<SEC-DOCUMENT>0000820318-17-000004.txt : 20170821
<SEC-HEADER>0000820318-17-000004.hdr.sgml : 20170821
<ACCEPTANCE-DATETIME>20170821154856
ACCESSION NUMBER:		0000820318-17-000004
CONFORMED SUBMISSION TYPE:	4/A
PUBLIC DOCUMENT COUNT:		2
CONFORMED PERIOD OF REPORT:	20170818
FILED AS OF DATE:		20170821
DATE AS OF CHANGE:		20170821

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			SADASIVAM SHAKER
		CENTRAL INDEX KEY:			0001233432

	FILING VALUES:
		FORM TYPE:		4/A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-16195
		FILM NUMBER:		171043104

	MAIL ADDRESS:	
		STREET 1:		P O BOX 8
		CITY:			SAINT PETERS
		STATE:			MO
		ZIP:			63376

	FORMER NAME:	
		FORMER CONFORMED NAME:	SADASIVAM CHANDRASEKHAR
		DATE OF NAME CHANGE:	20030516

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			II-VI INC
		CENTRAL INDEX KEY:			0000820318
		STANDARD INDUSTRIAL CLASSIFICATION:	OPTICAL INSTRUMENTS & LENSES [3827]
		IRS NUMBER:				251214948
		STATE OF INCORPORATION:			PA
		FISCAL YEAR END:			0630

	BUSINESS ADDRESS:	
		STREET 1:		375 SAXONBURG BLVD
		CITY:			SAXONBURG
		STATE:			PA
		ZIP:			16056
		BUSINESS PHONE:		724-352-4455

	MAIL ADDRESS:	
		STREET 1:		375 SAXONBURG BLVD
		CITY:			SAXONBURG
		STATE:			PA
		ZIP:			16056
</SEC-HEADER>
<DOCUMENT>
<TYPE>4/A
<SEQUENCE>1
<FILENAME>primary_doc.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>4/A</documentType>

    <periodOfReport>2017-08-18</periodOfReport>

    <dateOfOriginalSubmission>2017-08-21</dateOfOriginalSubmission>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000820318</issuerCik>
        <issuerName>II-VI INC</issuerName>
        <issuerTradingSymbol>IIVI</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001233432</rptOwnerCik>
            <rptOwnerName>SADASIVAM SHAKER</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>P O BOX 8</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>SAINT PETERS</rptOwnerCity>
            <rptOwnerState>MO</rptOwnerState>
            <rptOwnerZipCode>63376</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2017-08-18</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>2280</value>
                    <footnoteId id="F1"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>5976</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Option (Right to Buy)</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>35.25</value>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2017-08-18</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>5700</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <footnoteId id="F2"/>
            </exerciseDate>
            <expirationDate>
                <value>2027-08-18</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>5700</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>5700</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">These shares represent a restricted stock award granted to the reporting person pursuant to the II-VI Incorporated Amended and Restated 2012 Omnibus Incentive Plan.  The award will vest in three equal annual installments beginning on August 18, 2018.</footnote>
        <footnote id="F2">These options will vest in four equal annual installments beginning on August 18, 2018.</footnote>
    </footnotes>

    <remarks>The sole purpose of this amendment is to file a related power of attorney that was inadvertently omitted from the original filing.</remarks>

    <ownerSignature>
        <signatureName>/s/ Jeffrey W. Acre, Attorney-in-Fact</signatureName>
        <signatureDate>2017-08-21</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-24
<SEQUENCE>2
<FILENAME>sadasivampoa.txt
<DESCRIPTION>POA
<TEXT>
POWER OF ATTORNEY

I, Shaker Sadasivam, do hereby make, constitute, designate and appoint
Jeffrey W. Acre and D. Mark McMillan, and each of them and their designees
or substitutes, as my true and lawful Attorney-in-Fact, for me and in my
name and on my behalf generally:

1. To execute and file any and all forms required to be filed by me with the
U.S. Securities Exchange Commission ("SEC") pursuant to Section 16 of the
Securities Exchange Act of 1934, as amended (the "Exchange Act"), including
Forms 3, 4, and 5, and any amendment thereto;

2. To do and perform any and all acts which may be necessary or desirable to
prepare, complete, and execute any and all forms required to be filed by me with
the SEC) pursuant to Section 16 of the Exchange Act, including Forms 3, 4, and
5, and any amendment thereto, and timely deliver and file such forms or
amendments with the SEC and any stock exchange or similar authority; and

3. To take any other action of any type whatsoever in connection with the
foregoing which, in the opinion of either such attorney-in-fact, may be of
benefit to, in the best interest of, or legally required by, me, it being
understood that the documents executed by either such attorney-in-fact on my
behalf pursuant to this Power of Attorney shall be in such form and shall
contain such terms and conditions as either such attorney-in-fact may approve
in either such attorney-in-fact's discretion.

I hereby grant to each such attorney-in-fact full power and authority to do and
perform any and every act and thing whatsoever requisite, necessary, or proper
to be done in the exercise of any of the rights and powers herein granted, as
fully to all intents and purposes as I might or could do if I was personally
present, with full power of substitution or revocation, hereby ratifying and
confirming all that each such attorney-in-fact, or each such attorney-in-fact's
substitute or substitutes, shall lawfully do or cause to be done by virtue of
this Power of Attorney and the rights and powers herein granted.

I acknowledge that each of the foregoing attorneys-in-fact, in serving in such
capacity at my request, is not assuming nor relieving any of my responsibilities
to comply with Section 16 of the Exchange Act.

I also acknowledge that none of the foregoing attorneys-in-fact assume (i) any
liability for my responsibility to comply with the requirements of the
Exchange Act, (ii) any liability for my failure to comply with such
requirements, or (iii) any of my obligations or liabilities for profit
disgorgement under Section 16(b) of the Exchange Act.

This Power of Attorney shall be effective immediately upon execution and shall
be revoked by my giving to any such attorney-in-fact acting hereunder written
notification of the revocation, which notice shall
not be considered binding unless actually received.

I hereby declare that this Power of Attorney shall not be affected by my
disability or incapacity and that as against me and all persons claiming under
me, everything which any such attorney-in-fact shall do
or cause to be done shall be valid and effectual in favor of any person claiming
a benefit thereunder, who, before the doing thereof, shall not have had notice
of revocation of this instrument.

IN WITNESS WHEREOF, I have caused this Power of Attorney to be executed this
16th day of August, 2016.


GRANTOR:


	/s/ Shaker Sadasivam

Printed Name:  	Shaker Sadasivam
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
