NOTICE OF 2024 FIRST CLASS MEETING OF THE HOLDERS OF H SHARES

Hong Kong Exchanges and Clearing Limited and The Stock Exchange of Hong Kong Limited take no responsibility for the contents of this announcement make no representation as to its accuracy or completeness and expressly disclaim any liability whatsoever for any loss howsoever arising from or in reliance upon the whole or any part of the contents of this announcement.马鞍山钢铁股份有限公司 Maanshan Iron & Steel Company Limited (A joint stock limited company incorporated in the People’s Republic of China) (Stock Code: 00323) NOTICE OF 2024 FIRST CLASS MEETING OF THE HOLDERS OF H SHARES NOTICE IS HEREBY GIVEN that the 2024 first class meeting of the holders of H shares (the “H Shareholders’ Class Meeting”) of Maanshan Iron & Steel Company Limited (the “Company”) will be held at the Magang Office Building No. 8 Jiu Hua Xi Road Maanshan City Anhui Province the People’s Republic of China (the “PRC”) at 2:30 p.m. on Wednesday 19 June 2024 (or following the 2023 annual general meeting and 2024 first class meeting of the holders of A shares or any adjournment thereof).The following resolution will be considered at the H Shareholders’ Class Meeting: SPECIAL RESOLUTION Resolution for non-cumulative voting 1. To consider and approve the amendments to the Articles of Association of Maanshan Iron & Steel Company Limited and its appendices This class meeting of the holders of H shares is held for holders of H shares to furtherconsider and approve the 2nd resolution “To consider and approve the amendmentsto the Articles of Association of Maanshan Iron & Steel Company Limited and itsappendices” considered at the 2024 First Extraordinary General Meeting held on 29 May 2024. For the content and background of the said resolution please refer to the announcement of the Company dated 16 April 2024 and the circular of the Company dated 6 May 2024.By Order of the Board Maanshan Iron & Steel Company Limited Ren Tianbao Secretary to the Board 30 May 2024 Maanshan City Anhui Province the PRC As at the date of this announcement the directors of the Company include executive directors Jiang Yuxiang Mao Zhanhong and Ren Tianbao; and independent non-executive directors Guan Bingchun He Anrui Liao Weiquan and Qiu Shengtao.– 1 –Notes: I. ELIGIBILITY FOR ATTENDING THE H SHAREHOLDERS’ CLASS MEETING The Company’s register of members for H shares will be closed from Friday 14 June 2024 to Wednesday 19 June 2024 (both days inclusive) during which period no transfer of H shares will be registered. Holders of H shares who wish to be entitled to attend the H Shareholders’ Class Meeting must deliver their instruments of transfer together with the relevant share certificates to The Hong Kong Registrars Limited the Registrar of H shares of the Company by no later than 4:30 p.m. on Thursday 13 June 2024. The address of the Registrar for the Company’s H shares: Shops 1712–1716 Hopewell Centre 183 Queen’s Road East Wanchai Hong Kong. Share registration date for holders of A shares will be announced separately.II. REGISTRATION PROCEDURES FOR ATTENDING THE H SHAREHOLDERS’ CLASS MEETING 1. Holders of H shares shall deliver their copies of transfers for attending the H Shareholders’ Class Meeting share certificates or copies of receipts of share transfer and copies of their own identity cards to the Company by no later than Thursday 13 June 2024. If proxies are appointed by shareholders to attend the meeting they shall in addition to the aforementioned documents deliver the proxy forms and copies of their own identity cards to the Company. 2. Shareholders can deliver the necessary documents for registration to the Company in one of the following ways: in person by post or by facsimile. Upon receipt of such documents the Company will complete the registration procedures for attending the H Shareholders’ Class Meeting.III. APPOINTING PROXIES 1. Shareholders who have the right to attend and vote at the H Shareholders’ Class Meeting are entitled to appoint in writing one or more proxies (whether a shareholder or not) to attend the H Shareholders’ Class Meeting and vote on their behalves. 2. The instrument of appointing a proxy must be in writing signed by the appointer or his attorney duly authorized in writing. If that instrument is signed by an attorney of the appointer the power of attorney authorising that attorney to sign or other documents of authorisation must be notarially certified. The notarially certified power of attorney or other documents of authorisation and proxy forms must be delivered to the registered office of the Company or the H share registrar by not less than 24 hours before the time appointed for the holding of the H Shareholders’ Class Meeting in order for such documents to be valid.IV. Shareholders or their proxies attending the H Shareholders’ Class Meeting shall be responsible for their own food accommodation and travel expenses.V. CONTACT METHODS OF THE COMPANY 1. Registered address: No. 8 Jiu Hua Xi Road Maanshan City Anhui Province the PRC 2. Postal code: 243003 3. Telephone: 86-555-2888158 4. Fax: 86-555-2887284 5. Contact person: Mr. Li Wei –2–