Castanea Partners has appointed Jeffrey F. Rayport as operating partner. Rayport has over 20 years of executive experience in information and marketing services. Prior to Castanea, he was the founder and chairman of Marketspace, a strategy practice that works with companies to reinvent how they interact with customers and markets.

KKR has appointed Jonathan R. Levin to the newly created position of treasurer and head of investor relations. As treasurer, he will be involved in the oversight of the firm’s balance sheet, including the USD3bn in net assets it is expected to receive as a result of its combination transaction

Global private equity firm The Carlyle Group has appointed Gregory L. Summe as vice chairman of global buyout, a newly created position. He will report to global head of buyout Daniel F. Akerson. Summe comes to Carlyle from Goldman Sachs Capital Partners, where he is a senior adviser. He begins

Kohlberg Kravis Roberts has appointed Lee Stern, previously a managing director at GSO Capital Partners, as a director of the firm responsible for originating and structuring mezzanine investments. Based in New York, Stern joins KKR Asset Management. Henry R. Kravis and George R. Roberts (pictured), co-founders of KKR, said: “With