FIRST INTERSTATE BANCSYSTEM INC — Regulatory Filings 2010

Sep 24, 2010

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UNITED STATES SECURITIES AND EXCHANGE COMMISSION

Washington D.C. 20549

FORM 8-K

CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

Date of report (date of earliest event reported): September 24, 2010

FIRST INTERSTATE BANCSYSTEM, INC.

(Exact name of registrant as specified in its charter)

Montana	001-34653	81-0331430
(State or other jurisdiction of	(Commission	(IRS Employer
incorporation or organization)	File No.)	Identification No.)

401 North 31 st Street, Billings, MT

(Address of principal executive offices)

(406) 255-5390

(Registrant’s telephone number, including area code)

Not Applicable

(Former name or former address, if changed since last report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the Registrant under any of the following provisions:

o Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

o Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

o Pre-commencement communications pursuant to Rule 14d-2(b) under Exchange Act (17 CFR 240.14d-2(b))

o Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

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link2 "Item 8.01 Other Events."

Item 8.01 Other Events.

On September 24, 2010, First Interstate BancSystem, Inc. (the “Registrant”) issued a press release announcing the declaration of a quarterly dividend to common shareholders of $0.1125 per share to be paid on October 15, 2010 to shareholders of record as of October 4, 2010.

link2 "Item 9.01 Financial Statements and Exhibits."

Item 9.01 Financial Statements and Exhibits.

(d) Exhibit 99.1 — Press Release dated September 24, 2010 announcing declaration of quarterly dividend to common shareholders.

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link1 " SIGNATURE"

SIGNATURE

Pursuant to the requirements of the Securities and Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

Dated: September 24, 2010

FIRST INTERSTATE BANCSYSTEM, INC.
By:	/s/ LYLE R. KNIGHT
	Lyle R. Knight
	President and Chief Executive Officer

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