17 June 2026

HELICAL PLC

("Helical" or the "Company")

Annual Report and Accounts and Notice of Annual General Meeting

Following the release on 22 May 2026 of the Company's Annual Results for the year ended 31 March 2026 ("2026 Results Announcement"), the Company announces that it has published its Annual Report and Accounts for the year ended 31 March 2026 ("2026 Annual Report").

The Company also announces that its 2026 Annual General Meeting ("2026 AGM") will be held at 9:00 a.m. on Thursday 16 July 2026 at the Company's registered office located at 22 Ganton Street, London W1F 7FD.

Copies of the 2026 Annual Report and Notice of the 2026 AGM are available to view on the Company's website at www.helical.co.uk. Pursuant to UK Listing Rule 6.4.1R and 6.4.3R, copies of these documents have been submitted to the National Storage Mechanism and will shortly be available for inspection at:  https://data.fca.org.uk/#/nsm/nationalstoragemechanism.

Printed copies of the 2026 Annual Report and Notice of 2026 AGM and associated documents have been mailed to those shareholders who have elected to receive paper communications.

Proposed return of capital

As noted in the 2026 Results Announcement, the Company is proposing to return approximately £12 million to Shareholders by way of a B Share Scheme followed by a share consolidation to maintain share price comparability, if approved by Shareholders at a general meeting of the Company. Further details, including the notice of general meeting of the Company expected to be held on 16 July 2026 immediately after the 2026 AGM, will be set out in a circular expected to be sent to Shareholders later this month.