ARQQ vs. IONQ

Last updated Apr 1, 2026

Compare and contrast key facts about Arqit Quantum Inc. (ARQQ) and IonQ, Inc. (IONQ).

Performance

ARQQ vs. IONQ - Performance Comparison

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

ARQQ vs. IONQ - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021
ARQQ Arqit Quantum Inc.	-39.44%	-43.67%	227.76%	-86.87%	-84.93%	111.95%
IONQ IonQ, Inc.	-35.75%	7.42%	237.13%	259.13%	-79.34%	66.83%

Fundamentals

Market Cap ARQQ : $202.62M IONQ : $10.64B
EPS ARQQ : -$5.88 IONQ : -$1.67
PS Ratio ARQQ : 219.28 IONQ : 67.59
PB Ratio ARQQ : 7.44 IONQ : 2.80
Total Revenue (TTM) ARQQ : $924.00K IONQ : $130.02M
Gross Profit (TTM) ARQQ : -$1.28M IONQ : $52.53M
EBITDA (TTM) ARQQ : -$57.09M IONQ : -$429.34M

Returns By Period

In the year-to-date period, ARQQ achieves a -39.44% return, which is significantly lower than IONQ's -35.75% return.

ARQQ

• 1D: 11.34%
• 1M: -19.50%
• YTD: -39.44%
• 6M: -65.81%
• 1Y: -4.40%
• 3Y*: -27.66%
• 5Y*: —
• 10Y*: —

IONQ

• 1D: 8.42%
• 1M: -24.86%
• YTD: -35.75%
• 6M: -53.12%
• 1Y: 30.63%
• 3Y*: 67.36%
• 5Y*: 22.22%
• 10Y*: —

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

Return for Risk

ARQQ vs. IONQ — Risk / Return Rank

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

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: 37
ARQQ Martin Ratio Rank: 38

IONQ

IONQ Risk / Return Rank: 56
IONQ Sharpe Ratio Rank: 54
IONQ Sortino Ratio Rank: 63
IONQ Omega Ratio Rank: 57
IONQ Calmar Ratio Rank: 52
IONQ Martin Ratio Rank: 52

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.

ARQQ vs. IONQ - Risk-Adjusted Trends Comparison

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

	ARQQ	IONQ	Difference
Sharpe ratio Return per unit of total volatility	-0.04	0.32	-0.36
Sortino ratio Return per unit of downside risk	0.79	1.26	-0.46
Omega ratio Gain probability vs. loss probability	1.09	1.14	-0.05
Calmar ratio Return relative to maximum drawdown	-0.15	0.39	-0.54
Martin ratio Return relative to average drawdown	-0.29	0.80	-1.09
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

ARQQ vs. IONQ - Sharpe Ratio Comparison

The current ARQQ Sharpe Ratio is -0.04, which is lower than the IONQ Sharpe Ratio of 0.32. The chart below compares the historical Sharpe Ratios of ARQQ and IONQ, 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

	ARQQ	IONQ	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	-0.04	0.32	-0.36
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	—	0.23	—
Sharpe Ratio (All Time) Calculated using the full available price history	-0.36	0.21	-0.58

Correlation

The correlation between ARQQ and IONQ is 0.40, 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

ARQQ vs. IONQ - Dividend Comparison

Neither ARQQ nor IONQ has paid dividends to shareholders.

Tickers have no history of dividend payments

Drawdowns

ARQQ vs. IONQ - Drawdown Comparison

The maximum ARQQ drawdown since its inception was -99.60%, which is greater than IONQ's maximum drawdown of -90.00%. Use the drawdown chart below to compare losses from any high point for ARQQ and IONQ.

Drawdown Indicators

	ARQQ	IONQ	Difference
Max Drawdown Largest peak-to-trough decline	-99.60%	-90.00%	-9.60%
Max Drawdown (1Y) Largest decline over 1 year	-79.78%	-67.61%	-12.17%
Max Drawdown (5Y) Largest decline over 5 years	—	-90.00%	—
Current Drawdown Current decline from peak	-98.61%	-64.88%	-33.73%
Average Drawdown Average peak-to-trough decline	-88.43%	-51.36%	-37.07%
Ulcer Index Depth and duration of drawdowns from previous peaks	41.91%	32.67%	+9.24%

Volatility

ARQQ vs. IONQ - Volatility Comparison

Arqit Quantum Inc. (ARQQ) has a higher volatility of 20.96% compared to IonQ, Inc. (IONQ) at 16.38%. This indicates that ARQQ's price experiences larger fluctuations and is considered to be riskier than IONQ based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	ARQQ	IONQ	Difference
Volatility (1M) Calculated over the trailing 1-month period	20.96%	16.38%	+4.58%
Volatility (6M) Calculated over the trailing 6-month period	74.53%	66.45%	+8.08%
Volatility (1Y) Calculated over the trailing 1-year period	109.33%	96.73%	+12.60%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	135.03%	98.06%	+36.97%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	135.03%	96.99%	+38.04%

Financials