(Image source: Potbelly) The Chicago sandwich chain, Potbelly Corp (NASDAQ:PBPB) will start trading on the Nasdaq today. Potbelly offers sandwiches, milkshakes, salads, soups, and baked goods. The company has raised $105 million from an issuance of 7.5 million shares. The shares were sold at $14, which was the above the projected range of $12 to $13 per share. Expect shares to trade at the $14 per share range.