Compare StocksMRK vs UNP

Merck & Co., Inc. (MRK) vs Union Pacific Corporation (UNP)

MRK
Merck & Co., Inc.
$112.16
VS
UNP
Union Pacific Corporation
$266.32

Rewards

MRK
  • Gross margin of 76.6% indicates strong pricing power — typical of businesses with significant intellectual property or brand strength.
  • Each dollar of retained earnings has created $3.38 of earning power — management is an exceptional capital allocator.
  • Dividend yield of 3.03% with a consistent or growing payout over the past 4 years.
UNP
  • Union Pacific Corporation has maintained ROIC above 10% for 4 consecutive years, suggesting solid business economics.
  • Union Pacific Corporation scores 80/100 on the Economic Moat Score (Wide Moat), with margin stability as the strongest competitive dimension.
  • Return on equity has consistently exceeded 20% over 4 years, indicating efficient use of shareholder capital.

Risks

MRK
  • PEG ratio of 3.43 indicates the stock is expensive relative to its expected growth — the market may be pricing in more growth than analysts project.
  • 12 insider sales totaling $40.7M with no purchases in the past 3 months — insiders are reducing their exposure.
  • Free cash flow has declined at a 5.6% CAGR over the past 4 years — a concerning trend.
UNP
  • Each dollar of retained earnings has produced only $0.15 of earning power — shareholders may have been better served by dividends.
  • PEG ratio of 3.54 indicates the stock is expensive relative to its expected growth — the market may be pricing in more growth than analysts project.
  • Insiders have sold $8.5M worth of stock in the past 3 months — significant insider liquidation.

Key Valuation Metrics

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MRK
UNP
Valuation
N/A
Free Cash Flow
$5.50B
N/A
FCF Yield
3.48%
31.51
Trailing P/E
21.94
11.52
Forward P/E
19.46
Quality & Moat
19.18%
ROIC
15.46%
34.66%
ROE
36.76%
76.60%
Gross Margin
56.53%
3.43
PEG Ratio
3.54
Balance Sheet Safety
0.96
Debt / Equity
1.62
N/A
Interest Coverage
N/A
1.23
Net Debt / EBITDA
2.42
3.03%
Dividend Yield
2.07%
MRK: 6Ties: 2UNP: 2
MRKUNP

Historical Fundamentals

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MRK

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

UNP

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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MRK
$-1.72
created per $1 retained over 3 years
Market Cap Declined
Σ Retained
$12.28B
Δ Market Cap
$-21.09B
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
UNP
$0.98
created per $1 retained over 3 years
Mediocre Allocator
Σ Retained
$10.64B
Δ Market Cap
+$10.42B
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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MRK
78.5% Margin of Safety
Price is 78.5% below estimated fair value
Current Price: $112.16
Fair Value: $522.77
Strongly undervalued
Undervalued
Fairly valued
Overvalued
Strongly overvalued
UNP
17.9% Overvalued
Price is 17.9% above estimated fair value
Current Price: $266.32
Fair Value: $225.93
Strongly undervalued
Undervalued
Fairly valued
Overvalued
Strongly overvalued

Reverse DCF — Market-Implied Growth

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MRK

Requires positive FCF to compute implied growth rate.

UNP

What growth rate is the market pricing in at $266?

+11.5%
Market-Implied Owner Earnings Growth
Standard FCF implies +15.0%

The market implies +11.5% Owner Earnings growth, above historical trends.

Standard FCF implies a demanding +15.0%, reflecting heavy growth investment.

Economic Moat Score

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MRK
68/100
Narrow Moat
70+ Wide · 40-69 Narrow · <40 None

Narrow moat with revenue predictability as the key competitive advantage. Improving margin stability 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.
UNP
80/100
Wide Moat
70+ Wide · 40-69 Narrow · <40 None

Wide moat driven primarily by margin stability. Reinvestment Efficiency 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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MRK
-2.31
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.
UNP
-2.61
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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MRK
Insiders 0.1%Institutions 81.3%Retail & Other 18.6%
No. of Institutional Holders4,628
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.
UNP
Insiders 0.1%Institutions 89.0%Retail & Other 10.9%
No. of Institutional Holders3,420
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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MRK
0
Buys (3M)
0
Buys (12M)
THULIN INGE G
Director
$250,000
@ $88.28 · 2025-02-06
BAKER DOUGLAS M JR
Director
$1.33M
@ $88.50 · 2025-02-05
Open market purchases · includes direct & indirect ownership · excludes option exercises
UNP
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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MRK
12
Sells (3M)
14
Sells (12M)
Total value (12M): $42.04M
GUINDO CHIRFI
Officer
$1.21M
@ $121.46 · 2026-02-12
LI DEAN Y
Officer
$1.20M
@ $117.52 · 2026-02-10
GUINDO CHIRFI
Officer
$1.18M
@ $118.41 · 2026-02-09
ZACHARY JENNIFER L
General Counsel
$14.49M
@ $119.15 · 2026-02-09
DELUCA RICHARD ROBERT JR.
Officer
$4.56M
@ $120.92 · 2026-02-06
WILLIAMS DAVID MICHAEL
Chief Technology Officer
$609,525
@ $121.91 · 2026-02-06
OOSTHUIZEN JOHANNES JACOBUS
Officer
$1.83M
@ $121.87 · 2026-02-06
GUINDO CHIRFI
Officer
$2.44M
@ $121.88 · 2026-02-05
LI DEAN Y
Officer
$1.79M
@ $118.77 · 2026-02-04
DAVIS ROBERT M
Chief Executive Officer
$5.60M
@ $118.04 · 2026-02-04
LITCHFIELD CAROLINE
Chief Financial Officer
$5.02M
@ $119.61 · 2026-02-04
SMART DALTON E. III
Officer
$765,920
@ $119.67 · 2026-02-04
DOWNING CRISTAL N.
Officer
$616,395
@ $87.00 · 2025-11-10
WILLIAMS DAVID MICHAEL
Chief Technology Officer
$720,040
@ $83.59 · 2025-11-03
SMART DALTON E. III
Officer
$352,723
@ $82.76 · 2025-04-25
OOSTHUIZEN JOHANNES JACOBUS
Officer
$714,745
@ $84.09 · 2025-02-19
WILLIAMS DAVID MICHAEL
Chief Technology Officer
$512,057
@ $85.34 · 2025-02-13
DOWNING CRISTAL N.
Officer
$209,551
@ $88.76 · 2025-02-06
Direct ownership only · excludes indirect, option exercises, planned (10b5-1) sales & derivatives
UNP
3
Sells (3M)
3
Sells (12M)
Total value (12M): $8.46M
HAMANN JENNIFER L
Chief Financial Officer
$549,400
@ $274.70 · 2026-04-24
ROCKER KENYATTA G.
Officer
$7.44M
@ $271.76 · 2026-04-24
GEHRINGER ERIC J.
Officer
$469,625
@ $234.93 · 2026-03-20
RICHARDSON CRAIG V
Officer
$1.64M
@ $252.00 · 2025-01-27
WHITED ELIZABETH F.
President
$1.88M
@ $250.00 · 2025-01-24
WHITED ELIZABETH F.
President
$875,905
@ $246.59 · 2024-07-30
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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MRK
FearGreed
😐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.
UNP
FearGreed
😏Greed(65/100)

"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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MRK
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)
UNP
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 (65)
View MRK Full AnalysisView UNP Full Analysis
MRK vs UNP: Which Is the Better Buy? | SafetyMargin.io