16 December 2025

Sumitomo Electric Industries, Ltd. (President: Osamu Inoue; hereinafter, the “Company”) resolved at the Board of Directors meeting held on October 30, 2025, to acquire common stock of Sumitomo Riko Company Limited (President: Kazushi Shimizu; hereinafter, “SRK”) through a tender offer (the “Tender Offer”) under the Financial Instruments and Exchange Act (Act No. 25 of 1948, as amended), and has been implementing the Tender Offer since October 31, 2025. The Company hereby announces that the Tender Offer concluded on December 15, 2025.

As the total number of shares tendered in the Tender Offer (the “Tendered Shares”) exceeded the minimum number of shares to be purchased, the Company will acquire all of the Tendered Shares, as stated in the public notice of commencement of the Tender Offer and the Tender Offer Statement, and intends to proceed with the procedures for acquiring all of SRK’s common stock.

In addition, as announced on October 30, 2025, regarding Sumitomo Densetsu Co., Ltd. (President: Makoto Tani; hereinafter, “SEM”), Daiwa House Industry Co., Ltd. (President: Hirotsugu Otomo; hereinafter, “Daiwa House”) commenced a tender offer on October 31, 2025. The Company entered into a Non-Tender Agreement with Daiwa House, under which the Company did not participate in the tender offer. Daiwa House completed the tender offer on December 15, 2025.

Following the completion of the squeeze-out procedures, the Company will transfer all shares of SEM held by the Company through the acquisition of treasury shares by SEM.