Company: Box

Net worth: $100 Million (est.) 

It was during his internships at Paramount Pictures and Miramax when Levie stumbled upon the idea to create a file and data-sharing program. Along with partner Dylan Smith, he founded Box—an online storage site for enterprise companies. The business continues to raise millions in financing, recently nabbing $125 million from General Atlantic and several other suitors, pushing its monetary worth up to $1 billion. So in other words, expect Levie’s bank account to surge over the next few months.