Contract expansion

This is a Reach (i.e. non-regulatory) announcement and the information contained is not considered to be material or to have a significant impact on management's expectations of the Company's performance.

14 September 2026

Acuity RM Group plc

("Acuity", or the "Group")

Contract expansion with supplier to the nuclear industry

Acuity RM Group plc (AIM: ACRM), the software group specialising in cyber-security, which supplies its award-winning STREAM® software platform for the Governance, Risk and Compliance ("GRC") market, and associated consultancy services, announces that an existing customer, a major supplier to the nuclear industry, has expanded its engagement with the Group through an additional services agreement.

While the value of the order is modest, the additional services will support the customer's third party risk management activities, extending work already delivered as part of the customer's use of STREAM®.

The agreement is the latest in a series of expansions by established customers of the Group, under which existing users of STREAM® have increased the scope of the software and services they receive from Acuity. The Board regards the continued expansion of existing customer relationships as an indicator of the value customers derive from the platform and the Group's consultancy team.

Third party risk management has become a growing component of organisations' wider cyber-security and resilience programmes. A number of recent high-profile incidents affecting UK businesses, including the attack on Jaguar Land Rover, have been reported to have involved the compromise of suppliers, service providers or other third parties rather than the affected organisation's own systems directly. Organisations operating in regulated and safety-critical sectors, including the nuclear supply chain, are consequently subject to increasing scrutiny of the controls they apply to their own suppliers.

David Rajakovich, Chief Executive of Acuity, commented:

"Customers rarely buy everything on day one. They typically start with a defined problem, and when it is solved properly, they come back with the next issue that needs resolving - and this agreement follows that exact pattern. What has changed is where the next problem tends to sit. Boards in the nuclear supply chain are now being asked not just how secure they are, but how secure their suppliers are, and they need evidence rather than assurances. That is a question STREAM® was built to answer, and it is opening conversations for us in sectors where the standard of proof is high."

For further information please contact:

Acuity RM Group plc                                                                                https://www.acuityrmgroup.com

David Rajakovich CEO / Duncan Harper Finance Director

AlbR Capital (Joint broker)

Lucy Williams / Duncan Vasey                                                                   +44 (0) 20 7469 0936

Clear Capital (Joint broker)

Bob Roberts                                                                                                +44 (0) 20 3869 6080

Note to Editors

Acuity RM Group plc

Acuity RM Group plc (AIM: ACRM), is an established provider of risk management services for cyber-security applications. Its STREAM® software platform collects and analyses data to manage risks and improve business decisions. It is used by a wide range of clients operating in markets including government, defence, broadcasting, utilities, manufacturing and healthcare.

The Company is focused on delivering long term, sustainable growth in shareholder value from organic growth and complementary acquisitions. Information on all the company's products is available on https://www.acuityrmgroup.com