Riley Resource Group, whose companies include 27-year-old Feed Energy and startups FEC Solutions and Decision Innovation Solutions, has begun renovations on its new headquarters building in the former Lakeside Fitness Center at 4400 E. University Ave. in Pleasant Hill. Riley Resource Group plans to move into the building, which will feature collaborative work spaces, in August, with about 30 of its more than 100 workers making the initial move from company offices on Dean Avenue in Des Moines.