-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 BPtsyqiYtnFdRez/1Bn2hMcSvw/EibBoLuGA/iv9LIQBXNSU/QBmHMmrZbjhWpN1
 zvUN1w0H/liNk9ovXuxuNw==

<SEC-DOCUMENT>0001342647-06-000006.txt : 20060810
<SEC-HEADER>0001342647-06-000006.hdr.sgml : 20060810
<ACCEPTANCE-DATETIME>20060810172932
ACCESSION NUMBER:		0001342647-06-000006
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20060808
FILED AS OF DATE:		20060810
DATE AS OF CHANGE:		20060810

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Swanberg David
		CENTRAL INDEX KEY:			0001333199

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-14247
		FILM NUMBER:		061022375

	BUSINESS ADDRESS:	
		BUSINESS PHONE:		509-375-1202

	MAIL ADDRESS:	
		STREET 1:		350 HILLS STREET
		STREET 2:		SUITE 106
		CITY:			RICHLAND
		STATE:			WA
		ZIP:			99354

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			IsoRay, Inc.
		CENTRAL INDEX KEY:			0000728387
		STANDARD INDUSTRIAL CLASSIFICATION:	SURGICAL & MEDICAL INSTRUMENTS & APPARATUS [3841]
		IRS NUMBER:				411458152
		STATE OF INCORPORATION:			MN
		FISCAL YEAR END:			0930

	BUSINESS ADDRESS:	
		STREET 1:		350 HILLS STREET,
		STREET 2:		SUITE 106
		CITY:			RICHLAND
		STATE:			WA
		ZIP:			99354
		BUSINESS PHONE:		(509) 375-1202

	MAIL ADDRESS:	
		STREET 1:		350 HILLS STREET,
		STREET 2:		SUITE 106
		CITY:			RICHLAND
		STATE:			WA
		ZIP:			99354

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	CENTURY PARK PICTURES CORP
		DATE OF NAME CHANGE:	19920703
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>primary_doc.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2006-08-08</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000728387</issuerCik>
        <issuerName>IsoRay, Inc.</issuerName>
        <issuerTradingSymbol>ISRY.OB</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001333199</rptOwnerCik>
            <rptOwnerName>Swanberg David</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>350 HILLS STREET</rptOwnerStreet1>
            <rptOwnerStreet2>SUITE 106</rptOwnerStreet2>
            <rptOwnerCity>RICHLAND</rptOwnerCity>
            <rptOwnerState>WA</rptOwnerState>
            <rptOwnerZipCode>99354</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>EVP Operations &amp; Secretary</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>stock option (right to buy)</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>3.25</value>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2006-08-08</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>50000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <footnoteId id="F1"/>
            </exerciseDate>
            <expirationDate>
                <value>2016-08-08</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>common stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>50000</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>200000</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">16,666 stock options vest 08/08/07, 16,667 stock options vest 08/08/08, 16,667 stock options vest 08/08/09.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/David Swanberg</signatureName>
        <signatureDate>2006-08-09</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
-----END PRIVACY-ENHANCED MESSAGE-----
