APPOINTMENT OF DIRECTOR, CHAIRMAN AND CHANGE OF AUTHORISED REPRESENTATIVE

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) APPOINTMENT OF DIRECTOR CHAIRMAN AND CHANGE OF AUTHORISED REPRESENTATIVE References are made to the notice of the EGM of Maanshan Iron & Steel Company Limited (the “Company”) dated 6 May 2024 and the circular of the Company (the “Circular”) dated 6 May 2024. Terms used in this announcement shall have the same meaning as those defined in the Circular unless otherwise specified.The Board announces that Mr. Jiang Yuxiang has been appointed as an executive director of the tenth session of the Board of the Company for a term commencing on the date of approval at the EGM of the Company (i.e. 29 May 2024) and ending on the date of expiry of the tenth session of the Board of the Company (i.e. 1 December 2025). Mr. Jiang Yuxiang has been appointed as the chairman of the Company at the 23rd meeting of the tenth session of the Board (the “Meeting”) held on 29 May 2024. Biographical details of the above-mentioned director is as follows: Mr. Jiang Yuxiang: aged 55 holds a doctor’s degree in management and is a senior engineer. Mr. Jiang joined the Company in August 1990 and has served as the director of the office of the Company the factory manager of No. 4 steel mill and the director of the office a member of the standing committee of the party committee the secretary to the board of directors and a deputy general manager of Magang Group. From September 2013 to May 2015 Mr. Jiang served as a member of the standing committee of the party committee the deputy general manager the general counsel and secretary to the board of directors of Magang Group; from May 2015 to November 2019 served as a member of the standing committee of the party committee the deputy general manager and the general counsel of Magang Group; from November 2019 to May 2020 served as a deputy director of the Magang Work Office and the general counsel of Magang Group; from May 2020 to November 2020 served as the general counsel of China Baowu Steel Group Corporation Limited (“China Baowu”) and a deputy director of the Magang Work Office; from November 2020 to March 2022 served as – 1 –the general counsel and head of legal affairs department of China Baowu; from March 2022 to February 2023 served as the general counsel and head of legal affairs and compliance department of China Baowu (in March 2022 the legal affairs department was renamed as the legal affairs and compliance department); from February 2023 to April 2024 served as the general counsel and chief compliance officer head of legal affairs and compliance department and director of bidding office of China Baowu.He has served as the general counsel and chief compliance officer of China Baowu the chairman of the board of directors and the secretary of the party committee of Magang Group the secretary of the party committee of the Company and the general representative of Maanshan headquarter of China Baowu since April 2024.Save as disclosed above the above Director has not held any directorship in any public listed companies whose securities are listed in Hong Kong or any overseas security markets in the last three years has not served in any affiliated companies of the Company and does not have any relationship with any other Directors senior management substantial Shareholder or controlling Shareholder of the Company. As at the date of this announcement the above Director does not have any interests in the shares of the Company within the meaning of Part XV of the Securities and Futures Ordinance.The above director will not receive remuneration from the Company. The Company will enter into a service contract with the above director in respect of his service to the Company stating among other things the annual remuneration and the term of service.No other information relating to the appointment of the above Director is required to be disclosed pursuant to Rules 13.51(2)(h) to (v) of the Listing Rules. Save as disclosed herein there are no other matters that need to be brought to the attention of the Shareholders.In addition the Board at the Meeting agreed that Mr. Ding Yi ceased to be the authorised representative of the Company and Mr. Jiang Yuxiang was appointed as the authorised representative of the Company required under Rule 3.05 of the Listing Rules with effect from 29 May 2024.By Order of the Board Maanshan Iron & Steel Company Limited Ren Tianbao Secretary to the Board 29 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.–2–