<SEC-DOCUMENT>0001023731-18-000037.txt : 20180924
<SEC-HEADER>0001023731-18-000037.hdr.sgml : 20180924
<ACCEPTANCE-DATETIME>20180924184051
ACCESSION NUMBER:		0001023731-18-000037
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20180920
FILED AS OF DATE:		20180924
DATE AS OF CHANGE:		20180924

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Hakeman Darren J.
		CENTRAL INDEX KEY:			0001586614

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-38312
		FILM NUMBER:		181084368

	MAIL ADDRESS:	
		STREET 1:		2125 O'NEL DRIVE
		CITY:			SAN JOSE
		STATE:			CA
		ZIP:			95131

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			8X8 INC /DE/
		CENTRAL INDEX KEY:			0001023731
		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-COMPUTER PROCESSING & DATA PREPARATION [7374]
		IRS NUMBER:				770142404
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			0331

	BUSINESS ADDRESS:	
		STREET 1:		2125 O'NEL DRIVE
		CITY:			SAN JOSE
		STATE:			CA
		ZIP:			95131
		BUSINESS PHONE:		4087271885

	MAIL ADDRESS:	
		STREET 1:		2125 O'NEL DRIVE
		CITY:			SAN JOSE
		STATE:			CA
		ZIP:			95131

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	NETERGY NETWORKS INC
		DATE OF NAME CHANGE:	20000912

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	8X8 INC
		DATE OF NAME CHANGE:	19961023
</SEC-HEADER>
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<TYPE>4
<SEQUENCE>1
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        </derivativeTransaction>
        <derivativeTransaction>
            <securityTitle>
                <value>Restricted Stock Unit</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <footnoteId id="F6"/>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2018-09-22</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>J</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F9"/>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>7010</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <value>2018-09-22</value>
            </exerciseDate>
            <expirationDate>
                <value>2018-09-22</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>7010</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>93339</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
        <derivativeTransaction>
            <securityTitle>
                <value>Restricted Stock Unit</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <footnoteId id="F6"/>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2018-09-22</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>M</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>14020</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <footnoteId id="F9"/>
            </exerciseDate>
            <expirationDate>
                <value>2018-09-22</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>14020</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>79319</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">6,448 Restricted Stock Units became fully vested and have been converted to Common Stock.</footnote>
        <footnote id="F2">Payment of tax liability by withholding securities incident to vesting of restricted stock units.</footnote>
        <footnote id="F3">7,249 Restricted Stock Units became fully vested and have been converted to Common Stock.</footnote>
        <footnote id="F4">9,282 Restricted Stock Units became fully vested and have been converted to Common Stock.</footnote>
        <footnote id="F5">14,020 Restricted Stock Units became fully vested and have been converted to Common Stock.</footnote>
        <footnote id="F6">Each restricted stock unit represents a contingent right to receive one share of EGHT common stock.</footnote>
        <footnote id="F7">19.	As previously reported on a Form 4, the reporting person was awarded 9,608 performance share units (PSUs) on September 26, 2016, of which 50% were eligible to vest on each of the second and third anniversaries of the award date. On September 20, 2018, the first installment of 4,804 PSUs vested at 150.9 % of target, such that 7,249 shares became issuable. Of these shares, 3,800 were issued to the reporting person and the remaining 3,449 were withheld to pay the associated tax liability. The 2,445 units reported in Table II correspond to the additional shares issued in excess of 4,804 share target for the first vesting installment.</footnote>
        <footnote id="F8">This award vests at the rate of one-fourth of such shares at September 22, 2016, one-fourth of such shares at September 22, 2017, one-fourth of such shares at September 22, 2018 and one-fourth of such shares at September 22, 2019.</footnote>
        <footnote id="F9">As previously reported on a Form 4, the reporting person was awarded 14,020 performance share units (PSUs) on September 22, 2015, of which 50% were eligible to vest on each of the second and third anniversaries of the award date. On September 22, 2018, the second installment of 7,010 PSUs vested at 200.0% of target, such that 14,020 shares became issuable. Of these shares, 7,100 were issued to the reporting person and the remaining 6,920 were withheld to pay the associated tax liability. The 7,010 units reported in Table II correspond to the additional shares issued in excess of 7,010 share target for the second vesting installment.</footnote>
        <footnote id="F10">This award vests at the rate of one-fourth of such shares at September 19, 2017, one-fourth of such shares at September 19, 2018, one-fourth of such shares at September 19, 2019 and one-fourth of such shares at September 19, 2020.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ Darren J. Hackman</signatureName>
        <signatureDate>2018-09-24</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
