NEW YORK (TheStreet) -- Friday wasn't a great day in terms of wealth creation for the world's richest billionaires. This "Black Monday" isn't looking good either.

U.S. stocks are plummeting once again on the fourth consecutive day of triple-digit declines for the Dow Jones Industrial Average as investors react to China's stock market plunge.

Last week, the world's 400 richest, according to the Bloomberg Billionaires Index, lost a collective $182 billion. It was the biggest drop for those on the list since September 2014. On Friday alone, when the Dow dropped more than 500 points, the billionaires lost a combined $76 billion, with the 10 richest losing a collective $14 billion. Monday's market plunge is sure to wreak further havoc on their portfolios.

Here's what happened to the portfolios of the 10 richest men in the world on Friday.


10. Mark Zuckerberg
Facebook (FB) - Get Report
Net Worth: $37.8 billion
Net Change on Friday: -$1.9 billion, -4.9%
YTD Change: $3.3 billion, 9.6%

Image placeholder title

Mark Zuckerberg, 31, is co-founder and CEO of social media giant Facebook. He is Bloomberg's tenth wealthiest billionaire.

The majority of Zuck's fortune comes from his 15% stake in Facebook, which has risen 126% since its IPO in May 2012. Bloomberg also estimates that Zuckerberg's real estate holdings are valued at $175 million, through several homes in Silicon Valley and 700 acres of land in Hawaii.


9. Ingvar Kamprad
Ikea
Net Worth: $41.2 billion
Net Change on Friday: -$679.8 million, -4.9%
YTD Change: -$3.8 billion, -8.4%

Image placeholder title

Ingvar Kamprad is the richest man in Sweden and Bloomberg's ninth richest man in the world. Kamprad, 89, is the founder of ready-to-assemble furniture store Ikea, which had 314 stores worldwide in 2014.

His biggest holdings is his stake in Ikea, which is held through a series of trusts and foundations.

Image placeholder title

8. Larry Ellison
Oracle (ORCL) - Get Report
Net Worth: $41.5 billion
Net Change on Friday: -$1.1 billion, -2.5%
YTD Change: -$7.3 billion, -15%

Larry Ellison is co-founder, chairman and the chief technology officer of Oracle. Ellison, 71, is also the company's largest shareholder (owning approximately 25%) and derives a majority of his wealth from the software giant. Ellison also owns stakes in NetSuite (N) and LeapFrog Enterprises (LF) as well as a hefty real estate portfolio.

Ellison lives a life of luxury, owning yachts, planes and trophy properties all funded by dividends and stocks sales of Oracle shares, according to Bloomberg.


7. Jeff Bezos
Amazon.com (AMZN) - Get Report
Net Worth: $44.2 billion
Net Change on Friday: -$1.8 billion, -3.9%
YTD Change: $15.6 billion, 54.5%

Image placeholder title

Jeff Bezos is founder, chairman and the largest shareholder of the world's largest online retailing giant, Amazon.com. Bezos, 51, owns 18% of Amazon. Bloomberg says that since Amazon's 1997 IPO, Bezos has sold stock valued at more than $3 billion.

In 2013, he purchased the Washington Post newspaper for $250 million.


6. David Koch
Koch Industries
Net Worth: $50.6 billion
Net Change on Friday: -$1.3 billion, -2.5%
YTD Change: $245.4 million, 0.5%

Image placeholder title

David Koch, 75, is executive vice president of Koch Industries, the second largest privately held company in the U.S., and ranked sixth on Bloomberg's billionaire list. Koch Industries, based in Wichita, Kan., is a conglomerate with businesses in oil refining, pipelines, commodities trading, ranching and paper pulp. David Koch and his brother Charles (No. 5 on Bloomberg's list) each own 42% of the company.

While David Koch's wealth is derived from his stake in Koch Industries, the company's most valuable asset is Georgia-Pacific, a producer of paper and pulp, according to Bloomberg.

The Koch brother's cash investments includes stakes in at least 20 publicly-traded companies were valued at $378 million as of July 2015.

Image placeholder title

5. Charles Koch
Koch Industries
Net Worth: $50.6 billion
Net Change on Friday: -$1.3 billion, -2.5%
YTD Change: $245.4 million, 0.5%

Charles Koch, 79, is chairman and CEO of Koch Industries, the second largest privately held company in the U.S., and ranked fifth on Bloomberg's billionaire list. Koch Industries, based in Wichita, Kan., is a conglomerate with businesses in oil refining, pipelines, commodities trading, ranching and paper pulp. Charles Koch and his brother David (No. 6 on Bloomberg's list) each own 42% of the company.

Charles Koch, who has headed what was once his father's company for nearly 50 years, has derived his wealth from his stake in Koch Industries. The company's most valuable asset is Georgia-Pacific, a producer of paper and pulp, according to Bloomberg.

The Koch brother's cash investments includes stakes in at least 20 publicly-traded companies were valued at $378 million as of July 2015.

Charles Koch has pledged to raise $889 million for the 2016 U.S. presidential election. Bloomberg said.


4. Carlos Slim
America Movil
Net Worth: $58.7 billion
Net Change on Friday: -$1.5 billion, -2.5%
YTD Change: -$13.9 billion, -19.1%

Image placeholder title

Carlos Slim is Mexico's richest man and ranks fourth richest on Bloomberg's list of billionaires. Slim, 75, controls America Movil, the largest wireless services operator in Latin America.

Slim's fortune is derived from his 57% stake in America Mobile, followed by his stake in Grupo Carso, a holding company that includes the construction business he founded when he was 25.

The Mexican mogul also has holdings in banking and mining companies as well as stakes in publicly traded stocks like Philip Morris International (PM) - Get Report , The New York Times (NYT) - Get Report and Caixabank.

Image placeholder title

3. Warren Buffett
Berkshire Hathaway  (BRK.B) - Get Report
Net Worth: $63.4 billion
Net Change on Friday: -$1.7 billion, -2.6%
YTD Change: -$10.4 billion, -14.1%

Warren Buffett is Berkshire Hathaway's chairman and largest shareholder, owning 19% of the holding company. Often called the "Oracle of Omaha," the 85-year-old Buffett steadily acquired companies to enlarge Berkshire Hathaway's portfolio, which includes insurance giant Geico, MidAmerican Energy, See's Candies, and others.

Buffett has also been known to "rescue" companies in trouble during the financial crisis, including Goldman Sachs (GS) - Get Report. His wealth is also derived from stakes in public companies including Coca-Cola (KO) - Get Report , American Express (AXP) - Get Report and Wells Fargo (WFC) - Get Report.

Buffett has pledged to give away most of his wealth when he dies.

Image placeholder title

2. Amancio Ortega
Inditex
Net Worth: $69.1 billion
Net Change on Friday: -$1.4 billion, -2%
YTD Change: $8 billion, 13.1%

Amancio Ortega is Europe's richest person and ranked second on Bloomberg's billionaire list. Ortega, 79, owns 59% of Inditex, the parent company to retail clothing chain, Zara. The Spanish mogul built the retailer from ground up and expanded to Portugal, France and the U.S., since opening his first Zara store in 1975.

Ortega has plowed much of his dividend income (more than $3 billion since Inditex's 2001 IPO) into office and retail properties in Spain, the U.S. and other European cities, Bloomberg said.

Ortega also owns a 21.6% stake in Grilse, the parent of the Casas Novas equestrian center in Spain.

Image placeholder title

1. Bill Gates
Microsoft (MSFT) - Get Report
Net Worth: $82.4 billion
Net Change on Friday: -$1.4 billion, -1.7%
YTD Change: -$4.2 billion, -4.9%

Bill Gates is the world's richest person according to the Bloomberg list. He is co-founder and now technology adviser to Microsoft, the world's biggest software company.

Gates stepped down from his CEO position at Microsoft in 2000 to focus on philanthropic efforts with his wife Melinda.

Gates' 3% stake in the software company represents about one-tenth of his wealth, according to Bloomberg. The rest of his fortune is held within Cascade Investment, which has stakes in dozens of companies including AutoNation, Canadian National Railway, the Four Seasons Hotels and others.

Gates, 59, has donated $28 billion to the Bill & Melinda Gates Foundation, which has awarded grants to fight hunger, poverty and disease.