Notice Regarding Merger Between Wholly-Owned Consolidated Subsidiaries

Zeon Corporation (Headquarters: Chiyoda-ku, Tokyo, President & CEO: Tetsuya Toyoshima, hereinafter 'the Company') hereby announces that it has decided to conduct an absorption-type merger, with Zeon North Corporation, a consolidated subsidiary of the Company, as the surviving company, and Zeon Yamaguchi Corporation, also a consolidated subsidiary, as the dissolving company, effective July 1, 2026.

1. Purpose of the Merger By integrating the two companies, which possess similar operations in certain business areas, the Company aims to maximize synergy through business consolidation, build a structure to provide higher quality services, and strive for further business growth and new value creation centered on the engineering business.

2. Overview of the Merger (1) Method of Merger An absorption-type merger method with Zeon North as the surviving company and Zeon Yamaguchi as the dissolving company.

(2) Merger Schedule - Date of conclusion of merger agreement: December 23, 2025 - Effective date of merger: July 1, 2026 (Scheduled)

3. Overview of Merging Parties (1) Trade Name - Surviving Company: Zeon North Corporation - Dissolving Company: Zeon Yamaguchi Corporation

(2) Location of Head Office - Surviving Company: 1061-2 Yonejima, Takaoka City, Toyama Prefecture - Dissolving Company: 2-1 Nachi-cho, Shunan City, Yamaguchi Prefecture

(3) Representative - Surviving Company: Hajime Matsuzaki, President & Representative Director - Dissolving Company: Hiroshi Kasamoto, Representative Director

(4) Capital - Surviving Company: 100 million yen (100% owned by the Company) - Dissolving Company: 50 million yen (100% owned by the Company)

(5) Business Description - Surviving Company: Design, procurement, construction, and maintenance of various plants and aluminum melting facilities; industrial chemicals, equipment