QMCO vs. ARQQ

Last updated Apr 2, 2026

Compare and contrast key facts about Quantum Corporation (QMCO) and Arqit Quantum Inc. (ARQQ).

Performance

QMCO vs. ARQQ - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Quantum Corporation (QMCO) and Arqit Quantum Inc. (ARQQ). The values are adjusted to include any dividend payments, if applicable.

QMCO vs. ARQQ - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021
QMCO Quantum Corporation	-22.02%	-88.04%	672.49%	-67.98%	-80.25%	-3.33%
ARQQ Arqit Quantum Inc.	-37.89%	-43.67%	227.76%	-86.87%	-84.93%	111.95%

Fundamentals

Market Cap QMCO : $68.86M ARQQ : $207.82M
EPS QMCO : -$8.86 ARQQ : -$5.88
PS Ratio QMCO : 0.22 ARQQ : 224.91
Total Revenue (TTM) QMCO : $261.28M ARQQ : $924.00K
Gross Profit (TTM) QMCO : $97.87M ARQQ : -$1.28M
EBITDA (TTM) QMCO : -$51.03M ARQQ : -$57.09M

Returns By Period

In the year-to-date period, QMCO achieves a -22.02% return, which is significantly higher than ARQQ's -37.89% return.

QMCO

• 1D: 5.89%
• 1M: -5.09%
• YTD: -22.02%
• 6M: -53.81%
• 1Y: -64.25%
• 3Y*: -39.75%
• 5Y*: -50.72%
• 10Y*: -25.56%

ARQQ

• 1D: 2.57%
• 1M: -19.40%
• YTD: -37.89%
• 6M: -67.01%
• 1Y: 1.27%
• 3Y*: -27.05%
• 5Y*: —
• 10Y*: —

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

Return for Risk

QMCO vs. ARQQ — Risk / Return Rank

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

QMCO

QMCO Risk / Return Rank: 11
QMCO Sharpe Ratio Rank: 13
QMCO Sortino Ratio Rank: 14
QMCO Omega Ratio Rank: 16
QMCO Calmar Ratio Rank: 5
QMCO Martin Ratio Rank: 8

ARQQ

ARQQ Risk / Return Rank: 43
ARQQ Sharpe Ratio Rank: 40
ARQQ Sortino Ratio Rank: 51
ARQQ Omega Ratio Rank: 47
ARQQ Calmar Ratio Rank: 40
ARQQ Martin Ratio Rank: 39

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.

QMCO vs. ARQQ - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Quantum Corporation (QMCO) and Arqit Quantum Inc. (ARQQ). 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.

	QMCO	ARQQ	Difference
Sharpe ratio Return per unit of total volatility	-0.63	0.01	-0.65
Sortino ratio Return per unit of downside risk	-0.81	0.88	-1.69
Omega ratio Gain probability vs. loss probability	0.91	1.10	-0.18
Calmar ratio Return relative to maximum drawdown	-0.94	-0.02	-0.91
Martin ratio Return relative to average drawdown	-1.55	-0.05	-1.51
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

QMCO vs. ARQQ - Sharpe Ratio Comparison

The current QMCO Sharpe Ratio is -0.63, which is lower than the ARQQ Sharpe Ratio of 0.01. The chart below compares the historical Sharpe Ratios of QMCO and ARQQ, offering insights into how both investments have performed under varying market conditions. These values are calculated using daily returns over the previous 12 months.

Sharpe Ratios by Period

	QMCO	ARQQ	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	-0.63	0.01	-0.65
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	-0.32	—	—
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	-0.21	—	—
Sharpe Ratio (All Time) Calculated using the full available price history	-0.21	-0.36	+0.15

Correlation

The correlation between QMCO and ARQQ is 0.29, which is considered to be low. This implies their price changes are not closely related. A low correlation is generally favorable for portfolio diversification, as it helps to reduce overall risk by spreading it across multiple assets with different performance patterns.

Dividends

QMCO vs. ARQQ - Dividend Comparison

Neither QMCO nor ARQQ has paid dividends to shareholders.

Tickers have no history of dividend payments

Drawdowns

QMCO vs. ARQQ - Drawdown Comparison

The maximum QMCO drawdown since its inception was -99.93%, roughly equal to the maximum ARQQ drawdown of -99.60%. Use the drawdown chart below to compare losses from any high point for QMCO and ARQQ.

Drawdown Indicators

	QMCO	ARQQ	Difference
Max Drawdown Largest peak-to-trough decline	-99.93%	-99.60%	-0.33%
Max Drawdown (1Y) Largest decline over 1 year	-69.17%	-79.78%	+10.61%
Max Drawdown (5Y) Largest decline over 5 years	-98.65%	—	—
Max Drawdown (10Y) Largest decline over 10 years	-98.67%	—	—
Current Drawdown Current decline from peak	-99.85%	-98.57%	-1.28%
Average Drawdown Average peak-to-trough decline	-88.01%	-88.43%	+0.42%
Ulcer Index Depth and duration of drawdowns from previous peaks	41.84%	42.19%	-0.35%

Volatility

QMCO vs. ARQQ - Volatility Comparison

Quantum Corporation (QMCO) has a higher volatility of 27.28% compared to Arqit Quantum Inc. (ARQQ) at 20.71%. This indicates that QMCO's price experiences larger fluctuations and is considered to be riskier than ARQQ based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	QMCO	ARQQ	Difference
Volatility (1M) Calculated over the trailing 1-month period	27.28%	20.71%	+6.57%
Volatility (6M) Calculated over the trailing 6-month period	64.31%	73.91%	-9.60%
Volatility (1Y) Calculated over the trailing 1-year period	101.71%	109.05%	-7.34%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	157.72%	134.98%	+22.74%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	124.19%	134.98%	-10.79%

Financials