---
schema_version: "secwatch.filing_event.v1"
accession: "0000860413-26-000034"
form_type: "8-K"
ticker: "FIBK"
cik: "0000860413"
company_name: "FIRST INTERSTATE BANCSYSTEM INC"
filed_at: "2026-04-29T23:59:59+00:00"
generated_at: "2026-05-15T02:36:31.502825+00:00"
event_type: "earnings"
sentiment: "neutral"
materiality_score: 0.75
calibrated_materiality_score: 0.75
confidence: "high"
source: SEC EDGAR
---

# First Interstate Q1 net income $60.2M ($0.61 EPS); NIM expands to 3.41%; share repurchase $84M

## Summary
- Net income $60.2M ($0.61 diluted EPS) vs $108.8M ($1.08) in Q4 2025, which included $62.7M branch sale gain; YoY up from $50.2M ($0.49).
- Net interest margin 3.41%, up 5 bps QoQ and 22 bps YoY; net interest income $200.7M.
- Net charge-offs fell to $2.4M (0.06% annualized) from $22.1M (0.56%) in Q4 2025.
- Repurchased 2.39M shares for ~$84M in Q1; board authorized additional $150M (total $300M).
- Non-performing assets rose 17.5% to $162.5M; criticized loans down $18.6M to $1.03B.

## SEC filing metadata
- accession: 0000860413-26-000034
- form_type: 8-K
- ticker: FIBK
- cik: 0000860413
- company_name: FIRST INTERSTATE BANCSYSTEM INC
- filed_at: 2026-04-29T23:59:59+00:00
- event_type: earnings
- sentiment: neutral
- materiality_score: 0.75
- calibrated_materiality_score: 0.75
- confidence: high
- sec_items: 2.02, 7.01, 8.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/860413/000086041326000034/0000860413-26-000034-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/860413/000086041326000034/fibk-20260429.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000860413-26-000034
- JSON: https://secwatch.observer/filing/0000860413-26-000034.json
- Plain text: https://secwatch.observer/filing/0000860413-26-000034.txt

## Key facts
- Earnings Releases
  FIRST INTERSTATE BANCSYSTEM INC reported the first quarter of 2026 results: net income net income of $60.2 million, EPS $0.61 per diluted share.
  - Period: the first quarter of 2026
  - Net income: net income of $60.2 million
  - EPS: $0.61 per diluted share
  - Result: reported results
  source text: For the quarter, the Company reported net income of $60.2 million, or $0.61 per diluted share, which compares to net income of $108.8 million, or $1.08 per diluted share, for the fourth quarter of 2025 and net income of $50.2 million, or $0.49 per diluted share, for the first quarter of 2025.
  evidence_url: https://www.sec.gov/Archives/edgar/data/860413/000086041326000034/0000860413-26-000034-index.htm

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.