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Table of Contents or UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON , D.C. 20549 ANNUAL REPORT PURSUANT TO SECTION 13 OR 15 ( D ) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended June 30 , 2021 TRANSITION REPORT PURSUANT TO SECTION 13 OR 15 ( D ) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from Delaware ( State of incorporation ) FORM 10 - K to Title of each class Common Stock , $ 0.001 par value Commission File No. 001-33407 ISORAY , INC . ( Exact name of registrant as specified in its charter ) 350 Hills St. , Suite 106 Richland , Washington ( Address of principal executive offices ) 41-1458152 ( I.R.S. Employer Identification No. ) 99354 ( Zip code ) Registrant's telephone number , including area code : ( 509 ) 375-1202 Securities registered pursuant to Section 12 ( b ) of the Act Trading Symbol ( s ) . ISR Name of exchange on which registered NYSE American Securities registered pursuant to Section 12 ( g ) the Act : None Indicate by check mark if the registrant is a well - known seasoned issuer , as defined in Rule 405 of the Securities Act . Yes Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15 ( d ) of the Act . Yes No No Indicate by check mark whether the registrant ( 1 ) has filed all reports required to be filed by Section 13 or 15 ( d ) of the Exchange Act of 1934 during the preceding 12 months ( or for such shorter period that the registrant was required to file such reports ) , and ( 2 ) has been subject to such filing requirements for the past 90 days . Yes No Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S - T ( § 232.405 of this chapter ) during the preceding 12 months ( or for such shorter period that the registrant was required to submit such files ) . Yes > No