ANNOUNCEMENT ON RESOLUTIONS PASSED AT 2024 SECOND EXTRAORDINARY GENERAL MEETING, 2024 FIRST CLASS MEETING OF THE HOLDERS OF A SHARES AND 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) ANNOUNCEMENT ON RESOLUTIONS PASSED AT 2024 SECOND EXTRAORDINARY GENERAL MEETING 2024 FIRST CLASS MEETING OF THE HOLDERS OF A SHARES AND 2024 FIRST CLASS MEETING OF THE HOLDERS OF H SHARES IMPORTANT NOTE: * Resolution voted down at the 2024 Second Extraordinary General Meeting 2024 First Class Meeting of the Holders of A Shares and 2024 First Class Meeting of the Holders of H Shares (the “Meetings”): None The 2024 Second Extraordinary General Meeting 2024 First Class Meeting of the Holders of A Shares and 2024 First Class Meeting of the Holders of H Shares of Maanshan Iron & Steel Company Limited (the “Company”) were held in succession at the Magang Office Building No. 8 Jiu Hua Xi Road Maanshan City Anhui Province the People’s Republic of China at 2:30 p.m. on Wednesday 19 June 2024. All the resolutions listed in the notices of the Meetings dated 30 May 2024 and 31 May 2024 respectively were approved.I. CONVOCATION AND ATTENDANCE OF THE MEETINGS (I) Date of the Meetings: 19 June 2024 (II) Venue of the Meetings: Magang Office Building No. 8 Jiu Hua Xi Road Maanshan City Anhui Province – 1 –(III) Details of holders of ordinary shares and holders of preference shares with restored voting rights present at the Meetings and their shareholdings: 1. Nu mber of shareholders attending either in person or by proxy 12 Among which: Number of holders of A shares 11 Number of holders of overseas listed foreign shares (H shares) 1 2. Tot al number of shares with voting rights held by shareholders present at the Meetings (shares) 5414543789 Among which: T otal number of shares held by holders of A shares 3696823436 Total number of shares held by holders of overseas listed foreign shares (H shares) 1717720353 3. Pe rcentage of shares with voting rights held by holders present at the Meetings to total number of shares with voting rights of the Company (%) 69.89 Among which: S hares held by holders of A shares to total number of shares (%) 47.72 Shares held by holders of overseas listed foreign shares (H shares) to total number of shares (%) 22.17 The 2024 First Class Meeting of the Holders of A Shares 1. Number of shareholders attending either in person or by proxy 11 2. Total number of shares with voting rights held by shareholders present at the meeting (shares) 3696823436 3. Percentage of shares with voting rights held by holders present at the meeting to total number of shares with voting rights of the Company (%) 47.72 The 2024 First Class Meeting of the Holders of H Shares 1. Number of shareholders attending either in person or by proxy 1 2. Total number of shares with voting rights held by shareholders present at the meeting (shares) 1717720353 3. Percentage of shares with voting rights held by holders present at the meeting to total number of shares with voting rights of the Company (%) 22.17 – 2 –(IV) Voting was held in compliance with stipulations of the Company Law and the Articles of Association of the Company. The Meetings were presided over by Mr. Jiang Yuxiang the chairman of the Company.(V) Directors supervisors and secretary to the board of directors present at the Meetings 1. 7 out of 7 current directors of the Company were present at the Meetings; 2. 3 out of 3 current supervisors of the Company were present at the Meetings; 3. The general manager secretary to the board of directors and deputy general manager of the Company were present at the Meetings; 4. Ms. Ge Zhiqun and Ms. Yi Feifan lawyers from Beijing Zhong Lun Law Firm (Shanghai Office) appointed by the Company attended the Meetings. KPMG Huazhen LLP acted as the scrutineer of the Meetings and Mr. Li Ziyang attended the Meetings on behalf of the institute.II. CONSIDERATION OF RESOLUTIONS (I) Resolution for non-cumulative voting The 2024 Second Extraordinary General Meeting 1. Resolution: To consider and approve the amendments to the Articles of Association of Maanshan Iron & Steel Company Limited and its appendices Result: Approved Voting results: For Against Type of shareholders Number Percentage Number Percentage of votes (%) of votes (%) A shareholders 3666076115 99.17 30747321 0.83 H shareholders 364923578 82.57 77014616 17.43 Total number of ordinary shares: 4030999693 97.40 107761937 2.60 – 3 –The 2024 First Meeting of the Holders of A Shares 1. Resolution: To consider and approve the amendments to the Articles of Association of Maanshan Iron & Steel Company Limited and its appendices Result: Approved Voting results: For Against Type of shareholders Number Percentage Number Percentage of votes (%) of votes (%) A shareholders 3666076115 99.17 30747321 0.83 The 2024 First Meeting of the Holders of H Shares 1. Resolution: To consider and approve the amendments to the Articles of Association of Maanshan Iron & Steel Company Limited and its appendices Result: Approved Voting results: For Against Type of shareholders Number Percentage Number Percentage of votes (%) of votes (%) H shareholders 364923578 82.57 77014616 17.43 (II) Explanation regarding voting on the resolutions Resolution Number 1 of the 2024 Second Extraordinary General Meeting 2024 First Class Meeting of the Holders of A Shares and 2024 First Class Meeting of the Holders of H Shares is a special resolution which is passed by more than two-thirds of the voting rights held by shareholders participating in the voting.– 4 –As at the date of the Meetings save as disclosed above no shareholder entitled to attend the Meetings was required to abstain from voting in favour of the resolutions pursuant to Rule 13.40 of the Rules Governing the Listing of Securities on The Stock Exchange of Hong Kong Limited. There was no restriction on shareholders as to their votes on any resolution at the Meetings and no shareholder entitled to attend the Meetings was required to vote only against the proposed resolutions at the Meetings. Shareholders present in person or by proxy were entitled to one vote for each share they held.III. LAWYER ATTESTATION 1. Attesting law firm for the Meetings: Beijing Zhong Lun Law Firm (Shanghai Office) Lawyers: Ge Zhiqun and Yi Feifan 2. Legal opinion after attestation: The convocat ion and convening procedures of the Meet ings the qualifications of the attendees the voting procedures and voting results were all in compliance with the relevant provisions of laws regulations normative documents such as the Company Law the Rules of Procedures for General Meetings and the Articles of Association of the Company which were lawful and valid.By Order of the Board Maanshan Iron & Steel Company Limited Ren Tianbao Secretary to the Board 19 June 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.–5–