Kohlberg Kravis Roberts will push ahead with the listing of its listed private equity business in New York, despite the departure of one of the key figures overseeing the deal, who resigned today citing personal reasons including a lack of time.

Gérard Lamarche, chief financial officer at French energy group GDF Suez, has stepped down from his role as a director on the board of KKR Private Equity, the listed vehicle of the US buyout group, which he joined in June 2007.