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Aon plc
AON - Company ID 0000315293
Market cap$75.97 B
Rank#219
Filings1,000
Market capitalization of Aon plc
As of 2026-07-09, Aon plc (AON) has a market capitalization of $75.97 B, making it the #219 most valuable US-listed company.
Recent market cap readings
| Date | Market cap |
|---|---|
| 2026-07-09 | $75.97 B |
| 2026-07-08 | $76.36 B |
| 2026-07-07 | $76.85 B |
| 2026-07-06 | $76.02 B |
| 2026-07-05 | $76.35 B |
| 2026-07-04 | $76.35 B |
| 2026-07-03 | $76.35 B |
| 2026-07-02 | $75.85 B |
| 2026-07-01 | $73.38 B |
| 2026-06-30 | $69.68 B |
| 2026-06-29 | $69.24 B |
| 2026-06-28 | $70.20 B |
Market Cap of similar companies
Frequently asked questions
What is Aon plc's market cap?
As of 2026-07-09, Aon plc (AON) has a market capitalization of $75.97 B, making it the #219 most valuable US-listed company.
Where does Aon plc rank by market cap?
Aon plc is the #219 largest US-listed company by market capitalization.
Data parsed from SEC EDGAR XBRL filings. See the full market cap rankings.