A partner and top client services and business development executive at Chicago investment firm LSV Asset Management is the buyer who paid $21.85 million in August for a 10-bedroom, 20,000-square-foot waterfront estate on Geneva Lake in Lake Geneva, Wis. James W. Owens Jr., who also owns a home in Elmhurst, bought the historic estate on 12.78 acres in Lake Geneva, according to real estate sources in Lake Geneva.