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CHICAGO — Chicago Trading Co. (CTC) has signed a 114,186-square-foot office lease renewal and expansion at 425 Financial Place in Chicago. CTC, a derivatives trading firm, has expanded its lease by 26,768 square feet. Mark Keebler and Brad Serot of CBRE represented CTC in the lease transaction. Mike Curran of JLL represented the undisclosed landlord. Owner CIM Group has committed to investing significantly in the property, formerly known as 440 S. LaSalle St., to upgrade amenities and improve common areas.