APH vs. WDC: Amphenol vs. Western Digital Stock Comparison

July 7, 2026

How do Amphenol (APH) and Western Digital (WDC) stack up? This page sets them side by side across company profile, performance and risk, profitability, growth, financial strength, dividends, and valuation, with selected fundamentals also measured against each stock's industry-group peers.

Company Profile

Amphenol (APH) and Western Digital (WDC) both fall under the Technology Hardware & Equipment industry group, but APH is classified in Electronic Equipment, Instruments & Components while WDC is classified in Technology Hardware, Storage & Peripherals.

Company profile comparison for Amphenol (APH) and Western Digital (WDC)
Profile Item	APH	WDC
Name	Amphenol Corporation	Western Digital Corporation
Country/Region	United States	United States
GICS Sector	Information Technology	Information Technology
GICS Industry Group	Technology Hardware & Equipment	Technology Hardware & Equipment
GICS Industry	Electronic Equipment, Instruments & Components	Technology Hardware, Storage & Peripherals
GICS Sub-Industry	Electronic Components	Technology Hardware, Storage & Peripherals
Market Capitalization	205.22 billion USD	199.04 billion USD
Currency	USD	USD
Exchange	NYSE	Nasdaq
Listing Date	November 8, 1991	October 31, 1978
Security Type	Common Stock	Common Stock

Price Performance

Cumulative Growth

APH

WDC

GSPC

Amphenol (APH) vs. Western Digital (WDC), with S&P 500 (GSPC) for reference: Growth of a $10,000 investment over the past five years. Adjusted for dividends and splits.

Trailing Returns

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Trailing total returns for Amphenol (APH) and Western Digital (WDC). Returns over one year are annualized.

Calendar-Year Returns

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Calendar-year total returns for Amphenol (APH) and Western Digital (WDC). Each bar is that year's total return, measured year-end to year-end.

Performance Metrics

Price performance metrics for Amphenol (APH) and Western Digital (WDC)
Metric	APH	WDC
Total Return (1Y)	68.86%	776.25%
Total Return (3Y, Annualized)	59.84%	173.88%
Total Return (5Y, Annualized)	38.17%	61.83%

Risk Profile

Drawdown History

APH

WDC

GSPC

Amphenol (APH) vs. Western Digital (WDC), with S&P 500 (GSPC) for reference: Drawdown from the running peak over the past five years. Each line shows the decline from its prior peak; 0% marks a new high.

Return Distribution

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Distribution of monthly total returns for Amphenol (APH) and Western Digital (WDC). Each bar is the share of months whose return fell in that 5% bucket.

Risk Metrics

Western Digital (WDC) carries a highly aggressive beta of 2.14, indicating much higher sensitivity to broad-market moves, whereas Amphenol (APH) is closer to market-like at 1.24 — a noticeable difference in market-sensitivity profile.

Risk profile metrics for Amphenol (APH) and Western Digital (WDC)
Metric	APH	WDC
Volatility (1Y, Annualized)	42.88%	72.33%
Beta (5Y)	1.24	2.14
Max Drawdown (5Y)	-28.73%	-57.38%
Avg. Volume (3M)	9.82M	8.36M

Risk-Adjusted Performance

Risk-Return Positioning

APH and WDC are plotted by 1-year volatility (risk) and 1-year return. The dashed Capital Allocation Line runs from the risk-free rate through the shared industry median.

Risk-Adjusted Metrics

Risk-adjusted metrics for Amphenol (APH) and Western Digital (WDC)
Metric	APH	WDC
Sharpe Ratio (1Y)	1.51	10.68
Sortino Ratio (1Y)	2.16	18.31

Profitability

ROE (TTM)

Both companies show strong equity returns, but Western Digital (WDC) at 85.92% is the standout with ROE above its industry range; Amphenol (APH) at 36.83% also sits in the top quartile.

APH

Technology Hardware & Equipment industry group

36.83%

Max: 44.16%
APH: 36.83%
Q3: 19.42%
Median: 10.99%
Q1: 1.30%
Min: -25.17%

WDC

Technology Hardware & Equipment industry group

85.92%

WDC: 85.92%
Max: 44.16%
Q3: 19.42%
Median: 10.99%
Q1: 1.30%
Min: -25.17%

Amphenol (APH) vs. Western Digital (WDC): A comparison of their ROE against the Technology Hardware & Equipment industry group benchmark.

Net Margin (TTM)

Western Digital (WDC) at 55.29% keeps the most of each sales dollar — above its industry’s net margin range — and Amphenol (APH) at 17.24% also retains a top-quartile share.

APH

Technology Hardware & Equipment industry group

17.24%

Max: 30.43%
APH: 17.24%
Q3: 12.35%
Median: 4.70%
Q1: 0.00%
Min: -14.09%

WDC

Technology Hardware & Equipment industry group

55.29%

WDC: 55.29%
Max: 30.43%
Q3: 12.35%
Median: 4.70%
Q1: 0.00%
Min: -14.09%

Amphenol (APH) vs. Western Digital (WDC): A comparison of their net margin against the Technology Hardware & Equipment industry group benchmark.

Operating Margin (TTM)

Western Digital (WDC) at 37.01% shows unusually strong operating efficiency — above its industry’s operating margin range — and Amphenol (APH) at 27.31% also operates in the top quartile.

APH

Technology Hardware & Equipment industry group

27.31%

Max: 32.28%
APH: 27.31%
Q3: 15.55%
Median: 6.62%
Q1: 2.19%
Min: -11.92%

WDC

Technology Hardware & Equipment industry group

37.01%

WDC: 37.01%
Max: 32.28%
Q3: 15.55%
Median: 6.62%
Q1: 2.19%
Min: -11.92%

Amphenol (APH) vs. Western Digital (WDC): A comparison of their operating margin against the Technology Hardware & Equipment industry group benchmark.

Profitability Metrics

Profitability metrics for Amphenol (APH) and Western Digital (WDC)
Metric	APH	WDC
ROE (TTM)	36.83%	85.92%
ROA (TTM)	13.45%	14.65%
Net Margin (TTM)	17.24%	55.29%
Operating Margin (TTM)	27.31%	37.01%
Gross Margin (TTM)	37.92%	45.43%

Growth

Revenue Growth

Amphenol (APH) vs. Western Digital (WDC): A comparison of their Revenue Growth across different time periods.

Revenue Growth Metrics

Revenue growth metrics for Amphenol (APH) and Western Digital (WDC)
Metric	APH	WDC
Revenue Growth (YoY)	51.71%	50.70%
Revenue Growth (3Y CAGR)	22.31%	-20.28%

EPS Growth

Amphenol (APH) vs. Western Digital (WDC): A comparison of their EPS Growth across different time periods.

EPS Growth Metrics

EPS growth metrics for Amphenol (APH) and Western Digital (WDC)
Metric	APH	WDC
EPS Growth (YoY)	73.96%	--
EPS Growth (3Y CAGR)	29.72%	2.66%

Financial Strength

Current Ratio (MRQ)

Both Amphenol (APH) at 1.71 and Western Digital (WDC) at 1.49 carry current ratio within their industries’ typical mid-ranges, suggesting balanced short-term liquidity relative to peers.

APH

Technology Hardware & Equipment industry group

1.71

Max: 5.80
Q3: 3.18
Median: 1.90
APH: 1.71
Q1: 1.28
Min: 0.37

WDC

Technology Hardware & Equipment industry group

1.49

Max: 5.80
Q3: 3.18
Median: 1.90
WDC: 1.49
Q1: 1.28
Min: 0.37

Amphenol (APH) vs. Western Digital (WDC): A comparison of their current ratio against the Technology Hardware & Equipment industry group benchmark.

Debt / Equity (MRQ)

Western Digital (WDC) at 0.18 carries an industry-typical debt-to-equity mix, while Amphenol (APH) at 1.33 uses more debt funding than most peers.

APH

Technology Hardware & Equipment industry group

1.33

Max: 2.02
APH: 1.33
Q3: 0.88
Median: 0.31
Q1: 0.06
Min: 0.00

WDC

Technology Hardware & Equipment industry group

0.18

Max: 2.02
Q3: 0.88
Median: 0.31
WDC: 0.18
Q1: 0.06
Min: 0.00

Amphenol (APH) vs. Western Digital (WDC): A comparison of their debt-to-equity ratio against the Technology Hardware & Equipment industry group benchmark.

Financial Strength Metrics

Financial strength metrics for Amphenol (APH) and Western Digital (WDC)
Metric	APH	WDC
Current Ratio (MRQ)	1.71	1.49
Debt / Equity (MRQ)	1.33	0.18
Net Debt / EBITDA	1.73	-0.39

Dividends

Dividend Yield (TTM)

Amphenol (APH) at 0.50% delivers top-quartile income for its industry, while Western Digital (WDC) at 0.08% pays a more typical yield — both are credible income propositions, APH the richer one.

APH

Technology Hardware & Equipment industry group

0.50%

Max: 0.87%
APH: 0.50%
Q3: 0.35%
Median: 0.00%
Q1: 0.00%
Min: 0.00%

WDC

Technology Hardware & Equipment industry group

0.08%

Max: 0.87%
Q3: 0.35%
WDC: 0.08%
Median: 0.00%
Q1: 0.00%
Min: 0.00%

Amphenol (APH) vs. Western Digital (WDC): A comparison of their dividend yield against the Technology Hardware & Equipment industry group benchmark.

Dividend Payout Ratio (TTM)

Western Digital (WDC) at 2.69% pays out a band-typical share of earnings, while Amphenol (APH) at 23.85% distributes more than its industry norm — less retained, thinner cover.

APH

Technology Hardware & Equipment industry group

23.85%

Max: 36.36%
APH: 23.85%
Q3: 14.56%
Median: 0.00%
Q1: 0.00%
Min: 0.00%

WDC

Technology Hardware & Equipment industry group

2.69%

Max: 36.36%
Q3: 14.56%
WDC: 2.69%
Median: 0.00%
Q1: 0.00%
Min: 0.00%

Amphenol (APH) vs. Western Digital (WDC): A comparison of their payout ratio against the Technology Hardware & Equipment industry group benchmark.

Dividend Metrics

Dividend metrics for Amphenol (APH) and Western Digital (WDC)
Metric	APH	WDC
Dividend Yield (TTM)	0.50%	0.08%
Dividend Payout Ratio (TTM)	23.85%	2.69%

Valuation

P/E Ratio (TTM)

Both Amphenol (APH) at 48.07 and Western Digital (WDC) at 34.56 land around their industries’ usual P/E ratio levels — neither is getting a clear earnings-multiple discount or premium versus peers.

APH

Technology Hardware & Equipment industry group

48.07

Max: 159.86
Q3: 80.52
APH: 48.07
Median: 38.02
Q1: 23.45
Min: 8.37

WDC

Technology Hardware & Equipment industry group

34.56

Max: 159.86
Q3: 80.52
Median: 38.02
WDC: 34.56
Q1: 23.45
Min: 8.37

Amphenol (APH) vs. Western Digital (WDC): A comparison of their P/E ratio against the Technology Hardware & Equipment industry group benchmark.

P/S Ratio (TTM)

Both Amphenol (APH) at 7.92 and Western Digital (WDC) at 16.90 command a richer price per dollar of sales than most peers, sitting in the upper P/S ratio quartile of their industries.

APH

Technology Hardware & Equipment industry group

7.92

Max: 16.90
APH: 7.92
Q3: 7.86
Median: 3.64
Q1: 1.41
Min: 0.00

WDC

Technology Hardware & Equipment industry group

16.90

WDC: 16.90
Max: 16.90
Q3: 7.86
Median: 3.64
Q1: 1.41
Min: 0.00

Amphenol (APH) vs. Western Digital (WDC): A comparison of their P/S ratio against the Technology Hardware & Equipment industry group benchmark.

P/B Ratio (MRQ)

Both look rich against book: Amphenol (APH) at 14.67 sits in the upper P/B ratio quartile, and Western Digital (WDC) at 27.61 prices even higher, above its industry range.

APH

Technology Hardware & Equipment industry group

14.67

Max: 17.76
APH: 14.67
Q3: 8.60
Median: 4.14
Q1: 2.10
Min: -3.40

WDC

Technology Hardware & Equipment industry group

27.61

WDC: 27.61
Max: 17.76
Q3: 8.60
Median: 4.14
Q1: 2.10
Min: -3.40

Amphenol (APH) vs. Western Digital (WDC): A comparison of their P/B ratio against the Technology Hardware & Equipment industry group benchmark.

Valuation Metrics

Valuation metrics for Amphenol (APH) and Western Digital (WDC)
Metric	APH	WDC
P/E Ratio (TTM)	48.07	34.56
P/S Ratio (TTM)	7.92	16.90
P/B Ratio (MRQ)	14.67	27.61
Free Cash Flow Yield (TTM)	1.74%	1.04%