Mailing Address 401 NO 31ST STREET BILLINGS MT 59101
Business Address 401 NO 31ST STREET BILLINGS MT 59101 4062555311
FIRST INTERSTATE BANCSYSTEM INC CIK#: 0000860413 (see all company filings)

SIC: 6022 - STATE COMMERCIAL BANKS
State location: MT | State of Inc.: DE | Fiscal Year End: 1231
formerly: FIRST INTERSTATE BANCSYSTEM OF MONTANA INC (filings through 1999-03-09)
(CF Office: 02 Finance)
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Items 1 - 40  0000860413 Filings RSS Feed
Filings Format Description Filing Date File/Film Number
10-Q  Documents   Interactive Data Quarterly report [Sections 13 or 15(d)]
Acc-no: 0000860413-25-000060 (34 Act)  Size: 17 MB
2025-05-07 001-34653
25920808
8-K  Documents   Interactive Data Current report, items 2.02, 7.01, 8.01, and 9.01
Acc-no: 0000860413-25-000057 (34 Act)  Size: 4 MB
2025-04-29 001-34653
25887475
8-K  Documents   Interactive Data Current report, items 7.01 and 9.01
Acc-no: 0000860413-25-000051 (34 Act)  Size: 286 KB
2025-04-28 001-34653
25880241
SCHEDULE 13G/A  Documents [Amend] Statement of Beneficial Ownership by Certain Investors
Acc-no: 0001576419-25-000597 (34 Act)  Size: 11 KB
2025-04-17 005-78756
25844555
ARS  Documents Annual Report to Security Holders
Acc-no: 0000860413-25-000047 (34 Act)  Size: 43 MB
2025-04-08 001-34653
25822022
DEFA14A  Documents Additional definitive proxy soliciting materials and Rule 14(a)(12) material
Acc-no: 0000860413-25-000046 (34 Act)  Size: 189 KB
2025-04-08 001-34653
25821966
DEF 14A  Documents   Interactive Data Other definitive proxy statements
Acc-no: 0000860413-25-000045 (34 Act)  Size: 30 MB
2025-04-08 001-34653
25821916
8-K  Documents   Interactive Data Current report, items 5.02 and 9.01
Acc-no: 0000860413-25-000036 (34 Act)  Size: 154 KB
2025-03-19 001-34653
25753685
10-K  Documents   Interactive Data Annual report [Section 13 and 15(d), not S-K Item 405]
Acc-no: 0000860413-25-000022 (34 Act)  Size: 27 MB
2025-02-28 001-34653
25692451
8-K  Documents   Interactive Data Current report, items 5.02 and 9.01
Acc-no: 0000860413-25-000017 (34 Act)  Size: 156 KB
2025-02-26 001-34653
25665377
8-K  Documents   Interactive Data Current report, items 5.02, 7.01, and 9.01
Acc-no: 0000860413-25-000015 (34 Act)  Size: 532 KB
2025-02-25 001-34653
25659544
SCHEDULE 13G  Documents Statement of Beneficial Ownership by Certain Investors
Acc-no: 0000315066-25-000694 (34 Act)  Size: 11 KB
2025-02-12 005-78756
25612277
8-K  Documents   Interactive Data Current report, items 2.02, 7.01, 8.01, and 9.01
Acc-no: 0000860413-25-000006 (34 Act)  Size: 4 MB
2025-01-29 001-34653
25569724
8-K  Documents   Interactive Data Current report, items 2.02, 2.06, and 9.01
Acc-no: 0000860413-25-000003 (34 Act)  Size: 161 KB
2025-01-10 001-34653
25520654
SC 13G/A  Documents [Amend] Statement of Beneficial Ownership by Certain Investors
Acc-no: 0000315066-24-002730 (34 Act)  Size: 8 KB
2024-11-12 005-78756
241444532
10-Q  Documents   Interactive Data Quarterly report [Sections 13 or 15(d)]
Acc-no: 0000860413-24-000130 (34 Act)  Size: 21 MB
2024-11-04 001-34653
241424292
8-K  Documents   Interactive Data Current report, items 2.02, 7.01, 8.01, and 9.01
Acc-no: 0000860413-24-000128 (34 Act)  Size: 4 MB
2024-10-24 001-34653
241392880
8-K  Documents   Interactive Data Current report, items 5.02, 7.01, and 9.01
Acc-no: 0000860413-24-000125 (34 Act)  Size: 567 KB
2024-10-09 001-34653
241363300
10-Q  Documents   Interactive Data Quarterly report [Sections 13 or 15(d)]
Acc-no: 0000860413-24-000118 (34 Act)  Size: 22 MB
2024-08-02 001-34653
241169550
8-K  Documents   Interactive Data Current report, items 2.02, 7.01, 8.01, and 9.01
Acc-no: 0000860413-24-000111 (34 Act)  Size: 4 MB
2024-07-25 001-34653
241141968
8-K  Documents   Interactive Data Current report, items 5.02 and 9.01
Acc-no: 0000860413-24-000108 (34 Act)  Size: 159 KB
2024-07-12 001-34653
241114480
8-K  Documents   Interactive Data Current report, items 5.02 and 9.01
Acc-no: 0000860413-24-000106 (34 Act)  Size: 401 KB
2024-06-14 001-34653
241043064
SC 13D/A  Documents [Amend] General Statement of Acquisition of Beneficial Ownership
Acc-no: 0001493152-24-021746 (34 Act)  Size: 588 KB
2024-05-29 005-78756
24996792
S-8  Documents Securities to be offered to employees in employee benefit plans
Acc-no: 0000860413-24-000073 (33 Act)  Size: 136 KB
2024-05-23 333-279687
24979754
8-K  Documents   Interactive Data Current report, items 5.02, 5.07, and 7.01
Acc-no: 0000860413-24-000071 (34 Act)  Size: 173 KB
2024-05-23 001-34653
24978891
DEFA14A  Documents Additional definitive proxy soliciting materials and Rule 14(a)(12) material
Acc-no: 0000860413-24-000068 (34 Act)  Size: 88 KB
2024-05-07 001-34653
24919245
10-Q  Documents   Interactive Data Quarterly report [Sections 13 or 15(d)]
Acc-no: 0000860413-24-000066 (34 Act)  Size: 21 MB
2024-05-03 001-34653
24912146
DEFA14A  Documents Additional definitive proxy soliciting materials and Rule 14(a)(12) material
Acc-no: 0000860413-24-000062 (34 Act)  Size: 71 KB
2024-04-30 001-34653
24897876
8-K  Documents   Interactive Data Current report, items 2.02, 7.01, 8.01, and 9.01
Acc-no: 0000860413-24-000059 (34 Act)  Size: 4 MB
2024-04-24 001-34653
24870638
ARS  Documents Annual Report to Security Holders
Acc-no: 0000860413-24-000055 (34 Act)  Size: 41 MB
2024-04-11 001-34653
24838826
DEFA14A  Documents Additional definitive proxy soliciting materials and Rule 14(a)(12) material
Acc-no: 0000860413-24-000054 (34 Act)  Size: 220 KB
2024-04-11 001-34653
24838806
DEF 14A  Documents   Interactive Data Other definitive proxy statements
Acc-no: 0000860413-24-000053 (34 Act)  Size: 23 MB
2024-04-11 001-34653
24838794
8-K  Documents   Interactive Data Current report, items 5.02 and 9.01
Acc-no: 0000860413-24-000047 (34 Act)  Size: 176 KB
2024-04-04 001-34653
24823785
SC 13D/A  Documents [Amend] General Statement of Acquisition of Beneficial Ownership
Acc-no: 0001493152-24-013148 (34 Act)  Size: 195 KB
2024-04-04 005-78756
24822682
10-K  Documents   Interactive Data Annual report [Section 13 and 15(d), not S-K Item 405]
Acc-no: 0000860413-24-000016 (34 Act)  Size: 30 MB
2024-02-29 001-34653
24702882
SC 13G/A  Documents [Amend] Statement of Beneficial Ownership by Certain Investors
Acc-no: 0001104659-24-020940 (34 Act)  Size: 13 KB
2024-02-13 005-78756
24628400
SC 13G  Documents Statement of Beneficial Ownership by Certain Investors
Acc-no: 0000315066-24-001186 (34 Act)  Size: 8 KB
2024-02-09 005-78756
24611627
8-K  Documents   Interactive Data Current report, items 2.02, 7.01, 8.01, and 9.01
Acc-no: 0000860413-24-000003 (34 Act)  Size: 4 MB
2024-01-30 001-34653
24578459
SC 13G  Documents Statement of Beneficial Ownership by Certain Investors
Acc-no: 0001023875-24-000012 (34 Act)  Size: 94 KB
2024-01-30 005-78756
24576923
SC 13G/A  Documents [Amend] Statement of Beneficial Ownership by Certain Investors
Acc-no: 0001086364-24-004329 (34 Act)  Size: 13 KB
2024-01-26 005-78756
24565832