Martin Marietta Materials (MLM) will raise its quarterly dividend by 25.5 percent to $0.345 per share in 2007. The next dividend will be paid on September 28, 2007 to shareholders of record on August 31, 2007. Martin Marietta has paid a dividend every year since it became a public company in 1994.

Martin Marietta Materials, Inc. is a supplier of supplier of building materials, including aggregates, cement, ready mixed concrete and asphalt. Martin Marietta’s Magnesia Specialties business provides a full range of magnesium oxide, magnesium hydroxide and dolomitic lime products. The company has operations in the United States, Canada and The Bahamas.