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Compare Stocks › BRK-B vs CSGP

Berkshire Hathaway Inc. (BRK-B) vs CoStar Group, Inc. (CSGP)

BRK-B
Berkshire Hathaway Inc.
$481.48
VS
CSGP
CoStar Group, Inc.
$42.82

Rewards

BRK-B
  • ★Each dollar of retained earnings has created $1.66 of market value — management is creating shareholder value.
  • ★Net debt/EBITDA of -2.2x means the company holds more cash than debt — a net cash position.
CSGP
  • ★Gross margin of 78.9% indicates strong pricing power — typical of businesses with significant intellectual property or brand strength.
  • ★4 insider purchases totaling $3.5M with no sells in the past 3 months — insiders are putting their own money in.
  • ★Altman Z-Score of 8.53 indicates very low bankruptcy risk — the company is firmly in the safe zone.

Risks

BRK-B
  • ⚠Berkshire Hathaway Inc. scores only 16/100 on the Economic Moat Score, suggesting limited durable competitive advantages.
  • ⚠Trailing P/E of 15.5x is 75% above the historical average of 8.9x — the stock trades at a premium to its own history.
CSGP
  • ⚠ROIC has declined by 5.1 percentage points over the observed period, which may signal competitive erosion.
  • ⚠FCF yield of 0.8% is below 3%, meaning the market is pricing in substantial future growth to justify the current price.
  • ⚠Trailing P/E of 2141.0x is 128% above the historical average of 937.7x — the stock trades at a premium to its own history.

Key Valuation Metrics

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BRK-B
CSGP
Valuation
$36.80B
Free Cash Flow
$143.75M
3.54%
FCF Yield
0.79%
15.50
Trailing P/E
2141.00
22.11
Forward P/E
24.11
Quality & Moat
11.31%
ROIC
1.48%
9.30%
ROE
0.08%
26.15%
Gross Margin
78.87%
N/A
PEG Ratio
N/A
Balance Sheet Safety
0.19
Debt / Equity
0.14
N/A
Interest Coverage
N/A
-2.15
Net Debt / EBITDA
-2.34
N/A
Dividend Yield
N/A
BRK-B: 6Ties: 1CSGP: 3
BRK-BCSGP

Historical Fundamentals

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BRK-B

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

CSGP

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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BRK-B
$1.66
created per $1 retained over 3 years
Value Creator
Σ Retained
$252.19B
Δ Market Cap
+$417.98B
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
CSGP
$-6.39
created per $1 retained over 3 years
Market Cap Declined
Σ Retained
$521.0M
Δ Market Cap
$-3.33B
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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BRK-B
31.1% Margin of Safety
Price is 31.1% below estimated fair value
Current Price: $481.48
Fair Value: $699.14
Strongly undervalued
Undervalued
Fairly valued
Overvalued
Strongly overvalued
CSGP
1718.6% Overvalued
Price is 1718.6% above estimated fair value
Current Price: $42.82
Fair Value: $2.35
Strongly undervalued
Undervalued
Fairly valued
Overvalued
Strongly overvalued

Reverse DCF — Market-Implied Growth

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BRK-B

What growth rate is the market pricing in at $481?

+0.7%
Market-Implied Owner Earnings Growth
Standard FCF implies +8.8%

The market implies +0.7% Owner Earnings growth, above historical trends.

Standard FCF implies a demanding +8.8%, reflecting heavy growth investment.

CSGP

What growth rate is the market pricing in at $43?

+60.0%
Market-Implied Owner Earnings Growth
Standard FCF implies +32.8%

The market implies +60.0% Owner Earnings growth, above historical trends.

Standard FCF implies a demanding +32.8%, reflecting heavy growth investment.

Economic Moat Score

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BRK-B
16/100
No Moat
70+ Wide · 40-69 Narrow · <40 None

No durable moat detected, though reinvestment efficiency shows some competitive positioning. The business lacks consistent evidence of sustainable advantages.

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.
CSGP
37/100
No Moat
70+ Wide · 40-69 Narrow · <40 None

No durable moat detected, though revenue predictability shows some competitive positioning. The business lacks consistent evidence of sustainable advantages.

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.

Forensic Accounting

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BRK-B
-2.41
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.
CSGP
-2.07
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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BRK-B
Insiders 0.3%Institutions 66.2%Retail & Other 33.5%
No. of Institutional Holders5,852
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.
CSGP
Insiders 1.2%Institutions 104.8%
No. of Institutional Holders1,218
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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BRK-B
0
Buys (3M)
0
Buys (12M)
No open market insider purchases found.
Open market purchases · includes direct & indirect ownership · excludes option exercises
CSGP
4
Buys (3M)
4
Buys (12M)
Total value (12M): $3.48M
SAMS LOUISE S.
Director
$48,360
@ $48.36 · 2026-03-06
GLASER RACHEL C
Director
$44,940
@ $44.94 · 2026-03-02
SAINT FREDERICK G
Officer
$906,600
@ $45.33 · 2026-03-02
FLORANCE ANDREW COLDEN
Chief Executive Officer
$2.48M
@ $44.52 · 2026-02-27
FLORANCE ANDREW COLDEN
Chief Executive Officer
$1.10M
@ $74.67 · 2024-10-25
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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BRK-B
0
Sells (3M)
0
Sells (12M)
No open market insider sales found.
Direct ownership only · excludes indirect, option exercises, planned (10b5-1) sales & derivatives
CSGP
0
Sells (3M)
6
Sells (12M)
Total value (12M): $7.09M
HILL JOHN W
Director
$154,530
@ $68.68 · 2025-11-13
CANN CYNTHIA CAMMETT
Officer
$126,642
@ $68.79 · 2025-11-13
SAINT FREDERICK G
Officer
$2.26M
@ $90.33 · 2025-08-28
CANN CYNTHIA CAMMETT
Officer
$188,764
@ $92.85 · 2025-07-28
SAINT FREDERICK G
Officer
$2.33M
@ $93.23 · 2025-07-28
SAINT FREDERICK G
Officer
$2.03M
@ $81.10 · 2025-06-11
CANN CYNTHIA CAMMETT
Officer
$334,259
@ $78.48 · 2025-03-10
HILL JOHN W
Director
$209,939
@ $76.76 · 2024-12-10
NASSETTA CHRISTOPHER J
Director
$135,136
@ $80.39 · 2024-11-27
DESMARAIS MICHAEL J
Officer
$439,340
@ $79.88 · 2024-11-26
KLEIN MICHAEL R
Director
$5.35M
@ $74.69 · 2024-10-25
HILL JOHN W
Director
$103,562
@ $78.16 · 2024-07-30
SAINT FREDERICK G
Officer
$221,075
@ $88.43 · 2024-05-16
RUGGLES LISA C.
Officer
$1.82M
@ $91.15 · 2024-05-09
WHEELER SCOTT T
Chief Financial Officer
$11.37M
@ $92.61 · 2024-04-26
DESMARAIS MICHAEL J
Officer
$352,146
@ $92.67 · 2024-04-26
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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BRK-B
FearGreed
😐Neutral(48/100)

"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.
CSGP
FearGreed
😨Fear(27/100)

"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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BRK-B
⚪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 (48)
CSGP
⚪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 (27)
View BRK-B Full AnalysisView CSGP Full Analysis