Jan. 16, 2026

IR

(Progress of Disclosed Matters) Notice Regarding Determination of Share Exchange Ratio in Simplified Share Exchange between Sumitomo Chemical Co., Ltd. and Tanaka Chemical Corporation

Jan. 8, 2026

Announcements

Sumitomo Chemical to Attend SPIE Photonics West 2026 to Exhibit its Compound Semiconductor Products and Present an Invited Talk

Jan. 5, 2026

Other

Summary of the New Year's Message from President Nobuaki Mito

Dec. 24, 2025

Business & Products

Mitsui Chemicals, Idemitsu Kosan, and Sumitomo Chemical Concluded a Definitive Agreement for the Business Integration of Sumitomo Chemical's PP and LLDPE Businesses into Prime Polymer

Dec. 24, 2025

IR

Conclusion of Agreement on Integration of Domestic Polyolefin Business (PP, LLDPE) through Company Split (Simplified Absorption-type Split)

Nov. 20, 2025

Business & Products

Sumitomo Chemical Reaches Agreement to Acquire Taiwanese Semiconductor Process Chemicals Company
Aims for Further Business Expansion through Acquiring New Bases in Taiwan and the US

Nov. 13, 2025

Business & Products

Sumitomo Chemical to Restructure Lithium-Ion Secondary Battery Separator Business

Nov. 4, 2025

IR

Notice Concerning Share of Loss of Investments Accounted for Using the Equity Method and Finance Income (Foreign Exchange Gain)

Nov. 4, 2025

IR

Sumitomo Chemical Announces Variances between its Financial Forecast and Actual Results for the Second Quarter (Interim Period) of the Full Year Ending March 31, 2026, and Revisions to its Financial Forecast for the Full Year Ending March 31, 2026

Nov. 4, 2025

IR

Summary of Consolidated Financial Results for Second Quarter (Interim Period) Fiscal Year 2025

Oct. 31, 2025

IR

Integrated Report 2025 and Sustainabillity Report 2025 have been published

Oct. 28, 2025

IR

Notice Regarding Execution of a Share Exchange Agreement (Simplified Share Exchange) to Make Tanaka Chemical Corporation a Wholly-Owned Subsidiary of Sumitomo Chemical Co., Ltd.

Oct. 22, 2025

IR

(Progress of Disclosure Matters) Notice Regarding the Impact on Results of Sale and Other Transactions of Shares in Petro Rabigh, an Equity-Method Affiliate

Oct. 20, 2025

Business & Products

Sumitomo Chemical to Reorganize its U.S. Group Companies in the Agro & Life Solutions Sector and Establish a Global Hub for its Biorational Business

Sep. 26, 2025

IR

"Investors' Meeting for the Current Priority Management Issues and Business Strategy" has been released.

Sep. 16, 2025

R&D

Sumitomo Chemical Wins New Office Promotion Award at the 38th Nikkei New Office Awards for New Research Facility at Its Chiba Site

Sep. 10, 2025

Business & Products

Mitsui Chemicals, Idemitsu Kosan, and Sumitomo Chemical Enter Into MOU on Integration of Sumitomo Chemical's PP and LLDPE Businesses into Prime Polymer, Aiming to Strengthen the Competitiveness of the Domestic Polyolefin Business

Sep. 1, 2025

Announcements

Investors' Handbook 2025 has been published

Sep. 1, 2025

IR

(Progress of Disclosure Matters) Notice Regarding Sale of a Portion of the Shares Sumitomo Chemical Holds in Petro Rabigh and Other Related Matters

Aug. 27, 2025

Announcements

Sumitomo Chemical to Attend SEMICON India 2025