Amended Securities Report – 99th Fiscal Period (2025/04/01–2026/03/31)

Mitsubishi Gas Chemical Company, Inc. Amended Securities Report – 99th Fiscal Period (2025/04/01–2026/03/31)

This report is an amended securities report submitted by Mitsubishi Gas Chemical Company, Inc. in accordance with the Financial Instruments and Exchange Act, containing financial condition and performance information for the 99th fiscal period (April 1, 2025 to March 31, 2026). The company emphasizes accurate and timely disclosure from the standpoint of regulatory compliance and investor protection, and the submission of this amended report is part of that commitment. The primary reasons for the amendment include a review of accounting treatments and additions or corrections to disclosed items, all aimed at ensuring transparency for shareholders and investors. Going forward, the company will continue to strengthen governance and maintain a reliable financial reporting system.