The world's 10 richest people added $402 billion to their collective net worth in 2021, making it a banner year for the ultra-wealthy.
As the year came to an end, Tesla CEO Elon Musk was the biggest winner, adding $121 billion to his fortune, which is now the largest in the world at $277 billion, according to the Bloomberg Billionaires Index.
Amazon founder Jeff Bezos, who started the year in the top spot, sank to number two, adding a mere $4.54 billion to his net worth, which now stands at $195 billion.
After Musk, French billionaire Bernard Arnault, the founder of luxury goods company LVMH and currently the third richest man in the world, had the largest gains for the year, adding $61.3 billion to his fortune.
For Musk, it was an eventful year, marked by a hosting appearance on Saturday Night Live, a break-up with girlfriend Grimes, and his self-coronation as 'Technoking' of Tesla.
Musk made huge waves last month as he sold off many billions worth of his Tesla stock in a move purportedly dictated by a poll he posted on Twitter.
In reality, at least some of the stock sales were driven by mandatory taxes as he exercised stock options that will expire in August.
He has sold $16.4 billion worth of shares since early November when he said he would sell 10 percent of his Tesla stock if Twitter users agreed, which they did.
But Musk in September had set up a prearranged plan for stock sales related to options expiring next year, and Tesla in a filing on Tuesday said the program was complete.
Musk said last week that he would be done selling shares after his programmed sales ended, meaning that the selloff is now complete.
Google co-founders Larry Page and Sergey Brin added $47.4 billion and $45.1 billion to their net worths respectively.
Facebook CEO Mark Zuckerberg gained $24.3 billion for the year, bringing his total to $128 billion, though his fortunes have declined as Facebook stock is down 9 percent since a whistleblower leaked damaging documents this fall.
Former Microsoft CEO Steve Ballmer gained $41.2 billion in 2021, and Warren Buffett added $21.4 billion.
Larry Ellison, the executive chairman of Oracle, added $28.8 billion to his wealth.
For most of the world's wealthiest, the vast majority of their net worth is in stock, and their gains have been driven by booming markets.
As 2021 draws to a close, the main U.S. stock indexes are on pace for their third straight year of stunning annual returns, boosted by historic fiscal and monetary stimulus.
The S&P 500 is looking at its strongest three-year performance since 1999.
GAINS FOR THE 10 WEALTHIEST PEOPLE IN 2021 (*Total)
1. Elon Musk – $121 Billion
2. Jeff Bezos – $4.54 Billion
3. Bernard Arnault – $61.3 Billion
4. Bill Gates – $7.13 Billion
5. Larry Page – $47.4 Billion
6. Mark Zuckerberg – $24.3 Billion
7. Sergey Brin – $45.1 Billion
8. Steve Ballmer – $41.2 Billion
9. Warren Buffett – $21.4 Billion
10. Larry Ellison – $28.8 Billion