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Target Markets We have targeted four broad markets that provide a stable base of business growing at or above the rate of GDP along with niches that offer even higher growth potential. Building Materials Oglebay Norton is a major supplier of aggregates used in the construction of airports, stadiums, schools and roads. Our chemical limestone, industrial sands and mica are used as industrial fillers in a wide range of building products, including roofing shingles, carpet backing, joint compound, stucco, grout, paints and wallcoverings. Energy Oglebay Norton is a leading supplier of high-value fracturing sands and other specialized sands that are used by the U.S. oil and gas industry. Our Great Lakes Minerals segment has a growing business transporting coal for power companies in the Great Lakes region. Environmental Lime and chemical limestone supplied by Oglebay Norton are used in almost all aspects of environmental cleanup, including flue gas desulfurization, air and water purification, waste treatment and soil remediation. Our filtration sands are also used in water purification. Industrial/Specialty Oglebay Norton is a supplier of essential minerals to a broad range of industries, including metallurgy, glass, paper, plastics and chemicals. Mica has valued-added applications in plastics, rubber, coatings and other specialty markets.