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

LONDON, Oct. 20, 2026 (GLOBE NEWSWIRE) -- Arqit Quantum Inc. (NASDAQ: ARQQ), a global leader in quantum-safe encryption helping safeguard sensitive information from current and future cyber threats, today announced a strategic investment in Sirius Computer, Inc., a technology provider of secure computing and networking solutions for defence, intelligence and critical national infrastructure. This will accelerate the development and delivery of quantum-safe communications for defence, government and national security users.

GlobeNewsWire • Oct 20, 2026

Arqit Quantum: Due To Lower-Than-Expected Results, I Must Downgrade My Rating

Arqit Quantum Inc. is downgraded to 'sell' due to disappointing FY26 results and persistent operational risks. ARQQ's FY26 revenue reached $975k–$1M, missing guidance and showing sequential declines in H2, raising concerns about growth reliability. With a 247x sales multiple, high stock-based compensation, and a shrinking customer base, ARQQ's valuation appears excessive and vulnerable.

Seeking Alpha • Oct 14, 2026

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

LONDON, Oct. 08, 2026 (GLOBE NEWSWIRE) -- Arqit Quantum Inc. (Nasdaq: ARQQ) (“Arqit”), a global leader in quantum-safe encryption, announces select preliminary financial results for the second half and full fiscal year 2026. Based on preliminary unaudited results, management expects revenue for the second half period ended 30 September 2026 of approximately $355,000 to $380,000.

GlobeNewsWire • Oct 8, 2026

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

LONDON, Sept. 22, 2026 (GLOBE NEWSWIRE) -- Babcock International Group (Babcock), the defence company, has demonstrated its systems integration expertise by securely transferring scenario data using advanced encryption technology from Arqit Quantum Inc, a global leader in quantum-safe encryption, helping safeguard sensitive information from future cyber threats.

GlobeNewsWire • Sep 22, 2026

Stock Picks From Seeking Alpha's August 2026 New Analysts

In August, we welcomed 25 new analysts to Seeking Alpha. This article showcases their stock picks and investment strategies. Analysts provided ratings from Strong Sell to Strong Buy, with detailed justifications based on market trends, company fundamentals, and sector-specific challenges. Key investment theses include bullish views on CTO Realty, Allogene Therapeutics, NanoXplore, Modine, and 3i Group.

Seeking Alpha • Sep 8, 2026

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

LONDON and DOHA, Sept. 01, 2026 (GLOBE NEWSWIRE) -- Arqit Quantum Inc. (NASDAQ: ARQQ, ARQQW), a global leader in quantum-safe encryption, Es'hailSat - the Qatar Satellite Company - a world-class satellite operator and service provider with coverage spanning the MENA region - and Advanced International Electronic Equipment Company (AIEE), a specialist systems integrator for secure communications infrastructure, today announced the successful demonstration of quantum-safe security across operational satellite communications infrastructure.

GlobeNewsWire • Sep 1, 2026

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

In the near future, the mathematical horizon where quantum computing could break all traditional encryption is transitioning from a theoretical debate into a real corporate compliance deadline. Quantum advances are narrowing some estimates of the resources required to threaten current cryptographic systems, potentially bringing that risk closer than many sectors and market participants expected.

MarketBeat • Aug 26, 2026

nLighten and Arqit prove you can use the public cloud without giving up sovereignty

LONDON and AMSTERDAM, July 14, 2026 (GLOBE NEWSWIRE) -- nLighten, a European edge data centre platform, and Arqit Quantum Inc. (NASDAQ: ARQQ, ARQQW) a global leader in PQC migration and quantum-safe encryption, today announced the successful completion of a joint proof of concept (POC), demonstrating how organisations can use public cloud services while maintaining control over sensitive data and cryptographic assets. For customers, the benefit is simple: they no longer have to choose between innovation and control.

GlobeNewsWire • Jul 14, 2026

Arqit Quantum: I See A Turnaround In The Books (Rating Upgrade)

I am upgrading Arqit Quantum Inc. from Sell to Buy after what I see as tangible proof of scale and a major Tier-1 commercial deployment. ARQQ delivered 829% year over year revenue growth in H1 FY26, with contract wins accelerating and a shift toward multi-year recurring telecom and government deals. Sparkle's commercial launch of Quantum-Safe Interconnect across 20 Equinix data centers validates ARQQ's technology and moves it from PoC to commercial availability.

Seeking Alpha • May 26, 2026

Arqit Quantum H1 Earnings Call Highlights

Arqit Quantum NASDAQ: ARQQ reported higher first-half fiscal 2026 revenue and said it is seeing increased commercial activity as governments, telecom operators and defense-related customers evaluate post-quantum cybersecurity needs.

MarketBeat • May 21, 2026