First Interstate Bancsystem, Inc. Financials, FR Y-9C Data and Filings

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Bank Holding Company Montana RSSD 1123670 Ticker FIBK FRS Est. 1971

First Interstate Bancsystem, Inc. is a bank holding company based in Montana with $25.88B in total consolidated assets as of June 30, 2026, according to its FR Y-9C filing with the Federal Reserve. It owns 1 bank that files a call report: First Interstate Bank ($25.79B in assets). Its shares trade under the ticker FIBK, and it files with the SEC under CIK 860413: see its SEC filings and 8-K events.

Key Financials FR Y-9C, consolidated, as of June 30, 2026

Total assets: $25.88B
Total deposits: $21.44B
Total equity: $3.32B
Net income (Q2 2026): $83.9M
ROA: 1.28%
ROE: 10.05%
Net interest margin: 3.56%
CET1 ratio: 14.54%

Total loans: $14.28B
Efficiency ratio: 58.30%
Equity / assets: 12.84%
Tier 1 leverage ratio: 9.59%
Total capital ratio: 17.30%
Employees (FTE): 3,174

Source: FR Y-9C for June 30, 2026, consolidated across the holding company's banks and nonbank subsidiaries. Net income is for Q2 2026 alone; ROA, ROE and net interest margin annualize that quarter, and the margin is tax-equivalent, on average earning assets. Deposits add domestic and foreign-office deposits (Schedule HC, item 13). Capital ratios are as filed on Schedule HC-R (CET1: BHCAP793). Bank-level figures in the tables below come from each bank's own call report.

Bank Subsidiaries 1 bank held directly or through another holding company

Bank	Charter	State	Total assets (call report)	Share of bank assets	Held through
First Interstate Bank	State Member Bank	MT	$25.79B	100.0%	Held directly

Questions About First Interstate Bancsystem, Inc.

What are First Interstate Bancsystem, Inc.'s total assets?

First Interstate Bancsystem, Inc. reported $25.88B in total consolidated assets as of June 30, 2026, according to its FR Y-9C filing with the Federal Reserve.

How many banks does First Interstate Bancsystem, Inc. own?

First Interstate Bancsystem, Inc. owns 1 bank that files a call report: First Interstate Bank.

Who owns First Interstate Bank?

First Interstate Bank is owned by First Interstate Bancsystem, Inc. The bank reported $25.79B in total assets on its latest call report.

Where can I find First Interstate Bancsystem, Inc.'s FR Y-9C?

First Interstate Bancsystem, Inc. files the FR Y-9C with the Federal Reserve every quarter. The reports are public on the FFIEC National Information Center under RSSD ID 1123670. This page summarizes the FR Y-9C for Q2 2026.

Does First Interstate Bancsystem, Inc. file with the SEC?

Yes. First Interstate Bancsystem, Inc. files with the SEC under Central Index Key (CIK) 860413 and trades under the ticker FIBK.

Filing Details fiscal year and SEC registration

Fiscal year end: December 31
Ticker: FIBK
SEC CIK: 860413
SEC filings: Filings and 8-K events

Organization Map select + to expand a subsidiary's own holdings

Holding company Reporting bank Nonbank subsidiary

First Interstate Bancsystem, Inc.

Holding Company MT RSSD 1123670

$25.88B
- First Interstate Bank
  
  State Member Bank MT RSSD 659855
  
  $25.79B
- Fi Capital Trust II
  
  Nonbank Subsidiary MT RSSD 3663899
- Fi Capital Trust IV
  
  Nonbank Subsidiary MT RSSD 3684120
- Fi Statutory Trust I
  
  Nonbank Subsidiary MT RSSD 3663880
- Fi Statutory Trust III
  
  Nonbank Subsidiary MT RSSD 3684111
- Fi Statutory Trust V
  
  Nonbank Subsidiary MT RSSD 3691052
- Fi Statutory Trust VI
  
  Nonbank Subsidiary MT RSSD 3691061
- Great Western Statutory Trust IV
  
  Nonbank Subsidiary CT RSSD 3232718
- GWB Capital Trust VI
  
  Nonbank Subsidiary NE RSSD 3441172
- HF Financial Capital Trust V
  
  Nonbank Subsidiary SD RSSD 4286231
- HF Financial Capital Trust VI
  
  Nonbank Subsidiary SD RSSD 4286240
- Northwest Bancorporation Capital Trust I
  
  Nonbank Subsidiary WA RSSD 3372520
- Sunstate Bancshares Trust II
  
  Nonbank Subsidiary AZ RSSD 3364075

Direct Subsidiaries 13 active direct subsidiaries

Entity	Type	State	Total Assets	Share of bank subsidiary assets
First Interstate Bank · 659855	State Member Bank	MT	$25.79B	100.0%
Fi Capital Trust II · 3663899	Nonbank Subsidiary	MT	—	—
Fi Capital Trust IV · 3684120	Nonbank Subsidiary	MT	—	—
Fi Statutory Trust I · 3663880	Nonbank Subsidiary	MT	—	—
Fi Statutory Trust III · 3684111	Nonbank Subsidiary	MT	—	—
Fi Statutory Trust V · 3691052	Nonbank Subsidiary	MT	—	—
Fi Statutory Trust VI · 3691061	Nonbank Subsidiary	MT	—	—
Great Western Statutory Trust IV · 3232718	Nonbank Subsidiary	CT	—	—
GWB Capital Trust VI · 3441172	Nonbank Subsidiary	NE	—	—
HF Financial Capital Trust V · 4286231	Nonbank Subsidiary	SD	—	—
HF Financial Capital Trust VI · 4286240	Nonbank Subsidiary	SD	—	—
Northwest Bancorporation Capital Trust I · 3372520	Nonbank Subsidiary	WA	—	—
Sunstate Bancshares Trust II · 3364075	Nonbank Subsidiary	AZ	—	—

Share of bank subsidiary assets divides each bank's total assets by the combined assets of the bank subsidiaries listed. Nonbank subsidiaries are not counted.

Regulator records: FFIEC NIC profile (RSSD 1123670)