It said today it had instructed Knight Frank and Cushman & Wakefield to market floors 22 to 24 totalling 87,000 sq ft. The quoting rent has not been revealed. The space will be available for occupation by the middle of next year.
A Citi spokesman said it was part of its ongoing effort to maximize its real estate use.
Other occupiers of the tower include SunGard, Instinet, Think London, Hatfield Philips, Wells Fargo, AEG, Munich Re and MWB.