IsoRay, Inc. to Be Listed on the AMEX; Shares to Trade Under the Symbol ISR

RICHLAND, Wash.--(BUSINESS WIRE)--IsoRay, Inc. (OTCBB:ISRY) today announced that its common stock has been approved for listing on the American Stock Exchange ® (AMEX®). IsoRay’s common stock is expected to commence listing on the American Stock Exchange under the ticker symbol ISR on Thursday, April 19, 2007.