Some people don't need to spend a lifetime building wealth .

Forbes just dropped its annual Forbes 400 list , which ranks and profiles the richest American billionaires, worth a total of $2.96 trillion. The youngest on the list Evan Spiegel, co-founder of Snapchat is just 29.

And that doesn't include all of the youngest billionaires in the US while Kylie Jenner may be called the youngest self-made billionaire ever, her estimated $1 billion net worth didn't make the cut. In fact, a record 221 American billionaires didn't make the list. The minimum net worth required to make this list is $2.1 billion .

Read more : Meet the world's richest millennials, who have a collective net worth of more than $235 billion

To see how Forbes determined who made the Forbes 400, you can view their full methodology here . We narrowed that list down to look at the 15 youngest, richest billionaires on the list, who are worth a collective $146.9 billion.

All net worths are current estimates as of October 2, 2019. The full list below is ranked by age. In cases where two billionaires are the same age, they are ranked in ascending order of wealth.

See the rest of the story at Business Insider

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