6 Andrew W. Mellon 188.8 United States Gulf Oil

7 Henry Ford 188.1 United States Ford Motor Company

8 Marcus Licinius Crassus 169.8 Roman Republic Roman Senate

9 Basil II 169.4 Byzantine Empire Monarchy

10 Cornelius Vanderbilt 167.4 United States New York and Harlem Railroad

11 Alanus Rufus 166.9 England Investments

12 Amenophis III 155.2 Ancient Egypt Pharaoh

13 William de Warenne, 1st Earl of Surrey 153.6 England Earl of Surrey

14 William II of England 151.7 England Monarchy

15 Elizabeth I 142.9 England House of Tudor

16 John D. Rockefeller Jr. 141.4 United States Standard Oil

17 Sam Walton 128.0 United States Wal-Mart

18 John Jacob Astor 115.0 Germany American Fur Company

19 Odo of Bayeux 110.2 England Monarchy

20 Stephen Girard 99.5 France First Bank of the United States

21 Cleopatra 95.8 Ancient Egypt Ptolemaic Inheritance

22 Stephen Van Rensselaer III 88.8 United States Rensselaerswyck Estate

23 Richard B. Mellon 86.3 United States Gulf Oil

24 Alexander Turney Stewart 84.7 Ireland Long Island Rail Road

25 William Backhouse Astor Jr. 84.7 United States Inheritance

26 Don Simon Iturbi Patino 81.2 Bolivia Huanuni tin mine

27 Sultan Hassanal Bolkiah 80.7 Brunei Kral

28 Frederick Weyerhaeuser 80.4 Germany Weyerhaeuser Corporation

29 Moses Taylor 79.3 United States Citibank

30 Vincent Astor 73.9 United States Inheritance

31 Carlos Slim Helu 72.4 Mexico Telmex

32 T. V. Soong 67.8 China Central Bank of China

33 Jay Gould 67.1 United States Union Pacific

34 Marshall Field 66.3 United States Marshall Field and Company

35 George F. Baker 63.6 United States Central Railroad of New Jersey

36 Hetty Green 58.8 United States Seaboard National Bank

37 Bill Gates 58.0 United States Microsoft

38 Lawrence Joseph Ellison 58.0 United States Oracle Corporation

39 Richard Arkwright 56.2 England Derwent Valley Mills

40 Mukesh Ambani 55.8 India Reliance Industries

41 Warren Buffett 52.4 United States Berkshire Hathaway

42 Lakshmi Mittal 51.0 India Mittal Steel Company

43 J. Paul Getty 50.1 United States Getty Oil Company

44 James G. Fair 47.2 United States Consolidated Virginia Mining Company

45 William Weightman 46.1 United States Merck & Company

46 Russell Sage 45.1 United States Western Union

47 John Blair 45.1 United States Union Pacific

48 Anil Ambani 45.0 India Reliance Communications

49 Leland Stanford 44.9 United States Central Pacific Railroad

50 Howard Hughes Jr. 43.4 United States Hughes Tool Company, Hughes Aircraft Company, Summa Corporation, TWA

51 Cyrus Curtis 43.2 United States Curtis Publishing Company

52 John Insley Blair 42.4 United States Delaware, Lackawanna and Western Railroad

53 Edward Henry Harriman 40.9 United States Union Pacific Railroad

54 Henry H. Rogers 40.9 United States Standard Oil Company

55 Paul Allen 40.0 United States Microsoft, Vulcan Inc.