The London-based publisher and content provider is looking to expand its catalogue of around 2,800 events with the purchase of IIR's 1,400-strong portfolio of global conferences and exhibitions.
T&F Informa chief executive Peter Rigby said: "The acquisition of IIR will significantly extend our events business. We know the IIR products well and the business will complement our existing portfolio both geographically and by sector."
As Event went to press both parties were anticipating an EGM that would approve the acquisition. The deal is expected to be completed by the end of July.