---
schema_version: "secwatch.filing_event.v1"
accession: "0001104659-26-058671"
form_type: "8-K/A"
ticker: "FBIZ"
cik: "0001521951"
company_name: "FIRST BUSINESS FINANCIAL SERVICES, INC."
filed_at: "2026-05-11T20:19:06+00:00"
generated_at: "2026-05-11T21:57:00.957511+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.65
calibrated_materiality_score: 0.65
confidence: "high"
source: SEC EDGAR
---

# David R. Seiler appointed President and CEO of First Business Financial Services

## Summary
- Seiler appointed President & CEO effective May 3, 2026; also appointed to Board as Class III Director.
- Base salary of at least $600,000; eligible for annual cash incentive and long-term incentive plans.
- On May 16, 2026, receives RSU grant valued at $215,000, vesting over 5 years (15% annually first 4 years, 40% on 5th).
- Severance: termination without cause or for good reason provides 2x salary, prorated target bonus, and 18 months COBRA.
- Succeeds Corey A. Chambas, whose retirement was announced in May 2025; prior role was President & COO.

## SEC filing metadata
- accession: 0001104659-26-058671
- form_type: 8-K/A
- ticker: FBIZ
- cik: 0001521951
- company_name: FIRST BUSINESS FINANCIAL SERVICES, INC.
- filed_at: 2026-05-11T20:19:06+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.65
- calibrated_materiality_score: 0.65
- confidence: high
- sec_items: 5.02, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1521951/000110465926058671/0001104659-26-058671-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1521951/000110465926058671/tm2614120d1_8ka.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001104659-26-058671
- JSON: https://secwatch.observer/filing/0001104659-26-058671.json
- Plain text: https://secwatch.observer/filing/0001104659-26-058671.txt

## Key facts
- Executive change
  David R. Seiler was appointed as Class III Director at FIRST BUSINESS FINANCIAL SERVICES, INC..
  - Action: appointed
  - Role: Class III Director
  source text: Mr. Seiler was appointed to the Company’s Board of Directors effective May 3, 2026.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1521951/000110465926058671/0001104659-26-058671-index.htm
- Executive change
  David R. Seiler was appointed as President and Chief Executive Officer at FIRST BUSINESS FINANCIAL SERVICES, INC..
  - Action: appointed
  - Role: President and Chief Executive Officer
  source text: the Board of Directors of First Business Financial Services, Inc. (the "Company") appointed David R. Seiler as President and Chief Executive Officer of the Company, effective May 3, 2026.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1521951/000110465926058671/0001104659-26-058671-index.htm

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