News Release tag:www.smm.co.jp,2021-01-08:/en/5 2026-08-10T02:34:38Z Consolidated Financial Results for the First Quarter Ended June 30, 2026 tag:www.smm.co.jp,2026:/en//5.2157 2026-08-10T02:08:03Z 2026-08-10T02:34:38Z Please check the below PDF file for deta... Please check the below PDF file for details.

]]> Notice regarding Revisions Made to Consolidated Operating Results Forecast tag:www.smm.co.jp,2026:/en//5.2156 2026-08-10T02:06:21Z 2026-08-10T02:10:27Z Please check the below PDF file for deta... Please check the below PDF file for details.

]]> Explanation Materials for Conference Call of 1st Quarter FY2026 tag:www.smm.co.jp,2026:/en//5.2155 2026-08-10T02:05:54Z 2026-08-10T02:06:17Z Updated Corporate Governance Report tag:www.smm.co.jp,2026:/en//5.2151 2026-08-07T04:18:20Z 2026-08-07T04:19:28Z Notice regarding Completion of Payment for the Disposal of Treasury Share as Restricted Stock Compensation tag:www.smm.co.jp,2026:/en//5.2149 2026-07-24T00:15:06Z 2026-07-24T00:16:39Z Please check the below PDF file for deta... Please check the below PDF file for details.

]]> Extraordinary Report tag:www.smm.co.jp,2026:/en//5.2145 2026-07-01T01:30:32Z 2026-07-01T01:31:50Z Notice of Resolutions at the 101st Ordinary General Meeting of Shareholders tag:www.smm.co.jp,2026:/en//5.2142 2026-06-25T00:20:56Z 2026-06-25T00:22:00Z Notice regarding the Disposal of Treasury Share for Restricted Stock Compensation tag:www.smm.co.jp,2026:/en//5.2141 2026-06-25T00:19:24Z 2026-06-25T00:20:52Z Please check the below PDF file for deta... Please check the below PDF file for details.

]]> Updated Corporate Governance Report tag:www.smm.co.jp,2026:/en//5.2136 2026-06-23T07:06:50Z 2026-06-23T07:07:38Z GRANOPT to Triple Faraday Rotator Production Capacity by Fiscal 2027 tag:www.smm.co.jp,2026:/en//5.2135 2026-06-22T00:29:32Z 2026-06-22T01:37:05Z Sumitomo Metal Mining Co., Ltd. (TSE: 57... Sumitomo Metal Mining Co., Ltd. (TSE: 5713) and Mitsubishi Gas Chemical Company, Inc. (TSE: 4182) are pleased to announce that GRANOPT Co., Ltd., their joint venture, has decided to triple its production capacity for Faraday rotators by the fiscal year ending March 31, 2028 (FY2027) compared with FY2025.

Please check the below PDF file for details.

]]> Sumitomo Metal Mining Enhances Visibility in the Copper Cathode Supply Chain tag:www.smm.co.jp,2026:/en//5.2133 2026-06-19T00:17:50Z 2026-06-19T00:18:54Z Tokyo, Japan - Sumitomo Metal Mining Co.... Tokyo, Japan - Sumitomo Metal Mining Co., Ltd. (TSE: 5713) has adopted MineHub platform, a supply chain visibility platform provided by MineHub Technologies Inc., a Canada-based company, for the sale of copper cathodes produced at Sumitomo Metal Mining's Toyo Smelter & Refinery in Saijo, Ehime Prefecture, Japan.

Please check the below PDF file for details.

]]> Position and Policy on Lowering Investment Unit tag:www.smm.co.jp,2026:/en//5.2131 2026-06-18T04:19:19Z 2026-06-18T04:19:59Z Please check the below PDF file for deta... Please check the below PDF file for details.

]]> Sumitomo Metal Mining Wins Silver Cube at the 105th ADC Annual Awards tag:www.smm.co.jp,2026:/en//5.2129 2026-06-16T00:46:30Z 2026-06-16T00:47:24Z Tokyo, Japan - Sumitomo Metal Mining Co.... Tokyo, Japan - Sumitomo Metal Mining Co., Ltd. (TSE: 5713) announces that HOPE WEAR, a concept model of the company's solar-smart material technology SOLAMENT™, has won a Silver Cube in the Product Design category at the 105th ADC Annual Awards. Founded in 1920, the ADC Annual Awards is the world's longest continuously running awards program recognizing global excellence in craft and innovation in all forms of advertising and design.

Please check the below PDF file for details.

]]> Notice regarding the Status and Completion of Repurchase of Own Shares, and Cancellation of Own Shares tag:www.smm.co.jp,2026:/en//5.2126 2026-06-01T03:24:27Z 2026-06-01T03:25:18Z Please check the below PDF file for deta... Please check the below PDF file for details.

]]> Convocation Notice of the 101st Ordinary General Meeting of Shareholders tag:www.smm.co.jp,2026:/en//5.2124 2026-05-29T00:54:29Z 2026-05-29T02:19:24Z