X0305 4/A 2012-03-20 2012-03-22 0 0000728387 IsoRay, Inc. ISR 0001359820 Babcock Dwight William 6464 E GRANT ROAD TUCSON AZ 85715 1 1 0 0 CEO Common Stock 2012-03-20 4 P 0 4000 0.5 A 200373 D Common Stock 2012-03-22 4 P 0 4900 0.5275 A 205273 D Common Stock 2012-03-22 4 P 0 100 0.4999 A 205373 D Common Stock 2012-03-22 4 P 0 1000 0.5199 A 206373 D This amendment is being filed to correct the total securities benefically owned in Column 5 from the original Form 4 filing on March 22, 2012. No changes have been made to the reported purchases. This correction was previously filed via Form 4 on April 23, 2012, but the filing was inadvertently filed as a new Form 4 and not as an amendment to the Form 4 filing filed on March 22, 2012. s/ Dwight W. Babcock 2012-05-10