FIRST INTERSTATE BANCSYSTEM INC reports

Company location: Billings, MT
Fiscal year end: 31 December

FIRST INTERSTATE BANCSYSTEM INC has filed 2,949 SEC EDGAR filings since 14 Jun 1996

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SEC filing history

Showing 1-25 of 1,000 matching filings.

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1

4

FORM 4

Filing date: 03 Jun 2026
Reporting date: 01 Jun 2026
SEC evidence: Open document Open filing
Next action: Verify source filing

4

FORM 4

Filing date: 03 Jun 2026
Reporting date: 01 Jun 2026
SEC evidence: Open document Open filing
Next action: Verify source filing

4

FORM 4

Filing date: 03 Jun 2026
Reporting date: 01 Jun 2026
SEC evidence: Open document Open filing
Next action: Verify source filing

4

FORM 4

Filing date: 03 Jun 2026
Reporting date: 01 Jun 2026
SEC evidence: Open document Open filing
Next action: Verify source filing

4

FORM 4

Filing date: 03 Jun 2026
Reporting date: 01 Jun 2026
SEC evidence: Open document Open filing
Next action: Verify source filing

4

FORM 4

Filing date: 03 Jun 2026
Reporting date: 01 Jun 2026
SEC evidence: Open document Open filing
Next action: Verify source filing

4

FORM 4

Filing date: 03 Jun 2026
Reporting date: 01 Jun 2026
SEC evidence: Open document Open filing
Next action: Verify source filing

4

FORM 4

Filing date: 03 Jun 2026
Reporting date: 01 Jun 2026
SEC evidence: Open document Open filing
Next action: Verify source filing

4

FORM 4

Filing date: 03 Jun 2026
Reporting date: 01 Jun 2026
SEC evidence: Open document Open filing
Next action: Verify source filing

4

FORM 4

Filing date: 03 Jun 2026
Reporting date: 01 Jun 2026
SEC evidence: Open document Open filing
Next action: Verify source filing

4

FORM 4

Filing date: 03 Jun 2026
Reporting date: 01 Jun 2026
SEC evidence: Open document Open filing
Next action: Verify source filing

4

FORM 4

Filing date: 03 Jun 2026
Reporting date: 01 Jun 2026
SEC evidence: Open document Open filing
Next action: Verify source filing

4

FORM 4

Filing date: 03 Jun 2026
Reporting date: 01 Jun 2026
SEC evidence: Open document Open filing
Next action: Verify source filing

4

FORM 4

Filing date: 03 Jun 2026
Reporting date: 01 Jun 2026
SEC evidence: Open document Open filing
Next action: Verify source filing

4

FORM 4

Filing date: 03 Jun 2026
Reporting date: 01 Jun 2026
SEC evidence: Open document Open filing
Next action: Verify source filing

4

FORM 4

Filing date: 03 Jun 2026
Reporting date: 01 Jun 2026
SEC evidence: Open document Open filing
Next action: Verify source filing

8-K File 001-34653

8-K

Filing date: 29 May 2026
Reporting date: 27 May 2026
SEC evidence: Open document Open filing Open XBRL
Next action: Verify source filing

S-3ASR File 333-296234

S-3ASR

Filing date: 26 May 2026
Reporting date: Not listed
SEC evidence: Open document Open filing Open XBRL
Next action: Verify source filing

SCHEDULE 13G/A File 005-78756

SCHEDULE 13G/A filing

Filing date: 15 May 2026
Reporting date: Not listed
SEC evidence: Open document Open filing
Next action: Verify source filing

8-K File 001-34653

8-K

Filing date: 13 May 2026
Reporting date: 11 May 2026
SEC evidence: Open document Open filing Open XBRL
Next action: Verify source filing

10-Q File 001-34653

10-Q

Filing date: 07 May 2026
Reporting date: 31 Mar 2026
SEC evidence: Open document Open filing Open XBRL
Next action: Verify source filing

4

4

Filing date: 01 May 2026
Reporting date: 30 Apr 2026
SEC evidence: Open document Open filing
Next action: Verify source filing

144 File 001-34653

144 filing

Filing date: 30 Apr 2026
Reporting date: Not listed
SEC evidence: Open document Open filing
Next action: Verify source filing

8-K File 001-34653

8-K

Filing date: 29 Apr 2026
Reporting date: 29 Apr 2026
SEC evidence: Open document Open filing Open XBRL
Next action: Verify source filing

SCHEDULE 13G File 005-78756

SCHEDULE 13G filing

Filing date: 29 Apr 2026
Reporting date: Not listed
SEC evidence: Open document Open filing
Next action: Verify source filing

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