Ivanhoé Cambridge, Hines and McCaffery, global real estate firms, today announced Xcel Energy-Colorado has pre-leased the entirety of office space at T3 RiNo, the new six-story, mass timber office building in Denver’s River North Arts District (RiNo). Xcel Energy will be the largest office tenant in the RiNo submarket upon relocating to its new 220,172 square-foot regional headquarters at T3 RiNo.