AON vs BRK.B
AON: Global professional services and risk advisory firm connecting clients with analytics-driven solutions across insurance, reinsurance, and human capital management. BRK.B: A diversified holding company that operates through insurance, railroads, utilities, energy, and manufacturing while managing a massive equity securities portfolio.
Side-by-side fundamentals
| Metric | AON | BRK.B | Edge |
|---|---|---|---|
| Price as of 2026-07-15 close | $355.15 | $488.35 | |
| Market cap as of 2026-07-16 | $76.3B | $1.05T | |
| P/E as of 2026-07-16 | 19.36 | 14.54 | BRK.B lower |
| PEG as of 2026-07-16 | 1.78 | n/a | |
| Net margin as of 2026-07-16 | +22.5% | +19.3% | AON higher |
| Gross margin as of 2026-07-16 | +47.8% | +24.8% | AON higher |
| Operating margin as of 2026-07-16 | +33.8% | +12.5% | AON higher |
| ROE as of 2026-07-16 | +45.1% | +10.3% | AON higher |
| ROA as of 2026-07-16 | +7.6% | +6.0% | AON higher |
| Debt / equity as of 2026-07-16 | 1.49 | 0.18 | BRK.B lower |
| Revenue growth (YoY) as of 2026-07-16 | +6.9% | +1.1% | AON higher |
| Revenue CAGR (3y) SEC XBRL | +11.2% | +7.1% | AON higher |
| Dividend yield as of 2026-07-16 | +0.9% | n/a | |
| Dividend streak (yrs) SEC XBRL | 4 | n/a | |
| Beta as of 2026-07-16 | 0.69 | 0.12 | |
| 1-year return as of 2026-07-15 close | -0.3% | +4.0% | BRK.B higher |
Fundamentals: Finnhub, as of 2026-07-16. Filings: SEC EDGAR. Prices are delayed daily-close data.
Last updated 2026-07-15.
Informational only — NOT financial advice. All figures are delayed daily-close data from SEC EDGAR & Finnhub, shown with their as-of date; "Edge" cells are a pure numeric comparison, not a recommendation.