Launch of Retail Offer

596/2014) AS IT FORMS PART OF UNITED KINGDOM DOMESTIC LAW BY VIRTUE OF THE EUROPEAN UNION (WITHDRAWAL) ACT 2018.

Light Science Technologies Holdings plc

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

Proposed Retail Offer

Light Science Technologies Holdings plc (AIM: LST), the innovative technology and manufacturing business providing real-world solutions targeting issues including global food security and fire safety, announces a retail offer via BookBuild (the "Retail Offer") of up to 60,000,000 new ordinary shares ("Ordinary Shares") of 1p each in the capital of the Company (the "Retail Offer Shares") at an issue price of 1 pence per Ordinary Share (the "Issue Price").

In addition to the Retail Offer, the Company is also conducting a placing of new Ordinary Shares at the Issue Price (the "Placing", and together with the Retail Offer, the "Fundraising"). A separate announcement has been made earlier this morning regarding the Placing and its terms. For the avoidance of doubt, the Retail Offer is not part of the Placing, however the Retail Offer is conditional upon completion of the Placing. Further details of the Placing can be found in the announcement made at 7am on 11 March 2026.

The Issue Price represents a discount of approximately 65.5 per cent to the closing share price of 2.9 pence per Ordinary Share on 10 March 2026.

The Retail Offer is conditional, inter alia, upon shareholders approving the Resolutions at the General Meeting to be called by the Company in connection with the Fundraising, and the Retail Offer Shares to be issued pursuant to the Retail Offer being admitted to trading on the AIM market operated by the London Stock Exchange ("Admission"). Subject to the Resolutions being passed at the General Meeting, Admission is expected to take place on 14 April 2026.

The net proceeds of the Fundraising will be utilised (i) to finance the initial consideration for the Injectaclad Acquisition, together with the consideration for the UK Circuits Acquisition and the Property Acquisition, (ii) to finance improvements and conversion works at the Property, (iii) for product development and (iv) to provide working capital for the Enlarged Group to facilitate large contract wins.

Expected Timetable in relation to the Retail Offer

Retail Offer

The Company values the support of its retail shareholder base and believes that it is appropriate to provide its existing retail shareholders in the United Kingdom the opportunity to participate in the Retail Offer. The Company is therefore making the Retail Offer available in the United Kingdom through the financial intermediaries which will be listed, subject to certain access restrictions, on the following website: https://www.bookbuild.live/deals/0762DQ/authorised-intermediaries

Shore Capital Stockbrokers Ltd ("Shore Capital") will be acting as retail offer coordinator in relation to this Retail Offer (the "Retail Offer Coordinator").

The Retail Offer will be open to eligible investors in the United Kingdom at 7.10 am on 11/03/2026. The Retail Offer is expected to close at 4.30 pm on 16/03/2026. Investors should note that financial intermediaries may have earlier closing times. The Retail Offer may close early if it is oversubscribed.

If any intermediary has any questions about how to participate in the Retail Offer on behalf of existing retail shareholders, they should contact BookBuild at email: support@bookbuild.live.

No offering document, prospectus or admission document has been or will be prepared or submitted to be approved by the Financial Conduct Authority (or any other authority) in relation to the Retail Offer, and investors' commitments will be made solely on the basis of the information contained in this announcement and information that has been published by or on behalf of the Company prior to the date of this announcement by notification to a Regulatory Information Service in accordance with the Financial Conduct Authority's Disclosure Guidance and Transparency Rules and the Market Abuse Regulation (EU Regulation No. 596/2014) as it forms part of United Kingdom law by virtue of the European Union (Withdrawal) Act 2018 (as amended).

There is a minimum subscription of £100.00 per investor under the terms of the Retail Offer which is open to investors in the United Kingdom subscribing via the intermediaries which will be listed, subject to certain access restrictions, on the following website: https://www.bookbuild.live/deals/0762DQ/authorised-intermediaries

Capitalised terms used but not defined in this announcement have the meanings given to them in the Company's announcement released at 7am on 11 March 2026 in respect of the Fundraising unless the context provides otherwise.

The Company's LEI is 213800V9MWRRLVQ6EY56.

UK Product Governance Requirements

EU Product Governance Requirements