Genstar Capital and Aquiline Capital Partners have completed the acquisition of Ascensus, the largest independent service provider of retirement and college savings plans in the U.S., from J.C. Flowers & Co. Founded more than 30 years ago, Ascensus offers a suite of defined contribution and defined benefit retirement plan solutions, benefits education, college savings plan recordkeeping, and IRA and health savings account administration. J.C. Flowers backed the company in 2007 and had attempted to sell it in 2012. Reports earlier this year indicated the firm was looking for a deal of up to $1 billion.