1. Bill and Melinda Gates
- Net worth: $85.7 billion
Bill and Melinda Gates are the world’s wealthiest couple according to a report out today from Wealth-X.
Bill Gates famously dropped out of Harvard and co-founded Microsoft(, Tech30) in 1975 with Paul Allen.
Bill and Melinda are known for their high-profile Bill and Melinda Gates Foundation, which supports initiatives in education, world health and population and has donated more than $28 billion to philanthropic causes.
They also helped launch The Giving Pledge with Warren Buffett, which encourages the world’s richest individuals to dedicate the majority of their wealth to philanthropy.
2. Amancio Ortega Gaona and Flora Perez Marcote
- Net worth: $70.7 billion
Spanish businessman Amancio Ortega Gaona became Europe’s richest man after founding the successful global fashion chain Zara in 1975.
Zara is now part of a wider group of fashion labels under parent company, Inditex (), along with brands Pull&Bear, Massimo Dutti and Bershka.
3. Warren Buffett and Astrid Menks
- Net worth: $65 billion
Famed billionaire investor Warren Buffett married his second wife Astrid Menks in 2006, two years after the death of his first wife Susan Buffett.
Around the time of their nuptials, Buffett’s daughter Susie Buffett reportedly told the New York Timesthat she was thankful they were together.
“She loves him and takes care of him. If Warren didn’t have a cent, she’d be with him,” she told the newspaper.
Buffett made his billions investing in other companies through his holding company,Berkshire Hathaway (), where the 84-year-old remains CEO. His firm owns large stakes in firms such as American Express ( ), Coca-Cola ( ), Goldman Sachs ( )and IBM ( , Tech30).
4. David and Julia Koch
- Net worth: $47.5 billion
David Koch and his brother Charles Koch made their fortune with Koch Industries, a huge oil and gas conglomerate which is among the biggest private companies in North America.
David and his wife Julia met on a blind date and married in 1996.
Related: The Koch Brothers in 80 seconds
The Koch family is known for its strong political beliefs and philanthropic work.
The Koch brothers are considered some of the most powerful people in American politics because they donate a vast amount of money to support Republican candidates.
The family is also very involved in the arts. Julia is on the board of directors at the School of American Ballet.
5. Charles and Elizabeth Koch
- Net worth: $47.4 billion
Charles Koch began working in the family business founded by his father in the 1960s and then took over as chairman and CEO in 1967, after his father’s death.
He and his wife Elizabeth married in 1972 and have two children.
Like his brother David, Charles is actively involved in a range of philanthropic work.
He founded or helped build various organizations, including the Institute for Humane Studies, the Cato Institute and the Mercatus Center at George Mason University.
6. Wang Jianlin and Lin Ning
- Net worth: $40.7 billion
Property mogul Wang Jianlin is one of China’s richest men.
The self-made billionaire is chairman of Dalian Wanda, a real estate and entertainment conglomerate.
The company owns AMC Entertainment (), a range of luxury hotels, a portfolio of shopping malls and the British yacht maker Sunseeker.
7. Jeff and Mackenzie Bezos
- Net worth: $39.8 billion
Jeff Bezos founded Amazon (,Tech30) in 1994 after working on Wall Street for about eight years
He continues to serve as the company’s chairman and CEO, overseeing a corporate evolution where Amazon expanded its sales focus from books to an endless range of consumer goods.Amazon Studios is now increasingly competing in the same league as Netflix (,Tech30) and established cable networks like HBO.
He met his now-wife Mackenzie Bezos when they worked together at the investment firm D. E. Shaw.
They married in the early 1990s and worked to start Amazon together.
Mackenzie, an author, also founded Bystander Revolution in 2014, an anti-bullying organization.
8. Bernard Arnault and Helene Mercier
- Net worth: $38.7 billion
French businessman Bernard Arnault is chairman and CEO of the luxury goods conglomerate LVMH.
The company owns well-known brands including Fendi, Givenchy, Louis Vuitton, TAG Heuer and Benefit Cosmetics.
The Arnault family own a 5.6% stake in the group, which has a market value of 85 billion euros ($92.5 billion).
Arnault’s second wife Helene Mercier is an acclaimed pianist from Quebec.
9. Mark Zuckerberg and Priscilla Chan
- Net worth: $38.5 billion
Facebook (, Tech30) founder and CEO Mark Zuckerberg, 31, andPriscilla Chan, 30, are the youngest couple on this list.
They met at Harvard and weremarried in 2012, a day after his social media company begantrading on Wall Street.
In 2010, Zuckerberg signed the Giving Pledge, committing to give away the majority of his wealth to philanthropic causes.
In 2014, Zuckerberg and Chan announced they would donate $25 million to the Centers for Disease Control Foundation to combat Ebola.
10. Jim and Lynne Walton
- Net worth: $36.2 billion
Jim Walton is the youngest son ofWal-Mart () founder Samuel Walton.
He is on the board of directors of Wal-Mart and is also chairman and CEO at Arvest Bank Group, which operates in Arkansas, Kansas, Missouri and Oklahoma.
Jim is also chairman of a newspaper group called Community Publishers, Inc.
Source: CNN Money