Aon plc Market Cap

Data as of June 01, 2026

How It's Calculated

What This Means

Aon plc has a market capitalization of $67.50B, classifying it as Large Cap — a major company by market standards. Market cap represents the total value of all outstanding shares and is a key indicator of a company's size.

About Aon plc

Aon plc (AON) operates in the Financial Services sector, specifically in Insurance Brokers. With a market capitalization of about $67.50B, it ranks as a large-cap stock — a major established company.

Shares recently traded near $316.06, within a 52-week range of $304.59 to $381.00 (-17.0% from the high, +3.8% from the low). Beta of 0.71 indicates relatively lower volatility versus the market.

Trailing profit margin is about 22.5%, signaling a solid profit margin for its industry.

Understanding This Metric

Market capitalization sums the market value of all outstanding shares. It helps classify Aon plc by size — mega-cap, large-cap, and mid-cap stocks tend to have different liquidity, volatility, and index inclusion profiles. Size alone does not determine quality, but it frames risk and how widely the stock is held.

Sector Comparison

Among Financial Services names on our S&P 100 coverage, Aon plc's market cap of $67.50B can be compared with peers such as BRK-B ($1.02T), JPM ($802.00B), V ($620.65B). Sector context helps interpretation, but each company's growth profile and balance sheet differ — use multiple metrics before drawing conclusions. View all Financial Services stocks.

Key Takeaways

• AON is grouped in the Financial Services sector for peer comparisons.
• Recent beta of 0.71 suggests lower-than-market price sensitivity.
• Trailing profit margin of 22.5% provides context for how much earnings support the headline multiple.

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