APH vs. STX: Amphenol vs. Seagate Technology Stock Comparison

September 14, 2026

How do Amphenol (APH) and Seagate Technology (STX) 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 Seagate Technology (STX) both fall under the Technology Hardware & Equipment industry group, but APH is classified in Electronic Equipment, Instruments & Components while STX is classified in Technology Hardware, Storage & Peripherals.

Company profile comparison for Amphenol (APH) and Seagate Technology (STX)
Profile Item	APH	STX
Name	Amphenol Corporation	Seagate Technology Holdings plc
Country/Region	United States	Singapore
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	206.94 billion USD	192.48 billion USD
Currency	USD	USD
Exchange	NYSE	Nasdaq
Listing Date	November 8, 1991	December 11, 2002
Security Type	Common Stock	Common Stock

Price Performance

Cumulative Growth

APH

STX

GSPC

Amphenol (APH) vs. Seagate Technology (STX), 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 Seagate Technology (STX). Returns over one year are annualized.

Calendar-Year Returns

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Calendar-year total returns for Amphenol (APH) and Seagate Technology (STX). Each bar is that year's total return, measured year-end to year-end.

Performance Metrics

Price performance metrics for Amphenol (APH) and Seagate Technology (STX)
Metric	APH	STX
Total Return (1Y)	41.44%	365.43%
Total Return (3Y, Annualized)	58.45%	131.17%
Total Return (5Y, Annualized)	36.04%	61.29%

Risk Profile

Drawdown History

APH

STX

GSPC

Amphenol (APH) vs. Seagate Technology (STX), 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 Seagate Technology (STX). Each bar is the share of months whose return fell in that 5% bucket.

Risk Metrics

Seagate Technology (STX) carries a highly aggressive beta of 2.08, indicating much higher sensitivity to broad-market moves, whereas Amphenol (APH) is closer to market-like at 1.23 — a noticeable difference in market-sensitivity profile.

Risk profile metrics for Amphenol (APH) and Seagate Technology (STX)
Metric	APH	STX
Volatility (1Y, Annualized)	45.05%	74.37%
Beta (5Y)	1.23	2.08
Max Drawdown (5Y)	-28.73%	-56.99%
Avg. Volume (3M)	14.06M	4.68M

Risk-Adjusted Performance

Risk-Return Positioning

APH and STX 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 Seagate Technology (STX)
Metric	APH	STX
Sharpe Ratio (1Y)	0.83	4.86
Sortino Ratio (1Y)	1.17	7.99

Profitability

ROE (TTM)

Both companies show strong equity returns, but Seagate Technology (STX) at 371.53% is the standout with ROE above its industry range; Amphenol (APH) at 38.12% also sits in the top quartile.

APH

Technology Hardware & Equipment industry group

38.12%

Max: 44.01%
APH: 38.12%
Q3: 18.98%
Median: 10.41%
Q1: 1.17%
Min: -24.95%

STX

Technology Hardware & Equipment industry group

371.53%

STX: 371.53%
Max: 44.01%
Q3: 18.98%
Median: 10.41%
Q1: 1.17%
Min: -24.95%

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

Net Margin (TTM)

For every dollar of sales, both Amphenol (APH) at 17.73% and Seagate Technology (STX) at 26.11% retain more as net profit than most peers, landing in the top net margin quartile of their industries.

APH

Technology Hardware & Equipment industry group

17.73%

Max: 26.11%
APH: 17.73%
Q3: 10.87%
Median: 3.75%
Q1: 0.00%
Min: -14.17%

STX

Technology Hardware & Equipment industry group

26.11%

STX: 26.11%
Max: 26.11%
Q3: 10.87%
Median: 3.75%
Q1: 0.00%
Min: -14.17%

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

Operating Margin (TTM)

Seagate Technology (STX) at 43.07% shows unusually strong operating efficiency — above its industry’s operating margin range — and Amphenol (APH) at 29.78% also operates in the top quartile.

APH

Technology Hardware & Equipment industry group

29.78%

Max: 36.27%
APH: 29.78%
Q3: 17.72%
Median: 7.45%
Q1: 1.68%
Min: -21.39%

STX

Technology Hardware & Equipment industry group

43.07%

STX: 43.07%
Max: 36.27%
Q3: 17.72%
Median: 7.45%
Q1: 1.68%
Min: -21.39%

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

Profitability Metrics

Profitability metrics for Amphenol (APH) and Seagate Technology (STX)
Metric	APH	STX
ROE (TTM)	38.12%	371.53%
ROA (TTM)	14.47%	29.36%
Net Margin (TTM)	17.73%	26.11%
Operating Margin (TTM)	29.78%	43.07%
Gross Margin (TTM)	38.95%	45.58%

Growth

Revenue Growth

Both Amphenol (APH) at 51.71% and Seagate Technology (STX) at 34.06% sit in the top peer quartile for revenue growth, so each is growing its top line faster than typical industry peers.

Amphenol (APH) vs. Seagate Technology (STX): A comparison of their Revenue Growth across different time periods.

EPS Growth

Both Amphenol (APH) at 73.96% and Seagate Technology (STX) at 105.31% sit in the top peer quartile for EPS growth, so each is compounding per-share earnings faster than typical industry peers.

Amphenol (APH) vs. Seagate Technology (STX): A comparison of their EPS Growth across different time periods.

Growth Metrics

Growth metrics for Amphenol (APH) and Seagate Technology (STX)
Metric	APH	STX
Revenue Growth (YoY)	51.71%	34.06%
Revenue Growth (3Y CAGR)	22.31%	18.20%
EPS Growth (YoY)	73.96%	105.31%
EPS Growth (3Y CAGR)	29.72%	--

Financial Strength

Current Ratio (MRQ)

Both Amphenol (APH) at 1.89 and Seagate Technology (STX) at 1.67 carry current ratio within their industries’ typical mid-ranges, suggesting balanced short-term liquidity relative to peers.

APH

Technology Hardware & Equipment industry group

1.89

Max: 5.34
Q3: 2.96
APH: 1.89
Median: 1.89
Q1: 1.31
Min: 0.17

STX

Technology Hardware & Equipment industry group

1.67

Max: 5.34
Q3: 2.96
Median: 1.89
STX: 1.67
Q1: 1.31
Min: 0.17

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

Debt / Equity (MRQ)

Both Amphenol (APH) at 1.20 and Seagate Technology (STX) at 1.80 lean more heavily on debt funding than most peers, landing in the higher-leverage quartile of their industries.

APH

Technology Hardware & Equipment industry group

1.20

Max: 1.80
APH: 1.20
Q3: 0.87
Median: 0.28
Q1: 0.04
Min: 0.00

STX

Technology Hardware & Equipment industry group

1.80

STX: 1.80
Max: 1.80
Q3: 0.87
Median: 0.28
Q1: 0.04
Min: 0.00

Amphenol (APH) vs. Seagate Technology (STX): 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 Seagate Technology (STX)
Metric	APH	STX
Current Ratio (MRQ)	1.89	1.67
Debt / Equity (MRQ)	1.20	1.80
Net Debt / EBITDA	1.42	0.49

Dividends

Dividend Yield (TTM)

Both Amphenol (APH) at 0.57% and Seagate Technology (STX) at 0.37% offer top-quartile dividend income relative to share price within their industries.

APH

Technology Hardware & Equipment industry group

0.57%

Max: 0.74%
APH: 0.57%
Q3: 0.33%
Median: 0.00%
Q1: 0.00%
Min: 0.00%

STX

Technology Hardware & Equipment industry group

0.37%

Max: 0.74%
STX: 0.37%
Q3: 0.33%
Median: 0.00%
Q1: 0.00%
Min: 0.00%

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

Dividend Payout Ratio (TTM)

Both Amphenol (APH) at 22.88% and Seagate Technology (STX) at 21.15% pay out an above-typical share of earnings for their industries, leaving thinner cover if profits dip.

APH

Technology Hardware & Equipment industry group

22.88%

Max: 32.21%
APH: 22.88%
Q3: 13.44%
Median: 0.00%
Q1: 0.00%
Min: 0.00%

STX

Technology Hardware & Equipment industry group

21.15%

Max: 32.21%
STX: 21.15%
Q3: 13.44%
Median: 0.00%
Q1: 0.00%
Min: 0.00%

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

Dividend Metrics

Dividend metrics for Amphenol (APH) and Seagate Technology (STX)
Metric	APH	STX
Dividend Yield (TTM)	0.57%	0.37%
Dividend Payout Ratio (TTM)	22.88%	21.15%

Valuation

P/E Ratio (TTM)

Amphenol (APH) at 41.96 is near its industry’s usual P/E ratio, while Seagate Technology (STX) at 60.97 sits in the richer quartile — STX needs stronger growth or earnings quality to justify the premium.

APH

Technology Hardware & Equipment industry group

41.96

Max: 92.76
Q3: 54.79
APH: 41.96
Median: 33.67
Q1: 22.48
Min: 12.30

STX

Technology Hardware & Equipment industry group

60.97

Max: 92.76
STX: 60.97
Q3: 54.79
Median: 33.67
Q1: 22.48
Min: 12.30

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

P/S Ratio (TTM)

Amphenol (APH) at 7.13 prices around its industry’s typical P/S ratio, while Seagate Technology (STX) at 15.81 clears its benchmark range — STX looks notably rich on sales.

APH

Technology Hardware & Equipment industry group

7.13

Max: 15.48
Q3: 7.22
APH: 7.13
Median: 3.14
Q1: 1.32
Min: 0.00

STX

Technology Hardware & Equipment industry group

15.81

STX: 15.81
Max: 15.48
Q3: 7.22
Median: 3.14
Q1: 1.32
Min: 0.00

Amphenol (APH) vs. Seagate Technology (STX): 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 13.35 sits in the upper P/B ratio quartile, and Seagate Technology (STX) at 88.88 prices even higher, above its industry range.

APH

Technology Hardware & Equipment industry group

13.35

APH: 13.35
Max: 13.35
Q3: 7.14
Median: 3.63
Q1: 2.13
Min: 0.10

STX

Technology Hardware & Equipment industry group

88.88

STX: 88.88
Max: 13.35
Q3: 7.14
Median: 3.63
Q1: 2.13
Min: 0.10

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

Valuation Metrics

Valuation metrics for Amphenol (APH) and Seagate Technology (STX)
Metric	APH	STX
P/E Ratio (TTM)	41.96	60.97
P/S Ratio (TTM)	7.13	15.81
P/B Ratio (MRQ)	13.35	88.88
Free Cash Flow Yield (TTM)	1.85%	1.01%