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STOCK COMPARISON

Marsh & McLennan Companies vs Aon: Fair Value & Quality

Both stocks run through our valuation models. Here is how Marsh & McLennan Companies (MRSH) and Aon (AON) compare, as of Aug 8, 2026.

As of Aug 8, 2026, Fair Value Calculator sees Aon as the less overvalued of the two: Marsh & McLennan Companies trades at $193 versus a fair value of $112 (-42%), while Aon trades at $361 versus $225 (-38%).
Marsh & McLennan Companies
MRSH · USD · Financials
-42%
upside to fair value
overvalued
Price$193
Fair Value$112
Quality63/100
Aon
AON · USD · Financials
-38%
upside to fair value
overvalued
Price$361
Fair Value$225
Quality62/100

Head-to-head numbers

Green value = the better side for that row (for valuation multiples: lower = cheaper).

Marsh & McLennan CompaniesAon
Valuation
22.8×P/E (TTM)20.2×
3.19×P/S (TTM)4.49×
5.81×P/B8.21×
13.6×EV/EBITDA15.7×
1.76×PEG3.13×
2.0%Dividend yield0.8%
$3.60Dividend per share$2.98
Profitability
14%Net margin23%
24%Operating margin36%
28%Return on equity46%
7%Return on assets6%
Growth
8%Revenue growth (YoY)7%
9.2%Avg. growth/yr (3Y)11.2%
9.4%Avg. growth/yr (5Y)9.2%
Balance & size
1.21×Debt / equity1.54×
$88BMarket cap$78B
healthyGrowth qualityhealthy

Marsh & McLennan Companies leads: 9 to 5 metric wins.

Dash = not meaningfully computable, for example with negative equity.

Quality in detail

The quality score, broken down into the same factor families as on the stock page, 0 to 100 per family.

Marsh & McLennan Companiesof which business quality 60 · market factors 57 Aonof which business quality 51 · market factors 60
ProfitabilityMargins and returns on capital today
55
57
Quality GrowthAre margins and returns improving?
50
55
CashflowEarnings quality: real cash, not paper profit
75
69
Fin. StrengthBalance sheet, leverage, solvency risk
35
8
InvestmentDisciplined investing over empire-building
62
61
Low VolatilityCalm price path (market factor)
84
81
MomentumPrice trend over the last 3–12 months (market factor)
44
48
52W MomentumDistance to the 52-week high (market factor)
50
57
Net IssuanceBuybacks instead of dilution
93
70

What the models say

The median fair value (base case) per model family, each in the currency of its trading venue. Green = above the current price, red = below.

Marsh & McLennan Companies

DCF Models$145
Earnings-Based$67.56
Dividend Discount$60.10
Multiples$150
Asset-Based$21.00
Growth DCF$135
Economic Profit$86.32
Growth Earnings$152

25 of 26 models see the stock below the current price.

Aon

DCF Models$221
Earnings-Based$110
Dividend Discount$47.62
Multiples$231
Asset-Based$29.95
Growth DCF$167
Economic Profit$174
Growth Earnings$290

25 of 25 models see the stock below the current price.

Scenario ranges

From our cautious bear case to the optimistic bull case. The white tick is the current price: left of fair value means room to run.

Marsh & McLennan Companies
Bear $84.19Fair Value $112Bull $140
$193 = current price (white tick)
Aon
Bear $169Fair Value $225Bull $281
$361 = current price (white tick)

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Ranked within their sector

Where each stock sits within its sector peer group. Band = middle 50% of peers, tick = median, dot = this stock.

Marsh & McLennan Companies · Financials

Quality score63 · above median
Fair value upside-42% · bottom 25%

Aon · Financials

Quality score62 · above median
Fair value upside-38% · below median

Bottom line

As of Aug 8, 2026, Fair Value Calculator sees Aon as the less overvalued of the two: Marsh & McLennan Companies trades at $193 versus a fair value of $112 (-42%), while Aon trades at $361 versus $225 (-38%).

Marsh & McLennan Companies has the higher quality score (63/100).

See the full analysis →
Marsh & McLennan Companies · Aon

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A model-based valuation snapshot from 21 models. Values change with price and fundamentals; the date shown above applies.