Simpson Thacher & Bartlett is to advise longstanding client Kohlberg Kravis Roberts & Co (KKR) on the private equity powerhouse’s public offering, reports The American Lawyer.

The transaction is a significant departure from KKR’s original plans, announced a year ago, to raise $1.25bn (£627m) through an initial public offering. Instead, KKR will go public by taking over its Amsterdam-listed investment fund, KKR Private Equity Investors (PEI). After the transaction is completed, shares of KKR will be listed on the New York Stock Exchange. The proposed deal values KKR at a reported $12bn-$15bn (£6bn-£7.5bn).