 New York, New York--Newsfile Corp. - September 17, 2021 - The following statement is being issued by Levi Korsinsky, LLP:To: All Persons or Entities who purchased Great Western Bancorp, Inc. NYSE: GWB GWB of the Company stock prior to September 15, 2021.You are hereby notified that Levi Korsinsky, LLP has commenced an investigation into the fairness of the merger of GWB with First Interstate BancSystem, Inc. FIBK. Under the 