Stocks / AON vs KEY

AON vs KEY: Which Stock Is the Better Buy?

Aon plc and KeyCorp side by side — fundamentals from SEC filings, refreshed nightly. Sector: Financial Services.

AON is the larger company ($76.5B vs $24.2B). On the fundamentals, AON grows revenue faster (9.2% vs 2.3%); KEY earns a higher net margin (22.4% vs 21.5%); AON has the stronger return on equity (39.5% vs 8.3%). Neither shows an obvious red flag in the filings. Full numbers below — the stronger figure on each row is in green.

AI verdict — AON vs KEY, read from the filings

The stronger business, the cheaper stock, and the risks — synthesised from both companies’ SEC filings, every figure computed not guessed. Not investment advice.

 Aon plc (AON)KeyCorp (KEY)
Market cap$76.5B$24.2B
Revenue (latest FY)$17.18B$7.51B
Net income (latest FY)$3.69B$1.69B
Revenue growth (5y CAGR)9.2%2.3%
Net margin21.5%22.4%
Return on equity39.5%8.3%
P/E ratio19.913.2
Dividend yield0.9%3.6%
Profitable years (of last 10)109
Positive free cash flowYesYes

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Use the filing period and source shown by each tool before treating two figures as comparable.

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See the full AON vs KEY breakdown

Both companies across 19 years of income statement, balance sheet and cash flow — with ratios, health checks and Ask, the SEC-grounded research assistant. Free, no account needed.

Open AON's full financials →   Open KEY's full financials →

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Frequently asked questions

Which is bigger, AON or KEY?

Aon plc is larger by market capitalization — $76.5B versus $24.2B.

Which grows faster, AON or KEY?

Over the last five fiscal years, Aon plc grew revenue faster — 9.2%/yr versus 2.3%/yr, computed from SEC-filed statements.

Where does this data come from?

All figures are computed from official SEC filings (10-K), refreshed nightly. This is a data comparison, not investment advice.

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