AOSL vs. ARM

Last updated Jun 4, 2026

AOSL (Alpha and Omega Semiconductor Limited) and ARM (Arm Holdings plc American Depositary Shares) are both stocks. Both operate in the Semiconductors industry within the Technology sector. Over the past year, AOSL returned 129.72% vs 219.79% for ARM. At a 0.47 correlation, their price movements are largely independent.

Performance

AOSL vs. ARM - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Alpha and Omega Semiconductor Limited (AOSL) and Arm Holdings plc American Depositary Shares (ARM). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, AOSL achieves a 166.13% return, which is significantly lower than ARM's 276.75% return.

AOSL

• 1D: -1.13%
• 1M: 24.99%
• YTD: 166.13%
• 6M: 142.73%
• 1Y: 129.72%
• 3Y*: 22.53%
• 5Y*: 11.06%
• 10Y*: 14.36%

ARM

• 1D: 2.26%
• 1M: 102.61%
• YTD: 276.75%
• 6M: 195.88%
• 1Y: 219.79%
• 3Y*: —
• 5Y*: —
• 10Y*: —

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

AOSL vs. ARM - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023
AOSL Alpha and Omega Semiconductor Limited	166.13%	-46.50%	42.10%	-13.22%
ARM Arm Holdings plc American Depositary Shares	276.75%	-11.39%	64.16%	18.17%

Correlation

The correlation between AOSL and ARM is 0.47, which is low. Their price movements are largely independent, making them effective diversification partners.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.47
Correlation (All Time) Calculated using the full available price history since Sep 15, 2023	0.47

Fundamentals

Market Cap AOSL : $1.58B ARM : $439.83B
EPS AOSL : -$2.58 ARM : $0.85
PS Ratio AOSL : 2.30 ARM : 89.38
PB Ratio AOSL : 1.97 ARM : 53.08
Total Revenue (TTM) AOSL : $685.04M ARM : $4.92B
Gross Profit (TTM) AOSL : $153.49M ARM : $4.66B
EBITDA (TTM) AOSL : -$23.38M ARM : $1.37B

Return for Risk

AOSL vs. ARM — Risk / Return Rank

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

AOSL

AOSL Risk / Return Rank: 81
AOSL Sharpe Ratio Rank: 85
AOSL Sortino Ratio Rank: 79
AOSL Omega Ratio Rank: 83
AOSL Calmar Ratio Rank: 81
AOSL Martin Ratio Rank: 77

ARM

ARM Risk / Return Rank: 92
ARM Sharpe Ratio Rank: 95
ARM Sortino Ratio Rank: 93
ARM Omega Ratio Rank: 92
ARM Calmar Ratio Rank: 92
ARM Martin Ratio Rank: 88

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.

AOSL vs. ARM - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Alpha and Omega Semiconductor Limited (AOSL) and Arm Holdings plc American Depositary Shares (ARM). 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.

	AOSL	ARM	Difference
Sharpe ratio Return per unit of total volatility	1.73	3.39	-1.66
Sortino ratio Return per unit of downside risk	2.25	3.81	-1.55
Omega ratio Gain probability vs. loss probability	1.34	1.48	-0.15
Calmar ratio Return relative to maximum drawdown	2.88	5.34	-2.46
Martin ratio Return relative to average drawdown	5.71	10.57	-4.87
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

AOSL vs. ARM - Sharpe Ratio Comparison

The current AOSL Sharpe Ratio is 1.73, which is lower than the ARM Sharpe Ratio of 3.39. The chart below compares the historical Sharpe Ratios of AOSL and ARM, calculated using daily returns over the previous 12 months. A higher Sharpe Ratio indicates better risk-adjusted performance relative to the risk-free rate.

Sharpe Ratios by Period

	AOSL	ARM	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	1.73	3.39	-1.66
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.16	—	—
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.23	—	—
Sharpe Ratio (All Time) Calculated using the full available price history	0.13	1.32	-1.20

Drawdowns

AOSL vs. ARM - Drawdown Comparison

The maximum AOSL drawdown since its inception was -75.27%, which is greater than ARM's maximum drawdown of -53.97%. Use the drawdown chart below to compare losses from any high point for AOSL and ARM.

Drawdown Indicators

	AOSL	ARM	Difference
Max Drawdown Largest peak-to-trough decline	-75.27%	-53.97%	-21.30%
Max Drawdown (1Y) Largest decline over 1 year	-45.32%	-41.47%	-3.85%
Max Drawdown (3Y) Largest decline over 3 years	-66.94%	—	—
Max Drawdown (5Y) Largest decline over 5 years	-75.27%	—	—
Max Drawdown (10Y) Largest decline over 10 years	-75.27%	—	—
Current Drawdown Current decline from peak	-19.78%	0.00%	-19.78%
Average Drawdown Average peak-to-trough decline	-43.24%	-21.42%	-21.82%
Ulcer Index Depth and duration of drawdowns from previous peaks	22.82%	20.88%	+1.94%

Volatility

AOSL vs. ARM - Volatility Comparison

Alpha and Omega Semiconductor Limited (AOSL) has a higher volatility of 43.14% compared to Arm Holdings plc American Depositary Shares (ARM) at 33.02%. This indicates that AOSL's price experiences larger fluctuations and is considered to be riskier than ARM based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	AOSL	ARM	Difference
Volatility (1M) Calculated over the trailing 1-month period	43.14%	33.02%	+10.12%
Volatility (6M) Calculated over the trailing 6-month period	57.24%	53.31%	+3.93%
Volatility (1Y) Calculated over the trailing 1-year period	75.62%	65.24%	+10.38%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	69.66%	75.37%	-5.71%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	63.40%	75.37%	-11.97%

Dividends

AOSL vs. ARM - Dividend Comparison

Neither AOSL nor ARM has paid dividends to shareholders.

Tickers have no history of dividend payments

Financials

AOSL vs. ARM - Profitability Comparison

The chart below illustrates the profitability comparison between Alpha and Omega Semiconductor Limited and Arm Holdings plc American Depositary Shares over time, highlighting three key metrics: Gross Profit Margin, Operating Margin, and Net Profit Margin.

AOSL - Gross Margin

Gross margin is calculated as gross profit divided by revenue. For the three months ending on Jun 2026, Alpha and Omega Semiconductor Limited reported a gross profit of 34.53M and revenue of 163.79M. Therefore, the gross margin over that period was 21.1%.

ARM - Gross Margin

Gross margin is calculated as gross profit divided by revenue. For the three months ending on Jun 2026, Arm Holdings plc American Depositary Shares reported a gross profit of 1.39B and revenue of 1.49B. Therefore, the gross margin over that period was 93.1%.

AOSL - Operating Margin

Operating margin is calculated as operating income divided by revenue. For the three months ending on Jun 2026, Alpha and Omega Semiconductor Limited reported an operating income of -14.06M and revenue of 163.79M, resulting in an operating margin of -8.6%.

ARM - Operating Margin

Operating margin is calculated as operating income divided by revenue. For the three months ending on Jun 2026, Arm Holdings plc American Depositary Shares reported an operating income of 440.00M and revenue of 1.49B, resulting in an operating margin of 29.5%.

AOSL - Net Margin

Net margin is calculated as net income divided by revenue. For the three months ending on Jun 2026, Alpha and Omega Semiconductor Limited reported a net income of 15.42M and revenue of 163.79M, resulting in a net margin of 9.4%.

ARM - Net Margin

Net margin is calculated as net income divided by revenue. For the three months ending on Jun 2026, Arm Holdings plc American Depositary Shares reported a net income of 313.00M and revenue of 1.49B, resulting in a net margin of 21.0%.

Frequently Asked Questions

Can I hold both AOSL and ARM in my portfolio?

AOSL and ARM have a correlation of 0.47, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, AOSL or ARM?

AOSL has higher volatility (43.14%) compared to ARM (33.02%). In terms of maximum drawdown, AOSL dropped -75.27% vs ARM's -53.97%.

Which has better risk-adjusted returns?

ARM currently has the higher Sharpe Ratio (3.39 vs 1.73), 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.