X0305 4 2012-02-07 0 0000728387 IsoRay, Inc. ISR 0001359820 Babcock Dwight William 6464 E GRANT ROAD TUCSON AZ 85715 1 1 0 0 CEO Common Stock 2011-02-17 4 P 0 10000 0.54 A 195873 D Common Stock 2012-02-21 4 P 0 500 0.51 A 196373 D This amendment is being filed to correct the total securities beneficially owned in Column 5. No changes have been made to the reported purchases. Dwight W. Babcock 2012-04-23