Private equity firm Thoma Bravo has entered into an agreement to acquire the enterprise software business of imaging company Lexmark International Inc., which is made up of three primary businesses: Kofax, ReadSoft and Perceptive Software. The deal is expected to close in the third quarter of this year. Apex Technology Co Ltd, PAG Asia Capital and Legend Capital Management Co. Ltd, which acquired Lexmark in November, support the sale of the enterprise software business, according to company officials.