THIS ANNOUNCEMENT AND THE INFORMATION CONTAINED HEREIN IS RESTRICTED AND NOT FOR RELEASE, PUBLICATION OR DISTRIBUTION, IN WHOLE OR IN PART, IN OR INTO THE UNITED STATES OF AMERICA, CANADA, AUSTRALIA, JAPAN, THE REPUBLIC OF SOUTH AFRICA OR ANY OTHER JURISDICTION IN WHICH SUCH RELEASE, PUBLICATION OR DISTRIBUTION WOULD BE UNLAWFUL. PLEASE SEE THE IMPORTANT NOTICE AT THE END OF THIS ANNOUNCEMENT.

THIS ANNOUNCEMENT AMOUNTS TO A FINANCIAL PROMOTION FOR THE PURPOSES OF SECTION 21 OF THE FINANCIAL SERVICES AND MARKETS ACT 2000 (FINANCIAL PROMOTION) ORDER 2005, AS AMENDED, AND HAS BEEN APPROVED ON 6 JULY 2026 BY ALLENBY CAPITAL LIMITED WHICH IS AUTHORISED AND REGULATED BY THE FINANCIAL CONDUCT AUTHORITY (FRN 489795). THIS ANNOUNCEMENT IS FOR INFORMATIONAL PURPOSES ONLY, AND DOES NOT CONSTITUTE OR FORM PART OF ANY OFFER OR INVITATION TO SELL OR ISSUE, OR ANY SOLICITATION OF AN OFFER TO PURCHASE OR SUBSCRIBE FOR, ANY SECURITIES OF ENSILICA PLC.

7 July 2026

EnSilica plc

("EnSilica", the "Company" or the "Group")

Retail Offer to raise up to £1 million

EnSilica plc (AIM: ENSI), a leading fabless microchip maker with a growing portfolio of reusable IP, serving the Space and Communications, Industrial, and Automotive markets, announces a retail offer via the BookBuild Platform to raise up to £1 million (the "Retail Offer") through the issue of new ordinary shares of 0.1 pence each in the capital of the Company ("Ordinary Shares").

Under the Retail Offer up to 1,098,901 new Ordinary Shares (the "Retail Offer Shares") will be made available at an issue price of 91 pence per new Ordinary Share (the "Issue Price") to new retail investors and existing shareholders of the Company in the United Kingdom through financial intermediaries registered with the Bookbuild Platform.

In addition to the Retail Offer and as announced earlier today, the Company has conditionally raised gross proceeds of approximately £14 million through a placing and subscription of new Ordinary Shares (respectively, the "Placing Shares" and the "Subscription Shares", and together with the Retail Offer Shares, the "New Ordinary Shares") at the Issue Price (respectively, the "Placing" and the "Subscription", and together with the Retail Offer, the "Fundraise"). The first tranche of the Placing of approximately £10.73 million is expected to complete on or around 10 July 2026, and the second tranche of the Placing and Subscription of approximately £3.27 million is expected to complete on or around 29 July 2026, subject to the passing of resolutions at a General Meeting as detailed below.

Net proceeds from the Retail Offer will be used for the same purposes as funds raised from the Placing and Subscription as set out in the Company's announcement of 6 July 2026.

The issue of the Retail Offer Shares is conditional upon, inter alia, the passing of resolutions to be proposed at a General Meeting, which is expected to be held at the offices of Fieldfisher LLP at Riverbank House, 2 Swan Lane, London, EC4R 3TT at 10.00 a.m. on 27 July 2026. Conditional upon the passing of the resolutions at the General Meeting, the Retail Offer Shares to be issued pursuant to the Retail Offer are expected to be admitted to trading on the AIM market operated by the London Stock Exchange ("Retail Admission") at 8.00 a.m. on or around 29 July 2026 (or such later time and/or date as the Bookrunners and the Company may agree (being in any event no later than 8.00 a.m. on 12 August 2026)).

Completion of the Retail Offer is conditional, inter alia, upon the completion of the Placing and the Subscription. However, completion of the Placing and the Subscription is not conditional on the completion of, or part of, the Retail Offer.

Expected timetable in relation to the Retail Offer

Any changes to the expected timetable set out above will be notified by the Company through a Regulatory Information Service. References to times are to London times unless otherwise stated.

Dealing codes

Retail Offer

The Company believes that it is appropriate to provide new retail investors and existing 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 only through the financial intermediaries which will be listed, subject to certain access restrictions, on the following website: https://www.bookbuild.live/deals/DQ0RY7/authorised-intermediaries.

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

Existing shareholders and new retail investors in the United Kingdom can contact their broker or wealth manager to participate in the Retail Offer. In order to participate in the Retail Offer, each intermediary must be on-boarded onto the BookBuild Platform and agree to the final terms and the retail offer terms and conditions, which regulate, inter alia, the conduct of the Retail Offer on market standard terms and provide for the payment of commission to any intermediary that elects to receive a commission and/or fee (to the extent permitted by the FCA Handbook Rules) from the Retail Offer Coordinator (on behalf of the Company).

The Placing and Subscription closed on 6 July 2026. New and existing retail investors are not entitled to participate in the Placing or the Subscription.

Participation of any intermediary in the Retail Offer is at the absolute discretion of the Retail Offer Coordinator.

Any expenses incurred by any intermediary are for its own account. Eligible Retail Investors (as defined below) should confirm separately with any intermediary whether there are any commissions, fees or expenses that will be applied by such intermediary in connection with any application made through that intermediary pursuant to the Retail Offer.

The Retail Offer will be open to Eligible Retail Investors (as defined below) in the United Kingdom at 7.05 a.m. on 7 July 2026. The Retail Offer is expected to close at 12:00 p.m. on 9 July 2026 but may, at the absolute discretion of the Retail Offer Coordinator, be closed early or cancelled. Eligible Retail Investors should note that financial intermediaries may have earlier closing times. The Retail Offer may close early if it is oversubscribed or otherwise at the absolute discretion of the Retail Offer Coordinator or the BookBuild Platform.

If any intermediary has any questions about how to participate in the Retail Offer on behalf of Eligible Retail Investors, please contact BookBuild at [email protected].

To be eligible to participate in the Retail Offer (an "Eligible Retail Investors"), applicants must meet the following criteria before they can submit an order for Retail Offer Shares: (i) be a customer of one of the participating intermediaries listed on the above BookBuild website; (ii) be resident in the United Kingdom; and (iii) be aged 18 years or over.

The Company and the Retail Offer Coordinator reserve the right to scale back any order at their absolute discretion. The Company and the Retail Offer Coordinator reserve the right at their absolute discretion to reject any application for subscription under the Retail Offer without giving any reason for such rejection.

It is vital to note that once an application for Retail Offer Shares has been made and accepted via an intermediary, it cannot be withdrawn.

The Retail Offer Shares will, when issued, be credited as fully paid and will rank pari passu in all respects with existing Ordinary Shares including the right to receive all dividends and other distributions declared, made or paid after their date of issue.

The Retail Offer is offered in the United Kingdom under an exemption from the prohibition of public offers specified in Part 1 of Schedule 1 of the Public Offers and Admissions to Trading Regulations 2024.

The Retail Offer is not being made into any jurisdiction other than the United Kingdom and is not being made to U.S. Persons (as defined in Regulation S of the U.S. Securities Act 1933, as amended).

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) ("MAR") 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 Eligible Retail 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/DQ0RY7/authorised-intermediaries.

There is no maximum application amount to apply in the Retail Offer except that the aggregate total consideration for the Retail Offer shall not exceed £1 million. The terms and conditions on which investors subscribe will be provided by the relevant financial intermediaries including relevant commission or fee charges.

Key investment risks

Investors should make their own investigations into the merits of an investment in the Company. Nothing in this announcement amounts to a recommendation to invest in the Company's Ordinary Shares or amounts to investment, taxation or legal advice.

It should be noted that a subscription for Retail Offer Shares and investment in the Company carries a number of risks. Investors should take independent advice from a person experienced in advising on investment in securities such as the Retail Offer Shares if they are in any doubt.

An investment in the Company will place capital at risk. The value of investments, and any income, can go down as well as up, so investors could get back less than the amount invested. The return of your investment is not guaranteed, and you may get back less than you originally invested. Neither past performance nor any forecasts should be considered a reliable indicator of future results.

The potential gains and losses that may arise from your investments will depend on your appetite for risk and how you manage your approach to risk. Investing all your money into one type of investment can be a high-risk strategy and concentrate risks to which you and that type of investment may be exposed. A managed approach to risk may be to diversify your investments you make across different companies' securities and different asset classes.

Unless otherwise defined, definitions contained in this Announcement have the same meaning as set out in the announcement made by the Company on 6 July 2026.

For further information please contact:

About EnSilica plc

EnSilica is a fabless, application-specific chipmaker, combining deep domain and system-level expertise with world-class capability in RF, mmWave, mixed-signal and complex digital IC design. The Company serves customers across the space and communications, industrial, and automotive markets, where safety, security and reliability are critical.

A growing portfolio of reusable IP and silicon platforms underpins a repeatable, scalable delivery model, reducing development risk, cost and time to market while supporting long-term supply revenues. EnSilica has a strong track record of delivering production-proven silicon to demanding industry standards. Headquartered near Oxford, UK, the Company operates design centres across the UK, India, Brazil and Hungary.

LEI: 213800R6VXRU7MJTAF04

This announcement should be read in its entirety. In particular, the information in the "Important Notices" section of the announcement should be read and understood.

IMPORTANT NOTICES

The content of this announcement has been prepared by and is the sole responsibility of the Company.

This announcement amounts to a financial promotion for the purposes of Section 21 of the Financial Services and Markets Act 2000 (Financial Promotion) Order 2005, as amended, and has been approved by Allenby Capital Limited which is authorised and regulated by the Financial Conduct Authority (FRN 489795). Allenby Capital is situated at 5 St. Helen's Place, London EC3A 6AB.

This announcement and the information contained herein is not for release, publication or distribution, directly or indirectly, in whole or in part, in or into or from the United States (including its territories and possessions, any state of the United States and the District of Columbia (the "United States" or "U.S.")), Australia, Canada, Japan, the Republic of South Africa, any member state of the EEA or any other jurisdiction where to do so might constitute a violation of the relevant laws or regulations of such jurisdiction.

The Retail Offer Shares have not been and will not be registered under the U.S. Securities Act of 1933, as amended (the "U.S. Securities Act") or under the applicable state securities laws of the United States and may not be offered or sold directly or indirectly in or into the United States. No public offering of the Retail Offer Shares is being made in the United States. The Retail Offer Shares are being offered and sold outside the United States in "offshore transactions", as defined in, and in compliance with, Regulation S under the U.S. Securities Act ("Regulation S") to non-U.S. persons (within the meaning of Regulation S). In addition, the Company has not been, and will not be, registered under the U.S. Investment Company Act of 1940, as amended.

This announcement does not constitute an offer to sell or issue or a solicitation of an offer to buy or subscribe for Retail Offer Shares in the United States, Australia, Canada, New Zealand, Japan, the Republic of South Africa, any member state of the EEA or any other jurisdiction in which such offer or solicitation is or may be unlawful. No public offer of the securities referred to herein is being made in any such jurisdiction.

This announcement is not for publication or distribution, directly or indirectly, in or into the United States of America.  This announcement is not an offer of securities for sale into the United States.  The securities referred to herein have not been and will not be registered under the U.S. Securities Act and may not be offered or sold in the United States, except pursuant to an applicable exemption from registration.  No public offering of securities is being made in the United States.

The distribution of this announcement may be restricted by law in certain jurisdictions and persons into whose possession any 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.

Allenby Capital Limited ("Allenby Capital") is authorised and regulated in the United Kingdom by the Financial Conduct Authority, and is acting exclusively for the Company and for no-one else and will not regard any other person (whether or not a recipient of this announcement) as its client in relation to the Retail Offer and will not be responsible to anyone other than the Company for providing the protections afforded to its clients, nor for providing advice in connection with the Retail Offer, Admission and the other arrangements referred to in this announcement. The responsibilities of Allenby Capital Limited as the Company's nominated adviser under the AIM Rules for Nominated Advisers are owed solely to the London Stock Exchange and are not owed to the Company or to any director of the Company or to any other person.

The value of Ordinary Shares and the income from them is not guaranteed and can fall as well as rise due to stock market movements. When you sell your investment, you may get back less than you originally invested. Figures refer to past performance and past performance is not a reliable indicator of future results. Returns may increase or decrease as a result of currency fluctuations.

Certain statements in this announcement are forward-looking statements which are based on the Company's expectations, intentions and projections regarding its future performance, anticipated events or trends and other matters that are not historical facts. These forward-looking statements, which may use words such as "aim", "anticipate", "believe", "intend", "estimate", "expect" and words of similar meaning, include all matters that are not historical facts. These forward-looking statements involve risks, assumptions and uncertainties that could cause the actual results of operations, financial condition, liquidity and dividend policy and the development of the industries in which the Company's businesses operate to differ materially from the impression created by the forward-looking statements. These statements are not guarantees of future performance and are subject to known and unknown risks, uncertainties and other factors that could cause actual results to differ materially from those expressed or implied by such forward-looking statements. Given those risks and uncertainties, prospective investors are cautioned not to place undue reliance on forward-looking statements.

These forward-looking statements speak only as at the date of this announcement and cannot be relied upon as a guide to future performance. The Company, Allenby Capital Limited or Panmure Liberum Limited expressly disclaim any obligation or undertaking to update or revise any forward-looking statements contained herein to reflect actual results or any change in the assumptions, conditions or circumstances on which any such statements are based unless required to do so by the Financial Conduct Authority, the London Stock Exchange or applicable law.

The information in this announcement is for background purposes only and does not purport to be full or complete. None of Allenby Capital Limited or Panmure Liberum Limited or any of its affiliates, accepts any responsibility or liability whatsoever for, or makes any representation or warranty, express or implied, as to this announcement, including the truth, accuracy or completeness of the information in this announcement (or whether any information has been omitted from the announcement) or any other information relating to the Company or associated companies, whether written, oral or in a visual or electronic form, and howsoever transmitted or made available or for any loss howsoever arising from any use of the announcement or its contents or otherwise arising in connection therewith. Allenby Capital Limited, Panmure Liberum Limited, BookBuild and its affiliates, accordingly, disclaim all and any liability whether arising in tort, contract or otherwise which they might otherwise be found to have in respect of this announcement or its contents or otherwise arising in connection therewith.

Any indication in this announcement of the price at which the Ordinary Share have been bought or sold in the past cannot be relied upon as a guide to future performance. Persons needing advice should consult an independent financial adviser. No statement in this announcement is intended to be a profit forecast and no statement in this announcement should be interpreted to mean that earnings or target dividend per share of the Company for the current or future financial years would necessarily match or exceed the historical published earnings or dividends per share of the Company.

Neither the content of the Company's website (or any other website) nor the content of any website accessible from hyperlinks on the Company's website (or any other website) is incorporated into or forms part of this announcement. The Retail Offer Shares to be issued or sold pursuant to the Retail Offer will not be admitted to trading on any stock exchange other than the London Stock Exchange plc.

Allenby Capital, which is authorised and regulated by the FCA in the United Kingdom, is acting as Nominated Adviser, Joint Broker and Joint Bookrunner to the Company in connection with the Placing and Retail Offer Coordinator in connection with the Retail Offer. Allenby Capital will not be responsible to any person other than the Company for providing the protections afforded to clients of Allenby Capital or for providing advice to any other person in connection with the Placing, the Retail Offer or any acquisition of shares in the Company. Allenby Capital has not authorised the contents of, or any part of, this announcement, no representation or warranty, express or implied, is made by Allenby Capital in respect of such contents, and no liability whatsoever is accepted by Allenby Capital for the accuracy of any information or opinions contained in this Announcement or for the omission of any material information, save that nothing shall limit the liability of Allenby Capital for its own fraud. Allenby Capital's responsibilities as the Company's nominated adviser under the AIM Rules for Nominated Advisers are owed solely to the London Stock Exchange and are not owed to the Company or to any Director or to any other person.

Panmure Liberum Limited ("Panmure Liberum"), which is authorised and regulated by the FCA in the United Kingdom, is acting as Joint Broker and Joint Bookrunner to the Company in connection with the Placing. Panmure Liberum will not be responsible to any person other than the Company for providing the protections afforded to clients of Panmure Liberum or for providing advice to any other person in connection with the Placing, the Retail Offer or any acquisition of shares in the Company. Panmure Liberum is not making any representation or warranty, express or implied, as to the contents of this Announcement. Panmure Liberum has not authorised the contents of, or any part of, this Announcement, and no liability whatsoever is accepted by Panmure Liberum for the accuracy of any information, or opinions contained in this Announcement or for the omission of any material information, save that nothing shall limit the liability of Panmure Liberum for its own fraud.

UK Product Governance Requirements

Solely for the purposes of the product governance requirements of Chapter 3 of the FCA Handbook Product Intervention and Product Governance Sourcebook (the "UK MiFIR Product Governance Requirements"), and disclaiming all and any liability, whether arising in tort, contract or otherwise, which any "manufacturer" (for the purposes of the UK MiFIR Product Governance Requirements) may otherwise have with respect thereto, the Retail Offer Shares have been subject to a product approval process, which has determined that the Retail Offer Shares are: (i) compatible with an end target market of retail investors and investors who meet the criteria of professional clients and eligible counterparties, each as defined in paragraphs 3.5 and 3.6 of COBS; and (ii) eligible for distribution through all permitted distribution channels (the "Target Market Assessment"). Notwithstanding the Target Market Assessment, distributors should note that: the price of the Retail Offer Shares may decline and investors could lose all or part of their investment; the Retail Offer Shares offer no guaranteed income and no capital protection; and an investment in the Retail Offer Shares is compatible only with investors who do not need a guaranteed income or capital protection, who (either alone or in conjunction with an appropriate financial or other adviser) are capable of evaluating the merits and risks of such an investment and who have sufficient resources to be able to bear any losses that may result therefrom. The Target Market Assessment is without prejudice to any contractual, legal or regulatory selling restrictions in relation to the Retail Offer.

For the avoidance of doubt, the Target Market Assessment does not constitute: (a) an assessment of suitability or appropriateness for the purposes of Chapters 9A or 10A respectively of COBS; or (b) a recommendation to any investor or group of investors to invest in, or purchase, or take any other action whatsoever with respect to the Retail Offer Shares. Each distributor is responsible for undertaking its own target market assessment in respect of the Retail Offer Shares and determining appropriate distribution channels.

EU Product Governance Requirements

Solely for the purposes of the product governance requirements contained within: (a) EU Directive 2014/65/EU on markets in financial instruments, as amended ("MiFID II"); (b) Articles 9 and 10 of Commission Delegated Directive (EU) 2017/593 supplementing MiFID II; and (c) local implementing measures (together, the "MiFID II Product Governance Requirements"), and disclaiming all and any liability, whether arising in tort, contract or otherwise, which any "manufacturer" (for the purposes of the MiFID II Product Governance Requirements) may otherwise have with respect thereto, the Retail Offer Shares have been subject to a product approval process, which has determined that the Retail Offer Shares are: (i) compatible with an end target market of retail investors and investors who meet the criteria of professional clients and eligible counterparties, each as defined in MiFID II; and (ii) eligible for distribution through all distribution channels as are permitted by MiFID II (the "EU Target Market Assessment"). Notwithstanding the EU Target Market Assessment, distributors should note that: the price of the Retail Offer Shares may decline and investors could lose all or part of their investment; the Retail Offer Shares offer no guaranteed income and no capital protection; and an investment in the Retail Offer Shares is compatible only with investors who do not need a guaranteed income or capital protection, who (either alone or in conjunction with an appropriate financial or other adviser) are capable of evaluating the merits and risks of such an investment and who have sufficient resources to be able to bear any losses that may result therefrom. The EU Target Market Assessment is without prejudice to the requirements of any contractual, legal or regulatory selling restrictions in relation to the Retail Offer.

For the avoidance of doubt, the EU Target Market Assessment does not constitute: (a) an assessment of suitability or appropriateness for the purposes of MiFID II; or (b) a recommendation to any investor or group of investors to invest in, or purchase or take any other action whatsoever with respect to the Retail Offer Shares. Each distributor is responsible for undertaking its own target market assessment in respect of the Retail Offer Shares and determining appropriate distribution channels.