Form 8-K

8-K — MARTIN MARIETTA MATERIALS INC

Accession: 0000950157-26-000850

Filed: 2026-08-05

Period: 2026-08-05

CIK: 0000916076

SIC: 1400 (MINING, QUARRYING OF NONMETALLIC MINERALS (NO FUELS))

Item: Other Events

Item: Financial Statements and Exhibits

Documents

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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D. C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported):

August 5, 2026

Martin Marietta Materials, Inc.

(Exact name of Registrant as Specified in Its

Charter)

North Carolina

(State or Other Jurisdiction of Incorporation)

1-12744

(Commission File Number)

56-1848578

(I.R.S. Employer Identification No.)

4123 Parklake Avenue

Raleigh, North Carolina

(Address of Principal Executive Offices)

27612

(Zip Code)

Registrant’s Telephone Number, Including

Area Code: 919-781-4550

(Former Name or Former Address, if Changed Since

Last Report)

Check the appropriate box below if the Form 8-K filing is intended

to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐

Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐

Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐

Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐

Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b)

of the Act:

Title of each class

Trading Symbol(s)

Name of each exchange on which registered

Common Stock, $0.01 par value per share

MLM

New York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth

company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange

Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant

has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant

to Section 13(a) of the Exchange Act. ☐

Item 8.01. Other Events.

As previously announced,

on June 27, 2026, Martin Marietta Materials, Inc., a North Carolina corporation (“Martin Marietta” or the “Company”),

and LNA Holding SRL, a société à responsabilité limitée organized under the laws of Belgium, entered

into a Securities Sale Agreement, pursuant to which Martin Marietta will acquire all of the outstanding equity interests in Lhoist North

America, Inc., which owns and operates the business of producing, distributing, marketing and selling lime, dolomitic lime, limestone-

and dolomitic stone-based industrial minerals and products, and aggregates in North America, for $13.5 billion in cash and shares of Martin

Marietta common stock (the “Transaction”).

On August 5, 2026, Martin

Marietta issued a press release announcing that it has received all necessary regulatory approvals with respect to the Transaction. Martin

Marietta expects the Transaction to close in the third quarter of 2026, subject to customary closing conditions.

A copy of the press release

is furnished as Exhibit 99.1 hereto and is incorporated by reference herein.

The information in this Item

8.01 of this Current Report on Form 8-K, including Exhibit 99.1 attached hereto, is being furnished to the U.S. Securities and Exchange

Commission and shall not be deemed “filed” for purposes of Section 18 of the U.S. Securities Exchange Act of 1934, as amended

(the “Exchange Act”), or otherwise subject to the liabilities of that section. This information shall not be deemed

to be incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act, except as shall be expressly

set forth by specific reference in such a filing.

Forward-Looking Statements

This Current Report on Form 8-K contains forward-looking

statements under the federal securities laws, including the Private Securities Litigation Reform Act of 1995. These statements include:

the expected timing for completing the transaction. These statements involve risks and uncertainties and are based on assumptions that

the Company believes are reasonable, but which may differ materially from actual results, including, among others, risks and uncertainties

relating to the timing of consummation of the transaction; the risk that the conditions to closing of the transaction may not be satisfied,

or that the closing of the transaction does not occur. These statements reflect the Company’s current expectations or forecasts

of future events. You can identify these statements because they do not relate only to historical or current facts and may use words such

as “guidance”, “anticipate”, “may”, “expect”, “should”, “believe”,

“will”, and other words of similar meaning in connection with future events or future performance. Any or all of the Company’s

forward-looking statements herein and in other publications may prove to be incorrect.

A further list and description of risks, uncertainties

and other matters can be found in the Company’s Annual Report on Form 10-K for the year ended December 31, 2025 and in the Company’s

subsequent reports on Form 10-Q, including the sections thereof captioned “Other Matters” and “Item 1A. Risk Factors”,

and in the Company’s subsequent reports on Form 8-K. Except as required by law, the Company does not undertake any obligation to

publicly update any forward-looking statements whether as a result of new information, future events, changed circumstances or otherwise.

Item 9.01. Financial Statements and Exhibits.

(d) Exhibits

Exhibit No.

Description of Exhibit

99.1

Press Release, dated August 5, 2026

104

Cover Page Interactive Data File (embedded within the Inline XBRL document)

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934,

the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

MARTIN MARIETTA MATERIALS, INC.

Date: August 5, 2026

By:

/s/ George Schoen

Name:

George Schoen

Title:

Executive Vice President,

General Counsel and Corporate Secretary

EX-99.1 — PRESS RELEASE

EX-99.1

Filename: ex99-1.htm · Sequence: 2

Exhibit 99.1

MARTIN

MARIETTA RECEIVES REGULATORY APPROVALS FOR

LHOIST

NORTH AMERICA TRANSACTION

Raleigh, N.C. (August 5, 2026) – Martin

Marietta Materials, Inc. (NYSE: MLM) (Martin Marietta or the Company), today announced that it has received all necessary regulatory approvals

for its previously announced combination with Lhoist North America, Inc. (LNA). The transaction is now expected to close in the third

quarter of 2026, subject to customary closing conditions.

About Martin Marietta

Martin Marietta, a member of the S&P 500 Index,

is an American-based company and a leading supplier of aggregates and other building materials. Through a network of operations spanning

29 states, Canada and The Bahamas, dedicated Martin Marietta teams supply the resources necessary for building the solid foundations on

which our communities thrive. Martin Marietta’s Specialties business provides high-purity magnesia and dolomitic lime products used

worldwide in environmental, industrial, agricultural and other specialty applications. Upon completion of the LNA combination, Martin

Marietta expects to become the nation’s leading producer of lime and limestone solutions. For more information, visit www.martinmarietta.com

or www.magnesiaspecialties.com.

Investor Contacts:

Jacklyn Rooker

Vice President, Investor Relations

+1 (919) 510-4736

Jacklyn.Rooker@martinmarietta.com

MLM-G.

This press release

contains forward-looking statements under the federal securities laws, including the Private Securities Litigation Reform Act of 1995.

These statements include: the expected timing for completing the transaction. These statements involve risks and uncertainties and are

based on assumptions that the Company believes are reasonable, but which may differ materially from actual results, including, among

others, risks and uncertainties relating to the timing of consummation of the transaction; the risk that the conditions to closing of

the transaction may not be satisfied, or that the closing of the transaction does not occur. These statements reflect the Company’s

current expectations or forecasts of future events. You can identify these statements because they do not relate only to historical or

current facts and may use words such as “guidance”, “anticipate”, “may”, “expect”, “should”,

“believe”, “will”, and other words of similar meaning in connection with future events or future performance.

Any or all of the Company’s forward-looking statements herein and in other publications may prove to be incorrect.

A further

list and description of risks, uncertainties and other matters can be found in Martin Marietta’s Annual Report on Form 10-K for

the year ended December 31, 2025 and in Martin Marietta’s subsequent reports on Form 10-Q, including the sections thereof captioned

“Other Matters” and “Item 1A. Risk Factors”, and in Martin Marietta’s subsequent reports on Form 8-K. Except

as required by law, Martin Marietta does not undertake any obligation to publicly update any forward-looking statements whether as a

result of new information, future events, changed circumstances or otherwise.

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