About Arqit Quantum

Arqit Quantum (ARQQ) has a market cap of $241.37M as of November 2026 — #12 of the 12 pure-play quantum computing stocks by market value.

Arqit provides quantum-safe encryption-as-a-service via its SKA-Platform, delivering symmetric key agreements resistant to both current and future quantum computer attacks, protecting governments and enterprises.

Quantum Technology

Arqit is a software-only company — SKA-Platform delivers quantum-safe symmetric key agreement (SKA) encryption using fully classical hardware. No quantum computing hardware. NIST ML-KEM compliant. Supports network layers 1–7 (optical, Ethernet, IPsec VPN, API). Latest product: SKA Central Controller (SKA-CC, Nov 2025) for managed service providers and telcos. 2026 integrations: 6WIND virtual router quantum-safe VPN, Intel TEE confidential computing, RAD carrier-edge platform. Fully satellite-free since Dec 2022.

⚠ manual backfill

Arqit's FY2025 20-F (Sept 2025 fiscal year end) was not XBRL-tagged by EDGAR, so revenue and net income are manually backfilled from its FY2025 results press release. Cash of approximately $51 million at September 30, 2026 comes from its preliminary FY2026 results release and 6-K (October 8, 2026); operating cash flow remains on the FY2025 annual basis with the six-month 6-K bridge, as FY2026 cash flow has not yet been reported (no 10-Q exists to bridge automatically for 20-F filers).

Cash Position & Runway

Quarterly Operating Cash Flow

Red bars = cash burn (negative operating CF). Green = cash-flow positive. Source: SEC EDGAR 10-Q filings.

Earnings Per Share (TTM)

Returns vs S&P 500

Source: price_history vs SPY · Periods where price history is unavailable are hidden

Shares Outstanding History

Source: SEC EDGAR XBRL · 10-K and 10-Q filings · Rising trend = dilution

SPAC Warrant Overhang

Arqit Quantum went public via SPAC merger with Centricus Acquisition Corp (2021-09). SPAC warrants allow holders to buy shares at the strike price — exercising them creates new shares and dilutes existing holders.

Dilution ceiling = outstanding warrants × strike price. Outstanding count changes as warrants are exercised or expire — sourced from latest SEC 10-K/20-F.

Daily Short Volume (FINRA)

Source: FINRA CNMS · Not the same as total short interest (outstanding positions) · Updated daily

Source: arXiv.org API · Papers mentioning company name · Updated every 48 hours

StockTwits Sentiment

Source: StockTwits · last 30 messages · updated every 4h

Recent News

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Arqit Quantum Unveils Strategic Investment in Sirius Computer

MT Newswires · Oct 20, 2026

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Arqit announces strategic investment in Sirius to strengthen quantum-safe communications for defence and government

GlobeNewswire · Oct 20

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Arqit Quantum Inc. Announces Select Preliminary Financial Results for the Second Half and Full Fiscal Year 2026

GlobeNewswire · Oct 8

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Today's Stolen Data Could Be Tomorrow's Decrypted Data

CNW Group · Sep 25

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Babcock and Arqit demonstrate secure communications network designed to counter future quantum-enabled threats

GlobeNewswire · Sep 22

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Satellites Built Today Must Outlive the Encryption Protecting Them

CNW Group · Sep 17

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Arqit, Es’hailSat and AIEE Demonstrate Quantum-Safe Satellite Security

GlobeNewswire · Sep 1

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Quantum Computing Is Raising the Stakes for Cybersecurity: 5 Stocks to Watch

MarketBeat · Aug 26

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The Zacks Analyst Blog Highlights Quantinuum, IonQ, NVIDIA, IBM, QTUM, ARQQ, WQTM and CHPX

Zacks · Aug 12

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The Next AI Surge: Top Quantum ETFs to Buy Amid Washington's Funding Push

Zacks · Aug 11

Source: Company newsroom (direct) + wire services (GlobeNewswire, PR Newswire) via Finnhub

News Mention Volume (30 days)

Articles indexed every 4h · Sentiment scored via Loughran-McDonald financial word lists (bullish/bearish keyword frequency). Not ML-based — scores reflect word presence only and may not capture context or sarcasm.