Dashed lines mark market-closed periods (overnight, weekends & holidays)
About Arqit Quantum
Arqit Quantum (ARQQ) has a market cap of $323.66M as of September 2026 — #12 of the 13 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.
Sector
Technology
Industry
Software - Infrastructure
Employees
87
Founded
2017
Headquarters
London, UK
Shares Outstanding
16.6M
Quantum Division
https://arqitgroup.com/products/ska-platform
Quantum Technology
Cloud Access
Roadmap Target
Global enterprise and telco rollout via SKA-CC for MSPs and sovereign private deployments
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 and operating cash flow are further updated from its 6-K for the six months ended March 31, 2026 (no 10-Q exists to bridge automatically for 20-F filers).
Cash Position & Runway
Total Cashⓘ
$28.86M
TTM Cash Burnⓘ
$42.74M
per year (TTM)
Cash Runwayⓘ
8 mo
Total Debtⓘ
$0.00
Quarterly Operating Cash Flow
Red bars = cash burn (negative operating CF). Green = cash-flow positive. Source: SEC EDGAR 10-Q filings.
Financial Metrics (Annual)
Total Revenueⓘ
$530.00K
Revenue Growth (YoY)ⓘ
+80.9%
Gross Marginsⓘ
—
Operating Marginsⓘ
-7271.51%
Net Marginsⓘ
-6668.49%
Total Debtⓘ
$0.00
P/E Ratio (TTM)ⓘ
—
EPS (TTM)ⓘ
$-10.7869
Price / Bookⓘ
20.26
Earnings Per Share (TTM)
EPS (TTM)ⓘ
$-10.7869
Unprofitable
P/E Ratioⓘ
—
Price / Bookⓘ
20.26
Price-to-Book
Returns vs S&P 500
1Y
3Y
5Y
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.
Strike Price
$11.50
Outstanding
6.1M
via AI summary
Dilution Ceiling
$69.71M
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)
Latest Short Vol %
45.7%
2026-09-16
Short Volume
78,768
| Date | Short Vol | Total Vol | Short % |
|---|---|---|---|
| 2026-09-16 | 78,768 | 172,479 | 45.7% |
| 2026-09-09 | 75,977 | 110,092 | 69% |
| 2026-09-04 | 54,050 | 70,071 | 77.1% |
| 2026-09-02 | 92,938 | 133,894 | 69.4% |
| 2026-08-28 | 45,142 | 102,583 | 44% |
| 2026-08-26 | 38,212 | 65,602 | 58.2% |
| 2026-08-21 | 90,390 | 135,712 | 66.6% |
| 2026-08-19 | 91,093 | 149,513 | 60.9% |
| 2026-08-12 | 58,492 | 132,131 | 44.3% |
| 2026-08-06 | 54,287 | 76,025 | 71.4% |
Source: FINRA CNMS · Not the same as total short interest (outstanding positions) · Updated daily
Recent Research Papers (arXiv)
arXiv ↗Source: arXiv.org API · Papers mentioning company name · Updated every 48 hours
StockTwits Sentiment
Source: StockTwits · last 30 messages · updated every 4h
Recent News
Press Releases
GlobeNewswire ↗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.
SEC Filings & Earnings Reports
View annual, quarterly, and material-event filings on SEC EDGAR
No annual summaries available yet.
Summaries are generated automatically. Check back after the next scheduled update.
10-K · 10-Q · 20-F · 40-F · 6-K filings
All Filings ↗| Date Filed | Form | Period Covered | |
|---|---|---|---|
| 2026-09-09 | 6-K | 2026-09-09 | EDGAR ↗ |
| 2026-08-19 | 6-K | 2026-08-19 | EDGAR ↗ |
| 2026-06-17 | 6-K | 2026-06-17 | EDGAR ↗ |
| 2026-05-21 | 6-K | 2026-03-31 | EDGAR ↗ |
| 2026-05-01 | 6-K | 2026-05-01 | EDGAR ↗ |
| 2026-04-13 | 6-K | 2026-04-13 | EDGAR ↗ |
| 2026-03-04 | 6-K | 2026-03-04 | EDGAR ↗ |
| 2026-01-12 | 6-K | 2026-01-12 | EDGAR ↗ |
| 2025-12-09 | 6-K | 2025-12-09 | EDGAR ↗ |
| 2025-12-09 | 20-F | 2025-09-30 | EDGAR ↗ |
| 2025-10-21 | 6-K | 2025-10-21 | EDGAR ↗ |
| 2025-10-09 | 6-K | 2025-10-09 | EDGAR ↗ |
| 2025-09-15 | 6-K | 2025-09-15 | EDGAR ↗ |
| 2025-09-11 | 6-K | 2025-09-11 | EDGAR ↗ |
| 2025-08-28 | 6-K | 2025-08-28 | EDGAR ↗ |
| 2025-05-22 | 6-K | 2025-03-31 | EDGAR ↗ |
| 2025-04-04 | 6-K | 2025-04-04 | EDGAR ↗ |
| 2024-12-19 | 6-K | 2024-12-19 | EDGAR ↗ |
| 2024-12-09 | 6-K | 2024-12-09 | EDGAR ↗ |
| 2024-12-05 | 20-F | 2024-09-30 | EDGAR ↗ |
| 2024-12-05 | 6-K | 2024-12-05 | EDGAR ↗ |
| 2024-12-03 | 6-K | 2024-12-03 | EDGAR ↗ |
| 2024-10-11 | 6-K | 2024-10-11 | EDGAR ↗ |
| 2024-10-01 | 6-K | 2024-10-01 | EDGAR ↗ |
| 2024-09-27 | 6-K | 2024-09-27 | EDGAR ↗ |
| 2024-09-19 | 6-K | 2024-09-19 | EDGAR ↗ |
| 2024-08-27 | 6-K | 2024-08-27 | EDGAR ↗ |
| 2024-05-20 | 6-K | 2024-03-31 | EDGAR ↗ |
| 2024-04-15 | 6-K | 2024-04-15 | EDGAR ↗ |
| 2023-11-21 | 20-F | 2023-09-30 | EDGAR ↗ |
| 2023-11-21 | 6-K | 2023-11-21 | EDGAR ↗ |
| 2023-10-23 | 6-K | 2023-10-23 | EDGAR ↗ |
| 2023-09-11 | 6-K | 2023-09-11 | EDGAR ↗ |
| 2023-09-07 | 6-K | 2023-09-07 | EDGAR ↗ |
| 2023-09-07 | 6-K | 2023-09-07 | EDGAR ↗ |
| 2023-08-08 | 6-K | 2023-08-08 | EDGAR ↗ |
| 2023-06-02 | 6-K | 2023-06-02 | EDGAR ↗ |
| 2023-05-17 | 6-K | 2023-05-17 | EDGAR ↗ |
| 2023-02-21 | 6-K | 2023-02-21 | EDGAR ↗ |
| 2022-12-14 | 6-K | 2022-12-14 | EDGAR ↗ |
Source: SEC EDGAR · Annual: 10-K / 20-F / 40-F · Quarterly: 10-Q / 6-K · AI summaries generated automatically
Earnings releases, contracts, leadership changes, offerings
All 8-Ks ↗No 8-K filings indexed yet.
Source: SEC EDGAR · Material events, earnings releases, contract announcements · Updated weekly
S-3 shelf registrations, 424B prospectuses, and document-verified foreign-issuer supplements represent potential dilution events. Arqit Quantum has 26 such filings on record.
All Shelf Filings ↗Source: SEC EDGAR · S-3 = shelf registration, 424B3/B5 = active offering (dilutive)
SC 13G/D filers · >5% ownership
All 13G/D ↗| Institution | Form | % Owned | Filed |
|---|---|---|---|
| SC 13G | 9.65% | 2024-01-26 | |
| SC 13D/A | 108.30% | 2024-12-18 | |
| SC 13G | 3.74% | 2024-10-01 | |
| SC 13G/A | 2.75% | 2024-11-14 | |
| SC 13D/A | 0.07% | 2024-02-13 |
Source: SEC EDGAR SC 13G/D · Updated monthly
Open-market buys and sells by directors and officers
All Form 4s ↗90-Day Activity
| Filed | Insider | Type | Shares | Price |
|---|---|---|---|---|
| 2026-07-21 | ▲ BUY | 841 | — | |
| 2026-07-21 | ▲ BUY | 673 | — | |
| 2026-07-21 | ▲ BUY | 757 | — | |
| 2026-07-06 | ▼ SELL | 1,834 | $25.20 | |
| 2026-07-06 | ▲ BUY | 965 | — | |
| 2026-07-06 | ▲ BUY | 472 | — | |
| 2026-07-06 | ▲ BUY | 119 | — | |
| 2026-07-06 | ▲ BUY | 1,666 | — | |
| 2026-07-02 | ▼ SELL | 4,000 | $29.48 | |
| 2026-06-24 | ▼ SELL | 8,288 | $21.42 | |
| 2026-06-24 | ▲ BUY | 15,000 | — | |
| 2026-06-05 | ▲ BUY | 73,562 | $2.50 | |
| 2026-06-05 | ▲ BUY | 120,000 | $2.50 | |
| 2026-05-20 | ▼ SELL | 435 | $15.87 | |
| 2026-05-20 | ▲ BUY | 3,066 | $0.0025 | |
| 2026-05-08 | ▲ BUY | 1,698 | — | |
| 2026-05-08 | ▲ BUY | 1,082 | — | |
| 2026-05-08 | ▲ BUY | 1,509 | — | |
| 2026-05-08 | ▲ BUY | 1,887 | — | |
| 2026-04-07 | ▼ SELL | 7,595 | $13.51 | |
| 2026-04-03 | ▲ BUY | 15,625 | — | |
| 2026-04-03 | ▼ SELL | 1,790 | $13.32 | |
| 2026-04-03 | ▲ BUY | 916 | — | |
| 2026-04-03 | ▲ BUY | 448 | — | |
| 2026-04-03 | ▲ BUY | 116 | — | |
| 2026-04-03 | ▲ BUY | 2,083 | — | |
| 2026-04-03 | ▼ SELL | 683 | $13.31 | |
| 2026-04-03 | ▲ BUY | 500 | — | |
| 2026-04-03 | ▲ BUY | 833 | — | |
| 2026-04-03 | ▼ SELL | 512 | $13.25 |
Source: SEC EDGAR Form 4 · Open-market buys and sells · Updated daily
Bull vs Bear: Analyst Opinions on Arqit Quantum (ARQQ)
Generated from live analyst targets, SEC filings and market data as of September 2026 — not investment advice.
▲ THE BULL CASE
• Revenue grew 81% year-over-year to $530.00K (latest fiscal year).
• Retail sentiment on StockTwits runs 100% bullish over the last 9 scored posts.
▼ THE BEAR CASE
• Only about 8 months of cash runway at the current burn rate — a capital raise (and dilution) is likely within the year.
• 26 at-the-market / shelf offering filings (S-3 / 424B / SUPPL) on record — an active dilution channel.
• Not yet profitable: net loss of $35.34M in the latest fiscal year.
• The stock is down 48% over the past year.
How long is Arqit Quantum's (ARQQ) cash runway?
Arqit Quantum has roughly 8 months of cash runway as of September 2026 — $28.86M in cash divided by its trailing-twelve-month operating burn.
Is ARQQ stock at risk of shareholder dilution?
Dilution risk is elevated: 26 shelf/ATM offering filings on record, only ~8 months of cash runway.
What percentage of ARQQ's trading volume is short?
45.7% of ARQQ's daily trading volume was short selling as of 2026-09-16 (FINRA daily short volume).