Mitsui Chemicals : 【Timely Disclosure】Notice Concerning Receipt of Dividend from a Consolidated Subsidiary

May 13, 2026

Company Name: Mitsui Chemicals, Inc. (Prime Market of the Tokyo Stock Exchange, Code: 4183) Representative: Satoshi Ichimura, President & CEO

Contact: Yoshinori Takatama, General Manager, Corporate Communication Division

Telephone: +81(3)-6880-7500

Notice Concerning Receipt of Dividend from a Consolidated Subsidiary

Mitsui Chemicals, Inc. (hereafter "the Company") has received a dividend from its consolidated subsidiary. As this event falls under the requirements for submitting an extraordinary report according to Article 24-5, Paragraph 4 of the Financial Instruments and Exchange Act and Article 19, Paragraph 2, Item 12 of the Cabinet Office Order on Disclosure of Corporate Affairs, the Company announces the details as follows:

1. Overview of the Dividend

   1. Dividend Amount: USD 85 million (JPY 12,484 million, converted at USD 1 = JPY 147.42)

   2. Date of Receipt: September 25, 2025

   3. Name of Consolidated Subsidiary: MITSUI CHEMICALS AMERICA, INC.

2. Impact on Business Performance

The above dividend is recorded as non-operating income in the Company's non-consolidated financial statements for the fiscal year ending March 31, 2026. Since the dividend is from a consolidated subsidiary, it will not affect the consolidated financial results for the fiscal year ending March 31, 2026.

(Note) The Company prepares its non-consolidated financial statements in accordance with Japanese generally accepted accounting principles (J-GAAP).

Note: Please note that the information was originally provided in Japanese. This document has been translated from Japanese into English for the convenience of our stakeholders. If there is any discrepancy, the Japanese version is the official document and is available on our Japanese language website.