William Macaulay is the CEO and Chairman of First Reserve Corporation and he has an estimated net worth of $1.1 billion as of March 2013. In the “Forbes 400” list, he was the #392 richest person and on the list of World Billionaires, he is ranked 1268th. He was ranked 1075th in 2012. He was the 408th richest person in the United States and one of the richest people in Connecticut.

First Reserve Corporation was founded in 1983 and Macaulay has been with the firm since then. He was the one responsible in supervising all aspects of the investment programs and strategies as well as the overall management of the firm. Today, it is the world’s largest Private Equity fund specialized in the energy industry. Currently, it has $21.5 billion in assets under management. It now holds 41 portfolio companies with $200 billion in revenues.

Before his career with First Reserve Corporation, William Macaulay was a co-founder of a private equity buyout firm, Meridien Capital Company. He was with Oppenheimer & Co., Inc. from 1972 to 1982 and served as Director of Corporate Finance. He was responsible for investing its capital in private equity transactions. He also served as a General Partner and member of the Management Committee of Oppenheimer Energy Corporation. He was the founder and the largest stockholder of Peppermill Oil Company.