Core dashboard

  • Written Premium - capture the reported value, direction, source, management explanation, and thesis implication.
  • Earned Premium - capture the reported value, direction, source, management explanation, and thesis implication.
  • Combined Ratio - capture the reported value, direction, source, management explanation, and thesis implication.
  • Loss Ratio - capture the reported value, direction, source, management explanation, and thesis implication.
  • Expense Ratio - capture the reported value, direction, source, management explanation, and thesis implication.
  • Policy Retention - capture the reported value, direction, source, management explanation, and thesis implication.
  • Reserve Development - capture the reported value, direction, source, management explanation, and thesis implication.
  • Book Value Per Share - capture the reported value, direction, source, management explanation, and thesis implication.
  • Return On Equity - capture the reported value, direction, source, management explanation, and thesis implication.
  • Investment Yield - capture the reported value, direction, source, management explanation, and thesis implication.

Before earnings or a filing

Review the prior quarter's expectations, unresolved questions, and thesis breakers. Record what you expect to learn from the next filing without predicting a stock-price reaction. This prevents hindsight from rewriting the original thesis.

After the filing

Start with reported statements, notes, and reconciliations. Update the dashboard, then read management discussion. Separate changes caused by volume, price, mix, currency, acquisitions, accounting, and one-time items. Reconcile cash flow and share count, not just earnings per share.

Competitive check

Compare relevant evidence with Arthur J. Gallagher & Co., Brown & Brown, Erie Indemnity, Marsh McLennan, Willis Towers Watson. Determine whether a trend is company-specific or industry-wide. Use comparable definitions and periods.

Macro check

Review interest rates, inflation, weather and catastrophe activity, economic growth, asset-market returns, litigation trends. Only elevate a macro variable when there is a defensible channel into Aon plc's demand, pricing, costs, financing, or asset values.

Change log

Maintain a dated log with four labels: fact, interpretation, scenario, and unknown. Link every time-sensitive factual change to a primary source. If a prior assumption is wrong, preserve the old entry and explain the revision rather than silently rewriting history.

References

The evergreen analysis above is anchored to verified index metadata and a filing-first research workflow. Time-sensitive financial figures should be refreshed from the latest primary filings before publication or material updates.

  • S&P Dow Jones Indices - S&P 500: https://www.spglobal.com/spdji/en/indices/equity/sp-500/
  • SEC EDGAR company filings for Aon plc: https://www.sec.gov/edgar/browse/?CIK=315293&owner=exclude&action=getcompany
  • SEC submissions JSON for CIK 315293: https://data.sec.gov/submissions/CIK0000315293.json
  • Current constituent registry snapshot used for this build: https://github.com/chinobing/historical_sp500_constituents/blob/main/sp500_constituents.csv

Source-review rule: Before publishing a statement about current revenue, margins, management, products, segment mix, guidance, market share, or capital allocation, verify it against the latest 10-K, 10-Q, 8-K, proxy statement, earnings release, or official investor-relations material. This page deliberately avoids inventing those facts when they were not present in the constituent registry used to generate the batch.