AK Steel Corporation is an American steel company whose predecessor, Armco, was founded in 1899 in Middletown, Ohio. Today, the company's corporate headquarters is situated in West Chester, Ohio, after having moved from Middletown, Ohio, in August 2007. The company derives its name from the first letter of Armco and Kawasaki Steel Corporation which entered into a limited partnership with Armco in 1989 with the company formally being renamed AK Steel in 1993 when it became a publicly traded company. The company was founded in 1899 as The American Rolling Mill Company in Middletown, Ohio, and... operated the Middletown Works there. In 1910 it opened the Ashland Works in Ashland, Kentucky. In 1948 it adopted the ARMCO name which in turn became Armco Steel Corporation. The Middletown and Ashland were the company's only plants until the 1950s when it began buying more mills and diversifying. In 1978 it was renamed Armco, Inc. and it moved its headquarters for a now diversified company to New Jersey in 1985.
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| NYSE symbol: | AKS |
| Founded: | 1900 |
| Headquarters: | West Chester Township, Ohio |
| Legal structure: | Public company |
| Annual revenue: | $7,644,300,000 |
| Net income: | $4,000,000 |
| Operating income: | $28,000,000 |
| Market cap: | $5,100,000,000 |
| Industries: | Steel Works, Blast Furnaces (Including Coke Ovens), and Rolling Mills, Steel, Steelmaking |