The Ferrara announcement confirms a Tribune story in November that the maker of candy brands like Nerds and Lemonheads was negotiating to take space in the 2.8 million-square-foot building. So far, its only neighbor in the building at 433 W. Van Buren St., will be Walgreens, which earlier this year announced plans to move 1,800 employees there in 2019, most of them from its Deerfield headquarters.