Aon plc (AON)

FairStock Score: 65/100 — STEADY

Key Financials

Strengths

• Exceptional 39.37% net profit margin demonstrates pricing power and operational excellence
• 46.94% ROE reflects superior capital deployment and returns to shareholders
• Strong free cash flow generation of $3.1B with sticky, recurring revenue from insurance brokerage
• Piotroski F-Score of 8/9 indicates high financial quality and accounting integrity
• Global diversification across Americas, Europe, Asia-Pacific reduces concentration risk

Concerns

• Massive valuation disconnect: stock at $340.60 vs Graham Number of $87.87 (negative 287% margin of safety)
• Elevated leverage with debt-to-equity ratio of 1.68 limits financial flexibility
• Altman Z-Score of 1.29 indicates moderate financial distress warning zone
• EV/EBITDA of 33.45 is unsustainably high even for quality businesses; leaves no room for error
• Anemic 1.8% FCF yield offers minimal returns for risk taken

AI Analysis

Aon presents a classic case of a quality business trading at an unreasonable price. Let me be direct: at $340.60 with a Graham Number of $87.87, we're looking at a negative margin of safety of -287%. This is not Benjamin Graham's cup of tea, and frankly, it isn't mine either. However, the business itself deserves respect. With $73.2B in market cap and $3.1B in free cash flow, Aon generates substantial cash. The latest quarter shows a remarkable 39.37% net margin on $4.3B revenue—this is the hallmark of a genuinely valuable franchise with pricing power. An ROE of 46.94% demonstrates excellent capital allocation, and the Piotroski F-Score of 8/9 indicates solid financial quality. The insurance brokerage industry has durable moats: sticky client relationships, switching costs, and regulatory barriers. With 60,000 employees across global markets, Aon possesses genuine diversification and scale advantages. Yet here's my concern: the valuation is preposterous. At an EV/EBITDA of 33.45 and FCF yield of just 1.8%, you're paying an exceptional premium. The debt-to-equity of 1.68 adds leverage risk. The Altman Z-Score of 1.29 suggests moderate financial stress. I see a wonderful business at a terrible price. The beta of 0.83 provides some downside protection, but I'd need a margin of safety—at least 40-50% below current levels—before deploying capital here. Quality demands patience; pricing demands discipline.

Bull Case

Aon's dominance in insurance brokerage with 46.94% ROE and 39% margins is exceptional; if the company maintains growth through economic cycles while expanding margins further, the quality justifies a premium valuation. The global scale and recurring revenue model provide defensive characteristics during recessions, making this a stable compounder for patient capital.

Bear Case

A valuation correction of 50-60% is entirely plausible given the negative margin of safety and elevated leverage; any industry disruption or client consolidation could expose Aon's premium multiple as unjustified. Rising interest rates and economic slowdown could pressure margins while the high debt load constrains management flexibility.

Data from SEC filings. AI analysis is for educational purposes only — not investment advice. Scoring methodology · Disclaimer