5. MARK ZUCKERBERG $51.3B

Mark Elliot Zuckerberg (born May 14, 1984) is an American technology entrepreneur and philanthropist. He is known for co-founding and leading Facebook as its chairman and chief executive officer.Born in White Plains, New York, Zuckerberg attended Harvard University, where he launched Facebook from his dormitory room on February 4, 2004, with college roommates Eduardo Saverin, Andrew McCollum, Dustin Moskovitz, and Chris Hughes. Originally launched to select college campuses, the site expanded rapidly and eventually beyond colleges, reaching one billion users by 2012. Zuckerberg took the company public in May 2012 with majority shares. His net worth is estimated to be US$55.0 billion as of November 30, 2018, declining over the last year with Facebook stock as a whole.Since 2010, Time magazine has named Zuckerberg among the 100 wealthiest and most influential people in the world as a part of its Person of the Year award.In December 2016, Zuckerberg was ranked 10th on Forbes list of The World's Most Powerful People.
Source: Wikipedia
Source: Forbes

4. AMANCIO ORTEGA $58.4B

Amancio Ortega Gaona (born 28 March 1936) is a Spanish billionaire businessman. He is the founder and former chairman of Inditex fashion group, best known for its chain of Zara clothing and accessories shops. As of late September 2018, Ortega had a net worth of $68.2 billion, making him the second-wealthiest person in Europe after Bernard Arnault, and the fifth-wealthiest in the world. Ortega is also the wealthiest retailer in the world
Source: Wikipedia
Source: Frobes

3. WARREN BUFFETT $80.3B

Warren Edward Buffett (born August 30, 1930)is an American business magnate, investor, speaker and philanthropist who serves as the chairman and CEO of Berkshire Hathaway. He is considered one of the most successful investors in the world and has a net worth of US$84.4 billion as of November 1, 2018, making him the third-wealthiest person in the world. Buffett was born in Omaha, Nebraska. He developed an interest in business and investing in his youth, eventually entering the Wharton School of the University of Pennsylvania in 1947 before transferring and graduating from University of Nebraska at the age of 19. He went on to graduate from Columbia Business School, where he molded his investment philosophy around the concept of value investing that was pioneered by Benjamin Graham. He attended New York Institute of Finance to focus his economics background and soon after began various business partnerships, including one with Graham. He created the Buffett Partnership after meeting Charlie Munger, and his firm eventually acquired a textile manufacturing firm called Berkshire Hathaway and assumed its name to create a diversified holding company.
Source: Wikipedia

2. BILL GATES $90 BILLION

William Henry Gates III (born October 28, 1955) is an American business magnate, investor, author, philanthropist, humanitarian, and principal founder of Microsoft Corporation.During his career at Microsoft, Gates held the positions of chairman, CEO and chief software architect, while also being the largest individual shareholder until May 2014. In 1975, Gates and Paul Allen launched Microsoft, which became the world's largest PC software company.Gates led the company as chief executive officer until stepping down in January 2000, but he remained as chairman and created the position of chief software architect for himself.In June 2006, Gates announced that he would be transitioning from full-time work at Microsoft to part-time work and full-time work at the Bill & Melinda Gates Foundation, which was established in 2000.He gradually transferred his duties to Ray Ozzie and Craig Mundie.He stepped down as chairman of Microsoft in February 2014 and assumed a new post as technology adviser to support the newly appointed CEO Satya Nadella.
Source: Wikipedia
Source: Wealthygorilla

1. JEFF BEZOS $138.73B #1

#1 Year 2019 Jeffrey Preston Bezos (born Jeffrey Preston Jorgensen; January 12, 1964) is an American technology entrepreneur, investor, and philanthropist. He is the founder, chairman, and chief executive officer (CEO) of Amazon.Bezos was born in Albuquerque, New Mexico, and raised in Houston, Texas. He graduated from Princeton University in 1986 with degrees in electrical engineering and computer science. He worked on Wall Street in a variety of related fields from 1986 to early 1994. He founded Amazon in late 1994 on a cross-country road trip from New York City to Seattle. The company began as an online bookstore and has expanded to a variety of products and services, including video and audio streaming. It is currently the world's largest online sales company, as well as the world's largest provider of cloud infrastructure services via its Amazon Web Services arm.
Source: Wikipedia
Source: Playback