Compare StocksCMCSA vs TMO

Comcast Corporation (CMCSA) vs Thermo Fisher Scientific Inc. (TMO)

CMCSA
Comcast Corporation
$27.09
VS
TMO
Thermo Fisher Scientific Inc.
$465.39

Rewards

CMCSA
  • Gross margin of 70.1% indicates strong pricing power — typical of businesses with significant intellectual property or brand strength.
  • Comcast Corporation scores 72/100 on the Economic Moat Score (Wide Moat), with margin stability as the strongest competitive dimension.
  • Free cash flow has grown at a 15.0% CAGR over the past 4 years, demonstrating strong earnings power growth.
TMO
  • Dividend yield of 0.38% with a consistent or growing payout over the past 4 years.
  • Trailing P/E of 25.6x is 21% below the historical average of 32.3x — potentially undervalued relative to its own history.
  • Altman Z-Score of 3.85 indicates very low bankruptcy risk — the company is firmly in the safe zone.

Risks

CMCSA
  • PEG ratio of 142.98 indicates the stock is expensive relative to its expected growth — the market may be pricing in more growth than analysts project.
  • Altman Z-Score of 1.37 places the company in the distress zone — financial patterns resemble those of companies that experienced bankruptcy.
TMO
  • PEG ratio of 2.26 indicates the stock is expensive relative to its expected growth — the market may be pricing in more growth than analysts project.
  • 5 insider sales totaling $8.3M with no purchases in the past 3 months — insiders are reducing their exposure.

Key Valuation Metrics

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CMCSA
TMO
Valuation
$19.23B
Free Cash Flow
$5.52B
19.88%
FCF Yield
3.19%
5.31
Trailing P/E
25.56
7.11
Forward P/E
17.01
Quality & Moat
7.10%
ROIC
6.71%
22.59%
ROE
12.88%
70.13%
Gross Margin
40.93%
142.98
PEG Ratio
2.26
Balance Sheet Safety
1.07
Debt / Equity
0.83
N/A
Interest Coverage
N/A
2.41
Net Debt / EBITDA
3.53
4.85%
Dividend Yield
0.38%
CMCSA: 9Ties: 1TMO: 2
CMCSATMO

Historical Fundamentals

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CMCSA

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

TMO

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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CMCSA
$-1.01
created per $1 retained over 3 years
Market Cap Declined
Σ Retained
$37.10B
Δ Market Cap
$-37.35B
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
TMO
$0.17
created per $1 retained over 3 years
Value Destroyer
Σ Retained
$17.29B
Δ Market Cap
+$2.95B
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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CMCSA
72.1% Margin of Safety
Price is 72.1% below estimated fair value
Current Price: $27.09
Fair Value: $97.21
Strongly undervalued
Undervalued
Fairly valued
Overvalued
Strongly overvalued
TMO
39.4% Overvalued
Price is 39.4% above estimated fair value
Current Price: $465.39
Fair Value: $333.86
Strongly undervalued
Undervalued
Fairly valued
Overvalued
Strongly overvalued

Reverse DCF — Market-Implied Growth

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CMCSA

What growth rate is the market pricing in at $27?

-3.2%
Market-Implied Owner Earnings Growth
Standard FCF implies -2.6%

The market implies -3.2% Owner Earnings growth, below historical trends — potential opportunity.

Standard FCF implies a more demanding -2.6%, reflecting heavy growth investment expected to generate future returns.

TMO

What growth rate is the market pricing in at $465?

+14.0%
Market-Implied Owner Earnings Growth
Standard FCF implies +16.6%

The market implies +14.0% Owner Earnings growth, above historical trends.

Standard FCF implies a demanding +16.6%, reflecting heavy growth investment.

Economic Moat Score

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CMCSA
72/100
Wide Moat
70+ Wide · 40-69 Narrow · <40 None

Wide moat driven primarily by margin stability. ROIC Consistency 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 5 years of fundamental data.
TMO
60/100
Narrow Moat
70+ Wide · 40-69 Narrow · <40 None

Narrow moat with margin stability as the key competitive advantage. Improving roic consistency would strengthen the moat.

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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CMCSA
-2.73
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.
TMO
-2.47
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.

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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CMCSA
Insiders 0.8%Institutions 89.7%Retail & Other 9.6%
No. of Institutional Holders2,734
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.
TMO
Insiders 0.2%Institutions 94.9%Retail & Other 4.9%
No. of Institutional Holders3,559
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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CMCSA
0
Buys (3M)
0
Buys (12M)
No open market insider purchases found.
Open market purchases · includes direct & indirect ownership · excludes option exercises
TMO
0
Buys (3M)
0
Buys (12M)
CHAI NELSON J
Director
$11,038
@ $551.90 · 2024-12-09
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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CMCSA
1
Sells (3M)
2
Sells (12M)
Total value (12M): $388,385
ARMSTRONG JASON S
Chief Financial Officer
$142,617
@ $31.73 · 2026-03-05
NAKAHARA ASUKA
Director
$245,768
@ $29.70 · 2026-02-03
ROBERTS BRIAN L
Chief Executive Officer
$20.06M
@ $42.73 · 2024-11-27
BACON KENNETH J
Director
$625,093
@ $43.39 · 2024-11-22
ARMSTRONG JASON S
Chief Financial Officer
$1.04M
@ $44.84 · 2024-11-06
Direct ownership only · excludes indirect, option exercises, planned (10b5-1) sales & derivatives
TMO
5
Sells (3M)
22
Sells (12M)
Total value (12M): $110.73M
PETTITI GIANLUCA
President
$185,064
@ $462.66 · 2026-04-27
SHAFER MICHAEL D
Officer
$802,536
@ $499.40 · 2026-03-11
CASPER MARC N
Chief Executive Officer
$2.06M
@ $514.82 · 2026-03-05
CASPER MARC N
Chief Executive Officer
$5.08M
@ $507.75 · 2026-03-04
PETTITI GIANLUCA
Officer
$216,480
@ $541.20 · 2026-02-09
LAGARDE MICHEL
Chief Operating Officer
$12.42M
@ $563.56 · 2025-12-04
LAGARDE MICHEL
Chief Operating Officer
$36.13M
@ $582.68 · 2025-12-03
LOWERY FREDERICK M.
Officer
$8.15M
@ $589.81 · 2025-12-02
SHAFER MICHAEL D
Officer
$6.43M
@ $600.00 · 2025-11-25
LAGARDE MICHEL
Chief Operating Officer
$2.76M
@ $594.42 · 2025-11-13
BRITT LISA P
Officer
$622,136
@ $588.59 · 2025-11-12
PETTITI GIANLUCA
Officer
$1.73M
@ $580.00 · 2025-11-10
BRITT LISA P
Officer
$5.84M
@ $571.62 · 2025-11-07
CASPER MARC N
Chief Executive Officer
$13.91M
@ $571.33 · 2025-10-27
PETTITI GIANLUCA
Officer
$229,660
@ $574.15 · 2025-10-24
CASPER MARC N
Chief Executive Officer
$200,201
@ $500.50 · 2025-09-05
HOLMES JOSEPH R.
Officer
$189,662
@ $492.63 · 2025-08-29
CASPER MARC N
Chief Executive Officer
$5.01M
@ $500.96 · 2025-08-22
CASPER MARC N
Chief Executive Officer
$248,046
@ $500.09 · 2025-08-20
CASPER MARC N
Chief Executive Officer
$8.15M
@ $452.99 · 2025-08-07
PETTITI GIANLUCA
Officer
$191,992
@ $479.98 · 2025-07-25
PETTITI GIANLUCA
Officer
$164,444
@ $411.11 · 2025-05-12
PETTITI GIANLUCA
Officer
$128,979
@ $429.93 · 2025-04-28
BOXER MICHAEL A
General Counsel
$2.01M
@ $532.59 · 2025-03-10
CASPER MARC N
Chief Executive Officer
$9.33M
@ $518.16 · 2025-03-05
SHAFER MICHAEL D
Officer
$945,038
@ $530.92 · 2025-03-03
LOWERY FREDERICK M.
Officer
$9.73M
@ $531.81 · 2025-02-24
CHAI NELSON J
Director
$8,449
@ $528.06 · 2025-02-19
PETTITI GIANLUCA
Officer
$175,677
@ $585.59 · 2025-02-04
WILLIAMSON STEPHEN
Chief Financial Officer
$11.58M
@ $589.36 · 2025-02-04
CASPER MARC N
Chief Executive Officer
$10.62M
@ $531.23 · 2024-12-03
CASPER MARC N
Chief Executive Officer
$3.26M
@ $557.89 · 2024-11-01
CASPER MARC N
Chief Executive Officer
$11.01M
@ $550.51 · 2024-10-31
CASPER MARC N
Chief Executive Officer
$11.05M
@ $552.46 · 2024-10-29
BOXER MICHAEL A
General Counsel
$1.12M
@ $560.16 · 2024-10-25
PETTITI GIANLUCA
Officer
$168,048
@ $560.16 · 2024-10-25
CASPER MARC N
Chief Executive Officer
$12.17M
@ $608.45 · 2024-09-04
CASPER MARC N
Chief Executive Officer
$6.17M
@ $617.21 · 2024-07-31
CASPER MARC N
Chief Executive Officer
$9.88M
@ $606.12 · 2024-07-30
BRITT LISA P
Officer
$2.22M
@ $613.02 · 2024-07-26
BOXER MICHAEL A
General Counsel
$1.20M
@ $600.85 · 2024-07-26
PETTITI GIANLUCA
Officer
$180,255
@ $600.85 · 2024-07-26
HOLMES JOSEPH R.
Officer
$525,484
@ $611.03 · 2024-07-26
CASPER MARC N
Chief Executive Officer
$11.37M
@ $568.72 · 2024-06-04
LAGARDE MICHEL
Chief Operating Officer
$11.80M
@ $590.05 · 2024-05-14
WILLIAMSON STEPHEN
Chief Financial Officer
$12.96M
@ $591.27 · 2024-05-13
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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CMCSA
FearGreed
😐Neutral(42/100)

"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.
TMO
FearGreed
😨Fear(37/100)

"Market is pessimistic — investigate whether fears are temporary or structural"

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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CMCSA
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 (42)
TMO
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: Fear (37)
View CMCSA Full AnalysisView TMO Full Analysis
CMCSA vs TMO: Which Is the Better Buy? | SafetyMargin.io