5. Mark Zuckerberg
- Age: 37
- Residence: Palo Alto, Calif.
- Co-founder, CEO, and Chair: Facebook (FB)
- Net Worth: $97 billion
- Facebook Ownership Stake: 13% ($138 billion)
- Other Assets: $3.35 billion in cash and $225 million in real estate
Mark Zuckerberg first developed Facebook alongside fellow students Eduardo Saverin, Dustin Moskovitz, and Chris Hughes while attending Harvard University in 2004. As Facebook began to be used at other universities, Zuckerberg dropped out of Harvard to focus entirely on his growing business. Today, Zuckerberg is the CEO and chair of Facebook, which had more than 2.8 billion monthly active users as of Q1 2021.
Facebook is the world’s largest social networking service, enabling its users to create a personal profile, connect with friends and family, join or create groups, and much more. As the website is free to use, most of the company’s revenue is generated through advertising.
Facebook (the company) is also host to several other brands, including photo-sharing app Instagram, which it acquired in 2012; cross-platform mobile messaging service WhatsApp and virtual-reality–headset producer Oculus, both acquired in 2014; Workplace, its enterprise-connectivity platform; Portal, its line of video-calling devices; and Novi, its digital wallet for the Diem payment system.
Zuckerberg and his wife, Priscilla Chan, founded the Chan Zuckerberg Initiative in 2015, with each of them serving as co-CEO. Their charity seeks to leverage technology to fix societal ills, such as improving the access and quality of education, reforming both the criminal justice system and the U.S. immigration system, improving housing affordability, and eventually eradicating all diseases.