Martin Marietta Materials, Inc. is an American company and a member of the

S&P 500 Index The Standard and Poor's 500, or simply the S&P 500, is a stock market index tracking the stock performance of 500 large companies listed on stock exchanges in the United States. It is one of the most commonly followed equity indices. As of D ...

. The company is a supplier of aggregates and heavy

building materials Building material is material used for construction. Many naturally occurring substances, such as clay, rocks, sand, wood, and even twigs and leaves, have been used to construct buildings. Apart from naturally occurring materials, many man-ma ...

, with operations spanning 26 states, Canada and the

Caribbean The Caribbean (, ) ( es, El Caribe; french: la Caraïbe; ht, Karayib; nl, De Caraïben) is a region of the Americas that consists of the Caribbean Sea, its islands (some surrounded by the Caribbean Sea and some bordering both the Caribbean Se ...

. In particular, Martin Marietta Materials supplies resources for the construction of roads, sidewalks and foundations. Martin Marietta's Magnesia Specialties business provides a full range of

magnesium oxide Magnesium oxide ( Mg O), or magnesia, is a white hygroscopic solid mineral that occurs naturally as periclase and is a source of magnesium (see also oxide). It has an empirical formula of MgO and consists of a lattice of Mg2+ ions and O2− ions ...

magnesium hydroxide Magnesium hydroxide is the inorganic compound with the chemical formula Mg(OH)2. It occurs in nature as the mineral brucite. It is a white solid with low solubility in water (). Magnesium hydroxide is a common component of antacids, such as milk ...

and dolomitic lime products. The present-day materials business is distantly descended from Superior Stone, an aggregates company founded in 1939 in

Raleigh, North Carolina Raleigh (; ) is the capital city of the state of North Carolina and the List of North Carolina county seats, seat of Wake County, North Carolina, Wake County in the United States. It is the List of municipalities in North Carolina, second-most ...

. In 1959 the company was purchased by the

American-Marietta Corporation The American-Marietta Corporation was an American industrial conglomerate based in Chicago, Illinois, with numerous subsidiary companies across the Continental United States. It specialized in construction materials and industrial chemicals such ...

, which merged with the Glenn L. Martin Company a year later to form

Martin Marietta Corporation The Martin Marietta Corporation was an American company founded in 1961 through the merger of Glenn L. Martin Company and American-Marietta Corporation. In 1995, it merged with Lockheed Corporation to form Lockheed Martin. History Martin M ...

. Martin Marietta in turn merged with

Lockheed Corporation The Lockheed Corporation was an American aerospace manufacturer. Lockheed was founded in 1926 and later merged with Martin Marietta to form Lockheed Martin in 1995. Its founder, Allan Lockheed, had earlier founded the similarly named but ot ...

in 1995, and a year later the "new" Martin Marietta was spun off as independent company, with

Lockheed Martin The Lockheed Martin Corporation is an American aerospace, arms, defense, information security, and technology corporation with worldwide interests. It was formed by the merger of Lockheed Corporation with Martin Marietta in March 1995. It ...

retaining various

aerospace Aerospace is a term used to collectively refer to the atmosphere and outer space. Aerospace activity is very diverse, with a multitude of commercial, industrial and military applications. Aerospace engineering consists of aeronautics and astrona ...

defense Defense or defence may refer to: Tactical, martial, and political acts or groups * Defense (military), forces primarily intended for warfare * Civil defense, the organizing of civilians to deal with emergencies or enemy attacks * Defense industr ...

, and other manufacturing lines of business.

References

External links

*
Martin Marietta Magnesia Specialties
Companies listed on the New York Stock Exchange Manufacturing companies based in North Carolina Chemical companies of the United States Mining companies of the United States Manufacturing companies established in 1993 Companies based in Raleigh, North Carolina Building materials companies of the United States Corporate spin-offs {{NorthCarolina-stub