Notice concerning Status of Repurchase of the Company’s Own Shares

For Immediate Release

Listed company name: SANKYO CO., LTD.

Representative: Toshio Ogura

President & CEO & COO (Code:6417, TSE Prime Market)

Contact: Masahiro Akaishi

Executive Operating Officer Head of Administration Div. TEL.: +81-3-5778-7777

SANKYO CO., LTD. (the "Company") hereby announces status of repurchase of the Company's own shares pursuant to Article 459, Paragraph 1 of the Company Act and Article 38 of the Company's Articles of Incorporation. Details are as follows.

1. Type of shares repurchased: Common stock

2. Aggregate number of shares repurchased: 2,700,600 shares

3. Aggregate amount of repurchase cost: 7,160,584,200 yen

4. Period of repurchase: From November 1, 2025 to November 30, 2025 (on a contract basis)

5. Method of repurchase: Open-market purchase on the Tokyo Stock Exchange

(Reference)

1. Details of the resolution of the Board of Directors' meeting, held on May 12, 2025, regarding repurchase of own shares

   1. Type of shares to be repurchased: Common stock

   2. Aggregate number of shares eligible for repurchase: Up to 30 million shares

      (13.66% of the total number of shares issued (excluding treasury stock))

   3. Aggregate amount of repurchase cost: Up to 60 billion yen

   4. Period of repurchase: From May 13, 2025 to March 31, 2026

   5. Method of repurchase: Open market purchase on the Tokyo Stock Exchange

2. Cumulative number of own shares repurchased in accordance with the resolution of the abovementioned Board of Directors' meeting (As of November 30, 2025)

1. Aggregate number of shares repurchased: 22,214,700 shares

2. Aggregate amount of repurchase cost: 59,554,919,950 yen

This material is an English translation of Japanese announcement made on December 1, 2025. Although the Company intended to faithfully translate the Japanese document into English, the accuracy and correctness of this translation are not guaranteed.

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