Arqit Quantum Inc.
Arqit Quantum Inc. is a London-based cybersecurity company focused on quantum-safe encryption software. Arqit Quantum Inc. provides the QuantumCloud platform, which helps secure communications links for networked devices, cloud systems, and data at rest against current and future forms of cyber attack, including threats associated with quantum computing. The company’s offerings center on symmetric key agreement technology delivered through software-based services, with related maintenance, support, and professional services. Arqit Quantum Inc. serves organizations that need stronger protection for sensitive information across digital infrastructure, including telecom, enterprise, and cloud environments. Its role in the financial market reflects growing demand for advanced cybersecurity tools designed to protect modern networks and data systems in an increasingly complex threat landscape.
$14.02
-$1.88 (-11.82%)
EOD Oct 16, 2026
The business is unprofitable at the operating level (-6636.04% margin). The thesis depends entirely on whether and when it reaches sustainable profitability.
Revenue up 80.9% YoY with margins expanding 6117.9pp.
ROIC dropped from -67.20% to -136.32%, capital efficiency is deteriorating. Negative free cash flow of -$30M. The business is consuming cash, not generating it.
Price History
Valuation & Multiples
Based on TTM earnings · Diluted shares
Profitability & Returns
Revenue (TTM)
$530K
▲ +80.9% YoY
Net Income (TTM)
-$35M
▲ +37.8% YoY
Op. Margin
-6636.04%
▲ +6117.9pp YoY
ROIC
-136.32%
▼ -69.1pp YoY
Cash Flow & Balance Sheet
FCF (TTM)
-$30M
▲ +19.6% YoY
Op. Cash Flow (TTM)
-$30M
▲ +13.4% YoY
Net Debt
-$36M
Net Cash Position
Cash & Equiv.
$37M
3Y CAGR: -58.1%
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Is Arqit Quantum (ARQQ) overvalued?
Arqit Quantum (ARQQ)'s valuation is best read against its own history, its peers, and the growth its price implies. A high multiple is not the same as overvalued: fast-growing, high-quality businesses can deserve a premium. See the general approach in how to tell if a stock is overvalued.
On quality, Arqit Quantum scores 10/100 on Intrinsiqq's quality scorecard (a lower-quality business on these measures), weighing growth, margins, returns on capital, share count, and balance-sheet strength. All figures are computed from company filings; read the full methodology, or see how the market compares in our US profitability statistics. This is analysis, not investment advice.
Frequently asked
Is Arqit Quantum a high-quality business?+
Arqit Quantum scores 10 out of 100 on Intrinsiqq's quality score, a weighted blend of 6 metrics each scored 0 to 100, which makes it a lower-quality business on these measures. Recent fundamentals include a -6,636.0% operating margin and a -136.3% return on invested capital. The score weighs revenue and free-cash-flow growth, operating margins, return on invested capital, share-count change, and balance-sheet strength, all computed from company filings, not opinion. Because valuation only means something relative to quality, the full metric-by-metric breakdown is on the quality scorecard.
Is Arqit Quantum a good stock to buy right now?+
That depends on valuation and quality together, not either alone. you should weigh ARQQ's valuation and scores 10/100 on quality (lower-quality). A cheap price is only a bargain if the business is durable, and a premium can be justified by genuine quality, so the two questions, "is it cheap?" and "is it good?", only make sense side by side. Read the valuation against the quality scorecard, run the DCF on your own assumptions, and decide for yourself. This is analysis from company filings, not investment advice.
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Data sourced from company filings and third-party price providers. Scores, valuations, and metrics are algorithmic estimates. This is not investment advice. See our Terms and Methodology.