AIM Rule 17 and Schedule 2(g).

18 May 2026

Shearwater Group PLC

("Shearwater", the "Company" or the "Group")

AIM Rule 17 and Schedule 2(g)

Shearwater Group plc, the cybersecurity, advisory and managed security services group, announces the following update in relation to directors' disclosure for Robin Southwell, Non-Executive Chair of the Company, pursuant to AIM Rule 17 and Schedule 2(g) of the AIM Rules for Companies.

Aeralis Ltd., a company of which Robin Southwell is Chair, announced on 15 May 2026 that administrators had been appointed to the company.

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About Shearwater Group plc

Shearwater Group plc is an award-winning group providing cyber security, managed security and professional advisory solutions to create a safer online environment for organisations and their end users.

The Group's differentiated full service offering spans identity and access management and data security, cybersecurity solutions and managed security services, and security governance, risk and compliance. Its growth strategy is focused on building a scalable group that caters to the entire spectrum of cyber security and managed security needs, through a focused buy and build approach.

The Group is headquartered in the UK, serving customers globally across a broad spectrum of industries.

Shearwater shares are listed on the London Stock Exchange's AIM under the ticker "SWG".  For more information, please visit www.shearwatergroup.com.