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CHICAGO — 4C Insights has signed a 14,394-square-foot office lease expansion at 1 E. Wacker Drive in Chicago. The data science and media technology firm previously occupied 4,785 square feet in the building. This expansion more than triples the firm’s footprint. Bill Sheehy and Mark Cassata of CBRE represented 4C in the lease transaction. John Beason and Monica Moore of JLL represented the undisclosed landlord.