Martin Marietta Materials

The company was incorporated in North Carolina in November 1993 to succeed to the assets and liabilities of Martin Marietta Corporation’s materials group. Its initial public offering, completed in February 1994, sold 8,797,500 shares, about 19% of those outstanding, and trading on the New York Stock Exchange began on February 17, 1994.⁠[1]

In March 1995 Martin Marietta Corporation and Lockheed Corporation combined to form Lockheed MartinLockheed MartinLockheed Martin is an American aerospace and defense company whose main businesses include military aircraft, missile defense, rotary-wing aircraft and mission systems, and space systems.Open the full entry, which held about 81% of the company’s common stock. In October 1996 a tax-free exchange offer let Lockheed Martin shareholders exchange their shares for the company’s stock, leaving all of its common stock publicly traded.⁠[2]

On May 28, 1997, the company bought American Aggregates Corporation for about $242 million in cash, and on December 4, 1998, it acquired Redland Stone Products Company for $272 million in cash. Net sales for 1998 were $1,057.7 million.⁠[3]

In November 2009 the company announced that chairman and CEO Stephen P. Zelnak Jr. would retire in mid-2010 and that the board had elected C. Howard Nye chief executive officer and president effective January 1, 2010. Nye had joined the company in 2006 as president and chief operating officer after serving as an executive vice president of Hanson Aggregates North America.⁠[4]

His name is also given as Howard Ward Nye, and company releases later refer to him as Ward Nye.⁠[5][6]

On December 12, 2011, the company launched an exchange offer of 0.50 of its shares for each Vulcan Materials CompanyVulcan MaterialsVulcan Materials Company is the largest U.S. supplier of construction aggregates, mainly crushed stone, sand and gravel, and a major producer of asphalt mix and ready-mixed concrete, with Aggregates, Asphalt and Concrete segments. It is headquartered in Birmingham, Alabama.Open the full entry share.⁠[7]

On May 4, 2012, the Delaware Court of Chancery enjoined Martin Marietta for four months from pursuing its $5.5 billion unsolicited attempt to acquire Vulcan.⁠[8]

The Chancery Court found that Martin Marietta had breached a confidentiality agreement signed during friendly merger talks, and on May 31, 2012, the Delaware Supreme Court affirmed the ruling in an expedited appeal.⁠[9]

On June 27, 2014, S&P Dow Jones IndicesS&P Dow Jones IndicesS&P Dow Jones Indices (S&P DJI) is a global index provider that compiles and licenses benchmark indices including the S&P 500 and the Dow Jones Industrial Average. It was formed in 2012 by combining McGraw-Hill’s S&P index business with the Dow Jones Indexes business held by a joint venture of CME Group and Dow Jones, and it is now the index business division of S&P Global, which holds about 73% of the interest.Open the full entry announced that Martin Marietta Materials would replace United States Steel in the S&P 500S&P 500The S&P 500 is a U.S. large-cap equity index compiled by S&P Dow Jones Indices. It includes 500 leading companies, covers about 80% of available market capitalization and is described by S&P DJI as “widely regarded as the best single gauge of large-cap U.S. equities.”Open the full entry after the close of trading on July 1, 2014, in the GICS Materials sector, Construction Materials sub-industry.⁠[10]

On July 2, 2014, the company announced the completion of its acquisition of Texas Industries, Inc. (TXI), adding cement and ready mix concrete assets and greater exposure to the cement markets of Texas and California. Based on the July 1 closing price, the combined company had a market capitalization of about $8.8 billion.⁠[11]

On April 27, 2018, the company closed its $1.625 billion cash acquisition of Bluegrass Materials Company, which operated in Georgia, South Carolina, Maryland, Kentucky and Tennessee. To meet regulatory requirements it divested the Forsyth quarry north of Atlanta and was to divest the Beaver Creek quarry in western Maryland.⁠[12]

On October 1, 2021, the company announced the completion of its $2.3 billion cash acquisition of Lehigh Hanson, Inc.’s West Region business, comprising 17 active aggregates facilities, two cement plants and related distribution terminals, and targeted downstream operations in markets including the Bay Area, Los Angeles, San Diego and Phoenix.⁠[13]

Before April 2024 the company acquired Albert Frei & Sons, Inc. in Colorado.⁠[14]

In February 2024 the company sold its Texas cement and concrete business to CRH for $2.1 billion.⁠[15]

On April 5, 2024, the company completed its $2.05 billion cash acquisition of 20 active aggregates operations in Alabama, South Carolina, South Florida, Tennessee and Virginia from affiliates of Blue Water Industries LLC.⁠[14]

On July 25, 2025, the company acquired Premier Magnesia, a privately owned producer of magnesia-based products, and on August 3 it signed a definitive agreement with Quikrete Holdings, Inc. (QUIKRETE) to exchange assets.⁠[16]

On February 23, 2026, the company announced the completed exchange, receiving aggregates operations producing about 20 million tons a year in Virginia, Missouri, Kansas and Vancouver, British Columbia, plus $450 million in cash, for the Midlothian cement plant, related terminals, Texas ready mixed concrete assets and certain nonoperating land.⁠[17]

As of January 31, 2026, the company had about 9,600 employees, about 7,100 hourly and 2,500 salaried.⁠[18]

On February 11, 2026, the company posted full-year 2025 total revenues of $6,150 million (2024: $5,662 million), net earnings attributable to the company of $1,137 million (2024: $1,995 million) and aggregates shipments of 198.5 million tons.⁠[19]

On June 29, 2026, the company announced a combination with Lhoist North America at an enterprise value of about $13.5 billion, paid with $7.0 billion in cash and company common stock valued at $6.5 billion. Lhoist North America produces high-calcium lime, dolomitic lime and industrial mineral products.⁠[20]

Lhoist North America is a subsidiary of Lhoist Group, and after closing the Berghmans family was expected to own about 15 percent of Martin Marietta on a fully diluted basis.⁠[21]

The combination closed on August 21, 2026, expanding the company’s Specialties platform.⁠[6]

On July 30, 2026, the company posted second-quarter revenues of $1,947 million, up 21%; net earnings from continuing operations attributable to the company of $256 million, down 12%; and record aggregates shipments of 61.6 million tons. It operated in 29 states, Canada and The Bahamas.⁠[22]