Billionaires whose wealth increased the most in 2012

The richest 100 billionaires added $241 billion to their wealth this past year, according to Bloomberg. As a whole they're worth $1.9 trillion.

Let's take a look at 10 billionaires whose net worth rose the most in 2012.

Source: Business Insider

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Amancio Ortega

Net worth: $57.5 billion

How much he gained in 2012: $22.2 billion

What he does: Head of Spanish clothing retailer Inditex, which owns Zara.

Global rank: 1

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Carlos Slim

Net worth: $22.2 billion

How much he gained in 2012: $13.4 billion

What he does: Mexican telecom magnate

Global rank: 2

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Alwaleed bin Talal

Net worth: $28.7 billion

How much he gained in 2012: $11.3 billion

What he does: Uber-rich Saudi billionaire investor

Global rank: 3

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Bernard Arnault

Net worth: $28.8 billion

How much he gained in 2012: $8.1 billion

What he does: Europe's richest man and chairman of luxury goods company LVMH

Global rank: 4

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Charles Koch

Net worth: $40.9 billion

How much he gained in 2012: $7.1 billion

What he does: Co-founder of Koch Industries

Global rank: 5

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David Koch

Net worth: $40.9 billion

How much he gained in 2012: $7.1 billion

What he does: Co-founder of Koch Industries

Global rank: 6

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Lee Shau Kee

Net worth: $23.7 billion

How much he gained in 2012: $7.1 billion

What he does: Hong Kong property tycoon

Global rank: 7

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Bill Gates

Net worth: $62.7 billion

How much he gained in 2012: $7 billion

What he does: Microsoft founder and Chairman

Global rank: 8

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Jeff Bezos

Net worth: $23.6 billion

How much he gained in 2012: $6.9 billion

What he does: Amazon CEO and founder

Global rank: 9

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Rinat Akhmetov

Net worth: $21.2 billion

How much he gained in 2012: $6.8 billion

What he does: Investments in natural resources

Global rank: 10