X0305 4/A 2011-11-17 2011-11-22 0 0000728387 IsoRay, Inc. ISR 0001359820 Babcock Dwight William 6464 E GRANT ROAD TUCSON AZ 85715 1 1 0 0 CEO Common Stock 2011-11-17 4 P 0 2500 0.77 A 163773 D Common Stock 2011-11-18 4 P 0 500 0.83 A 164273 D Common Stock 2011-11-21 4 P 0 400 0.84 A 164673 D Common Stock 2011-11-21 4 P 0 1100 0.8499 A 165773 D This amendment is being filed to correct the total securities benefically owned in Column 5 from the original Form 4 filing on November 22, 2011. 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 November 22, 2011. s/ Dwight W. Babcock 2012-05-10