CK Infrastructure Holdings Limited — Proxy Solicitation & Information Statement 2026

Apr 8, 2026

CK Infrastructure Holdings Limited 長江基建集團有限公司

(Incorporated in Bermuda with limited liability)

（於百萬遠註冊成立之有限公司）

(Stock Code 股份代號: 1038)

NOTIFICATION LETTER

Dear Non-registered Holder(s) (Note 1),

8th April, 2026

CK Infrastructure Holdings Limited ("Company")

1. Special General Meeting ("SGM") of the Company

The SGM of the Company will be held as a hybrid meeting at 1st Floor, Harbour Grand Kowloon, 20 Tak Fung Street, Hung Hom, Kowloon, Hong Kong and online on Monday, 27th April, 2026 at 1:45 p.m. Hong Kong time (6:45 a.m. London time). The Company encourages Shareholders to: (i) attend the SGM and vote by means of electronic facilities; or (ii) exercise their right to vote at the SGM by appointing the Chairman of the SGM as their proxy.

Attendance at the SGM

In addition to physical attendance, you, as a Non-registered Holder whose shares are held in the Central Clearing and Settlement System through banks, brokers, custodians, nominees or HKSCC Nominees Limited (together, "Intermediary"), have the option of attending, participating, raising questions and voting at the SGM through online access by visiting the website at https://meetings.lumiconnect.com ("Online Platform"). By participating in the SGM via the Online Platform, you will be deemed present at, and will be counted towards the quorum of, the SGM and you will be able to cast your votes and submit questions via the Online Platform. Please refer to the Company's circular dated 8th April, 2026 for details of the SGM arrangements. You can log in to the Online Platform approximately 30 minutes prior to the commencement of the SGM (i.e. from 1:15 p.m. Hong Kong time (6:15 a.m. London time) on 27th April, 2026) by entering the login details to be provided to you by Computershare Hong Kong Investor Services Limited, the Company's Branch Share Registrar upon registration.

Should you wish to attend the Company's SGM online, please contact your Intermediary through whom your shares are held to register your SGM attendance with HKSCC Nominees Limited by providing them with the information they require to enable you to attend, participate and vote.

You should note that the Online Platform permits you to submit your votes in respect of part or all of the shares in respect of which you have been appointed as a proxy or corporate representative by your Intermediary.

All votes and questions must be submitted via the Online Platform at the SGM regardless of whether the attendance is in person at the SGM venue or not. Accordingly, if you (including your proxies or corporate representatives) attend the SGM in person, please bring your smart phones, tablet devices or computers, as well as notifications from the Company's Branch Share Registrar (containing personalised login details) to the SGM venue. You are reminded to keep the login details in safe custody and not to disclose them to any third parties. The submission of votes via the Online Platform using your login details will be conclusive evidence that the votes were validly cast by you as a proxy or corporate representative of your Intermediary. Neither the Company nor its agents assume any obligation or liability whatsoever in connection with the transmission of the login details or any use of the login details for voting or otherwise. The Company and its agents take no responsibility for any loss or other consequence caused by or resulting from any unauthorised use of the login details.

Documents required to be made available at the SGM are accessible from the Company's website (https://www.cki.com.hk).

The Company may need to change the SGM arrangements at short notice. Shareholders should check the Company's website at https://www.cki.com.hk or the Company's SGM website at https://www.cki.com.hk/english/SGM for future announcements and updates on the SGM arrangements.

2. Notice of publication of (1) Circular ("Circular") dated 8th April, 2026 in relation to the Disposal of UK Power Networks and Notice of the Special General Meeting ("SGM Notice"), (2) SGM Notice and (3) Proxy Form (collectively "Current Corporate Communications")

The Company's Current Corporate Communications (both English and Chinese versions) are available on the Company's website at https://www.cki.com.hk and the website of Hong Kong Exchanges and Clearing Limited ("HKEX") at https://www.hkexnews.hk. You may access the Current Corporate Communications by clicking "Investor Information" on the home page of the Company's website or by searching under "Listed Company Information" on the website of HKEX. Copies of the English version of the Circular and SGM Notice have also been submitted to the National Storage Mechanism and will shortly be available for inspection at: https://data.fca.org.uk/#/nsm/nationalstoragemenchanism. Viewing the above documents requires Adobe® Reader®.

If you wish to receive the Corporate Communications (Note 2) from the Company in printed form, please follow the instructions set out in the "Dissemination of Corporate Communications" section under "Investor Information" on the Company's website, to complete the relevant Request Form and return the completed form to the Company's Branch Share Registrar, Computershare Hong Kong Investor Services Limited by email at cki.ecom@computershare.com.hk or by post to 17M Floor, Hopewell Centre, 183 Queen's Road East, Hong Kong. Any such request from you will cease to be valid after one year, or such shorter period if the original request is revoked in writing, or superseded by a subsequent written request, by you, prior to the expiry date of the original request. If you wish to continue to receive Corporate Communications in printed form after expiry of the original request, you must complete and return a fresh Request Form.

Should you have any queries relating to this letter, please contact the Company's Branch Share Registrar by telephone at (852) 2862 8558.

Yours faithfully,

CK Infrastructure Holdings Limited

Notes:

1. This letter is addressed to Non-registered Holders (a "Non-registered Holder" means such person or company whose shares in the Company are held in The Central Clearing and Settlement System (CCASS) and who has notified the Company from time to time through Hong Kong Securities Clearing Company Limited to receive Corporate Communications). If you have sold or transferred all of your shares in the Company, please disregard this letter.
2. "Corporate Communications" refer to any documents issued or to be issued by the Company for the information or action of holders of any of the Company's shares or securities or the investing public, including but not limited to directors' reports, annual accounts and auditor's reports, interim reports, notices of meetings, listing documents, circulars and proxy forms.

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CCK Infrastructure Holdings Limited 長江基建集團有限公司

(Incorporated in Bermuda with limited liability)

（於百萬達註冊成立之有限公司）

(Stock Code 股份代號: 1038)

通知信函

各位非登記持有人(註注)：

CK Infrastructure Holdings Limited 長江基建集團有限公司（「本公司」）

1. 本公司股東特別大會（「股東特別大會」）

本公司之股東特別大會將以混合大會方式於二零二六年四月二十七日（星期一）下午一時四十五分（香港時間）（上午六時四十五分（倫敦時間））假座香港九龍紅磡德豐街20號九龍海逸君綽酒店一樓及網上舉行。本公司鼓勵股東：(i)透過電子設施出席股東特別大會並於會上投票；或 (ii)委任股東特別大會主席為其代表，行使其於股東特別大會上投票之權利。

出席股東特別大會

如閣下為透過銀行、經紀、託管商、代理人或香港中央結算（代理人）有限公司（統稱「中介公司」）於中央結算及交收系統持有股份的非登記持有人，除親身出席股東特別大會外，閣下可選擇透過網上方式一瀏覽網站 https://meetings.lumiconnect.com（「網上平台」）出席、參與股東特別大會，並於會上提問及投票。透過網上平台參與股東特別大會，閣下將被視為出席股東特別大會，並計入股東特別大會法定人數內，而閣下將可透過網上平台投票及提交問題。有關股東特別大會安排之詳情，請參閱本公司日期為二零二六年四月八日之通函。股東特別大會開始前的三十分鐘（即由二零二六年四月二十七日下午一時十五分（香港時間）（上午六時十五分（倫敦時間））開始），閣下可輸入於登記時由本公司股份登記分處香港中央證券登記有限公司提供予閣下的登入資料，以登入股東特別大會網上平台。

如閣下欲透過網上方式出席本公司股東特別大會，請聯絡代閣下持有股份的中介公司並提供所需資料，以便代為向香港中央結算（代理人）有限公司登記閣下出席股東特別大會的意願，以讓閣下能出席。參與股東特別大會，並於會上投票。

務請閣下注意，網上平台允許閣下就中介公司已委任閣下作為代表或公司代表的部分或全數股份進行投票。

無論閣下是否親身前往股東特別大會會場出席股東特別大會，所有投票及提問必須於股東特別大會上透過網上平台提交。因此，如閣下（包括閣下之受委代表或公司代表）親身出席股東特別大會，請自行攜帶智能電話、平板裝置或電腦，以及本公司股份登記分處發出之通知（載有個人登入資料）前往股東特別大會會場。務請閣下妥善保管登入資料，切勿向任何第三方透露。透過網上平台以閣下的登入資料提交之投票，將為閣下作為中介公司代表或公司代表進行有效投票的最終證明。本公司及其代理概不就傳送登入資料或任何使用登入資料作投票或其他用途承擔任何義務或責任。本公司及其代理概不就未經授權使用登入資料而引起或導致之任何損失或其他後果承擔責任。

需於股東特別大會上提供的文件可於本公司網站（https://www.cki.com.hk）瀏覽。

本公司可能須於短時間內就股東特別大會安排作出更改。股東應在本公司網站 https://www.cki.com.hk 或本公司股東特別大會網站 https://www.cki.com.hk/chinese/SGM 查閱有關股東特別大會安排之後續公告及最新資訊。

2. (1)有關出售 UK Power Networks 及股東特別大會通告之日期為二零二六年四月八日之通函（「通函」）。(2)股東特別大會通告，以及(3)代表委任表格（統稱「是次公司通訊」）之發佈通知

本公司是次公司通訊（英文及中文版）已於本公司網站 https://www.cki.com.hk 及香港交易及結算所有限公司（「香港交易所」）網站 https://www.hkexnews.hk 登載。請在本公司網站主頁按「投資訊息」或在香港交易所網站「上市公司公告」下搜尋，以瀏覽是次公司通訊。通函及股東特別大會通告之英文版亦已提交至 National Storage Mechanism，稍後將可於 https://data.fca.org.uk/#/nsm/nationalstoragemechanism 以供查閱。以上文件須使用 Adobe® Reader® 開啟。

閣下如欲收取本公司之公司通訊(註注)印刷本，謹請按照本公司網站「投資訊息」下「發佈公司通訊」欄目內之指示填妥相關要求表格，並將填妥之表格以電郵發送至 cki.ecom@computershare.com.hk 或郵寄至香港皇后大道東183號合和中心17M樓，交回本公司股份登記分處香港中央證券登記有限公司。閣下之任何該等要求將於一年後失效。然而，倘於原有要求失效日期前，閣下書面撤回原有要求或提出後續書面要求取代原有要求，原有要求將更早失效。閣下如欲於原有要求失效後繼續收取公司通訊印刷本，閣下必須交回一份填妥之新要求表格。

倘閣下對本信函有任何疑問，請致電本公司股份登記分處香港中央證券登記有限公司（電話 (852) 2862 8558）查詢。

CK Infrastructure Holdings Limited
長江基建集團有限公司
謹啟

二零二六年四月八日

附註：

1. 此為致本公司非登記持有人（「非登記持有人」指該等持有本公司股份並存放於中央結算及交收系統的人士或公司，透過香港中央結算有限公司不時向本公司發出通知，表示該收取公司通訊）之信函。倘閣下已出售或轉讓所持有之全部本公司股份，則毋須理會本信函。
2. 「公司通訊」指任何本公司發出或將予發出以供任何本公司股份或證券持有人或投資者參照或採取行動之任何文件。包括但不限於董事會報告、年度賬目及核數師報告、中期報告、會議通告、上市文件、通函及代表委任表格。