Compare Stocks › AXP vs DXCM
American Express Company (AXP) vs DexCom, Inc. (DXCM)
AXP
American Express Company
$294.93
VS
DXCM
DexCom, Inc.
$67.27
Rewards
AXP
- ★Gross margin of 63.5% indicates strong pricing power — typical of businesses with significant intellectual property or brand strength.
- ★Return on equity has consistently exceeded 20% over 4 years, indicating efficient use of shareholder capital.
- ★Each dollar of retained earnings has created $6.18 of market value — management is an exceptional capital allocator.
DXCM
- ★Gross margin of 60.1% indicates strong pricing power — typical of businesses with significant intellectual property or brand strength.
- ★Free cash flow has grown at a 52.3% CAGR over the past 4 years, demonstrating strong earnings power growth.
- ★Trailing P/E of 32.2x is 57% below the historical average of 75.4x — potentially undervalued relative to its own history.
Risks
AXP
- ⚠Altman Z-Score of 0.93 places the company in the distress zone — financial patterns resemble those of companies that experienced bankruptcy.
- ⚠7 insider sales totaling $36.4M with no purchases in the past 3 months — insiders are reducing their exposure.
- ⚠Free cash flow has declined at a 5.9% CAGR over the past 4 years — a concerning trend.
DXCM
Key Valuation Metrics
Learn more →AXP
DXCM
Valuation
N/A
Free Cash Flow
$1.08B
N/A
FCF Yield
4.11%
19.19
Trailing P/E
32.19
14.64
Forward P/E
22.51
Quality & Moat
9.49%
ROIC
22.80%
31.97%
ROE
30.46%
63.47%
Gross Margin
60.10%
1.16
PEG Ratio
0.41
Balance Sheet Safety
1.91
Debt / Equity
0.51
N/A
Interest Coverage
N/A
N/A
Net Debt / EBITDA
-0.52
1.29%
Dividend Yield
N/A
AXP: 3Ties: 2DXCM: 3
AXPDXCM
Historical Fundamentals
Learn more →AXP
Price ÷ Earnings Per Share — how many years of current earnings you're paying for at today's price. Lower P/E may indicate undervaluation.
DXCM
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 →AXP
$6.18
created per $1 retained over 3 years
Exceptional Value Creator
Σ Retained
$23.29B
Δ Market Cap
+$144.01B
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
DXCM
$-9.32
created per $1 retained over 3 years
Market Cap Declined
Σ Retained
$1.95B
Δ Market Cap
$-18.21B
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 →AXP
38.6% Margin of Safety
Price is 38.6% below estimated fair value
Current Price: $294.93
Strongly undervalued
Undervalued
Fairly valued
Overvalued
Strongly overvalued
Fair Value: $480.21
Strongly undervalued
Undervalued
Fairly valued
Overvalued
Strongly overvalued
DXCM
27.9% Margin of Safety
Price is 27.9% below estimated fair value
Current Price: $67.27
Strongly undervalued
Undervalued
Fairly valued
Overvalued
Strongly overvalued
Fair Value: $93.28
Strongly undervalued
Undervalued
Fairly valued
Overvalued
Strongly overvalued
Reverse DCF — Market-Implied Growth
Learn more →AXP
Requires positive FCF to compute implied growth rate.
DXCM
What growth rate is the market pricing in at $67?
+13.5%
Market-Implied Owner Earnings Growth
Standard FCF implies +10.1%
The market implies +13.5% Owner Earnings growth, below historical trends — potential opportunity.
Standard FCF implies a more demanding +10.1%, reflecting heavy growth investment expected to generate future returns.
Economic Moat Score
Learn more →AXP
40/100
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.
DXCM
65/100
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.
Forensic Accounting
Learn more →AXP
-2.51
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.
DXCM
-2.62
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 →AXP
Insiders 22.2%Institutions 64.8%Retail & Other 12.9%
No. of Institutional Holders3,749
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.
DXCM
Insiders 0.4%Institutions 101.0%
No. of Institutional Holders1,386
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 →AXP
0
Buys (3M)
1
Buys (12M)
Total value (12M): $4,054
JOABAR RAYMOND D
Officer
$4,054
@ $176.26 · 2025-04-09
ANGELAKIS MICHAEL J
Director
$998,593
@ $269.89 · 2025-03-07
Open market purchases · includes direct & indirect ownership · excludes option exercises
DXCM
0
Buys (3M)
1
Buys (12M)
Total value (12M): $1.00M
LEACH JACOB STEVEN
President
$1.00M
@ $55.04 · 2025-11-10
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 →AXP
7
Sells (3M)
20
Sells (12M)
Total value (12M): $152.65M
LIEBERMAN QUINN JESSICA
Officer
$909,661
@ $300.02 · 2026-03-06
JOABAR RAYMOND D
Officer
$4.77M
@ $340.67 · 2026-02-19
GROSFIELD HOWARD M
Officer
$2.82M
@ $346.73 · 2026-02-12
RADHAKRISHNAN RAVIKUMAR S
Chief Technology Officer
$5.35M
@ $356.58 · 2026-02-09
SEEGER LAUREEN E
Officer
$4.60M
@ $360.99 · 2026-02-09
MARRS ANNA
Officer
$9.60M
@ $350.01 · 2026-02-05
PICKETT DENISE
Officer
$8.35M
@ $356.91 · 2026-02-05
JOABAR RAYMOND D
Officer
$538,902
@ $384.93 · 2025-12-12
RUTLEDGE ELIZABETH
Officer
$18.01M
@ $360.21 · 2025-10-31
TABISH DOUGLAS J
Officer
$894,359
@ $355.61 · 2025-10-23
PICKETT DENISE
Officer
$1.75M
@ $350.73 · 2025-10-22
SQUERI STEPHEN J
Chief Executive Officer
$37.03M
@ $329.86 · 2025-09-04
HERENA MONIQUE
Officer
$2.83M
@ $325.88 · 2025-09-03
BUCKMINSTER DOUGLAS E
Officer
$7.67M
@ $326.37 · 2025-09-02
SEEGER LAUREEN E
Officer
$23.37M
@ $296.90 · 2025-08-06
MCNEAL GLENDA G
Officer
$15.47M
@ $309.50 · 2025-07-29
MARRS ANNA
Officer
$1.71M
@ $310.77 · 2025-07-29
MARQUEZ RAFAEL
Officer
$3.56M
@ $296.93 · 2025-05-20
GROSFIELD HOWARD M
Officer
$2.60M
@ $275.50 · 2025-05-06
MCNEAL GLENDA G
Officer
$799,009
@ $264.66 · 2025-04-29
MARRS ANNA
President
$6.32M
@ $287.88 · 2025-03-04
LIEBERMAN QUINN JESSICA
Officer
$897,590
@ $296.43 · 2025-02-26
MCNEAL GLENDA G
Officer
$2.29M
@ $309.96 · 2025-02-11
SQUERI STEPHEN J
Chief Executive Officer
$16.24M
@ $319.45 · 2025-02-06
JOABAR RAYMOND D
Officer
$3.53M
@ $317.01 · 2025-02-05
RADHAKRISHNAN RAVIKUMAR S
Chief Technology Officer
$3.03M
@ $319.17 · 2025-02-05
PICKETT DENISE
Officer
$7.25M
@ $318.69 · 2025-02-05
JOABAR RAYMOND D
Officer
$4.77M
@ $313.94 · 2025-01-28
LE CAILLEC CHRISTOPHE
Chief Financial Officer
$1.82M
@ $303.48 · 2024-11-27
SQUERI STEPHEN J
Chief Executive Officer
$48.90M
@ $286.57 · 2024-11-07
HERENA MONIQUE
Officer
$374,010
@ $287.70 · 2024-11-07
BUCKMINSTER DOUGLAS E
Officer
$3.55M
@ $270.98 · 2024-10-29
WILLIAMS ANRE D.
Officer
$21.05M
@ $270.26 · 2024-10-22
PICKETT DENISE
Officer
$666,213
@ $240.68 · 2024-05-22
SKYLER JENNIFER
Officer
$3.58M
@ $241.73 · 2024-05-10
LIEBERMAN QUINN JESSICA
Officer
$729,770
@ $232.41 · 2024-05-06
MARRS ANNA
Officer
$829,501
@ $230.93 · 2024-05-03
BUCKMINSTER DOUGLAS E
Officer
$27.27M
@ $232.44 · 2024-05-02
SQUERI STEPHEN J
Chief Executive Officer
$9.28M
@ $238.63 · 2024-04-23
Direct ownership only · excludes indirect, option exercises, planned (10b5-1) sales & derivatives
DXCM
1
Sells (3M)
12
Sells (12M)
Total value (12M): $2.41M
HELLER BRIDGETTE P
Director
$68,826
@ $68.01 · 2026-02-12
HELLER BRIDGETTE P
Director
$58,767
@ $58.07 · 2025-11-12
MALADY KYLE
Director
$53,934
@ $80.86 · 2025-09-05
STERN SADIE
Officer
$117,280
@ $80.00 · 2025-09-04
SYLVAIN JEREME M
Chief Financial Officer
$357,796
@ $74.17 · 2025-09-02
BROWN MICHAEL JON
Officer
$40,145
@ $80.29 · 2025-08-15
STERN SADIE
Officer
$130,459
@ $88.99 · 2025-07-28
BROWN MICHAEL JON
Officer
$43,015
@ $86.03 · 2025-07-15
STERN SADIE
Officer
$124,698
@ $85.06 · 2025-06-26
BROWN MICHAEL JON
Officer
$41,400
@ $82.80 · 2025-06-16
STERN SADIE
Officer
$526,318
@ $85.11 · 2025-05-27
BROWN MICHAEL JON
Officer
$842,849
@ $84.28 · 2025-05-23
HELLER BRIDGETTE P
Director
$24,756
@ $70.33 · 2025-03-17
SYLVAIN JEREME M
Chief Financial Officer
$844,632
@ $70.38 · 2025-03-12
STERN SADIE
Officer
$786,568
@ $70.38 · 2025-03-12
LEACH JACOB STEVEN
Chief Operating Officer
$990,670
@ $70.38 · 2025-03-12
SAYER KEVIN R
Chief Executive Officer
$2.29M
@ $70.38 · 2025-03-12
BROWN MICHAEL JON
Officer
$914,941
@ $70.38 · 2025-03-12
SYLVAIN JEREME M
Chief Financial Officer
$516,830
@ $73.83 · 2025-03-10
SYLVAIN JEREME M
Chief Financial Officer
$181,650
@ $86.91 · 2025-01-29
STERN SADIE
Officer
$181,911
@ $86.91 · 2025-01-29
LEACH JACOB STEVEN
Chief Operating Officer
$228,932
@ $86.91 · 2025-01-29
DOLAN MATTHEW VINCENT
Officer
$102,820
@ $86.91 · 2025-01-29
SAYER KEVIN R
Chief Executive Officer
$2.90M
@ $86.91 · 2025-01-29
STERN SADIE
Officer
$32,593
@ $76.87 · 2024-12-16
SYLVAIN JEREME M
Chief Financial Officer
$57,191
@ $76.87 · 2024-12-16
LEACH JACOB STEVEN
Chief Operating Officer
$57,191
@ $76.87 · 2024-12-16
HELLER BRIDGETTE P
Director
$76,870
@ $76.87 · 2024-12-16
STERN SADIE
Officer
$318,275
@ $74.73 · 2024-11-20
SYLVAIN JEREME M
Chief Financial Officer
$264,285
@ $75.51 · 2024-11-15
HELLER BRIDGETTE P
Director
$70,000
@ $70.00 · 2024-09-16
STERN SADIE
Officer
$29,458
@ $69.15 · 2024-09-09
SYLVAIN JEREME M
Chief Financial Officer
$51,586
@ $69.15 · 2024-09-09
LEACH JACOB STEVEN
Chief Operating Officer
$51,586
@ $69.15 · 2024-09-09
BROWN MICHAEL JON
Officer
$48,020
@ $70.00 · 2024-08-30
BROWN MICHAEL JON
Officer
$45,347
@ $69.55 · 2024-07-31
BROWN MICHAEL JON
Officer
$75,317
@ $114.29 · 2024-06-28
HELLER BRIDGETTE P
Director
$113,550
@ $113.55 · 2024-06-14
STERN SADIE
Officer
$49,127
@ $115.05 · 2024-06-10
SYLVAIN JEREME M
Chief Financial Officer
$85,713
@ $115.05 · 2024-06-10
LEACH JACOB STEVEN
Chief Operating Officer
$85,713
@ $115.05 · 2024-06-10
BROWN MICHAEL JON
Officer
$77,744
@ $119.24 · 2024-05-31
DOLAN MATTHEW VINCENT
Officer
$306,703
@ $126.58 · 2024-05-15
BROWN MICHAEL JON
Officer
$79,411
@ $126.25 · 2024-04-30
DOLAN MATTHEW VINCENT
Officer
$274,242
@ $137.81 · 2024-04-15
SAYER KEVIN R
Chief Executive Officer
$6.86M
@ $138.30 · 2024-04-08
BROWN MICHAEL JON
Officer
$367,472
@ $140.04 · 2024-03-28
STERN SADIE
Officer
$579,180
@ $140.00 · 2024-03-25
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 →AXP
😐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.
DXCM
😨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
Learn more →AXP
⚪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)
DXCM
⚪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)