MILWAUKEE--(BUSINESS WIRE)--The Ademi Firm is investigating Potbelly (NASDAQ: PBPB) for possible breaches of fiduciary duty and other violations of law in its transaction with a RaceTrac. Click here to learn how to join our investigation and obtain additional information or contact us at gademi@ademilaw.com or toll-free: 866-264-3995. There is no cost or obligation to you. Shareholders of Potbelly will $17.12 per share in an all-cash transaction valued at approximately$566 million. Potbelly in. ...