These are the world’s youngest self-made billionaires

Age: 32

Residence: Palo Alto, California

Estimated wealth: $4.3 billion

Holmes founded healthcare-technology company Theranos as a sophomore at Stanford. Within months, she dropped out to pursue her entrepreneurial path and build her company. Today, she's America's youngest female billionaire at age 31.

Age: 35

Residence: Bangalore, India

Estimated wealth: $1.4 billion

In 2007, Bansal teamed up with Binny Bansal — no relation, despite the same surname — to found Flipkart as an online seller of books. Today, it's India's top internet retailer, with 30 million products and 44 million registered users.

Age: 27

Residence: San Francisco, California

Estimated wealth: $1.0 billion

The Stripe cofounder and CEO dropped out of MIT to partner with his brother John and pursue an entrepreneurial path. Their start-up was most recently valued at $5 billion in October.

Age: 27

Residence: San Francisco, California

Estimated wealth: $1 billion

The Harvard dropout cofounded Stripe, an online payment company, with his brother Patrick in 2011. The Irish-born brothers now live in San Francisco, where the company is based.

Age Nathan Blecharczyk: 32

Residence: San Francisco, California

Estimated wealth: $3.6 billion

The Harvard graduate was working as a product manager at Microsoft when his former roommate Joe Gebbia recruited him to cofound Airbnb. As the current CTO, he led the company's recent push into Cuba.

Age : 32

Residence: Palo Alto, California

Estimated wealth: $45 billion

The Facebook cofounder and CEO became the youngest self-made billionaire in history at age 23, thanks to Facebook's IPO. Today, Zuckerberg and his wife Priscilla are the ninth-wealthiest couple in the world and active philanthropists.