9 July 2025

Plexus Holdings PLC ('Plexus' or 'the Company')

Board Changes

Plexus Holdings PLC, the AIM quoted wellhead services business, is pleased to announce that Dr Stuart Paton has been appointed as a Non-Executive Director of the Company with immediate effect.

Dr Paton brings over 30 years of experience in the energy industry, having held a range of senior positions, including Chief Executive Officer of Dana Petroleum plc and Chair and Non-Executive Director of Getech Group plc. He is a highly experienced company adviser, holds a PhD from the University of Cambridge, and is a Fellow of the Geological Society of London.

The Company also announces that Ms Kunming Liu has stepped down from the Board after 10 years of service. The Board would like to thank Ms Liu for her valuable contributions and wishes her every success in her future endeavours.

Plexus CEO Craig Hendrie said: "We're delighted to welcome Dr Paton to the board. His extensive experience in the energy sector, coupled with a strong track record of guiding UK growth companies in the public markets, will be a valuable asset to Plexus as we continue to scale."

The following disclosures are made pursuant to Schedule 2 paragraph (g) of the AIM Rules. He does not hold any securities issued by the Company.

Dr Stuart Mcnicol Paton, aged 57, holds the following directorships / partnerships:

ENDS

For further information please visit www.plexusplc.com or contact:

NOTES

Plexus Holdings plc (AIM: POS) is an IP-led company specialising in developing and providing wellhead systems and associated products and services for offshore operations.

Headquartered in Aberdeen, the company focuses on providing wellheads for Jack-up rig operations such as exploration and appraisal drilling, Plug & Abandonment work and emerging markets for Carbon Capture & Storage, hydrogen production and storage and geothermal. Plexus has a collaboration agreement with SLB to supply Exact adjustable wellhead systems for Jack-up applications and supports these operations with a range of proprietary equipment and tools, and project engineering services.

Plexus is known for its highly innovative POS-GRIP® wellhead technology and HG® metal-to-metal sealing systems, for which licences have been sold to major industry players such as SLB and TechnipFMC for limited applications. Plexus continues to develop products based on POS-GRIP technology for challenging surface production wellhead platforms, special projects and connector and subsea applications such as the Python® subsea wellhead system.

Plexus has always been at the forefront of innovation to reduce risk and improve performance in the energy industry, such as developing through-BOP wellhead systems which help to prevent blow-outs, and POS-GRIP "HG" Seals which are leak-free throughout field life and so reduce methane emissions and minimise maintenance costs. These innovations support the oil and gas industry's ESG and NetZero, and in recognition of this, Plexus was Awarded the London Stock Exchange's Green Economy Mark in 2021.

For more information visit: https://www.plexusplc.com/