NEW YORK, Oct. 28, 2021 /PRNewswire/ -- Halper Sadeh LLP, a global investor rights law firm, announces it is investigating the following companies:

Great Western Bancorp, Inc. (NYSE:GWB) concerning potential violations of the federal securities laws and/or breaches of fiduciary duties relating to its sale to First Interstate BancSystem, Inc. Under the terms of the agreement, Great Western shareholders will receive 0.8425 shares of First Interstate Class A common stock for each Great Western share they own. Following completion of the transaction, Great Western shareholders will collectively own 43% of the combined company. If you are a Great Western shareholder, click here to learn more about your rights and options.