May. 15, 2026

IR

Notice Concerning Variances between the Non-consolidated Financial Results in a Consolidated Subsidiary (Taoka Chemical Co., Ltd.) for Fiscal Year 2025 and 2024

May. 15, 2026

IR

"Investors' Meeting for FY2025 Financial Results, Management Priorities and Business Strategies" has been released.

May. 14, 2026

IR

Notice Concerning Finance Income (Foreign Exchange Gain)

May. 14, 2026

IR

Announcement of Reversal of Loss on a Write-down of Investment in Affiliates in Non-consolidated Financial Statements

May. 14, 2026

IR

Summary of Consolidated Financial Results for Fiscal Year 2025

May. 13, 2026

IR

Notice Concerning Variances between the Non-consolidated Financial Results in a Consolidated Subsidiary (Sumitomo Pharma Co., Ltd.) for Fiscal Year 2025 and 2024

May. 13, 2026

IR

Reduction in the Amount of Capital Reserves That Will Increase upon the Share Exchange and Transfer of the Reduced Amount to Other Capital Surplus

May. 13, 2026

IR

Notice Regarding Execution of Share Exchange Agreement (Simplified Share Exchange) to Make Koei Chemical Company, Limited a Wholly Owned Subsidiary of Sumitomo Chemical Co., Ltd.

May. 7, 2026

Business & Products

Sumitomo Chemical to Expand its High-Purity Alumina Portfolio to Accelerate Business Growth in the Advanced Semiconductor Market

Apr. 24, 2026

Business & Products

Mitsui Chemicals, Idemitsu Kosan, and Sumitomo Chemical Receive Japan Fair Trade Commission Clearance for the Integration of Sumitomo Chemical's PP and LLDPE Businesses into Prime Polymer

Apr. 9, 2026

Business & Products

Sumitomo Chemical to Establish New Technology Center for Photoresists for Advanced Semiconductors at Its Osaka Works

Apr. 8, 2026

IR

Notice Regarding the Issuance of New Shares by a Subsidiary

Apr. 1, 2026

IR

(Progress of Disclosure Matters) Notice of Execution of Absorption-Type Company Split Agreement for Integration of Polyolefin (PP and LLDPE) Business in Japan (Simple Absorption-Type Company Split)

Mar. 6, 2026

IR

Notice Regarding a Subsidiary Obtaining Manufacturing and Marketing Authorization for iPS Cell-Derived Product "AMCHEPRY^®" for the Treatment of Parkinson's Disease

Mar. 2, 2026

IR

Notice Regarding the Filing of a Shelf Registration for the Issuance of New Shares by a Subsidiary

Mar. 2, 2026

Organization

Sumitomo Chemical Announces Reorganization

Feb. 26, 2026

Business & Products

The Sumitomo Chemical Group to Integrate French Subsidiaries to Further Strengthen Crop Protection Business in Europe

Feb. 13, 2026

Other

Sumitomo Chemical Participates in GCNJ Summit 2026: Fairness at Work and Home
The Company Endorses GCNJ's Vision to Achieve Fair Work Environment and Announces Its Action Plan

Feb. 5, 2026

Business & Products

Lummus and Sumitomo Chemical Announce Commercial Availability of PMMA Chemical Recycling Technology
Advanced technology enables closed loop PMMA and lower emissions for producers

Feb. 3, 2026

IR

Announcement of Extraordinary Loss in Non-consolidated Financial Statements

Feb. 3, 2026

IR

Notice Concerning Share of Loss of Investments Accounted for Using the Equity Method

Feb. 3, 2026

IR

Sumitomo Chemical Announces Revisions to Its Financial Forecast and Projected Dividend for the Full Year Ending March 31, 2026

Feb. 3, 2026

IR

Summary of Consolidated Financial Results for Third Quarter Fiscal Year 2025

Jan. 22, 2026

R&D

Sumitomo Chemical Receives Clarivate Top 100 Global Innovators 2026 Award
Selected as One of the World's Top 100 Innovative Companies and Institutions for Five Consecutive Years

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. 5, 2026

Other

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