Brennan Agranoff

19-year-old entrepreneur who founded his company HoopSwagg, a leader in the athletic sock industry when he was only 13 years old. Agranoff's lightbulb moment came in 2013 at a high-school basketball game, where he noticed most kids were wearing the same plain Nike athletic socks. If these simple socks started such a craze, he wondered: What would happen if he kicked things up a notch and printed custom designs on them? The company is now shipping 70 to 100 orders a day, with each pair of socks priced at $14.99.

Since founding HoopSwagg four years ago, he has grown the company to nearly $2 million in annual sales and employs more than 70 people. HoopSwagg announced its first acquisition: It bought competitor, which will add over 300 designs to the portfolio and help expand HoopSwagg's customer base. Agranoff has also created numerous other successful brands ranging from pet socks to oven mitts and pillows.