Notice Regarding Change in the Schedule of the Fiscal Year Ending March 2026 Earnings Announcement

Regarding the Change in Earnings Announcement Schedule

Daiichi Sankyo Company, Limited announced it will postpone the earnings announcement for the fiscal year ending March 2026 from the originally scheduled April 27, 2026 to May 11, 2026. The primary reason for the delay is that, in light of the rapid changes in the business environment and the review of supply plans related to oncology product portfolio and developmental products, additional consideration is required to reasonably estimate the amount of provision for loss compensation related to contracts with manufacturing subcontractors.

Change in Mid-term Management Plan Announcement Date and Future Outlook

The announcement of the 6th Mid-term Management Plan was also rescheduled from the originally planned May 19, 2026 to May 11, 2026, coinciding with the earnings announcement date. This decision was made as the best approach to provide a comprehensive explanation to support investment decisions in the financial markets. The impact on operating results is currently under review and, if any disclosure-worthy matters arise, the company intends to promptly notify stakeholders.