On June 12, 2022, Debra Donaghy resigned from the Board of Directors of ThermoGenesis Holdings, Inc. (the “Company”). At the time of Ms. Donaghy's resignation, Ms. Donaghy served as the Chairperson of the Audit Committee and a member of the Compensation Committee. Ms. Donaghy's decision to resign did not involve any disagreements with the Company, the Company's management, or the Board of Directors on any matter relating to the Company's operations, policies, or practices.

As a result of Ms. Donaghy's resignation, the Board appointed Dr. Jeff Thomis to serve as Interim Audit Committee Chairman. Dr. Russell Medford, an independent member of the Board is also a member of the Audit Committee. The Company has commenced a search for a replacement independent director to serve on the Board and Audit Committee and expects to fill the vacancy shortly.