The top executive of IntercontinentalExchange said he expected the company's acquisition of NYSE Euronext to receive regulatory approvals within days, the final steps toward closing the mega-exchange deal.

ICE chief executive Jeffrey Sprecher said Tuesday on a quarterly-earnings conference call that he expected the remaining approvals "in the coming days" and said that ICE intended to host a separate conference call to discuss plans for integrating NYSE into ICE's operations after the transactions closes.