OVERSEAS REGULATORY ANNOUNCEMENT AND INSIDE INFORMATION - ANNOUNCEMENT ON ESTIMATED PROFIT INCREASE FOR THE INTERIM RESULTS OF 2024

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.OVERSEAS REGULATORY ANNOUNCEMENT AND INSIDE INFORMATION ANNOUNCEMENT ON ESTIMATED PROFIT INCREASE FOR THE INTERIM RESULTS OF 2024 This announcement is made pursuant to Part XIVA of the Securities and Futures Ordinance (Chapter 571 Laws of Hong Kong) and Rule 13.09(2) and Rule 13.10B of the Rules Governing the Listing of Securities on The Stock Exchange of Hong Kong Limited.The board of directors (the “Board”) of Aluminum Corporation of China Limited* (the “Company”) and all directors warrant that there are no misrepresentations and misleading statements contained in or material omissions from this announcement and severally and jointly accept full responsibility for the truthfulness accuracy and completeness of the contents of this announcement.IMPORTANT NOTICE: 1. The Company is expected to record a net profit attributable to shareholders of the Company ranging from RMB6.5 billion to RMB7.3 billion for the first half of 2024 representing a year-on-year increase of 90% to 114%. 2. The net profit attributable to shareholders of the Company after non-recurring profit or loss for the first half of 2024 is expected to be ranging from RMB6.4 billion to RMB7.2 billion representing a year-on-year increase of 122% to 150%.– 1 –I. ESTIMATED RESULTS FOR THE PERIOD (I) Period for estimated results From 1 January 2024 to 30 June 2024.(II) Estimated results 1. Based on preliminary calculations the net profit attributable to shareholders of the Company is expected to be ranging from RMB6.5 billion to RMB7.3 billion for the first half of 2024 representing an increase of RMB3.1 billion to RMB3.9 billion as compared with the corresponding period of the preceding year or a year-on-year increase of 90% to 114%. 2. The net profit attributable to shareholders of the Company after non-recurring profit or loss is expected to be ranging from RMB6.4 billion to RMB7.2 billion representing an increase of RMB3.5 billion to RMB4.3 billion as compared with the corresponding period of the preceding year or a year-on-year increase of 122% to 150%. 3. The estimated basic earning per share is expected to be ranging from RMB0.379 to RMB0.426 representing an increase of RMB0.181 to RMB0.228 as compared with the corresponding period of the preceding year or a year-on-year increase of 91% to 115%.(III) The estimated results have not been audited.II. RESULTS FOR THE CORRESPONDING PERIOD OF THE PRECEDING YEAR (I) Net profit attributable to the shareholders of the Company for the first half of 2023: RMB3.4 billion.(II) Net profit attributable to the shareholders of the Company after non-recurring profit and loss: RMB2.9 billion.(III) Basic earning per share: RMB0.198.– 2 –III. MAJOR REASONS FOR THE ESTIMATED PROFIT INCREASE FOR THE PERIOD In the first half of 2024 the Company adhered to the philosophy of operating with best efforts by taking measures such as seizing market opportunities enhancing operational efficiency and tightening cost control resulting in high stable and excellent production of its main products as well as a substantial year-on-year increase in its operating performance.IV. RISK WARNING There is no material uncertainty in respect of the Company which would affect the accuracy of the content of this estimated results announcement.V. OTHER RELEVANT MATTERS The above estimated data are preliminary calculations of the Company only.Finalized details of the financial data of the Company will be officially disclosed in the 2024 interim report of the Company. Investors are advised to be aware of the investment risks involved.Announcement is hereby given.By order of the Board Aluminum Corporation of China Limited* Ge Xiaolei Joint Company Secretary Beijing the PRC 11 July 2024 As at the date of this announcement the members of the Board comprise Mr. Shi Zhirong Mr. Zhu Runzhou Mr. Ou Xiaowu and Mr. Jiang Tao (Executive Directors); Mr. Zhang Jilong and Mr. Chen Pengjun (Non-executive Directors); Mr. Qiu Guanzhou Mr. Yu Jinsong and Ms. Chan Yuen Sau Kelly (Independent Non-executive Directors).* For identification purposes only –3–