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Arqit Quantum Inc. (ARQQ)

Arqit Quantum Inc. at a glance — key fundamentals, SEC filings, insider buying and selling, and earnings dates.

Arqit Quantum Inc. (ARQQ) is a Software - Infrastructure company based in GB with a market capitalization of $260M. Revenue grew 80.9% year-over-year and free cash flow was negative at -$29.6M. This page tracks ARQQ's SEC filings, insider buying and selling, earnings dates, and key fundamentals in one place.

GB · 82 employees · IPO Apr 1, 2021

Valuation

Valuation & price

$16.19 · as of May 26, 2026 · -72.2% vs 52w high

—

P/E ratio

Latest-FY diluted EPS

9.55

P/B ratio

Market cap ÷ book equity

—

Dividend yield

Price — last 12 months

$58.27$35.09$11.90Jul 25Dec 25Jun 26Jul 7, 25$35.94Jul 9, 25$40.73Jul 11, 25$34.68Jul 15, 25$37.94Jul 17, 25$42.10Jul 21, 25$41.40Jul 23, 25$40.53Jul 25, 25$38.33Jul 29, 25$34.01Jul 31, 25$33.24Aug 4, 25$35.29Aug 6, 25$34.74Aug 8, 25$32.33Aug 12, 25$34.13Aug 14, 25$32.46Aug 18, 25$32.51Aug 20, 25$29.33Aug 22, 25$30.81Aug 26, 25$31.57Aug 28, 25$31.89Sep 3, 25$27.77Sep 5, 25$27.85Sep 9, 25$28.12Sep 11, 25$30.26Sep 15, 25$33.16Sep 17, 25$35.42Sep 19, 25$41.73Sep 23, 25$40.59Sep 25, 25$38.45Sep 29, 25$35.30Oct 1, 25$41.20Oct 3, 25$49.92Oct 7, 25$55.23Oct 9, 25$53.88Oct 13, 25$58.27Oct 15, 25$53.47Oct 17, 25$41.49Oct 21, 25$38.55Oct 23, 25$39.03Oct 27, 25$47.04Oct 30, 25$42.39Nov 3, 25$40.73Nov 5, 25$34.25Nov 7, 25$33.84Nov 11, 25$31.41Nov 13, 25$27.53Nov 17, 25$25.96Nov 19, 25$27.16Nov 21, 25$24.37Nov 25, 25$25.74Nov 28, 25$28.51Dec 2, 25$27.58Dec 4, 25$31.50Dec 8, 25$29.63Dec 10, 25$28.97Dec 12, 25$28.35Dec 16, 25$24.73Dec 18, 25$23.93Dec 22, 25$26.49Dec 24, 25$25.29Dec 29, 25$21.72Jan 2, 26$24.54Jan 6, 26$27.63Jan 8, 26$27.28Jan 12, 26$26.60Jan 14, 26$26.61Jan 16, 26$26.60Jan 21, 26$24.96Jan 23, 26$24.20Jan 27, 26$23.31Jan 29, 26$22.27Feb 2, 26$20.17Feb 4, 26$18.32Feb 6, 26$18.59Feb 10, 26$17.56Feb 12, 26$16.78Feb 17, 26$16.53Feb 19, 26$16.81Feb 23, 26$15.31Feb 25, 26$16.84Mar 2, 26$16.86Mar 4, 26$16.66Mar 6, 26$15.41Mar 10, 26$15.09Mar 12, 26$14.05Mar 16, 26$14.00Mar 18, 26$13.63Mar 20, 26$13.60Mar 24, 26$13.57Mar 26, 26$12.77Mar 30, 26$11.90Apr 1, 26$13.59Apr 6, 26$13.32Apr 8, 26$12.86Apr 10, 26$12.53Apr 14, 26$13.97Apr 16, 26$15.77Apr 20, 26$16.15Apr 22, 26$15.76Apr 24, 26$14.53Apr 28, 26$14.09May 1, 26$14.52May 5, 26$14.65May 7, 26$15.43May 11, 26$15.00May 13, 26$13.83May 15, 26$13.34May 19, 26$12.17May 21, 26$16.45May 26, 26$16.59May 28, 26$16.91Jun 1, 26$16.96Jun 3, 26$14.64Jun 5, 26$12.14Jun 9, 26$12.49Jun 11, 26$13.69Jun 15, 26$17.92Jun 17, 26$22.60Jun 22, 26$21.42Jun 26, 26$24.26
$11.7852-week range$58.27
Loading valuation history…

Fundamentals

Key fundamentals

$260M

Market cap

80.9%

Revenue growth (YoY)

-43.4%

Gross margin

-$29.6M

Free cash flow (USD)

-$36.3M

Net debt

Net cash position

172.5%

Share dilution

1/5

Graham criteria passed

Defensive-investor screen

Technology

Sector

Trajectory

Long-term trends

Revenue by year

2019 → 2025

FY 2019$0.00FY 2020$0.00FY 2021$47.9KFY 2022$7.2MFY 2023$640.0KFY 2024$293.0KFY 2025$530.0K
$0$530K

Free cash flow by year

2019 → 2025

FY 2019$209.4KFY 2020$-5.9MFY 2021$-33.3MFY 2022$-51.3MFY 2023$-48.9MFY 2024$-37.5MFY 2025$-29.6M
$209.4K-$29.6M

Gross margin by year

2021 → 2025

FY 2021-290.1%FY 202282.1%FY 2023-257.7%FY 2024-543.0%FY 2025-43.4%
-290.1%-43.4%

Value screen

Graham defensive-investor tests

Computing the scorecard — refreshing any stale inputs…

0

Insider buys · 90 days

4

Insider sells · 90 days

Earnings

Last reported: May 21, 2026 (EPS $-1.99)

Next expected: not yet scheduled

On the tape

Recent SEC & insider activity

  • Insider sellInsider Sell $118KWillcocks Patrick · General Counsel · $117.9KJul 2, 2026Filing
  • Insider sellInsider Sell $178KBers Jennifer · Chief Revenue Officer · $177.5KJun 24, 2026Filing
  • 6-K filingSettlement Agreement ApprovedJun 17, 2026Filing
  • Annual reportAnnual Report FiledMay 21, 2026Filing
  • Insider sellInsider Sell $7KPointon Nicholas · Chief Financial Officer · $6.9KMay 20, 2026Filing
  • 6-K filingManagement ChangeMay 1, 2026Filing
  • Annual reportAnnual Report FiledApr 13, 2026Filing
  • Insider sellInsider Sell $103KLeaver Andrew · Chief Executive Officer · $102.6KApr 7, 2026Filing
  • Insider sellInsider Sell $24KWillcocks Patrick · General Counsel · $23.8KApr 3, 2026Filing
  • Insider sellInsider Sell $9KWilder Ben Simon · Chief Operating Officer · $9.1KApr 3, 2026Filing

Questions

Frequently asked questions

What is Arqit Quantum Inc.'s market cap?

Arqit Quantum Inc. (ARQQ) has a market capitalization of $260M.

What is ARQQ's P/E ratio?

A meaningful P/E ratio is not available for ARQQ — the company's latest fiscal-year earnings per share is zero, negative, or not yet cached.

What is ARQQ's price-to-book (P/B) ratio?

ARQQ trades at 9.55 times book value per share.

When did Arqit Quantum Inc. last report earnings?

ARQQ last reported earnings on May 21, 2026; the next date is not yet scheduled.

Are insiders buying ARQQ stock?

SEC Form 4 filings show no open-market insider buys at Arqit Quantum Inc. in the last 90 days (4 sells).

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Timeline

Every filing, insider trade & earnings on a price-anchored timeline

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News

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Data: SEC EDGAR filings and cached fundamental data; prices and ratios use the most recent cached quote and statements (may lag by up to a day). Educational and research purposes only. Not investment advice.