Compare Stocks › BRK-B vs IRM
Berkshire Hathaway Inc. (BRK-B) vs Iron Mountain Incorporated (IRM)
BRK-B
Berkshire Hathaway Inc.
$481.48
VS
IRM
Iron Mountain Incorporated
$104.94
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.
IRM
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.
IRM
- ⚠Trailing P/E of 214.2x is 79% above the historical average of 119.7x — the stock trades at a premium to its own history.
- ⚠Net debt/EBITDA of 8.1x indicates heavy leverage — it would take over 4 years of EBITDA to pay off net debt.
- ⚠Altman Z-Score of 0.83 places the company in the distress zone — financial patterns resemble those of companies that experienced bankruptcy.
Key Valuation Metrics
Learn more →BRK-B
IRM
Valuation
$36.80B
Free Cash Flow
$-1.17B
3.54%
FCF Yield
-3.76%
15.50
Trailing P/E
214.16
22.11
Forward P/E
40.97
Quality & Moat
11.31%
ROIC
6.26%
9.30%
ROE
N/A
26.15%
Gross Margin
55.38%
N/A
PEG Ratio
N/A
Balance Sheet Safety
0.19
Debt / Equity
N/A
N/A
Interest Coverage
N/A
-2.15
Net Debt / EBITDA
8.14
N/A
Dividend Yield
3.29%
BRK-B: 6Ties: 1IRM: 1
BRK-BIRM
Historical Fundamentals
Learn more →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.
IRM
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
Learn more →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
> $1 created per $1 retained = Value Creator · < $1 created = Value Destroyer
IRM
N/A
Net losses over 3 years — test not applicable
Company had negative cumulative retained earnings
Σ Retained
$-1.94B
Δ Market Cap
+$10.04B
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
> $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
Learn more →BRK-B
31.1% Margin of Safety
Price is 31.1% below estimated fair value
Current Price: $481.48
Strongly undervalued
Undervalued
Fairly valued
Overvalued
Strongly overvalued
Fair Value: $699.14
Strongly undervalued
Undervalued
Fairly valued
Overvalued
Strongly overvalued
IRM
Insufficient Data
Enter initial FCF to calculate intrinsic value
Current Price: $104.94
Strongly undervalued
Strongly overvalued
Fair Value: $0.00
Strongly undervalued
Undervalued
Fairly valued
Overvalued
Strongly overvalued
Reverse DCF — Market-Implied Growth
Learn more →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.
IRM
Requires positive FCF to compute implied growth rate.
Economic Moat Score
Learn more →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.
IRM
53/100
Narrow Moat
70+ Wide · 40-69 Narrow · <40 None
Narrow moat with revenue predictability 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
Learn more →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.
IRM
-2.66
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
Learn more →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.
IRM
Insiders 0.9%Institutions 88.8%Retail & Other 10.4%
No. of Institutional Holders1,379
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
Learn more →BRK-B
0
Buys (3M)
0
Buys (12M)
No open market insider purchases found.
Open market purchases · includes direct & indirect ownership · excludes option exercises
IRM
0
Buys (3M)
1
Buys (12M)
Total value (12M): $2,954
KELLY CHRISTIE BARTON
Director
$2,954
@ $89.52 · 2025-11-19
Open market purchases · includes direct & indirect ownership · excludes option exercises
Open market purchases · includes direct & indirect ownership · excludes option exercises.
Insider Selling Activity
Learn more →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
IRM
9
Sells (3M)
30
Sells (12M)
Total value (12M): $125.79M
MEANEY WILLIAM L
Chief Executive Officer
$10.48M
@ $106.25 · 2026-03-05
MEANEY WILLIAM L
Chief Executive Officer
$21.13M
@ $107.10 · 2026-03-04
MEANEY WILLIAM L
Chief Executive Officer
$15.00M
@ $109.39 · 2026-03-02
ALLERTON JENNIFER
Director
$762,160
@ $108.88 · 2026-03-02
KIDD MARK
Officer
$643,620
@ $107.27 · 2026-03-02
MEANEY WILLIAM L
Chief Executive Officer
$4.16M
@ $108.17 · 2026-02-20
KIDD MARK
Officer
$649,020
@ $108.17 · 2026-02-20
MEANEY WILLIAM L
Chief Executive Officer
$3.20M
@ $83.17 · 2026-01-02
KIDD MARK
Officer
$498,600
@ $83.10 · 2026-01-02
MEANEY WILLIAM L
Chief Executive Officer
$5.76M
@ $83.34 · 2025-12-01
KIDD MARK
Officer
$510,000
@ $85.00 · 2025-12-01
MEANEY WILLIAM L
Chief Executive Officer
$7.10M
@ $102.75 · 2025-11-03
KIDD MARK
Officer
$615,060
@ $102.51 · 2025-11-03
KIDD MARK
Officer
$736,591
@ $100.82 · 2025-10-31
MEANEY WILLIAM L
Chief Executive Officer
$7.07M
@ $102.34 · 2025-10-01
KIDD MARK
Officer
$609,780
@ $101.63 · 2025-10-01
MEANEY WILLIAM L
Chief Executive Officer
$6.19M
@ $89.56 · 2025-09-03
KIDD MARK
Officer
$546,300
@ $91.05 · 2025-09-02
MEANEY WILLIAM L
Chief Executive Officer
$6.54M
@ $94.55 · 2025-08-01
KIDD MARK
Officer
$583,200
@ $97.20 · 2025-08-01
MCINTOSH GREG W
Officer
$1.69M
@ $97.20 · 2025-08-01
MEANEY WILLIAM L
Chief Executive Officer
$6.94M
@ $100.36 · 2025-07-01
KIDD MARK
Officer
$612,120
@ $102.02 · 2025-07-01
MCINTOSH GREG W
Officer
$1.73M
@ $100.00 · 2025-07-01
RAKOWICH WALTER C.
Director
$89,973
@ $99.97 · 2025-06-04
MEANEY WILLIAM L
Chief Executive Officer
$6.83M
@ $98.77 · 2025-06-02
MCINTOSH GREG W
Officer
$1.70M
@ $98.19 · 2025-06-02
MCINTOSH GREG W
Officer
$807,384
@ $96.14 · 2025-05-22
MEANEY WILLIAM L
Chief Executive Officer
$6.64M
@ $96.09 · 2025-05-02
MEANEY WILLIAM L
Chief Executive Officer
$5.95M
@ $86.11 · 2025-04-01
MEANEY WILLIAM L
Chief Executive Officer
$21.25M
@ $89.50 · 2025-03-04
MEANEY WILLIAM L
Chief Executive Officer
$21.25M
@ $89.50 · 2025-03-04
BHARGAVA MITHU
Officer
$161,356
@ $92.84 · 2025-03-03
MEANEY WILLIAM L
Chief Executive Officer
$15.76M
@ $91.33 · 2025-03-03
BORGES DANIEL
Officer
$597,240
@ $92.84 · 2025-03-03
MEANEY WILLIAM L
Chief Executive Officer
$6.90M
@ $99.83 · 2025-02-03
MEANEY WILLIAM L
Chief Executive Officer
$7.25M
@ $104.85 · 2025-01-02
BHARGAVA MITHU
Officer
$863,401
@ $104.49 · 2024-12-23
MEANEY WILLIAM L
Chief Executive Officer
$3.60M
@ $113.55 · 2024-12-11
MEANEY WILLIAM L
Chief Executive Officer
$3.76M
@ $118.47 · 2024-11-11
MEANEY WILLIAM L
Chief Executive Officer
$3.73M
@ $117.52 · 2024-10-08
MEANEY WILLIAM L
Chief Executive Officer
$3.70M
@ $116.43 · 2024-09-18
MURDOCK WENDY J
Director
$989,230
@ $116.38 · 2024-09-17
MARSON DEBORAH
General Counsel
$406,296
@ $112.86 · 2024-09-03
BAKER-GREENE EDWARD
Officer
$248,254
@ $109.75 · 2024-08-20
MEANEY WILLIAM L
Chief Executive Officer
$3.46M
@ $109.08 · 2024-08-20
TOMOVCSIK JOHN
Chief Operating Officer
$110,000
@ $110.00 · 2024-08-19
MARSON DEBORAH
General Counsel
$498,741
@ $107.58 · 2024-08-09
TOMOVCSIK JOHN
Chief Operating Officer
$300,930
@ $105.00 · 2024-08-01
TOMOVCSIK JOHN
Chief Operating Officer
$250,000
@ $100.00 · 2024-07-16
MEANEY WILLIAM L
Chief Executive Officer
$2.93M
@ $92.23 · 2024-07-09
BAKER-GREENE EDWARD
Officer
$547,770
@ $88.35 · 2024-06-20
TOMOVCSIK JOHN
Chief Operating Officer
$3.11M
@ $88.76 · 2024-06-20
HYTINEN BARRY A
Chief Financial Officer
$794,790
@ $88.31 · 2024-06-18
BORGES DANIEL
Officer
$268,739
@ $86.83 · 2024-06-17
MCINTOSH GREG W
Officer
$1.22M
@ $87.41 · 2024-06-13
RAKOWICH WALTER C.
Director
$77,589
@ $81.33 · 2024-06-05
MEANEY WILLIAM L
Chief Executive Officer
$2.56M
@ $80.71 · 2024-06-04
MEANEY WILLIAM L
Chief Executive Officer
$2.60M
@ $81.88 · 2024-05-16
MURDOCK WENDY J
Director
$275,247
@ $77.60 · 2024-05-07
MURDOCK WENDY J
Director
$113,026
@ $75.35 · 2024-05-03
MARSON DEBORAH
General Counsel
$155,600
@ $77.80 · 2024-05-03
MEANEY WILLIAM L
Chief Executive Officer
$1.19M
@ $74.69 · 2024-04-16
MEANEY WILLIAM L
Chief Executive Officer
$1.22M
@ $76.68 · 2024-04-15
MARSON DEBORAH
General Counsel
$156,960
@ $78.48 · 2024-04-05
KIDD MARK
Officer
$357,576
@ $80.21 · 2024-04-01
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
Learn more →BRK-B
😐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.
IRM
😐Neutral(55/100)
"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.
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
Learn more →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)
IRM
⚪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 (55)