IONQ vs QUBT vs ARQQ Stock Comparison

IonQ, Quantum Computing and Arqit Quantum Prices as of Oct 23, 2026 Peers: Industry group
IONQ IonQ, Inc.
$31.27 -26.5% 1M -47.3% 1Y
Market cap
$11.30B
P/E
–
Revenue (TTM)
$246.47M
Div. yield
–
Quantum Computing Technology
3 wins
QUBT Quantum Computing Inc.
$6.56 -28.1% 1M -58.8% 1Y
Market cap
$1.44B
P/E
–
Revenue (TTM)
$9.82M
Div. yield
–
Quantum Computing Technology
4 wins
ARQQ Arqit Quantum Inc.
$16.41 -27.2% 1M -58.0% 1Y
Market cap
$224.75M
P/E
–
Revenue (TTM)
—
Div. yield
–
Quantum Computing Technology

Head to Head

7 decided of 12

Quantum Computing leads on 4 of the 12 questions below (Quantum Computing 4, IonQ 3). Which ones matter depends on what you are buying for; a cheap multiple and slow growth often come together.

QuestionIONQQUBTARQQLeader
Larger companyMarket capitalisation $11.30B $1.44B $224.75M IONQ
Cheaper on earningsLower P/E, profitable companies only -8.1x -96.2x — –
Cheaper on forward earningsLower price / next fiscal year consensus EPS — — — –
Faster revenue growthRevenue growth, trailing twelve months +370.6% +3,635.4% — QUBT
More profitableNet margin, trailing twelve months -567.8% -152.5% — QUBT
Better return on capitalReturn on invested capital — — — –
Less leveragedLower net debt / EBITDA — — — –
Higher dividend yieldTrailing dividend yield 0.00% 0.00% 0.00% –
Better 1-year returnPrice return, last 12 months -47.3% -58.8% -58.0% IONQ
Better 5-year returnAnnualised price return, 5 years +26.5%/yr +4.4%/yr -47.6%/yr IONQ
Less volatileAnnualised volatility, 1 year 90.6% 88.8% 111.5% QUBT
Higher overall scoreMean of the five percentile scores vs peers 26/100 33/100 — QUBT

Percentile Scorecard

IONQQUBTARQQ

Each axis is the mean percentile of its metrics against the company's industry group. 100 is the best in the group, 50 the middle.

Scores by Axis

AxisIONQQUBTARQQ
Valuation 14 #107 of 124 25 #93 of 124 –
Growth 18 #93 of 113 29 #81 of 113 –
Profitability 12 #97 of 110 17 #91 of 110 –
Financial Health 78 #29 of 129 93 #10 of 129 84 #22 of 129
Shareholder Returns 6 #64 of 68 2 #67 of 68 –
Overall 26 33 –
  • IONQ ranked among 137 companies in Infrastructure Software
  • QUBT ranked among 137 companies in Infrastructure Software
  • ARQQ ranked among 137 companies in Infrastructure Software

Price Performance

Price return, split-adjusted, before dividends. Click a name to hide or show it.

Returns

PeriodIONQQUBTARQQSPY
1 month -26.5%-28.1%-27.2% -1.0%
3 months -4.8%-11.7%-1.4% +2.9%
6 months -26.8%-26.6%+12.9% +6.4%
Year to date -30.3%-36.1%-25.0% +11.4%
1 year -47.3%-58.8%-58.0% +13.1%
3 years +184.0%+637.1%+49.2% +79.4%
3 years, per year +41.7%+94.7%+14.3% +21.5%
5 years +223.7%+24.2%-96.0% +67.7%
5 years, per year +26.5%+4.4%-47.6% +10.9%
10 years —+3,180.0%— +255.2%
10 years, per year —+41.8%— +13.5%

Risk

MeasureIONQQUBTARQQSPY
Volatility, 1Y 90.6%88.8%111.5% 12.7%
Downside volatility, 1Y 84.9%85.7%103.0% 12.7%
Beta vs S&P 500, 1Y 3.553.654.12 1.00
Return / volatility, 1Y -0.52-0.66-0.52 1.03
Max drawdown, 5Y -90.0%-94.4%-99.6% -25.4%
From 52-week high -56.6%-60.7%-65.1% -2.5%
52-week high $72.07$16.71$47.04 $779.14
52-week low $26.59$6.31$11.78 $631.97

Valuation History

Weekly multiples on trailing twelve-month fundamentals. Negative or extreme readings (a loss year, a collapsed denominator) are left out so the chart stays readable.

MultipleIONQQUBTARQQ
P/E now vs peer median -8.2xmedian 37.4x -98.4xmedian 37.4x —median 37.4x
P/S now vs peer median 48.3xmedian 4.4x 151.1xmedian 4.4x —median 4.4x
EV/EBITDA now vs peer median -11.5xmedian 35.0x -7.7xmedian 35.0x —median 35.0x
P/FCF now vs peer median -24.6xmedian 27.2x -28.8xmedian 27.2x —median 27.2x
P/B now vs peer median 3.6xmedian 3.4x 0.9xmedian 3.4x 8.8xmedian 3.4x
PEG now vs peer median 0.09median 1.27 -2.45median 1.27 —median 1.27

Financial History

Reported figures by fiscal period, placed on the calendar year (or quarter) each period ended in, so companies with different fiscal years line up.

Trailing twelve monthsIONQQUBTARQQ
Revenue $246.47M $9.82M –
Gross profit $72.26M -$1.86M –
Operating income -$1.01B -$76.18M –
Net income -$1.37B -$14.98M –
Free cash flow -$483.87M -$51.48M –
R&D $448.76M $26.91M –
EPS (diluted) $-3.81 $-0.07 –
Cash & equivalents $1.24B $189.15M $28.86M
Shares (diluted) 367.66M 224.73M 13.79M
Enterprise value $3.67B -$2.17B $115.42M

All Metrics

58 metrics · best in bold

Bold marks the best reading: the lowest positive value for multiples, leverage and payout, the highest for everything else. The bar under each value is its percentile against that company's own peers. Hover a value for its rank and the peer median.

Valuation

12 metrics
MetricIONQQUBTARQQ
P/E -8.2x -98.4x –
P/FCF -24.6x -28.8x –
P/Operating cash flow -26.3x -34.5x –
P/S 48.3x 151.1x –
P/B 3.6x 0.9x 8.8x
P/Tangible book 4.7x 1.0x 9.5x
EV/EBITDA -11.5x -7.7x –
EV/EBIT -9.7x -7.0x –
EV/Revenue 39.7x 54.0x –
EV/FCF -20.2x -10.3x –
EV/Operating cash flow -21.7x -12.3x –
PEG (3Y EPS CAGR) 0.09 -2.45 –

Growth

14 metrics
MetricIONQQUBTARQQ
Revenue growth (1Y) 370.6% 3,635% –
Revenue CAGR (3Y) 146.9% 230.4% –
Gross profit growth (1Y) 156.5% -2,367% –
Gross profit CAGR (3Y) 83.0% -158.9% –
Operating income growth (1Y) -174.2% -132.2% –
Operating income CAGR (3Y) -109.4% -36.2% –
Net income growth (1Y) -194.3% 80.4% –
Net income CAGR (3Y) -129.1% 18.1% –
EPS growth (1Y) -106.1% 87.7% –
EPS CAGR (3Y) -88.9% 40.2% –
Operating cash flow growth (1Y) -213.6% -128.0% –
Operating cash flow CAGR (3Y) -98.7% -41.0% –
Free cash flow growth (1Y) -212.0% -105.7% –
Free cash flow CAGR (3Y) -97.9% -45.3% –

Profitability

14 metrics
MetricIONQQUBTARQQ
Gross margin 29.3% -18.9% –
EBITDA margin -345.7% -697.4% –
Operating margin -408.2% -775.5% –
Pretax margin -571.3% -152.5% –
Net margin -567.8% -152.5% –
FCF margin -196.3% -524.0% –
Operating cash flow margin -183.5% -438.3% –
Return on equity -32.8% -0.9% –
Return on assets -20.3% -0.9% –
Return on invested capital – – –
Return on capital employed -15.5% -4.7% –
Asset turnover 0.0x 0.0x –
Cash conversion (OCF / net income) 0.3x 2.9x –
Stock comp / revenue 186.1% 86.5% –

Financial Health

11 metrics
MetricIONQQUBTARQQ
Debt / assets – – –
Debt / equity – – –
Net debt / EBITDA – – –
Debt / FCF – – –
Liabilities / assets 50.7% 2.9% 21.3%
Equity / assets 49.3% 97.1% 78.7%
Interest coverage – -577.1x –
Current ratio 10.7x 53.1x 4.9x
Quick ratio 9.8x 51.7x 4.9x
Cash ratio 9.4x 51.3x 4.4x
Altman Z-score 1.55 19.25 –

Shareholder Returns

7 metrics
MetricIONQQUBTARQQ
Dividend yield – – –
Net buyback yield -25.1% -80.7% –
Shareholder yield -25.1% -80.7% –
Payout ratio (earnings) – – –
Payout ratio (FCF) – – –
Dividend growth (1Y) – – –
Dividend CAGR (3Y) – – –

Analyst Estimates

Solid lines are reported fiscal-year results; dashed lines are the consensus for the years ahead. Hover a year for the analysts' high and low, and how each result compared with its estimate.

ConsensusIONQQUBTARQQ
EPS, next fiscal year $-1.36FY2026 $-0.16FY2026 $-1.46FY2026
Revenue, next fiscal year $458.50MFY2026 $29.28MFY2026 $2.41MFY2026
Revenue growth, next FY +252.6%FY2026 +4,193.8%FY2026 +355.4%FY2026
Revenue growth, the year after +71.5% +84.3% +208.4%

Institutional Ownership

13F filings, quarter ended Jun 30, 2026
HoldersIONQQUBTARQQ
Held by institutions 53.3% 45.4% 89.2%
Institutions holding 780 313 65
Change in shares held, QoQ -2.4% +10.7% +205.7%
Institutions buying 536 195 41
Institutions selling 154 61 11
Buyers to sellers 3.48 3.20 3.73

Return Correlation

Daily returns, last 12 months

1.00 means two stocks move in lockstep, 0 that they move independently. Pairs below about 0.5 diversify each other.

IONQQUBTARQQ
IONQ 1.00 0.84 0.62
QUBT 0.84 1.00 0.65
ARQQ 0.62 0.65 1.00

Add a Peer

Largest companies in the same industry

Related Comparisons

Frequently Asked Questions

Which is bigger, IONQ, QUBT and ARQQ?

IonQ (IONQ) is the largest by market capitalisation: IonQ (IONQ) $11.30B, Quantum Computing (QUBT) $1.44B, Arqit Quantum (ARQQ) $224.75M.

Which company is growing faster?

Quantum Computing (QUBT) grew revenue fastest over the trailing twelve months: IonQ (IONQ) +370.6%, Quantum Computing (QUBT) +3,635.4%.

Which company is more profitable?

Quantum Computing (QUBT) has the highest net margin (IonQ (IONQ) -567.8%, Quantum Computing (QUBT) -152.5%).

Which stock has performed better?

Over the past year IonQ (IONQ) returned the most: IonQ (IONQ) -47.3%, Quantum Computing (QUBT) -58.8%, Arqit Quantum (ARQQ) -58.0%. Over five years, IonQ (IONQ) compounded fastest (IonQ (IONQ) +26.5%/yr, Quantum Computing (QUBT) +4.4%/yr, Arqit Quantum (ARQQ) -47.6%/yr). Returns are price only, before dividends.

Which stock is riskier?

By one-year price volatility, Quantum Computing (QUBT) has been the steadiest (IonQ (IONQ) 90.6%, Quantum Computing (QUBT) 88.8%, Arqit Quantum (ARQQ) 111.5%). Volatility measures how widely the price swings, not the risk of the business.

Which is the better stock, IONQ, QUBT and ARQQ?

There is no single answer; it depends on what you are buying for. On the 12 head-to-head measures on this page, Quantum Computing (QUBT) leads on 4. Business Quant does not give investment advice; use the comparison as a starting point for your own research.

Data from SEC filings, exchange prices and consensus estimates, via Business Quant. Percentile scores compare each company with its own peer group, so two companies' scores are each relative to different peers unless you rank against the whole market. Price returns exclude dividends. Nothing on this page is investment advice.