THIS ANNOUNCEMENT CONTAINS INSIDE INFORMATION FOR THE PURPOSES OF THE MARKET ABUSE REGULATION (EU) 596 / 2014 WHICH FORMS PART OF UNITED KINGDOM LAW BY VIRTUE OF THE EUROPEAN UNION (WITHDRAWAL) ACT 2018, AS AMENDED. UPON THE PUBLICATION OF THIS ANNOUNCEMENT, THIS INSIDE INFORMATION IS NOW CONSIDERED TO BE IN THE PUBLIC DOMAIN.

Light Science Technologies Holdings plc

("LSTH", "Light Science", the "Company" or the "Group")

Passive Fire Protection Division Trading Update

£1.28 million to £1.66 million of Orders and Projects

Secured Since Injectaclad Acquisition

Light Science Technologies Holdings plc (AIM: LST), the innovative technology and manufacturing business, is pleased to provide an update on trading within its Passive Fire Protection ("PFP") division following the acquisition of RLUK Injection Ltd ("RLUK"), owner of Injectaclad, the patented fire-resistant barrier system, on 14 April 2026.

The Group currently has two passive fire protection installation projects in progress with a combined contract value of c.£390k to c.£775k depending on the extent of remediation required.

In parallel, the Company continues to make strong progress following the acquisition of RLUK.

As announced on 5 May 2026, the Company secured its first post-acquisition Injectaclad materials supply contract valued at c.£410k for a residential remediation project. The Company has now secured additional Injectaclad material supply orders with a value of c.£475k from approved installation contractors within the Injectaclad network.

Furthermore, delivery of materials for the previously announced Hull project has progressed ahead of schedule, with the balance of the £410k order now expected to be delivered during June rather than over the originally anticipated 19-week project programme.

Accordingly, total Injectaclad material supply orders secured since completion of the acquisition now amount to c.£885k.

Taken together, the installation and materials supply activities represent additional orders and projects with a value of c.£1.28 million to c.£1.66 million secured since the RLUK acquisition completed.

The progress achieved reflects the strategic rationale behind the acquisition, creating a vertically integrated business that combines installation services with the supply of Injectaclad materials through our trusted network of quality-accredited installation contractors. The Group continues to support customers and contractors as projects progress through the Building Safety Regulator approval process and remains encouraged by the level of activity across both the installation pipeline and the Injectaclad installer network.

Simon Deacon, CEO of LSTH, commented: "We are pleased with the progress achieved across our Passive Fire Protection division since completing the RLUK acquisition in April. The growth in installation activity demonstrates the strength of our core business, while the material supply orders secured through the Injectaclad installer network validate the strategic rationale for the acquisition.

"We were also delighted to sponsor and exhibit at The Institution of Fire Engineers (IFE) International President's Conference 2026, experiencing strong engagement from fire engineers across the UK, alongside representatives from the Building Safety Regulator and other key industry stakeholders.

"Securing c.£885k of material supply orders within the first few months of ownership, alongside a growing installation pipeline, provides encouraging evidence that our strategy is gaining traction. We remain focused on supporting our installer network, converting opportunities within the project pipeline and building a scalable, higher-margin business within the PFP division."

For additional information please contact:

Notes to Editors:

About Light Science Technologies Holdings plc (www.lightsciencetechnologiesholdings.com)

Light Science Technologies Holdings plc ("LSTH") operates through three divisions: Passive fire protection ("PFP"); AgTech ("AGT") and contract electronics manufacturing ("CEM"). The Company is involved in the design, manufacturing, and installation of products and customized solutions spanning various industry sectors, with a focus on addressing global challenges related to food security, climate change, and fire protection, the Group is committed to developing robust solutions in these rapidly growing market sectors.

As both an installer and supplier of the fire resistant graphite barrier system Injectaclad, the PFP division is strongly positioned to capture a growing proportion of the fire remediation market as the Buildings Safety Regulator ("BSR") backlog unblocks, enabling accelerated conversion of the Company's strong sales pipeline. The Injectaclad system is a solution for the retrospective installation of cavity fire barriers in buildings using a pumped system, thereby avoiding the need for full-scale façade removal. It addresses a significant problem in the UK's built environment, where thousands of buildings require remediation to meet fire safety standards. For more information please visit Cavity Fire Barrier Remediation System | Injectaclad Ltd

The Group's tailored AgTech solutions encompass control systems, grow lights, sensor technology, venting, and irrigation systems, catering to both UK and global customers. Key markets include indoor, vertical, glasshouses, polytunnels, and more recently wider applications in broadacre farming. Driving factors comprise global food and water shortages, a growing population, government policies promoting sustainable growth methods, heightened scrutiny of food production's impact on climate change, and a shift away from processed foods. Key markets span Eastern Europe, the Americas, Australasia, and select locations in the Middle East, with the Company expanding routes to market via low-cost, low risk distribution agreements globally. For more information please visit: Sustainable grow lights and sensor technology - Light Science Technologies

The CEM division excels in designing, procuring, and manufacturing high-quality electronic products, with a specialisation in Printed Circuit Boards. These products find application across diverse sectors such as audio, automotive, electronics, gas detection, lighting, pest control, telecommunications and AgTech. For more information please visit: Home | UK Circuits

The Group is strongly positioned across a range of high growth sectors with proven technologies and solutions. It is increasingly focused on high margin opportunities that will drive cash generation. Furthermore, it is positioned for accelerated growth, targeting larger contracts and increasing recurring revenues - as both legislation and global issues look set to underpin demand for its products, driving the Company towards sustained profitable growth.