It has been a terrible year for many, but the good times keep on rolling for the nation’s richest. The 400 wealthiest Americans saw their collective fortune increase 40% over the last year, to $4.5 trillion. Nearly all are richer than they were a year ago. There are 44 new names on the list, which now requires a minimum net worth of $2.9 billion, up $800 million from a year ago. What hasn’t increased? Their generosity. The number of Forbes 400 members who gave away more than 20% of their net worth since last year’s list dropped from ten to eight, while those who gave away less than 1% of their wealth rose from 127 to 156.

Here's a look at the top 10 richest Americans since 2010.

Read the full story on Forbes: www.forbes.com/400/

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