Directorate change

30 June 2026

MYCELX TECHNOLOGIES CORPORATION

("MYCELX" or the "Company")

Directorate Change

MYCELX Technologies Corporation (AIM: MYX), a leading provider of proprietary water treatment technology to the Oil and Gas and other industries worldwide, today announces that Gareth Kaminski-Cook has informed the Board of his decision to step down as Chair and Director of the Company with effect from 31 July 2026.

Mr. Kaminski- Cook is looking to reduce work commitments and believes that the timing is right, given the Company's growing momentum in the execution of its growth strategy and the significant progress made in strengthening the Group's operational and commercial position.

The Board confirms that Tom Lamb, currently Senior Independent Director of the Company and previously Chair of MYCELX during the period 7 July 2021 to 23 September 2025, will assume the role of Interim Chair from 1 August 2026. Mr Lamb's extensive knowledge of the Company, its markets and stakeholders will provide continuity and stability whilst the Board undertakes a process to find and appoint a permanent Chair.

Gareth Kaminski-Cook, outgoing Chair, commented:

"It has been a privilege to serve as Chair of MYCELX. Together, the Board and management team have worked hard to position the Company for sustainable growth. With strong momentum behind the execution of our strategy and a solid platform for future success, the Company is very well positioned for profitable growth. I would like to thank my fellow Directors, management, employees, customers and shareholders for their support and commitment during my tenure."

Tom Lamb, Interim Chair, commented:

"On behalf of the Board, I would like to thank Gareth for his leadership and commitment to MYCELX. His guidance and consistent support of our strategy throughout a period of strong execution and meaningful progress have set the Company on solid footing for the growth ahead. I look forward to supporting the Board and management team as Interim Chair whilst we conduct a thorough process to appoint a permanent Chair."

The Board would like to express its sincere gratitude to Mr. Kaminski-Cook for his service, leadership and contribution to the Company and wishes him every success for the future.

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