Portillo's plans to go public

Portillo’s was founded in 1963 by Dick Portillo, who sold hot dogs from a stand in Villa Park. Portillo sold the company to Berkshire Partners for nearly $1 billion in 2014.

This generation is ranked worst tippers

The younger generation was found to be the worst culprit, specifically millennials, ages 25-40, and Gen Zers, ages 18-24, who were both found to be the worst tippers.