Ashley Grim
Name/Title:	Head of Global Fund Administration
Date:	04/30/2026

FAQ

What stake does Vanguard Capital Management report in Martin Marietta Materials (MLM)?

Vanguard reports beneficial ownership of 4,505,369 shares, representing 7.47% of Martin Marietta Materials common stock, with sole dispositive power over those shares as stated in the filing.

Does the filing show Vanguard has voting control for the MLM shares?

The filing shows Vanguard has sole voting power for 587,986 shares and sole dispositive power for 4,505,369 shares, per the Schedule 13G disclosure signed on 04/30/2026.

Are the Vanguard holdings in MLM held for funds or clients?

Yes. The filing states holdings include securities held by Vanguard funds and client accounts over which Vanguard or its affiliates exercise dispositive and/or voting power, as described in the disclosure.

Does this Schedule 13G indicate Vanguard plans to sell MLM shares?

No sale plan or disposition timing is provided. The Schedule 13G only discloses beneficial ownership and voting/dispositive powers; it does not state any intended transactions or cash‑flow treatment.