Exhibit 21.1
Subsidiaries of First Interstate BancSystem, Inc.
Subsidiary |
| State of Incorporation or |
| Business Name |
First Interstate Bank |
| Montana |
| First Interstate Bank |
First Western Data, Inc. |
| South Dakota |
| First Western Data, Inc. |
First Interstate Statutory Trust |
| Delaware |
| First Interstate Statutory Trust |
FI Statutory Trust I |
| Connecticut |
| FI Statutory Trust I |
FI Capital Trust II |
| Delaware |
| FI Capital Trust II |
FI Statutory Trust III |
| Delaware |
| FI Statutory Trust III |
FI Capital Trust IV |
| Delaware |
| FI Capital Trust IV |
FI Statutory Trust V |
| Delaware |
| FI Statutory Trust V |
FI Statutory Trust VI |
| Delaware |
| FI Statutory Trust VI |
Commerce Financial, Inc. |
| Montana |
| Commerce Financial, Inc. |
First Interstate Insurance Agency, Inc. |
| Montana |
| First Interstate Insurance Agency, Inc. |
FIBCT, LLC |
| Montana |
| Crytech |
FIB, LLC |
| Montana |
| FIB, LLC |