JP Morgan is the "lead left" manager for the offering, and is joined by Citigroup and Credit Suisse as joint book-running managers.
Here's the link to The Carlyle Group's press release: http://www.carlyle.com/Media%20Room/News%20Archive/2012/item12218.html
Here's a link to the latest S-1/A registration statement on file with the SEC: http://www.sec.gov/Archives/edgar/data/1527166/000095012312005979/x83442a7sv1za.htm