#DaiichiSankyo

During the period from December 1 to December 31, 2025, Daiichi Sankyo Company, Limited did not conduct any treasury stock acquisitions, with the number of shares acquired being 0 shares and the total acquisition cost being 0 yen.

Daiichi Sankyo held Science & Technology Day 2025 on December 16, 2025, where they announced advances in DXd ADC technology and growth strategies for their oncology business.