X0306 4 2022-06-28 0000811212 ThermoGenesis Holdings, Inc. THMO 0001669192 Xu Xiaochun 2711 CITRUS ROAD RANCHO CORDOVA CA 95742 1 1 1 CEO 0001738401 Boyalife Group, Inc. 2453 S. ARCHER AVE. SUITE B CHICAGO IL 60616 1 0001738415 Boyalife Asset Holding II, Inc. 2453 S. ARCHER AVE. SUITE B CHICAGO IL 60616 1 Common Stock 2022-06-28 4 C 0 10552234 0.2843 A 12281091 I Held by Boyalife Asset Holding II, Inc. Second Amended and Restated Convertible Note 0.2843 2022-06-28 4 C 0 3000000 D 2018-04-16 2023-03-06 Common Stock 10552234 7700000 I Held by Boyalife Asset Holding II, Inc. On June 28, 2022, Boyalife Asset Holding II, Inc. converted an aggregate of $3,000,000 of outstanding principal and interest under a Second Amended and Restated Convertible Promissory Note issued by Issuer in April 2018. After giving effect to the conversion, as of the date of this Form 4, there was $7,000,000 in principal and approximately $700,000 in accrued interest outstanding under the Convertible Promissory Note, all of which is convertible at a current conversion price of $0.2843 per share, subject to downward adjustment in the event that the Issuer issues shares of common stock at a lower price. Boyalife Asset Holding II, Inc. is 100% owned by Boyalife Group, Inc., which is 100% owned by Dr. Xiaochun Xu. /s/ Xiaochun Xu 2022-06-30