Notice Regarding Introduction of Long-Term Incentive Stock Compensation Plan for Employees of U.S. Subsidiary Deciphera

Overview of the Introduction of the Long-Term Incentive Stock Compensation Plan

Ono Pharmaceutical Co., Ltd. resolved at the Board of Directors meeting on March 5, 2026, to implement a long-term incentive stock compensation plan (ESOP Trust) for employees of its U.S. subsidiary Deciphera Pharmaceuticals, Inc. The plan aims to enhance employee engagement and increase corporate value over the medium to long term. Under this plan, the ESOP Trust will acquire treasury stock which will be granted to employees, enabling them to benefit economically from potential stock price appreciation. Additionally, voting rights will be exercised in a manner reflecting the employees’ intentions.

Impact on Shareholders and Future Outlook

In conjunction with the introduction of this plan, the Company will dispose of 8,398,300 shares of treasury stock (equivalent to JPY 20,454 million) to the ESOP Trust out of 28,785,143 shares of treasury stock held as of September 30, 2025. The trust period is scheduled from March 23, 2026 to March 31, 2029. Upon the trust’s termination, the Company will decide on either cancelling the remaining shares or continuing the plan. This initiative is expected to heighten employees’ participation awareness in management and contribute to enhancing corporate value.