UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

NOTICE OF EFFECTIVENESS

Effective Date: September 10, 2018
Accession Number: 0000860413-18-000140
Submission Type: POS AM
CIK: 0000860413
Company Name: FIRST INTERSTATE BANCSYSTEM INC
File Number: 333-225521
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