SHAREHOLDER ALERT

Levi & Korsinsky, LLP Notifies Investors of an Investigation Regarding Whether the Sale of Northwest Bancorporation to First Interstate BancSystem, Inc. is Fair to Shareholders

The following statement is being issued by Levi & Korsinsky, LLP:

To: All Persons or Entities who purchased Northwest Bancorporation (“Northwest Bancorporation” or the “Company”) (OTC Pink: NBCT) stock prior to April 25, 2018.

You are hereby notified that Levi & Korsinsky, LLP has commenced an investigation into the fairness of the sale of Northwest Bancorporation to First Interstate BancSystem, Inc. (NASDAQGS: FIBK). Under the terms of the transaction, Northwest Bancorporation shareholders will receive 0.516 shares of First Interstate Class A common stock for each share of Northwest Bancorporation stock they own, representing a value of approximately $21.03 per share. To learn more about the action and your rights, go to:

http://www.zlk.com/mna/northwest-bancorporation

or contact Joseph E. Levi, Esq. either via email at [e-mail] or by telephone at [phone], toll-free: [phone]. There is no cost or obligation to you.

The investigation concerns whether the Board of Northwest Bancorporation breached their fiduciary duties to stockholders by failing to adequately shop the Company before agreeing to enter into this transaction, and whether First Interstate is underpaying for Northwest Bancorporation shares, thus unlawfully harming Northwest Bancorporation shareholders.

Levi & Korsinsky is a national firm with offices in New York, Connecticut, California, and Washington D.C. The firm's attorneys have extensive expertise in prosecuting securities litigation involving financial fraud, representing investors throughout the nation in securities lawsuits and have recovered hundreds of millions of dollars for aggrieved shareholders. For more information, please feel free to contact any of the attorneys listed below. Attorney advertising. Prior results do not guarantee similar outcomes.

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