Crain’s reporter Ally Marotti talks with host Amy Guth about Potbelly’s plan to quintuple the sandwich chain's store count as the company’s CEO looks toward franchising.

Plus: Google nears deal for Fulton Market expansion, downtown office vacancy jumps to another record high, fastest-growing industries on Crain's latest list of Chicago's private companies and Dr. Ngozi Ezike will become CEO of Sinai Chicago.