Result of Secondary Share Sale.

NOT FOR RELEASE, PUBLICATION OR DISTRIBUTION IN WHOLE OR IN PART, IN, INTO OR FROM THE UNITED STATES, AUSTRALIA, CANADA OR JAPAN OR ANY JURISDICTION WHERE TO DO SO WOULD CONSTITUTE A VIOLATION OF THE RELEVANT LAWS OF SUCH JURISDICTION. THIS ANNOUNCEMENT IS FOR INFORMATION PURPOSES ONLY AND THE INFORMATION CONTAINED HEREIN DOES NOT CONSTITUTE AN OFFER TO SELL OR ACQUIRE SECURITIES IN THE UNITED STATES, AUSTRALIA, CANADA, JAPAN OR IN ANY OTHER JURISDICTION.

AIM: CER

CERILLION PLC

("Cerillion" or the "Company")

RESULT OF SECONDARY SHARE SALE

Further to the announcement made on 11 June 2025, Louis Hall (the "Selling Shareholder") announces the sale of 3,043,295 ordinary shares ("Placing Shares") in the share capital of Cerillion at a price of 1500 pence per Placing Share, which represents approximately 10.3% of Cerillion's issued share capital (excluding ordinary shares held in treasury) (the "Placing").

The Placing was underpinned by very strong support from existing shareholders, and certain non-holders, including from the USA, UK and Europe, have joined the share register. The Placing remained significantly over-subscribed at the increased transaction size.

This is CEO Louis Hall's first sale of shares since 2017. The sale diversifies his asset base, broadens the shareholder base and significantly increases liquidity, supporting the Company's future growth prospects. Following completion of the Placing, Louis Hall remains the Company's largest shareholder with a resultant holding of 5,944,414 ordinary shares, representing 20.1% of Cerillion's issued share capital (excluding ordinary shares held in treasury).

The Placing, conducted through an accelerated bookbuild, raised aggregate gross proceeds of £45.6 million. Panmure Liberum Limited ("Panmure Liberum") acted as sole bookrunner for the Selling Shareholder in connection with the Placing.

The Selling Shareholder has undertaken not to dispose of any further Ordinary Shares in Cerillion for a period of 365 days following completion of the Placing, subject to certain exceptions and waiver by Panmure Liberum ("Lock-in period"). In addition, the Seller has undertaken to adhere to an orderly market provision for a further 180 days on conclusion of the Lock-in period.

The trade date for the Placing will be 12 June 2025 and settlement is expected to occur on 16 June 2025.

Cerillion will not receive any proceeds from the Placing.

Enquiries:

Panmure Liberum

Sole Bookrunner to the Selling Shareholder

Nominated Adviser & Joint Corporate Broker to Cerillion

Bidhi Bhoma, Edward Mansfield, Freddie Wooding                          +44 20 3100 2000

Notification and public disclosure of transactions by persons discharging managerial responsibilities and persons closely associated with them

IMPORTANT NOTICE

Members of the public are not eligible to take part in the Placing. This announcement is for information purposes only and is directed only at: (a) persons in member states of the European Economic Area ("EEA") who are qualified investors within the meaning of Article 2(e) of regulation (EU) 2017/1129 (the "Prospectus Regulation") ("Qualified Investors") and (b) in the United Kingdom, persons who (i) have professional experience in matters relating to investments who fall within the definition of "Investment Professionals" in Article 19(5) of the Financial Services And Markets Act 2000 (Financial Promotion) Order 2005, as amended (the "Order"), or are high net worth companies, unincorporated associations or partnerships or trustees of high value trusts as described in Article 49(2) of the order and (ii) are "Qualified Investors" as defined in prospectus regulation as it forms part of domestic law by virtue of the European Union (Withdrawal) Act 2018 and (c) otherwise, to persons to whom it may otherwise be lawful to communicate it (each a "Relevant Person"). No other person should act or rely on this announcement and persons distributing this announcement must satisfy themselves that it is lawful to do so. Any investment or investment activity to which this announcement relates is available only to relevant persons and will be engaged in only with relevant persons. The announcement does not itself constitute an offer for sale of any securities.

This announcement is not for publication or distribution or release, directly or indirectly, in or into the United States of America (including its territories and possessions, any state of the United States and the District of Columbia), Canada, Australia, Japan, South Africa or any other jurisdiction where such an announcement would be unlawful. The distribution of this announcement may be restricted by law in certain jurisdictions and persons into whose possession this document or other information referred to herein comes should inform themselves about and observe any such restriction. Any failure to comply with these restrictions may constitute a violation of the securities laws of any such jurisdiction. No action has been taken that would permit an offering of the Placing Shares or possession or distribution of this announcement in any jurisdiction where action for that purpose is required.

The Placing Shares have not been, and will not be, registered under the United States Securities Act of 1933, as amended (the "Securities Act"), or with any securities regulatory authority of any State or other jurisdiction of the United States, and may not be offered, sold, or transferred, directly or indirectly, in or into the United States except pursuant to an exemption from, or in a transaction not subject to, the registration requirements of the Securities Act and in compliance with the securities laws of any State or any other jurisdiction of the United States. Accordingly, the Placing Shares will be offered and sold only (i) outside of the United States in "offshore transactions" to persons who are not "U.S. persons" within the meaning of and pursuant to Regulation S under the Securities Act; and (ii) within the United States only to persons who are reasonably believed to be "qualified institutional buyers" (as defined in Rule 144A under the Securities Act) pursuant to an exemption from, or in a transaction not subject to, registration under the Securities Act. No public offering of the Placing Shares will be made in the United States or elsewhere.

Panmure Liberum is authorised and regulated by the Financial Conduct Authority. Panmure Liberum is acting for the Selling Shareholder only in connection with the Placing and no one else, and will not be responsible to anyone other than the Selling Shareholder for providing the protections offered to clients of Panmure Liberum nor for providing advice in relation to the Placing Shares or the Placing, the contents of this announcement or any transaction, arrangement or other matter referred to in this announcement.