---
schema_version: "secwatch.filing_event.v1"
accession: "0000860413-26-000088"
form_type: "8-K"
ticker: "FIBK"
cik: "0000860413"
company_name: "FIRST INTERSTATE BANCSYSTEM INC"
filed_at: "2026-08-21T13:20:20+00:00"
generated_at: "2026-08-21T13:21:26.565086+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.35
calibrated_materiality_score: 0.35
confidence: "high"
source: SEC EDGAR
---

# First Interstate Bancsystem appoints Jeff Lee as EVP and COO effective Sept 14, 2026

## Summary
- Jeff Lee, 57, named EVP and Chief Operations Officer of FIBK and First Interstate Bank, starting Sept 14, 2026.
- Initial annual base salary set at $480,000; RSU grant of $200,000 vesting in three equal annual installments from Sept 2027.
- Lee brings 20+ years banking ops/tech experience; previously COO/CTO at Seacoast Banking Corp (SBCF) from 2021-2024.
- Employment agreement initial one-year term with automatic renewal unless terminated 90 days prior.

## SEC filing metadata
- accession: 0000860413-26-000088
- form_type: 8-K
- ticker: FIBK
- cik: 0000860413
- company_name: FIRST INTERSTATE BANCSYSTEM INC
- filed_at: 2026-08-21T13:20:20+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.35
- calibrated_materiality_score: 0.35
- confidence: high
- sec_items: 5.02, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/860413/000086041326000088/0000860413-26-000088-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/860413/000086041326000088/fibk-20260821.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000860413-26-000088
- JSON: https://secwatch.observer/filing/0000860413-26-000088.json
- Plain text: https://secwatch.observer/filing/0000860413-26-000088.txt

## Key facts
- Executive change
  Jeff Lee was appointed as Executive Vice President and Chief Operations Officer at FIRST INTERSTATE BANCSYSTEM INC.
  - Action: appointed
  - Role: Executive Vice President and Chief Operations Officer
  source text: On August 21, 2026, the registrant announced the appointment of Mr. Jeff Lee to become Executive Vice President and Chief Operations Officer of the registrant and its wholly owned subsidiary, First Interstate Bank (the “Bank”), with Mr. Lee’s employment starting date expected to begin formally on September 14, 2026 (the “Effective Date”).
  evidence_url: https://www.sec.gov/Archives/edgar/data/860413/000086041326000088/0000860413-26-000088-index.htm

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