Progress on Share Repurchase

For Immediate Release To whom it may concern Mitsui & Co., Ltd. (“Mitsui”) resolved to repurchase its shares pursuant to Article 156 of the Companies Act of Japan, as applied pursuant to Paragraph 3, Article 165 of the Act, at the meeting of the Board of Directors held on August 4, 2026. The progress of this share repurchase is as follows. 1. Progress of share repurchase in September 2026 (1) Clas