10 wealthiest couples in the world

10. James and Lynne Walton, Combined net worth: $36.2 billion.

9. Mark Zuckerberg and Priscilla Chan, Combined net worth: $38.5 billion.

8. Bernard Arnault and Helene Mercier-Arnault, Combined net worth: $38.7 billion.

7. Jeff and MacKenzie Bezos, Combined net worth: $39.8 billion.

6. Wang Jianlin and Ning Lin, Combined net worth: $40.7 billion.

5. Charles and Elizabeth Koch, Combined net worth: $47.4 billion.

4. David and Julia Koch, Combined net worth: $47.5 billion.

3. Warren Buffett and Astrid Menks, Combined net worth: $65 billion.

2. Amancio Ortega Gaona and Flora Perez, Combined net worth: $70.7 billion.

1. Bill and Melinda Gates, Combined net worth: $85.7 billion.