A team of Ballard Spahr attorneys served as advisers to the Harleysville Group and Harleysville Mutual Insurance in their sale to Nationwide Mutual Insurance for $1.6 billion. Harleysville, based in Harleysville, Pennsylvania, specializes in providing insurance for small and midsize businesses in 32 states. Last year, it reported $66.9 million in net profit on revenue of $986.3 million.