Mitsui & Co., Ltd. Notification of Progress and End of Stock Repurchase At the meeting of the Board of Directors held on February 24, 2021, Mitsui & Co., Ltd. (“Mitsui”) resolved to repurchase its stock in accordance with Article 156 and Article 165(3) of the Companies Act of Japan. Mitsui today reported the progress of stock repurchase and announced the end of the stock repurchase pursuant to the resolution above with the following details: Progress of stock repurchase: (2) Number of shares repurchased: 10,776,800 shares (3) Total amount: 24,632,241,699 yen (4) Period: From April 1, 2021 to April 26, 2021 (5) Repurchase method: Auction market on Tokyo Stock Exchange [Reference] 1.Details of stock repurchase resolved at the meeting of the Board of Directors held on February 24, 2021.