First Interstate BancSystem, Inc.
First Interstate BancSystem, Inc. (FIBK) Shares Outstanding — Overview
Basic and diluted weighted average shares, YoY change, float context, and historical trend from SEC filings and FMP.
FIBK · shares outstanding · updated Jun 8, 2026
Key metrics
as of Dec 31, 2025Shares Outstanding Growth Rate
CAGR · weighted avg basic sharesNegative CAGR typically indicates share buyback or retirement activity. Interpret alongside Splits and Financials tabs. Splits / Financials
Shares outstanding history
Annual shares outstanding by year
Financial Services sector shares outstanding comparison
Shares Outstanding for similar companies or competitors in the Financial Services sector.
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Understanding Shares Outstanding
Basic · Diluted · FloatWhat Are Shares Outstanding? (Basic)
First Interstate BancSystem, Inc. (FIBK) shares outstanding is the total number of issued shares held by shareholders — the basis for Basic EPS and market capitalization. As of December 31, 2025, First Interstate BancSystem, Inc. reports 102.6M basic shares outstanding (weighted average).
Basic vs. Diluted Shares Outstanding
First Interstate BancSystem, Inc.'s basic shares outstanding (102.6M) represents currently issued shares. Diluted shares outstanding (102.8M) also includes potential shares from stock options, RSUs, and convertibles. Dilution spread: +0.25%.
Shares Outstanding vs. Float (Free Float)
First Interstate BancSystem, Inc.'s float is 77.9M (80.2% of total shares outstanding) — shares freely available for public trading, excluding insider-held and restricted shares.
ⓘ Float data from /shares-float reflects the most recent SEC filing period-end. The weighted average shares (from /income-statement) may differ — this is a normal reporting window difference, not a data error.
FMP /income-statement · /shares-float · SEC EDGAR · USD
About shares outstanding & methodology
First Interstate BancSystem, Inc. (FIBK) shares outstanding history from 2006 to 2025. Shares outstanding can be defined as the total number of shares held by all shareholders — including institutional investors, retail investors, and company insiders — assuming conversion of all convertible debt, securities, warrants, and options. This metric excludes the company's treasury shares.
First Interstate BancSystem, Inc. shares outstanding for the fiscal year ending December 31, 2025 were 102.6M, a 0.40% decline year-over-year. First Interstate BancSystem, Inc. FY 2025 shares outstanding were 102.6M, a -0.40% decline from FY 2024.
First Interstate BancSystem, Inc. is a leading company operating in the Financial Services sector. The company's share count trajectory — with a 10-year CAGR of +8.5% — is a key signal for investors evaluating capital return policy, EPS accretion, and long-term shareholder value creation.
Frequently asked questions
FIBK shares outstanding · 4 questionsAs of December 31, 2025, First Interstate BancSystem, Inc. (FIBK) has approximately 102.6M basic shares outstanding and 102.8M diluted shares outstanding. This represents a -0.40% year-over-year change from FY 2024 (103.0M). First Interstate BancSystem, Inc.'s declining share count is primarily driven by its share buyback program. For the complete historical data table, see the history table above.
▸ Data: FMP /income-statement · /shares-float · SEC EDGAR · weighted average basis · First Interstate BancSystem, Inc. SEC 10-K & 10-Q filings · US GAAP · Last updated: 2026-06-08