Stocks / AON vs IBKR

AON vs IBKR: Which Stock Is the Better Buy?

Aon plc and Interactive Brokers Group, Inc. side by side — fundamentals from SEC filings, refreshed nightly. Sector: Financial Services.

IBKR is the larger company ($149.3B vs $76.5B). On the fundamentals, IBKR grows revenue faster (36.8% vs 9.2%); AON earns a higher net margin (21.5% vs 16.0%); AON has the stronger return on equity (39.5% vs 18.3%). 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 IBKR, 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)Interactive Brokers Group, Inc. (IBKR)
Market cap$76.5B$149.3B
Revenue (latest FY)$17.18B$6.16B
Net income (latest FY)$3.69B$984.00M
Revenue growth (5y CAGR)9.2%36.8%
Net margin21.5%16.0%
Return on equity39.5%18.3%
P/E ratio19.934.9
Dividend yield0.9%0.4%
Profitable years (of last 10)1010
Positive free cash flowYes

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See the full AON vs IBKR 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 IBKR's full financials →

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Frequently asked questions

Which is bigger, AON or IBKR?

Interactive Brokers Group, Inc. is larger by market capitalization — $149.3B versus $76.5B.

Which grows faster, AON or IBKR?

Over the last five fiscal years, Interactive Brokers Group, Inc. grew revenue faster — 36.8%/yr versus 9.2%/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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