The overall net worth of the Forbes's list of the 400 richest Americans fell by $300bn in the past year, with Microsoft stalwarts Bill Gates, Paul Allen and Steve Ballmer among the biggest losers.
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Bill Gates lost the most, with his net worth dropping $7bn. However, Bill Gates is still at the top of the list for the 16th consecutive year with $50bn.
Paul Allen, at 17th position, lost $4.5bn and Steve Ballmer, at number 14, gave up $1.7bn.
Other losers in the technology sector include Michael Dell, down $2.8bn at number 13, and SAS's James Goodnight, down $1.9bn at number 33.
Apple's Steve Jobs lost only $600m and his $5.1bn net worth shot him up the Forbes list 18 places to number 43.
|The 12 richest in the technology sector|
|1) Bill Gates, Microsoft: $50bn, down $7bn|
|3) Larry Ellison, Oracle: $27bn, no change|
|11) Sergey Brin, Google: $15.3bn, down $600m|
|11) Larry Page, Google: $15.3bn, down $500m|
|13) Michael Dell, Dell: $14.5bn, down $2.8bn|
|14) Steve Ballmer, Microsoft: $13.3bn, down $1.7bn|
|17) Paul Allen, Microsoft: $11.5bn, down $4.5bn|
|28) Jeff Bezos, Amazon: $8.8bn, up $100m|
|33) James Goodnight, SAS Institute: $6.8bn, down $1.9bn|
|40) Pierre Omidyar, eBay: $5.5bn, down $800m|
|40) Eric Schmidt, Google: $5.5bn, down $400m|
43) Steve Jobs, Apple, Pixar: $5.1bn, down $600m