Sumitomo Electric Industries : Notice Regarding Share Split 20260511

To whom it may concern,

May 12, 2026

Company: Sumitomo Electric Industries, Ltd.

Representative: Osamu Inoue, President and COO (Code: 5802, Tokyo Stock Exchange, Nagoya Stock Exchange, and Fukuoka Stock Exchange)

Contact: Maki Tanaka, General Manager, Public Relations Department

Tel: +81-6-6220-4141

Sumitomo Electric Industries, Ltd. (President: Osamu Inoue; hereinafter, the "Company") resolved at the Board of Directors meeting held on May 12, 2026, to conduct a stock split and to partially amend its Articles of Incorporation as follows.

1. Overview of Stock Split

   1. Purpose of Stock Split

      By lowering the amount per investment unit of stock, Company will allow for investing to become more accessible for our shareholders, as well as enable further expansion of our investor base.

   2. Method of Stock Split

      Each share of common stock owned by shareholders listed or recorded in the register of shareholders on the record date of June 30, 2026 will be split into four shares.

   3. Number of shares to be increased by Stock Split

      Total number of issued shares before Stock Split	793,940,571
      Number of shares to be increased by Stock Split	2,381,821,713
      Total number of issued shares after Stock Split	3,175,762,284
      Total number of issuable shares after Stock Split	12,000,000,000

   4. Schedule of Stock Split

      Public notice of record date (scheduled)	June 15, 2026
      Record date	June 30, 2026
      Effective date	July 1, 2026

   5. Others

      1. Dividends

         Assuming the stock split will be effective on July 1, 2026, the year-end dividend for the fiscal year ended March 31, 2026 with the record date of March 31, 2026 will be applicable to the common stock outstanding before the stock split.

      2. Change in Amount of Stated Capital

   There will be no change in the amount of stated capital as a result of Stock Split.

2. Partial Amendment to the Articles of Incorporation

1. Reason for Amendment

   In accordance with Stock Split, by resolution of the Board of Directors pursuant to Article 184 (2) of the Companies Act of Japan, Company will make the following partial amendment to the Articles of Incorporation, effective from July 1, 2026.

2. Details of Amendment (Amendment portion is underlined.)

   Current Articles of Incorporation	Amendments to the Articles of Incorporation
   Article 6. (Total Number of Shares Authorized to be Issued) The total number of shares authorized to be issued by the Company shall be 3,000,000,000 shares.	Article 6. (Total Number of Shares Authorized to be Issued) The total number of shares authorized to be issued by the Company shall be 12,000,000,000 shares.

3. Schedule of Amendment