Welcome to the 2017 Power 50 list, which ranks the most influential people in the industry.

#24: Marc Katz, CustomInk

2016 Rank: 17
Title: Chairman/CEO
Industry Experience: 17 years
Birthplace: Philadelphia

Harvard-educated with a degree in physics, the uber-talented Katz left Wall Street to co-found CustomInk in 1999 and start a do-it-yourself design trend in apparel. Katz has turned a small startup web firm into a $300 million company whose influence is increasingly felt in a promo segment shifting toward more personalized gear.