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Arqit Quantum Inc.

NASDAQ: ARQQ
17.60
as of 2026-10-29
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Business overview

Arqit Quantum Inc. is a cybersecurity software company that develops encryption platforms, specifically focusing on quantum-safe symmetric key agreement software. The company aims to provide security solutions that are resilient against attacks from both classical and quantum computers.

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Update log

DateNewsImpact
10/30/2026PR Newswire
10/29/2026PR Newswire
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10/24/2026PR Newswire
10/23/2026PR Newswire
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10/20/2026Arqit Quantum Inc. has made a strategic investment in Sirius Computer, Inc. to accelerate the development of quantum-safe communication solutions for defense and intelligence sectors.
10/13/2026S - Sale transaction of -2,573 shares at $16.40
10/8/2026Yahoo Finance
10/6/2026S - Sale transaction of -493 shares at $24.19
10/6/2026S - Sale transaction of -504 shares at $24.19
10/6/2026S - Sale transaction of -555 shares at $24.19
10/6/2026S - Sale transaction of -118 shares at $24.19
10/6/2026S - Sale transaction of -218 shares at $24.19
10/5/2026S - Sale+OE transaction of -127 shares at $23.78
10/5/2026S - Sale+OE transaction of -2,535 shares at $23.78
10/5/2026S - Sale+OE transaction of -533 shares at $23.78
10/5/2026S - Sale+OE transaction of -522 shares at $23.78
10/5/2026S - Sale+OE transaction of -233 shares at $23.78
9/22/2026Babcock International Group successfully demonstrated a secure data transfer using Arqit Quantum Inc.'s quantum-safe encryption technology for defense communications.
9/17/2026The article discusses the necessity of quantum-safe encryption for satellites, which are long-lived assets that need protection against future threats. This reflects Arqit Quantum's core focus on cybersecurity solutions resilient to quantum computer attacks.
9/9/2026
Event outcome: Unknown
event_outcome
Billington CyberSecurity Summit participation — No reliable public evidence was found confirming that Arqit Quantum Inc. participated in the 17th Annual Billington CyberSecurity Summit held on September 8–10, 2026.
9/4/2026
Timing score increases following successful quantum-safe satellite demo
AI review
The increase in the timing score is driven by the 'Catalysts' pillar, which rose from 0 to 75 following the successful demonstration of quantum-safe satellite communications with Es’hailSat and AIEE. This practical application of Arqit's technology serves as a tangible technical milestone that enhances the short-term visibility of product deployment, which was previously nonexistent. There was no change to the underlying financial quality or valuation scores.
9/2/2026Symmatrics, an encryption company, is presenting at the Billington CyberSecurity Summit regarding its quantum-secure trust layer for the AI era.
9/1/2026Arqit Quantum Inc. collaborated with Es’hailSat and AIEE to demonstrate the practical application of quantum-safe encryption in satellite communications.
9/1/2026Yahoo Finance
8/20/2026Lastwall has achieved CMMC Level 2 certification, reinforcing its position in identity security and quantum resilience for the U.S. defense sector.
8/4/2026PR Newswire
6/21/2026Arqit Quantum has settled a four-year legal dispute over alleged misrepresentations regarding its technology and revenue for $7 million.
6/18/2026Arqit Quantum has reached a $7 million settlement to resolve a long-running lawsuit concerning disclosures about its quantum encryption technology.
6/9/2026Arqit Quantum reported fiscal Q1 2026 revenue of $623,000 and an increase in contract volume compared to 2025.