APH vs. ONTO

Last updated Jun 13, 2026

APH (Amphenol Corporation) and ONTO (Onto Innovation Inc.) are both stocks. Both are in the Technology sector — APH in Electronic Components, ONTO in Semiconductor Equipment & Materials. Over the past 10 years, APH returned 27.74%/yr vs 33.01%/yr for ONTO. At a 0.33 correlation, their price movements are largely independent.

Performance

APH vs. ONTO - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Amphenol Corporation (APH) and Onto Innovation Inc. (ONTO). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, APH achieves a 14.03% return, which is significantly lower than ONTO's 105.17% return. Over the past 10 years, APH has underperformed ONTO with an annualized return of 27.74%, while ONTO has yielded a comparatively higher 33.01% annualized return.

APH

• 1D: 0.88%
• 1M: 23.04%
• YTD: 14.03%
• 6M: 19.47%
• 1Y: 67.47%
• 3Y*: 57.45%
• 5Y*: 36.37%
• 10Y*: 27.74%

ONTO

• 1D: 6.70%
• 1M: 19.17%
• YTD: 105.17%
• 6M: 107.14%
• 1Y: 242.01%
• 3Y*: 42.57%
• 5Y*: 33.99%
• 10Y*: 33.01%

*Multi-year figures are annualized to reflect compound growth (CAGR)

APH vs. ONTO - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
APH Amphenol Corporation	14.03%	96.08%	41.30%	31.85%	-11.96%	35.25%	22.09%	34.91%	-6.82%	31.81%
ONTO Onto Innovation Inc.	105.17%	-5.29%	9.01%	124.56%	-32.74%	112.89%	30.13%	33.70%	9.67%	-0.56%

Correlation

The correlation between APH and ONTO is 0.43, which is low. Their price movements are largely independent, making them effective diversification partners.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.43
Correlation (3Y) Calculated over the trailing 3-year period	0.50
Correlation (5Y) Calculated over the trailing 5-year period	0.58
Correlation (10Y) Calculated over the trailing 10-year period	0.56
Correlation (All Time) Calculated using the full available price history since Feb 26, 1992	0.33

The correlation between APH and ONTO shifts across timeframes, from 0.33 (all time) to 0.58 (5 years), reflecting how their relationship changes across market environments.

Fundamentals

Market Cap APH : $198.36B ONTO : $16.20B
EPS APH : $4.58 ONTO : $2.15
PE Ratio APH : 33.54 ONTO : 150.40
PEG Ratio APH : 1.12 ONTO : 13.49
PS Ratio APH : 7.62 ONTO : 15.53
PB Ratio APH : 14.19 ONTO : 7.60
Total Revenue (TTM) APH : $25.90B ONTO : $1.03B
Gross Profit (TTM) APH : $9.67B ONTO : $502.93M
EBITDA (TTM) APH : $7.45B ONTO : $177.93M

Return for Risk

APH vs. ONTO — Risk / Return Rank

Compare risk-adjusted metric ranks to identify better-performing investments over the past 12 months.

APH

APH Risk / Return Rank: 80
APH Sharpe Ratio Rank: 84
APH Sortino Ratio Rank: 77
APH Omega Ratio Rank: 79
APH Calmar Ratio Rank: 79
APH Martin Ratio Rank: 80

ONTO

ONTO Risk / Return Rank: 96
ONTO Sharpe Ratio Rank: 98
ONTO Sortino Ratio Rank: 95
ONTO Omega Ratio Rank: 93
ONTO Calmar Ratio Rank: 98
ONTO Martin Ratio Rank: 98

The rank (0–100) shows how this investment's returns compare to the risk taken. Higher = better. Based on the past 12 months of data, combining Sharpe, Sortino, and other metrics used by quantitative funds and institutional investors.

APH vs. ONTO - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Amphenol Corporation (APH) and Onto Innovation Inc. (ONTO). Risk-adjusted metrics are performance indicators that assess an investment's returns in relation to its risk, enabling a more accurate comparison of different investment options.

Values are calculated on a 1-year rolling basis and updated daily. Risk-adjusted metrics are more stable over longer periods — use the period switch above to explore them.

	APH	ONTO	Difference
Sharpe ratio: Return per unit of total volatility	1.54	3.91	-2.37
Sortino ratio: Return per unit of downside risk	1.98	3.76	-1.78
Omega ratio: Gain probability vs. loss probability	1.28	1.47	-0.19
Calmar ratio: Return relative to maximum drawdown	2.27	11.14	-8.86
Martin ratio: Return relative to average drawdown	5.85	30.28	-24.43

APH vs. ONTO - Sharpe Ratio Comparison

The current APH Sharpe Ratio is 1.54, which is lower than the ONTO Sharpe Ratio of 3.91. The chart below compares the historical Sharpe Ratios of APH and ONTO, calculated using daily returns over the previous 12 months. A higher Sharpe Ratio indicates better risk-adjusted performance relative to the risk-free rate.

Drawdowns

APH vs. ONTO - Drawdown Comparison

The maximum APH drawdown since its inception was -63.41%, smaller than the maximum ONTO drawdown of -98.56%. Use the drawdown chart below to compare losses from any high point for APH and ONTO.

Drawdown Indicators

	APH	ONTO	Difference
Max Drawdown Largest peak-to-trough decline	-63.41%	-98.56%	+35.15%
Max Drawdown (1Y) Largest decline over 1 year	-28.19%	-20.24%	-7.95%
Max Drawdown (3Y) Largest decline over 3 years	-28.19%	-62.82%	+34.63%
Max Drawdown (5Y) Largest decline over 5 years	-28.73%	-62.82%	+34.09%
Max Drawdown (10Y) Largest decline over 10 years	-37.56%	-62.82%	+25.26%
Current Drawdown Current decline from peak	-7.31%	0.00%	-7.31%
Average Drawdown Average peak-to-trough decline	-13.56%	-54.69%	+41.13%
Ulcer Index Depth and duration of drawdowns from previous peaks	10.92%	7.45%	+3.47%

Volatility

APH vs. ONTO - Volatility Comparison

The current volatility for Amphenol Corporation (APH) is 15.50%, while Onto Innovation Inc. (ONTO) has a volatility of 22.52%. This indicates that APH experiences smaller price fluctuations and is considered to be less risky than ONTO based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	APH	ONTO	Difference
Volatility (1M) Calculated over the trailing 1-month period	15.50%	22.52%	-7.02%
Volatility (6M) Calculated over the trailing 6-month period	37.39%	44.08%	-6.69%
Volatility (1Y) Calculated over the trailing 1-year period	41.68%	57.63%	-15.95%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	30.75%	55.75%	-25.00%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	27.93%	51.41%	-23.48%

Dividends

APH vs. ONTO - Dividend Comparison

APH's dividend yield for the trailing twelve months is around 0.54%, while ONTO has not paid dividends to shareholders.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
APH Amphenol Corporation	0.54%	0.55%	0.79%	1.07%	1.06%	0.89%	0.80%	0.89%	1.09%	0.80%	0.86%	1.01%
ONTO Onto Innovation Inc.	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%

Financials

APH vs. ONTO - Profitability Comparison

The chart below illustrates the profitability comparison between Amphenol Corporation and Onto Innovation Inc. over time, highlighting three key metrics: Gross Profit Margin, Operating Margin, and Net Profit Margin.

APH - Gross Margin

Gross margin is calculated as gross profit divided by revenue. For the three months ending on Jun 2026, Amphenol Corporation reported a gross profit of 2.80B and revenue of 7.62B. Therefore, the gross margin over that period was 36.8%.

ONTO - Gross Margin

Gross margin is calculated as gross profit divided by revenue. For the three months ending on Jun 2026, Onto Innovation Inc. reported a gross profit of 146.39M and revenue of 291.95M. Therefore, the gross margin over that period was 50.1%.

APH - Operating Margin

Operating margin is calculated as operating income divided by revenue. For the three months ending on Jun 2026, Amphenol Corporation reported an operating income of 1.83B and revenue of 7.62B, resulting in an operating margin of 24.0%.

ONTO - Operating Margin

Operating margin is calculated as operating income divided by revenue. For the three months ending on Jun 2026, Onto Innovation Inc. reported an operating income of 33.51M and revenue of 291.95M, resulting in an operating margin of 11.5%.

APH - Net Margin

Net margin is calculated as net income divided by revenue. For the three months ending on Jun 2026, Amphenol Corporation reported a net income of 2.35B and revenue of 7.62B, resulting in a net margin of 30.8%.

ONTO - Net Margin

Net margin is calculated as net income divided by revenue. For the three months ending on Jun 2026, Onto Innovation Inc. reported a net income of 33.75M and revenue of 291.95M, resulting in a net margin of 11.6%.

Frequently Asked Questions

Can I hold both APH and ONTO in my portfolio?

APH and ONTO have a correlation of 0.43, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, APH or ONTO?

ONTO has higher volatility (22.52%) compared to APH (15.50%). In terms of maximum drawdown, APH dropped -63.41% vs ONTO's -98.56%.

Which has better risk-adjusted returns?

ONTO currently has the higher Sharpe Ratio (3.91 vs 1.54), meaning it's delivered slightly more return per unit of risk over the trailing 12 months. However, this ranking shifts over time - use the Risk/Return Score above for a more comprehensive view that combines Sharpe, Sortino, and other measures used by quantitative funds.