Notice Concerning the Status of Share Repurchase

Date: May 12, 2026

Listed company name: Nitto Denko Corporation Stock exchange listing: Tokyo, Prime Market Code number: 6988

Company representative: Tatsuya Akagi, President Contact person: Yasuhiro Iseyama

Senior Executive Vice President

Director of Corporate Accounting & Finance Division Phone: +81-6-7632-2101

(Share Repurchase under the Provisions of the Articles of Incorporation Pursuant to Article 165, Paragraph 2 of the Companies Act of Japan)

Nitto Denko Corporation announces the status of the share repurchase in accordance with the resolution adopted by the meeting of its Board of Directors on March 30, 2026, pursuant to Article 156 of the Companies Act of Japan as applied pursuant to Article 165, Paragraph 3.

1. Class of shares repurchased: Common stock

2. Number of shares repurchased: 3,373,900 shares

3. Total repurchased amount: JPY 10,999,954,800

4. Method of repurchase: Market Repurchase on the Tokyo Stock Exchange

5. Repurchase period: From April 8, 2026 to April 30, 2026

【Reference】

1. Details of the resolution made by the Board of Directors on March 30, 2026

   1. Class of shares to be repurchased: Common stock

   2. Total number of repurchasable shares: 20,000,000 shares (maximum) (2.97% of the total number of issued shares [excluding treasury shares])

   3. Total repurchase amount: JPY 50,000,000,000 (maximum)

   4. Repurchase period: From April 8, 2026 to August 31, 2026

2. Cumulative total number of shares repurchased pursuant to the above resolution of the Board of Directors (as of April 30, 2026)

   1. Number of shares repurchased: 3,373,900 shares

   2. Total repurchased amount: JPY 10,999,954,800