The ranks of the world's richest people are peppered with hedge fund managers, private equity investors, money managers and all kinds of investment industry entrepreneurs. Hedge fund pioneers George Soros, Ray Dalio and James Simons stand out among the world's 50 richest people in any industry, each boasting a fortune greater than $15 billion, according to the most recent Forbes billionaires list, published on March 1, 2016. Several spots behind, at number 65, is Abigail Johnson, chief executive officer (CEO) of mutual fund giant Fidelity Investments. She is the top mutual fund executive on the list, with a net worth of $13.1 billion.

Other mutual fund company executives, past and present, appear further down the list, including Charles B. Johnson, former CEO of mutual fund firm Franklin Resources Inc. (NYSE: BEN), better known as Franklin Templeton Investments. Johnson built a fortune of $5.4 billion managing his firm and many of its mutual funds over the course of five decades. While no active mutual fund portfolio managers appear high on the Forbes list, a handful have managed to rise into the lower ranks of the billionaire's club, which is no small feat. The following offers a brief look at several of these billionaire mutual fund managers.

Charles H. Brandes

Charles H. Brandes is founder and chairman of Brandes Investment Partners LP, a San Diego-based asset manager dedicated to the value investing philosophy articulated by Benjamin Graham and others. Brandes started his company not long after a chance encounter with Graham, and went on to build an investment operation with $27 billion in assets under management (AUM), as of March 31, 2016. Brandes has built a personal fortune of nearly $1.2 billion, according to Forbes.

Brandes Investment Partners offers institutional and individual investors a menu of more than 15 investment strategies covering equities and fixed-income investments. As of April 2016, Brandes actively served as a portfolio manager on the company's Global Opportunities Value Fund ("BGOAX"), a value-focused multi-cap equities fund. He also exercises oversight of fund management as a member of the firm's all-cap investment committee and its investment oversight committee.

Mario J. Gabelli

Mario J. Gabelli is founder, CEO and chairman of Gamco Investors Inc. (NYSE: GBL), an asset management and financial services firm based in New York. Gabelli completed his undergraduate degree in business at Fordham University before going on to earn an MBA at Columbia University. He founded Gamco in 1976 as an investment research and advisory firm focused on bottom-up investing principles. As of April 2016, Gamco had a market capitalization of nearly $1.2 billion. Gabelli has a net worth of $1.4 billion, according to Forbes.

Gamco and its subsidiaries offer more than 20 mutual funds covering equities across a range of investment styles and market capitalizations. The firm also offers investment vehicles for institutional and high-net worth investors. It has $38.7 billion in AUM, including $37.1 billion in equity investments. As of April 2016, Gabelli serves as portfolio manager on a variety of open-end and closed-end funds offered by Gamco subsidiary Gabelli Funds LLC, including his first mutual fund, the Gabelli Asset Fund ("GABAX"), which was launched in March 1986.

Fayez Sarofim

Fayez Sarofim is founder, chairman and co-chief investment officer of Fayez Sarofim & Co., a privately held asset management firm with $30 billion in AUM, as of 2015. Born in Egypt, Sarofim earned a bachelor's degree from the University of California at Berkeley before going on to Harvard University to complete an MBA. He established Fayez Sarofim & Co. in Texas in 1958. He has a net worth of $1.4 billion, according to Forbes.

As of April 2016, Fayez Sarofim & Co. offers a handful of investment strategies for institutional and high net worth individuals, including large-cap equity and global equity strategies, a core fixed-income strategy and a balanced portfolio strategy. The firm also acts as a mutual-fund subadvisor on the Dreyfus Appreciation Fund ("DGAGX") and the Dreyfus Worldwide Growth Fund ("PGROX"). Fayez Sarofim has served as portfolio manager of these two funds since December 1990 and July 1993, respectively.

Want to learn how to invest?

Get a free 10 week email series that will teach you how to start investing.

Delivered twice a week, straight to your inbox.