Compare StocksCMCSA vs COST

Comcast Corporation (CMCSA) vs Costco Wholesale Corporation (COST)

CMCSA
Comcast Corporation
$27.16
VS
COST
Costco Wholesale Corporation
$1011.70

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.
COST
  • Costco Wholesale Corporation has maintained ROIC above 15% for 4 consecutive years, indicating a durable competitive advantage.
  • Costco Wholesale Corporation scores 96/100 on the Economic Moat Score (Wide Moat), with roic consistency as the strongest competitive dimension.
  • Free cash flow has grown at a 30.8% CAGR over the past 4 years, demonstrating strong earnings power growth.

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.
COST
  • Gross margin of 12.9% is low, suggesting a competitive or commodity-like market with limited pricing power.
  • Despite buyback spending, shares outstanding increased in 3 out of 4 years — stock-based compensation is offsetting repurchases.
  • FCF yield of 1.5% is below 3%, meaning the market is pricing in substantial future growth to justify the current price.

Key Valuation Metrics

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CMCSA
COST
Valuation
$19.23B
Free Cash Flow
$6.69B
19.82%
FCF Yield
1.49%
5.33
Trailing P/E
52.64
7.13
Forward P/E
45.02
Quality & Moat
7.10%
ROIC
30.54%
22.59%
ROE
47.71%
70.13%
Gross Margin
12.93%
142.98
PEG Ratio
1.16
Balance Sheet Safety
1.07
Debt / Equity
0.60
N/A
Interest Coverage
N/A
2.41
Net Debt / EBITDA
-0.07
4.85%
Dividend Yield
0.58%
CMCSA: 6Ties: 1COST: 5
CMCSACOST

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.

COST

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
COST
$19.41
created per $1 retained over 3 years
Exceptional Value Creator
Σ Retained
$9.28B
Δ Market Cap
+$180.14B
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: $27.16
Fair Value: $97.21
Strongly undervalued
Undervalued
Fairly valued
Overvalued
Strongly overvalued
COST
129.0% Overvalued
Price is 129.0% above estimated fair value
Current Price: $1011.70
Fair Value: $441.80
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.

COST

What growth rate is the market pricing in at $1012?

+21.6%
Market-Implied Owner Earnings Growth
Standard FCF implies +24.3%

The market implies +21.6% Owner Earnings growth, above historical trends.

Standard FCF implies a demanding +24.3%, 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.
COST
96/100
Wide Moat
70+ Wide · 40-69 Narrow · <40 None

Wide moat with strength across all dimensions. ROIC Consistency 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.

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.
COST
-2.65
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.
COST
Insiders 0.2%Institutions 72.6%Retail & Other 27.2%
No. of Institutional Holders5,063
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
COST
0
Buys (3M)
0
Buys (12M)
No open market insider purchases found.
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
COST
2
Sells (3M)
15
Sells (12M)
Total value (12M): $23.76M
FRATES CATON
Officer
$695,100
@ $993.00 · 2026-04-01
ADAMO CLAUDINE
Officer
$732,205
@ $1003.02 · 2026-03-09
JONES TERESA A
Officer
$838,318
@ $986.26 · 2026-01-21
DECKER SUSAN LYNNE
Director
$437,390
@ $955.00 · 2026-01-16
KLAUER JAMES C
Officer
$1.41M
@ $939.00 · 2026-01-14
POLIT JAVIER
Officer
$2.26M
@ $866.38 · 2025-12-30
WILCOX WILLIAM RICHARD
Officer
$2.23M
@ $930.13 · 2025-11-07
ADAMO CLAUDINE
Officer
$2.53M
@ $935.68 · 2025-10-24
BARBRE TIFFANY MARIE
Divisional Officer
$1.16M
@ $934.91 · 2025-10-24
FRATES CATON
Officer
$1.40M
@ $910.02 · 2025-09-29
JONES TERESA A
Officer
$595,230
@ $992.05 · 2025-08-20
RUBANENKO YORAM B.
Officer
$3.90M
@ $974.96 · 2025-07-14
DECKER SUSAN LYNNE
Director
$536,058
@ $980.00 · 2025-06-18
CALLANS PATRICK J
Officer
$3.01M
@ $1002.77 · 2025-06-09
RIEL PIERRE
Officer
$2.03M
@ $1014.15 · 2025-06-06
KLAUER JAMES C
Officer
$3.92M
@ $981.07 · 2025-04-17
MILLERCHIP GARY
Officer
$1.03M
@ $940.01 · 2025-03-27
ADAMO CLAUDINE
Officer
$830,304
@ $922.56 · 2025-03-24
FRATES CATON
Officer
$765,213
@ $900.25 · 2025-03-18
VACHRIS ROLAND MICHAEL
Chief Executive Officer
$3.35M
@ $931.00 · 2025-03-11
GALANTI RICHARD ALAN
Officer and Director
$1.27M
@ $894.97 · 2024-10-24
JONES TERESA A
Officer
$717,236
@ $896.54 · 2024-10-23
RIEL PIERRE
Officer
$1.79M
@ $896.71 · 2024-10-15
CALLANS PATRICK J
Officer
$2.23M
@ $893.94 · 2024-09-30
ADAMO CLAUDINE
Officer
$2.84M
@ $888.99 · 2024-09-30
FRATES CATON
Officer
$1.50M
@ $883.35 · 2024-09-30
DECKER SUSAN LYNNE
Director
$543,430
@ $876.50 · 2024-08-15
GALANTI RICHARD ALAN
Officer and Director
$868,962
@ $868.96 · 2024-08-15
JONES TERESA A
Officer
$3,330
@ $832.50 · 2024-07-25
HINES DANIEL M
Officer
$2.54M
@ $846.37 · 2024-07-15
DENMAN KENNETH D
Director
$298,036
@ $851.53 · 2024-07-15
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.
COST
FearGreed
😏Greed(67/100)

"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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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)
COST
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 (67)
View CMCSA Full AnalysisView COST Full Analysis
CMCSA vs COST: Which Is the Better Buy? | SafetyMargin.io