X0303 4 2009-05-12 0 0000811212 THERMOGENESIS CORP KOOL 0001461906 ENGLE J MELVILLE 2711 CITRUS RD. RANCHO CORDOVA CA 95742 0 1 0 0 CEO Common Stock 2009-05-12 4 P 0 100000 0.55 A 100000 D The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $0.55 to $0.56. The Reporting Person has provided to the Issuer, and undertakes to provide to any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the range set forth in this footnote. /s/ J. Melville Engle 2009-05-12