Fortistar Capital has leased 18,266 s/f at the Gateway Building. The firm is moving its headquarters from the 5th and 6th floors to expanded space on the 14th floor. The CBRE agency team of William Cuddy, executive VP, and Jacqueline Novotny, associate represented ownership, Gateway I Group. Located one block from the White Plains Metro North Station and the Bronx River Pkwy., One North Lexington Ave. totals 532,336 s/f. Fortistar, which invests in and manages power assets, was represented by Howard Greenberg, SIOR, president of Howard Properties.