Kohlberg Kravis Roberts has agreed to acquire Alliant Insurance Services from The Blackstone Group. Blackstone acquired majority control of the company in 2007 in partnership with Alliant's management and employees, who currently own approximately 45% of the company and will roll over a substantial portion of their investment in the transaction. Alliant is an insurance broker that provides property and casualty insurance, workers' compensation, employee benefits, surety, and financial products and services to some 20,000 clients nationwide.