---
schema_version: "secwatch.filing_event.v1"
accession: "0000860413-23-000052"
form_type: "8-K"
ticker: "FIBK"
cik: "0000860413"
company_name: "FIRST INTERSTATE BANCSYSTEM INC"
filed_at: "2023-03-16T23:59:59+00:00"
generated_at: "2026-06-18T01:23:08.534003+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.1
calibrated_materiality_score: 0.1
confidence: "high"
source: SEC EDGAR
---

# First Interstate BancSystem amends bylaws to enhance shareholder proposal and nomination procedures

## Summary
- Enhanced disclosure requirements for shareholder director nominations and proposals (other than Rule 14a-8 proposals).
- Added provisions requiring compliance with Universal Proxy Rules, including notice of changes within 2 business days.
- Requires any shareholder soliciting proxies to use a proxy card color other than white.

## SEC filing metadata
- accession: 0000860413-23-000052
- form_type: 8-K
- ticker: FIBK
- cik: 0000860413
- company_name: FIRST INTERSTATE BANCSYSTEM INC
- filed_at: 2023-03-16T23:59:59+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.1
- calibrated_materiality_score: 0.1
- confidence: high
- sec_items: 5.03, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/860413/000086041323000052/0000860413-23-000052-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/860413/000086041323000052/fibk-20230310.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000860413-23-000052
- JSON: https://secwatch.observer/filing/0000860413-23-000052.json
- Plain text: https://secwatch.observer/filing/0000860413-23-000052.txt

## Key facts
- Governance Changes
  FIRST INTERSTATE BANCSYSTEM INC: Adopted Second Amendment to Bylaws enhancing procedural mechanics and disclosure requirements for shareholder nominations and proposals, including Universal Proxy Rules compliance (effective 2023-03-10).
  - Change: bylaw amendment
  - Effective: 2023-03-10
  source text: The Board of Directors of the registrant (the “Board”), based in part upon the recommendation of the Governance and Nominating Committee of the Board, in connection with a review of the registrant’s Fourth Amended and Restated Bylaws, as amended (the “Bylaws”), adopted a Second Amendment to the Bylaws (the “Second Amendment”), effective as of March 10, 2023.
  evidence_url: https://www.sec.gov/Archives/edgar/data/860413/000086041323000052/0000860413-23-000052-index.htm

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