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Steel Dynamics Inc operates scrap-based steel minimills with roughly 16 million tons of annual steel production capacity. The company's segment includes steel operations, metals recycling operations, steel fabrication operations, Aluminum Operations Segment, and others. It generates maximum revenue from the steel operations segment.
Markel's primary business is property and casualty insurance, and the company focuses primarily on specialty lines, ranging from areas such as executive liability to commercial equine insurance. The acquisition of Alterra in 2013 added substantial reinsurance operations, which now account for a little less than 15% of premiums. The company uses capital generated by its insurance operations to buy noninsurance operations in diverse areas, such as bakery equipment manufacturing and residential homebuilding.