Aon plc (AON)

About Aon plc

Aon plc is a global professional services firm that provides risk management, insurance brokerage, reinsurance, and human capital consulting services. Its main business segments are Risk Capital, which offers insurance and reinsurance brokerage and consulting, and Human Capital, which delivers health, benefits, talent advisory, and retirement consulting services. Aon serves clients in over 120 countries across various industries and market segments.

Snapshot

Fundamentals are from SEC filings for FY2025, the latest annual period (ended December 31, 2025). P/E and market cap are derived from stored market prices, last retrieved on a rolling basis and typically within the past week.

Peer comparison

Where Aon’s fundamentals sit among the 88 insurance companies. Each figure is ranked only against peers that report it, from lowest (left) to highest (right).

Aon’s return on equity of 39.1% ranks in the 99th percentile of the 73 insurance companies reporting it. Aon’s long-term debt to equity of 1.55 ranks in the 94th percentile of the 48 insurance companies reporting it. Aon’s operating margin of 25.3% ranks in the 85th percentile of the 27 insurance companies reporting it.

6 reported insider purchases (code P) totaling $6.5M in the last 90 days, against 7 sales totaling $1.7M. For context, about 14% of companies in the universe saw any reported insider purchase (code P) in the same window. Browse insider activity →

Percentiles describe where a figure sits among industry peers reporting it (100th = highest). They are position within a peer group, not a rating, and not investment advice. Short interest ranking uses days to cover from FINRA Consolidated Short Interest data; FINRA is the owner and source of that data, included at no additional charge.

Recent insider activity

Non-derivative buys and sells (codes P/S) reported by officers, directors and 10% owners on SEC Form 4.

Reported non-derivative purchases and sales (codes P/S) — which may be open-market or private; excludes option exercises, grants, and shares withheld for taxes. Dates shown are the trade date; a Form 4 can be filed days to years later. A sale can be routine (e.g. a pre-set 10b5-1 plan), so read individual transactions in context. From SEC Form 4. Not investment advice.

Short interest

Total shares sold short as of each twice-monthly FINRA settlement. Rising short interest means more investors are positioned against the stock; days to cover estimates how many trading days of average volume that position represents.

Source: FINRA Consolidated Short Interest. FINRA is the owner and source of the FINRA-supplied data, which is included at no additional charge for your own personal or professional use; republishing or redistributing it is not permitted. Settlement dates are shown; FINRA publishes each settlement about nine business days later, so the latest figure can be two to four weeks old. Not presented as a percentage of float. No FINRA endorsement of this product is implied. Not investment advice.

Quarterly trend (as reported)

Latest 8 reported quarters, from company XBRL filings on SEC EDGAR.

Company facts

Selected SEC filings

Largest insurance peers

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AON head to head