Notice Regarding the Status of Treasury Stock Acquisition and Completion of Acquisition (Acquisition of Treasury Stock Based on the Provision of Article 165, Paragraph 2 of the Companies Act)

Overview of Capital Policy

Daiichi Sankyo Company, Limited executed treasury stock acquisitions based on the Board of Directors resolution dated April 25, 2025, pursuant to the provision of Article 165, Paragraph 2 of the Companies Act. The targets were the company's common shares, with a maximum acquisition limit of 80 million shares and a total acquisition limit of up to 200 billion yen. As of March 24, 2026, cumulative shares acquired totaled 31,457,200 shares, with a total acquisition price of 91,846,787,000 yen. During the current acquisition period from March 1 to March 24, 2026, 13,854,700 shares were acquired for 39,997,547,100 yen, representing only a portion of the authorized acquisition limit.

Shareholder Returns and Future Policy

The Company conducted flexible treasury stock acquisitions by comprehensively considering the stock price level and investment opportunities for business growth. Going forward, the Company will strive to maximize medium- to long-term shareholder value by balancing shareholder returns with growth investments and executing optimal allocation of management resources. With the completion of this acquisition, the treasury stock acquisition based on the Board of Directors resolution has been concluded.