[Translation]
NOTICE: The following report is an English Translation of the Japanese-language original. In the event of any discrepancy between this translated document and the Japanese original, the original shall prevail.
February 10, 2026
To whom it may concern,
Company name: SUMCO Corporation Representative: Mayuki Hashimoto, Representative Director
CEO & Chairman of the Board (Code: 3436, TSE Prime Market) Contact: Takayuki Komori,
General Manager of Public Relations & IR Department
(Tel: +81-3-5444-3915)
Announcement regarding Changes in Personnel AffairsThe Company hereby announces that the board of directors resolved at its meeting held today to make the following changes in the personnel affairs.
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Reason for the Change
To strengthen the management structure
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Personnel Affairs of Directors
(To be referred to General Meeting of Shareholders scheduled for March 27, 2026)
＜New＞ ＜Current＞
・Naruya Hirota Representative Director, Executive Vice President
Executive Vice President
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Biography of New Representative Director, Executive Vice President
Name (Date of birth)
Career summary
Naruya Hirota (February 6, 1961)
Number of the Company's common shares held
4,383 shares
Apr. 1985 Joined Mitsubishi Metal Corporation (the current Mitsubishi Materials Corporation)
Feb. 2011 General Manager of Epitaxial Engineering Dept., Technology Div., the Company
Mar. 2017 Executive Officer,
General Manager of Epitaxial Engineering Dept., Technology Div., the Company
May. 2018 Executive Officer,
Deputy General Manager of Technology Div., the Company
Jan. 2020 Executive Officer,
General Manager of AI Promotion Div. and Deputy General Manager of Technology Div., the Company
Mar. 2021 Managing Executive Officer,
Deputy General Manager of Technology Div., the Company
Jan. 2022 Managing Executive Officer,
General Manager of Planning & Construction Div., the Company
Mar. 2022 Senior Managing Executive Officer,
General Manager of Planning & Construction Div., the Company
Mar. 2023 Executive Vice President,
General Manager of Planning & Construction Div., the Company (present post)
- Date of Change
March 27, 2026