AK Steel executive retires

One of AK Steel's top executives who has been serving the company for nearly 15 years will retire at the end of May. David Horn, executive vice president, chief legal and administrative officer and secretary, will retire from AK Steel effective May 31. Horn joined AK Steel (NYSE: AKS) as assistant general counsel in 2000. He advanced to vice president and general counsel in 2001 and was elected corporate secretary in 2003. He became senior vice president, general counsel and secretary in 2005 and…