Moelis , a New York based boutique investment bank, has won the largest-ever equity advisory mandate for Saudi Aramco’s long anticipated initial public offering, The Financial Times reported Tuesday. Aramco, the world’s largest oil company, has been considering Moelis, founded by Ken Moelis during the 2007 financial crisis, among others including Rothschild and Lazard to advise on the complex deal since September, according to reports.