---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-26-394533"
form_type: "8-K"
ticker: "AON"
cik: "0000315293"
company_name: "Aon plc"
filed_at: "2026-09-17T21:21:06+00:00"
generated_at: "2026-09-17T21:22:41.439332+00:00"
event_type: "debt"
sentiment: "neutral"
materiality_score: 0.75
calibrated_materiality_score: 0.75
confidence: "high"
source: SEC EDGAR
---

# Aon issues $13.5B in senior notes to fund USI acquisition; net proceeds ~$13.4B

## Summary
- Issued $11.5B USI acquisition notes: $2B 5.35% 2029, $3B 5.625% 2031, $2B 5.8% 2033, $2.75B 5.95% 2036.
- Also issued $1B 6.10% 2038, $0.75B 6.45% 2046, and $2B 6.45% 2056; total $13.5B.
- Net proceeds ~$13.4B to fund USI acquisition cash consideration, repay USI debt, and fees.
- If USI acquisition not consummated by June 1, 2027 (extendable), USI notes redeemable at 101%.

## SEC filing metadata
- accession: 0001193125-26-394533
- form_type: 8-K
- ticker: AON
- cik: 0000315293
- company_name: Aon plc
- filed_at: 2026-09-17T21:21:06+00:00
- event_type: debt
- sentiment: neutral
- materiality_score: 0.75
- calibrated_materiality_score: 0.75
- confidence: high
- sec_items: 8.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/315293/000119312526394533/0001193125-26-394533-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/315293/000119312526394533/d105587d8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-26-394533
- JSON: https://secwatch.observer/filing/0001193125-26-394533.json
- Plain text: https://secwatch.observer/filing/0001193125-26-394533.txt

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