The annual Oxfam International report says the world's 62 richest people have the same amount of wealth as the bottom 50 percent of the world. For comparison, it took 80 billionaires last year to make up half the world's wealth. Further back in 2010, that number was 388.
According to the report, there's been a drastic change of the rich getting richer and the poor getting poorer.
"The world has become a much more unequal place and the trend is accelerating."
Winnie Byanyima, Oxfam International Executive Director
Since 2010, the wealth of the world's poorest has dropped by about $1 trillion, or 41 percent. The wealthiest have seen their riches rise by about $540 billion in that same time frame.
Oxfam's executive director said, "World leaders' concern about the escalating inequality crisis has so far not translated into concrete action -- the world has become a much more unequal place and the trend is accelerating."
See more of the 10 richest people in the U.S.:
Forbes' top 10 richest people in America
The world's richest 62 people are as wealthy as the poorest 50 percent
5. Charles Koch
Net worth: $41 billion, down $1 billion
Net worth down 2% since 2014 Forbes 400 due to market pressure on commodities and industrial companies
Charles runs $15 billion (revenues) Koch Industries, the country’s second-largest private company with $115 billion in sales.
He’s been chairman since 1967, when the company was valued at $50 million; it is now worth an estimated $100 billion
Political heavyweight compares his crusade for smaller government and economic liberty to the campaign for civil rights, and hopes his network of several hundred wealthy conservatives will spend up to $300 million on candidates and another $600 million on efforts to reduce regulation and reform the criminal justice system
(Photo by Patrick T. Fallon for The Washington Post via Getty Images)
4. Jeff Bezos
Net worth: $47 billion, up $16.5 billion
Bezos is the biggest dollar-gainer on the list
Climbs into the top 10 richest on The Forbes 400 for the first time thanks to surge in Amazon.com shares
In September he announced that his aerospace company, Blue Origin, would spend over $200 million to build reusable rockets and launch them into orbit from a site at Cape Canaveral by the end of the decade.
(Photo by Nicole Craine/WireImage)
3. Larry Ellison
Net worth: $47.5 billion, down $2.5 billion
Fortune down $2.5 billion in the past year as Oracle’s share price fell
His net worth is down 5% since 2014 Forbes 400
Stepped down as CEO of Oracle in September 2014, stayed on as chairman.
In June he announced that Oracle would expand its cloud-computing business, putting it in direct competition with Amazon.com’s Web Services business.
Both of his children are Hollywood moguls. Daughter Megan has financed films like Zero Dark Thirty and American Hustle. Son David has produced franchises like The Terminator and Mission: Impossible.
(Photo by Gregg DeGuire/WireImage)
2. Warren Buffett
Net worth: $62 billion, down $5 billion
Source: Berkshire Hathaway
Fortune down $5 billion in the past year because share price of Berkshire Hathaway fell
His net worth is down 7.5% since 2014 Forbes 400
Berkshire Hathaway in August announced its biggest acquisition ever, agreeing to pay $37 billion for Precision Castparts, a maker of aerospace, power and industrial parts
In addition to Precision, Berkshire owns companies including Geico, Dairy Queen and Fruit of the Loom
This year teamed up again with 3G Capital, a firm run by a trio of Brazilian billionaires, to merge Kraft Foods with Heinz. Buffett has joined forces last year to help finance 3G’s merger of Burger King and coffeehouse chain Tim Hortons
Lifetime philanthropic giving: $25.6 billion
(Photo by Eric Frances/Getty Images)
1. Bill Gates
Net worth: $76 billion, down $5 billion
World’s richest man for 22nd year in a row
Fortune down 6%
Gates own just under 3% of Microsoft, which accounts for 13% of his total fortune. His private investment firm, Cascade, makes up the rest, investing in stocks, bonds, private equity and real estate
Lifetime philanthropic giving: $31.5 billion
(Photo by J. Countess/WireImage)
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The report from Oxfam, a worldwide anti-poverty group, was intentionally released shortly before the World Economic Forum in Davos, Switzerland, where some of the world's wealthiest businesspeople and most powerful politicians will gather to discuss solutions to world poverty.