On March 8, 2024, Haihong Zhu, the Chief Operating Officer and a director of ThermoGenesis Holdings, Inc., notified the Board of Directors of the Company that she has decided to resign from the Board effective March 8, 2024. Ms. Zhu?s resignation is not due to any disagreements with the Company or its management on any matter relating to the Company?s operations, policies, or practices. Ms. Zhu will continue to serve as the Company?s Chief Operating Officer and as a director and executive officer of the Company?s ThermoGenesis Corp.

subsidiary.