09 September 2025

Quantum Base Holdings plc

("Quantum Base" or the "Company")

Expansion of Key Contract

Quantum Base (AIM: QUBE), the quantum science company focused on creating a new global standard in authentication, is pleased to announce that it has secured a £250,000 expansion of an existing contract with its largest customer - a major international security printer ("Customer #1"). This revenue is due in the current financial year ending 30 April 2026 and is in addition to a previous expansion of £96,000 on the same contract.

Under a framework agreement, Quantum Base enables Customer #1 to market and sell the Company's Q-ID technology to its clients, with the first application of Q-IDs being on tax stamps for a government customer. The amended contract now accounts for additional features and supported devices.

The expanded contract widens the number of smartphones Quantum Base supports, with 170 models now able to scan and identify the authenticity of products through the Company's patented, 100% secure technology. This represents a market leading position, and accounts for >99 per cent of smartphone usage in Quantum Base's target markets.

Tom Taylor, CEO of Quantum Base, commented:

"I am delighted to announce the expansion of our contract with our largest customer - a significant commercial partnership for Quantum Base. When we initially signed the agreement, it represented the first large-scale commercialisation of Q-ID technology. The decision to broaden the programme scope and advance our relationship at this relatively early stage serves as a strong indication of the real-world value that our product is delivering.

"We are trading in-line with expectations for the year and still anticipate signing up a further four commercial contracts by April 2026 with positive steps already made towards the onboarding of several leads. We continue to meet our goals with regards to product development and the strengthening of our team through important hires. Counterfeiting is on the rise globally, and we're experiencing high demand for our world leading innovation. I look forward to updating shareholders with further progress across these areas shortly."

This announcement contains inside information as defined in Article 7 of the EU Market Abuse Regulation No 596/2014, as it forms part of United Kingdom domestic law by virtue of the European Union (Withdrawal) Act 2018, as amended, and has been announced in accordance with the Company's obligations under Article 17 of that Regulation.

ENDS

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About Quantum Base

Quantum Base is a quantum science company creating a new global standard in authentication through its patented Q-ID solution - unbreakable and non-replicable authenticity tags that can be applied to a vast array of products, significantly mitigating counterfeiting.

The technology underpinning Q-IDs harnesses randomness at the atomic level, and this volume and variation ensure that there is virtually an infinite number of combinations that can be created. The Q-ID is practically impossible to replicate using even the most advanced available technology.

Q-IDs can be applied to almost any print line and can be entirely non-intrusive to a product's existing design, meaning that they can be utilised in a vast number of end markets. The authentication process to identify printed tags is undertaken using existing and unmodified smartphone technology, providing easy authentication and proven security for global brands, governments and consumers.