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REG — Helical PLC — Completion of Share Buyback Programme

For best results when printing this announcement, please click on link below: RNS Number: 1703W Helical PLC 24 September 2026 24 September 2026 HELICAL PLC ("Helical", or the "Company") Transaction in Own Shares and Completion of Share Buyback Programme HELICAL PLC ("Helical", or the "Company") announces it has purchased the following number of its Ordinary shares of 1.05p each through Peel Hunt LLP. Date of purchase 21 September 2026 - 23 September 2026 Number of ordinary shares purchased: 65,949 Lowest price per share (pence): 185.00 Highest price per share (pence): 190.00 Weighted average price per day (pence): 187.73 The Company intends to hold the purchased shares in treasury. The table below contains detailed information about the purchases made as part of the buyback programme (the "Programme") which was announced by the Company on 08 June 2026 (the "Buyback Announcement"). Aggregate information: Venue Volume Weighted Average Price (p) Aggregated Volume Lowest price paid per share (p) Highest price paid per share (p) XLON 187.73 65,949 185.00 190.00 Schedule of Purchases - Individual Transactions In accordance with Article 5(1)(b) of the Market Abuse Regulation (EU) No 596/2

HLCL.L

05p each through Peel Hunt LLP. 73 The Company intends to hold the purchased shares in treasury. The table below contains detailed information about the purchases made as part of the buyback programme (the "Programme") which was announced by the Company on 08 June 2026 (the "Buyback Announcement"). 00 XLON 23-09-2026 14:25:58 00199681353TRLO1 These purchases successfully complete the Programme.

0 million. Following the purchase of these shares, the company holds 2,422,560 of its ordinary shares in treasury and has 117,481,200 Ordinary shares in issue. The figure of 115,058,640 may be used by shareholders as the denominator for calculating whether they are required to notify their interest in, or a change to their interest in, the Company under the FCA's Disclosure Guidance and Transparency Rules. com Dido Laurimore Tel: 020 3727 1000 Richard Gotla Andrew Davis This information is provided by RNS, the news service of the London Stock Exchange.

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