Appointment of Executive Director

30 June 2025

Helios Underwriting plc

('Helios' or 'the Company')

Appointment of Executive Director

Further to its announcement of 29 May 2025, Helios, the only publicly traded company offering instant access to a diverse portfolio of syndicates at Lloyd's of London, is pleased to announce the appointment of Adhiraj Maitra as Director of Finance and Operations and as an Executive Director of the Company with immediate effect.

Further information in accordance with Rule 17 and Schedule Two paragraph (g) of the AIM Rules for Companies is set out below in the Appendix to this announcement.

For further information, please contact:

Helios Underwriting plc

John Chambers - Interim Executive Chairman +44 (0)203 965 6441

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Deutsche Numis (Nomad and Broker)

Giles Rolls / Charles Farquhar +44 (0)20 7601 6100

FTI Consulting

Ed Berry +44 (0)7703 330 199

Nathan Hambrook-Skinner +44 (0)7977 817 092

Christian Harte +44 (0)7974 288 763

About Helios

Helios provides a limited liability direct investment into the Lloyd's insurance market and is quoted on the London Stock Exchange's AIM market (ticker: HUW). Helios trades within the Lloyd's insurance market. The portfolio provides a broad spread of business primarily participating in the US and other international wholesale and reinsurance markets. For further information please visit www.huwplc.com

Appendix - AIM Rule 17

Regulatory disclosures in accordance with Rule 17 and Schedule Two paragraph (g) of the AIM Rules for Companies.

Adhiraj Maitra, aged 42, does not hold and has not held within the last 5 years, any directorships or partnerships. Adhiraj currently holds 37,100 ordinary shares in Helios, representing 0.0475% of the current issued share capital. He also holds 217,985 nil cost options, as part of his Long-Term Incentive Plans.

There are no further disclosures to be made in relation to Adhiraj Maitra in accordance with Schedule Two paragraph (g) of the AIM Rules for Companies.