Webcast Second Quarter 2010 Earnings Conference Call Friday, July 23, 2010, 1:00 PM ET

First Interstate BancSystem, Inc. is a $7.1 billion financial holding company headquartered in Billings, Montana. Its principal subsidiary, First Interstate Bank, offers a full range of banking and financial services to individuals, businesses and municipalities throughout Montana, Wyoming, and western South Dakota.

First Interstate’s course was set by its founder, Homer Scott, Sr., who believed that people and organizations are not known by what they say, but by what they do. From the time Homer Scott, Sr. first purchased the bank in 1968, through its growth in the last 42 years, the family of First Interstate BancSystem has always adhered to a strong set of guiding principles, which are formally stated in the Company’s Strategic Vision.

On March 5, 2010, First Interstate completed a recapitalization of the Company's previously existing common stock and which included a 4-for-1 stock split of the previously existing common stock, a redesignation of the previously existing common stock into Class B common stock and the creation of a new class of common stock designated as Class A common stock.

The rights of the holders of Class A common stock and Class B common stock are identical, except with respect to voting and conversion. Each share of Class A common stock is entitled to one vote per share. Each share of Class B common stock is entitled to 5 votes per share, and is convertible at any time into one share of Class A common stock.

First Interstate completed its initial public offering of 11,500,000 shares of Class A common stock on March 29, 2010. The shares of Class A common stock are traded on the NASDAQ Stock Market under the symbol FIBK. The Class B common stock is not and will not be listed on the NASDAQ Stock Market or any other exchange.