Rank Name Net Worth Age Country of Citizenship Source of wealth
Image result for Bill Gates

No #1

Bill Gates

$86 Billion

61

United States

Microsoft

Image result for Warren Buffett

No #2

Warren Buffett

$75.6 Billion

86

United States

Berkshire Hathaway 

Image result for Jeff Bezos

No #3

Jeff Bezos

$72.8 Billion

53

United States

Amazon.com 

Image result for Amancio Ortega

No #4

Amancio Ortega

$71.3 Billion

81

Spain

 Zara

Image result for Mark Zuckerberg

No #5

Mark Zuckerberg

$56 Billion

33

United States

Facebook 

Image result for Carlos Slim Helu

No #6

Carlos Slim Helu

$54.5 Billion

77

Mexico

América Móvil, Grupo Carso

Image result for Larry Ellison

No #7

Larry Ellison

$52.2 Billion

72

United States

Oracle Corporation

Image result for Charles Koch

No #8

Charles Koch

$48.3 Billion

81

United States

Koch Industries

Image result for David Koch

No #9

David Koch

$48.3 Billion

77

United States

Koch Industries

Image result for Michael Bloomberg

No #10

Michael Bloomberg

$47.5 Billion

75

United States

 Bloomberg LP 

Credit Wikipedia..