Martin Marietta Materials, Inc. operates in the Crushed and broken limestone sector. Martin Marietta Materials, Inc. is a producer of aggregates for the construction industry, including infrastructure, agricultural, nonresidential, and residential. The Company also has a manufactures and markets magnesia-based chemical products used in industrial, agricultural, and environmental applications and dolomitic lime sold primarily to customers in the steel industry. The Company operates in four business segments: the Mideast Group, Southeast Group, and West Group, collectively the Aggregates business, and the Specialty Products segment. During the year ended December 31, 2010, its Aggregates business accounted for 89% of the Company's total net sales, and the Company's Specialty Products segment accounted for 11% of the Company's total net sales. During 2010, the Company acquired a deep-water port facility in Port Canaveral, Florida. In our complete report available for purchase the company is compared to: Vulcan Materials Company, Toll Brothers, Inc. and KB Home.