Compare StocksAON vs MS

Aon plc (AON) vs Morgan Stanley (MS)

AON
Aon plc
$311.51
VS
MS
Morgan Stanley
$190.17

Rewards

AON
  • Aon plc has maintained ROIC above 10% for 4 consecutive years, suggesting solid business economics.
  • Aon plc scores 90/100 on the Economic Moat Score (Wide Moat), with reinvestment efficiency as the strongest competitive dimension.
  • Each dollar of retained earnings has created $1.70 of earning power — management is creating shareholder value.
MS
  • Gross margin of 87.4% indicates strong pricing power — typical of businesses with significant intellectual property or brand strength.
  • Morgan Stanley scores 80/100 on the Economic Moat Score (Wide Moat), with revenue predictability as the strongest competitive dimension.
  • Each dollar of retained earnings has created $3.11 of earning power — management is an exceptional capital allocator.

Risks

AON
  • FCF yield of 5.0% suggests reasonable valuation assuming continued moderate growth.
  • Altman Z-Score of 1.80 places the company in the distress zone — financial patterns resemble those of companies that experienced bankruptcy.
MS
  • High leverage (4.56x debt/equity) combined with thin interest coverage (-1.0x) poses financial risk.
  • Altman Z-Score of 0.29 places the company in the distress zone — financial patterns resemble those of companies that experienced bankruptcy.
  • Insiders have sold $17.7M worth of stock in the past 3 months — significant insider liquidation.

Key Valuation Metrics

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AON
MS
Valuation
$3.34B
Free Cash Flow
N/A
5.02%
FCF Yield
N/A
18.31
Trailing P/E
17.21
14.55
Forward P/E
15.02
Quality & Moat
19.45%
ROIC
3.75%
37.02%
ROE
14.42%
47.34%
Gross Margin
87.39%
0.68
PEG Ratio
0.54
Balance Sheet Safety
1.55
Debt / Equity
4.56
N/A
Interest Coverage
N/A
2.44
Net Debt / EBITDA
N/A
1.05%
Dividend Yield
2.10%
AON: 3Ties: 2MS: 4
AONMS

Historical Fundamentals

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AON

Price ÷ Earnings Per Share — how many years of current earnings you're paying for at today's price. Lower P/E may indicate undervaluation.

MS

Price ÷ Earnings Per Share — how many years of current earnings you're paying for at today's price. Lower P/E may indicate undervaluation.

Price ÷ Earnings Per Share — how many years of current earnings you're paying for at today's price. Lower P/E may indicate undervaluation.

$1 Retained Earnings Test

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AON
$1.94
created per $1 retained over 3 years
Value Creator
Σ Retained
$7.23B
Δ Market Cap
+$14.04B
Buffett's "$1 Test": For every $1 of earnings retained, has management created at least $1 of market value?
> $1 created per $1 retained = Value Creator · < $1 created = Value Destroyer
MS
$6.65
created per $1 retained over 3 years
Exceptional Value Creator
Σ Retained
$20.84B
Δ Market Cap
+$138.59B
Buffett's "$1 Test": For every $1 of earnings retained, has management created at least $1 of market value?
> $1 created per $1 retained = Value Creator · < $1 created = Value Destroyer

Buffett's "$1 Test": For every $1 of earnings retained, has management created at least $1 of market value?
> $1 created per $1 retained = Value Creator · < $1 created = Value Destroyer

Discounted Cash Flow (DCF) Analysis

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AON
26.0% Margin of Safety
Price is 26.0% below estimated fair value
Current Price: $311.51
Fair Value: $420.88
Strongly undervalued
Undervalued
Fairly valued
Overvalued
Strongly overvalued
MS
31.0% Margin of Safety
Price is 31.0% below estimated fair value
Current Price: $190.17
Fair Value: $275.48
Strongly undervalued
Undervalued
Fairly valued
Overvalued
Strongly overvalued

Reverse DCF — Market-Implied Growth

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AON

What growth rate is the market pricing in at $312?

+8.9%
Market-Implied Owner Earnings Growth
Standard FCF implies +10.3%

The market implies +8.9% Owner Earnings growth, below historical trends — potential opportunity.

Standard FCF implies a more demanding +10.3%, reflecting heavy growth investment expected to generate future returns.

MS

Requires positive FCF to compute implied growth rate.

Economic Moat Score

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AON
90/100
Wide Moat
70+ Wide · 40-69 Narrow · <40 None

Wide moat with strength across all dimensions. Reinvestment Efficiency is the standout factor.

Composite score measuring competitive advantage durability across four dimensions: returns above cost of capital, pricing power stability, revenue predictability, and capital efficiency. Based on 4 years of fundamental data.
MS
80/100
Wide Moat
70+ Wide · 40-69 Narrow · <40 None

Wide moat driven primarily by revenue predictability. Margin Stability is the area most vulnerable to competitive pressure.

Composite score measuring competitive advantage durability across four dimensions: returns above cost of capital, pricing power stability, revenue predictability, and capital efficiency. Based on 4 years of fundamental data.

Forensic Accounting

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AON
-2.36
Unlikely Manipulator
Above -1.78 = likely manipulator · -2.22 to -1.78 = grey zone

M-Score Trend

Beneish's 8-variable model estimates the probability of earnings manipulation. An M-Score above -1.78 signals elevated risk — companies in this range have historically been 3-5× more likely to be manipulating earnings. Scores between -2.22 and -1.78 fall in a grey zone warranting further investigation.
MS
-2.09
Possible Manipulator
Above -1.78 = likely manipulator · -2.22 to -1.78 = grey zone

M-Score Trend

Beneish's 8-variable model estimates the probability of earnings manipulation. An M-Score above -1.78 signals elevated risk — companies in this range have historically been 3-5× more likely to be manipulating earnings. Scores between -2.22 and -1.78 fall in a grey zone warranting further investigation.

Beneish's 8-variable model estimates the probability of earnings manipulation. An M-Score above -1.78 signals elevated risk — companies in this range have historically been 3-5× more likely to be manipulating earnings. Scores between -2.22 and -1.78 fall in a grey zone warranting further investigation.

Ownership Breakdown

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AON
Insiders 2.9%Institutions 89.5%Retail & Other 7.7%
No. of Institutional Holders1,727
High insider ownership aligns management incentives with shareholders — a key signal in Buffett-style analysis. Institutional concentration can indicate smart-money conviction but also crowding risk.
MS
Insiders 24.3%Institutions 63.0%Retail & Other 12.8%
No. of Institutional Holders3,167
High insider ownership aligns management incentives with shareholders — a key signal in Buffett-style analysis. Institutional concentration can indicate smart-money conviction but also crowding risk.

High insider ownership aligns management incentives with shareholders. Institutional concentration can indicate smart-money conviction but also crowding risk.

Insider Buying Activity

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AON
1
Buys (3M)
1
Buys (12M)
Total value (12M): $1.28M
KNIGHT LESTER B III
Director
$1.28M
@ $319.24 · 2026-02-10
SPRUELL BYRON
Director
$246,558
@ $340.08 · 2024-08-28
Open market purchases · includes direct & indirect ownership · excludes option exercises
MS
0
Buys (3M)
1
Buys (12M)
Total value (12M): $5,630
PETERSON DOUGLAS L
Director
$5,630
@ $156.39 · 2025-10-17
Open market purchases · includes direct & indirect ownership · excludes option exercises

Open market purchases · includes direct & indirect ownership · excludes option exercises.

Insider Selling Activity

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AON
2
Sells (3M)
3
Sells (12M)
Total value (12M): $6.09M
ZEIDEL DARREN
General Counsel
$1.42M
@ $329.72 · 2026-02-26
ZEIDEL DARREN
General Counsel
$1.64M
@ $325.79 · 2026-02-17
ZEIDEL DARREN
General Counsel
$3.03M
@ $344.52 · 2025-11-05
SIMON MINDY F
Chief Operating Officer
$256,321
@ $394.34 · 2024-11-27
STEVENS LISA
Officer
$494,295
@ $387.68 · 2024-11-26
ZEIDEL DARREN
General Counsel
$312,688
@ $329.15 · 2024-08-12
STEVENS LISA
Officer
$131,580
@ $328.95 · 2024-08-12
ZEIDEL DARREN
General Counsel
$2.05M
@ $310.00 · 2024-07-26
Direct ownership only · excludes indirect, option exercises, planned (10b5-1) sales & derivatives
MS
4
Sells (3M)
17
Sells (12M)
Total value (12M): $74.11M
GROSSMAN ERIC F
Officer
$2.12M
@ $190.75 · 2026-04-20
SIMKOWITZ DANIEL A
President
$2.78M
@ $189.24 · 2026-04-17
CRAWLEY MANDELL L.
Officer
$3.04M
@ $188.22 · 2026-04-16
SAPERSTEIN ANDREW MICHAEL
President
$9.74M
@ $188.59 · 2026-04-16
SIMKOWITZ DANIEL A
President
$6.02M
@ $182.61 · 2026-01-30
CRAWLEY MANDELL L.
Officer
$1.44M
@ $183.45 · 2026-01-20
YESHAYA SHARON
Chief Financial Officer
$2.94M
@ $185.77 · 2026-01-20
SMITH CHARLES AUBREY III
Officer
$1.55M
@ $182.08 · 2026-01-20
PIZZI MICHAEL A
Officer
$3.69M
@ $184.55 · 2026-01-20
SAPERSTEIN ANDREW MICHAEL
President
$5.57M
@ $183.62 · 2026-01-20
GROSSMAN ERIC F
Officer
$3.97M
@ $184.00 · 2026-01-20
PICK EDWARD N.
Chief Executive Officer
$16.43M
@ $164.34 · 2025-10-31
SMITH CHARLES AUBREY III
Officer
$2.81M
@ $140.30 · 2025-07-17
PIZZI MICHAEL A
Officer
$2.53M
@ $140.62 · 2025-07-17
GROSSMAN ERIC F
Officer
$1.69M
@ $141.12 · 2025-07-17
SIMKOWITZ DANIEL A
President
$4.09M
@ $141.13 · 2025-07-17
SIMKOWITZ DANIEL A
President
$3.70M
@ $127.37 · 2025-05-12
SAPERSTEIN ANDREW MICHAEL
President
$4.80M
@ $120.00 · 2025-05-02
HERZ ROBERT H
Director
$95,459
@ $119.32 · 2025-05-02
GROSSMAN ERIC F
Officer
$1.12M
@ $111.65 · 2025-04-15
CRAWLEY MANDELL L.
Officer
$1.15M
@ $138.06 · 2025-01-22
PIZZI MICHAEL A
Officer
$2.52M
@ $136.92 · 2025-01-21
SAPERSTEIN ANDREW MICHAEL
President
$4.20M
@ $136.43 · 2025-01-21
GROSSMAN ERIC F
Officer
$1.78M
@ $136.20 · 2025-01-21
SIMKOWITZ DANIEL A
President
$5.00M
@ $136.61 · 2025-01-21
AKRAM RAJA
Chief Financial Officer
$2.38M
@ $136.01 · 2025-01-21
CRAWLEY MANDELL L.
Officer
$368,375
@ $105.25 · 2024-07-26
AKRAM RAJA
Officer
$797,764
@ $106.37 · 2024-07-18
HERZ ROBERT H
Director
$106,621
@ $106.62 · 2024-07-17
SIMKOWITZ DANIEL A
President
$4.26M
@ $106.54 · 2024-07-17
CRAWLEY MANDELL L.
Officer
$692,663
@ $99.61 · 2024-05-14
Direct ownership only · excludes indirect, option exercises, planned (10b5-1) sales & derivatives

Direct ownership only · excludes indirect, option exercises, planned (10b5-1) sales & derivatives.

🎭 Mr. Market's Mood

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AON
FearGreed
😐Neutral(41/100)

"Market is pricing this stock without strong emotion in either direction"

Composite sentiment score based on 6 market signals. Inspired by Buffett's "Mr. Market" allegory — fear = potential opportunity, greed = potential risk. Must be used alongside fundamental analysis, not in isolation.
MS
FearGreed
😏Greed(71/100)

"Market is optimistic — be cautious and ensure you have a margin of safety"

Composite sentiment score based on 6 market signals. Inspired by Buffett's "Mr. Market" allegory — fear = potential opportunity, greed = potential risk. Must be used alongside fundamental analysis, not in isolation.

Composite sentiment score based on market signals. Inspired by Buffett’s "Mr. Market" allegory — fear = potential opportunity, greed = potential risk. Must be used alongside fundamental analysis, not in isolation.

⚖️ Buffett Signal

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AON
Awaiting DCF Data

The Buffett Signal cross-references market sentiment with DCF valuation. Configure the DCF Analysis above to generate a signal.

DCF Margin of Safety: N/AMr. Market's Mood: Neutral (41)
MS
Awaiting DCF Data

The Buffett Signal cross-references market sentiment with DCF valuation. Configure the DCF Analysis above to generate a signal.

DCF Margin of Safety: N/AMr. Market's Mood: Greed (71)
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AON vs MS: Which Is the Better Buy? | SafetyMargin.io