First Interstate BancSystem, which operates a financial and bank holding company in Montana, Wyoming and South Dakota, filed on Friday with the SEC to raise up to $115 million in an initial public offering. The Billings, MT-based company, which was founded in 1968 and had $6.9 billion in assets as of Sept. 30, 2009, plans to list on the NASDAQ under the symbol FIBK. Barclays Capital is the lead underwriter on the deal. No pricing terms were disclosed.
