He may not have won Tuesday’s Mega Millions jackpot, but Warren Buffett probably doesn’t care.

The investing genius made an eye-popping $37 million a day in 2013 – that’s $1.5 million an hour – simply watching the shares in his conglomerate soar by more than 25 per cent.

The Berkshire Hathaway boss’ net worth bounced $12.7 billion to $59.1 billion over the period, making him the billionaire who made the most cash this year, according to a new survey.

Battling it out: Warren Buffett, left, made $37million a day in 2013 – that’s $1.5million an HOUR – bringing his eye-popping net worth to $59billion but Bill Gates, right, still tops the list of the world’s richest people

But even with his staggering money-making, Buffett, who lives a notoriously humble existence despite his billions, only came second on the list of the world’s Top 10 richest people, compiled by Wealth-X.

Microsoft founder and chairman Bill Gates took the top spot for another year, with a total net worth of $72.6 billion, up from $61.1 billion in 2012.

Gates’ impressive gain saw him come second to Buffett in the gains stakes, and in third place was casino mogul Sheldon Adelson, who’s worth an estimated $35.3 billion this year after raking in $11.4 billion from his gambling houses in Las Vegas, Macau and Singapore.

Big year: Amazon’s Jeff Bezos’s $11.3 billion in earnings snatched him fourth place while Facebook co-founder Mark Zuckerberg added $10.5 billion to make up a now staggering $24.7 billion net worth and take fifth spot

Silicon Valley took four of the next five slots on the biggest gains list with Amazon’s Jeff Bezos’s $11.3 billion in earnings snatching him fourth place.

His net worth now sits at $35.3 billion, according to Wealth-X.

Facebook co-founder Mark Zuckerberg added $10.5 billion to make up a now staggering $24.7 billion net worth and take fifth spot.

Meanwhile, Google founders Sergey Brin and Larry Page took seventh and eighth place with equal gains of $9.3 billion bringing their total fortunes to $30 billion and $29.9 billion respectively.

The remaining billionaires on the men-only money made list include Japanese businessman Masayoshi Son, who took sixth place, Lui Chee Woo, the Chinese chairman of K. Wah Group, which owns Galaxy Entertainment, who took ninth.

Closing off the list of biggest gainers was New York investor Carl Icahn.

Google gainers: Google founders Sergey Brin, left, and Larry Page, right took seventh and eighth place with equal gains of $9.3 billion bringing their total fortunes to $30 billion and $29.9 billion respectively

According to Wealth-X, the top 10 collectively gained $101.8 billion in 2013, an average gain of $10.2 billion each.

The combined wealth of the 10 individuals now totals a gob-smacking $347 billion, up from $245 billion in January 2013.

Per day, they made $29 million on average, and increased their wealth by 41.6 per cent, outperforming the 24 per cent returns seen in the S&P 500.