Aon (AON) Valuation Check as Lawsuit Targets Howden Over Alleged Talent Raid and Data Misuse

Simply Wall St

Aon (AON) has escalated its rivalry with Howden into the courts, alleging a coordinated raid on its US brokerage talent and confidential data that pulled more than 45 employees toward the competitor.

See our latest analysis for Aon.

Despite the legal flare up with Howden and a steady drumbeat of operational updates, Aon’s latest share price of $353.79 leaves it roughly flat year to date on a share price return basis. At the same time, a solid five year total shareholder return of about 76 percent suggests the longer term compounding story remains intact even as near term momentum looks subdued.

If this kind of competitive tension has you rethinking your portfolio mix, it could be a good moment to broaden your search and explore fast growing stocks with high insider ownership.

With shares largely treading water this year and analysts still seeing upside to their targets, investors face a familiar dilemma: is Aon quietly undervalued here, or is the market already factoring in its next leg of growth?

Most Popular Narrative: 11.7% Undervalued

With Aon’s shares last closing at $353.79 against a narrative fair value near $400.50, the story leans toward upside if execution holds.

Aon's 3x3 Plan and the deployment of Risk Analyzers have increased new business and improved client retention, strengthening the foundation for ongoing revenue growth and margin expansion.

Investment in priority hires and expanding Aon Business Services (ABS) capabilities are creating capacity to fund growth initiatives and drive operational efficiencies, benefiting net margins and earnings.

Read the complete narrative.

Curious how steady mid single digit growth, rising margins and a premium future earnings multiple can still imply upside for a mature broker? The narrative lays out a detailed roadmap of compounding cash flows, capital returns and shrinking share count that must all line up to justify that valuation path.

Result: Fair Value of $400.50 (UNDERVALUED)

Have a read of the narrative in full and understand what's behind the forecasts.

However, stubborn macro volatility and softer commercial risk pricing could derail those bullish assumptions if client budgets tighten and insurance markets weaken further.

Find out about the key risks to this Aon narrative.

Another Angle on Valuation

Viewed through its earnings multiple, Aon looks far less forgiving. The stock trades on about 28 times earnings, richer than both the US insurance industry at roughly 13 times and close peers at 26.5 times, and well above a fair ratio near 15.7 times that the market could gravitate toward over time.

That gap suggests less of a bargain and more of a valuation tightrope, where any stumble in growth or margins could trigger a painful reset rather than a gentle de rating. How confident are you that execution will keep justifying this premium?

See what the numbers say about this price — find out in our valuation breakdown.

NYSE:AON PE Ratio as at Dec 2025

Build Your Own Aon Narrative

If this framework does not match your own view or you prefer to dig into the numbers yourself, you can build a fresh narrative in minutes, Do it your way.

A great starting point for your Aon research is our analysis highlighting 3 key rewards and 2 important warning signs that could impact your investment decision.

Looking for more investment ideas?

Before you move on, lock in your next smart move by hunting for fresh opportunities that match your style, instead of waiting for the market to surprise you.

This article by Simply Wall St is general in nature. We provide commentary based on historical data and analyst forecasts only using an unbiased methodology and our articles are not intended to be financial advice. It does not constitute a recommendation to buy or sell any stock, and does not take account of your objectives, or your financial situation. We aim to bring you long-term focused analysis driven by fundamental data. Note that our analysis may not factor in the latest price-sensitive company announcements or qualitative material. Simply Wall St has no position in any stocks mentioned.

Valuation is complex, but we're here to simplify it.

Discover if Aon might be undervalued or overvalued with our detailed analysis, featuring fair value estimates, potential risks, dividends, insider trades, and its financial condition.

Access Free Analysis

Have feedback on this article? Concerned about the content? Get in touch with us directly. Alternatively, email editorial-team@simplywallst.com