---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-25-168037"
form_type: "8-K"
ticker: "AON"
cik: "0000315293"
company_name: "Aon plc"
filed_at: "2025-07-29T23:59:59+00:00"
generated_at: "2026-05-17T23:51:04.158335+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.65
calibrated_materiality_score: 0.65
confidence: "high"
source: SEC EDGAR
---

# Aon appoints David DeBrunner as CAO effective Sept 15, 2025; base salary $500k

## Summary
- David DeBrunner to join as SVP, Global Controller and Chief Accounting Officer on September 15, 2025.
- DeBrunner previously VP, Controller and CAO at Ally Financial since 2007.
- Base salary $500,000/year; target annual incentive 100% of base starting 2026.
- Sign-on bonus up to $2.1M paid in installments; clawback if voluntary termination or cause within 2 years.
- Succeeds Michael Neller, who becomes Deputy Global Chief People Officer and Head of Total Rewards.

## SEC filing metadata
- accession: 0001193125-25-168037
- form_type: 8-K
- ticker: AON
- cik: 0000315293
- company_name: Aon plc
- filed_at: 2025-07-29T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.65
- calibrated_materiality_score: 0.65
- confidence: high
- sec_items: 5.02
- EDGAR index: https://www.sec.gov/Archives/edgar/data/315293/000119312525168037/0001193125-25-168037-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/315293/000119312525168037/d134233d8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-25-168037
- JSON: https://secwatch.observer/filing/0001193125-25-168037.json
- Plain text: https://secwatch.observer/filing/0001193125-25-168037.txt

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