<SEC-DOCUMENT>0001181431-13-054427.txt : 20131018
<SEC-HEADER>0001181431-13-054427.hdr.sgml : 20131018
<ACCEPTANCE-DATETIME>20131018143244
ACCESSION NUMBER:		0001181431-13-054427
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20131016
FILED AS OF DATE:		20131018
DATE AS OF CHANGE:		20131018

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			MACROGENICS INC
		CENTRAL INDEX KEY:			0001125345
		STANDARD INDUSTRIAL CLASSIFICATION:	PHARMACEUTICAL PREPARATIONS [2834]
		IRS NUMBER:				000000000
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		9640 MEDICAL CENTER DRIVE
		CITY:			Rockville
		STATE:			MD
		ZIP:			20850
		BUSINESS PHONE:		301-251-5172

	MAIL ADDRESS:	
		STREET 1:		9640 MEDICAL CENTER DRIVE
		CITY:			ROCKVILLE
		STATE:			MD
		ZIP:			20850

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			ORONSKY ARNOLD L
		CENTRAL INDEX KEY:			0001207833

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-36112
		FILM NUMBER:		131159173

	MAIL ADDRESS:	
		STREET 1:		C/O INTERWEST PARTNERS
		STREET 2:		2710 SAND HILL ROAD, 2ND FLOOR
		CITY:			MENLO PARK
		STATE:			CA
		ZIP:			94025
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>rrd392967.xml
<DESCRIPTION>FORM 4
<TEXT>
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    <periodOfReport>2013-10-16</periodOfReport>

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        <issuerCik>0001125345</issuerCik>
        <issuerName>MACROGENICS INC</issuerName>
        <issuerTradingSymbol>MGNX</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
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            <rptOwnerCik>0001207833</rptOwnerCik>
            <rptOwnerName>ORONSKY ARNOLD L</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O MACROGENICS, INC.</rptOwnerStreet1>
            <rptOwnerStreet2>9640 MEDICAL CENTER DRIVE</rptOwnerStreet2>
            <rptOwnerCity>ROCKVILLE</rptOwnerCity>
            <rptOwnerState>MD</rptOwnerState>
            <rptOwnerZipCode>20850</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
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        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
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                    <value>See Footnote</value>
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                    <value>See Footnote</value>
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                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See Footnote</value>
                    <footnoteId id="F7"/>
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        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
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            <transactionDate>
                <value>2013-10-16</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>X</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
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            <transactionAmounts>
                <transactionShares>
                    <value>2448</value>
                </transactionShares>
                <transactionPricePerShare>
                    <footnoteId id="F8"/>
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                    <value>1908716</value>
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            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See Footnote</value>
                    <footnoteId id="F9"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
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            <conversionOrExercisePrice>
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            <transactionDate>
                <value>2013-10-16</value>
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            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>C</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
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            <transactionAmounts>
                <transactionShares>
                    <value>12001000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <footnoteId id="F1"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <footnoteId id="F1"/>
            </exerciseDate>
            <expirationDate>
                <footnoteId id="F1"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>962819</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>0</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
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                <natureOfOwnership>
                    <value>See Footnote</value>
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                </natureOfOwnership>
            </ownershipNature>
        </derivativeTransaction>
        <derivativeTransaction>
            <securityTitle>
                <value>Series B Convertible Preferred Stock</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <footnoteId id="F3"/>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2013-10-16</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>C</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>10131856</value>
                </transactionShares>
                <transactionPricePerShare>
                    <footnoteId id="F3"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <footnoteId id="F3"/>
            </exerciseDate>
            <expirationDate>
                <footnoteId id="F3"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>615284</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
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                <sharesOwnedFollowingTransaction>
                    <value>0</value>
                </sharesOwnedFollowingTransaction>
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            <ownershipNature>
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                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See Footnote</value>
                    <footnoteId id="F4"/>
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        <derivativeTransaction>
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            <transactionDate>
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                <equitySwapInvolved>0</equitySwapInvolved>
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                </transactionShares>
                <transactionPricePerShare>
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                <transactionAcquiredDisposedCode>
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                </transactionAcquiredDisposedCode>
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            <exerciseDate>
                <footnoteId id="F5"/>
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            <expirationDate>
                <footnoteId id="F5"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>295494</value>
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                <sharesOwnedFollowingTransaction>
                    <value>0</value>
                </sharesOwnedFollowingTransaction>
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            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See Footnote</value>
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        </derivativeTransaction>
        <derivativeTransaction>
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                <value>Series D-2 Convertible Preferred Stock</value>
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                <transactionCode>C</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
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                    <value>613402</value>
                </transactionShares>
                <transactionPricePerShare>
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                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
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            <exerciseDate>
                <footnoteId id="F5"/>
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            <expirationDate>
                <footnoteId id="F5"/>
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                <underlyingSecurityTitle>
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                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>32671</value>
                </underlyingSecurityShares>
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                <sharesOwnedFollowingTransaction>
                    <value>0</value>
                </sharesOwnedFollowingTransaction>
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            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See Footnote</value>
                    <footnoteId id="F7"/>
                </natureOfOwnership>
            </ownershipNature>
        </derivativeTransaction>
        <derivativeTransaction>
            <securityTitle>
                <value>Series D-2 Convertible Preferred Warrants</value>
            </securityTitle>
            <conversionOrExercisePrice>
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            <transactionDate>
                <value>2013-10-16</value>
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                <transactionFormType>4</transactionFormType>
                <transactionCode>X</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
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            <transactionAmounts>
                <transactionShares>
                    <value>46005</value>
                </transactionShares>
                <transactionPricePerShare>
                    <footnoteId id="F8"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <footnoteId id="F10"/>
            </exerciseDate>
            <expirationDate>
                <value>2013-10-16</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>2448</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
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                <sharesOwnedFollowingTransaction>
                    <value>0</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See Footnote</value>
                    <footnoteId id="F9"/>
                </natureOfOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">Each share of Series A-1 Convertible Preferred Stock converted into approximately 0.0802 of a  share of Common Stock without payment of  further consideration upon the  closing of the Issuer's initial public offering. The shares had no expiration date.</footnote>
        <footnote id="F2">These securities are held as follows: 928,647 by InterWest Partners VIII, LP (&quot;Partners VIII&quot;), 7,521 by InterWest Investors VIII, LP ( &quot;Investors VIII&quot;) and 26,651 by InterWest Investors Q VIII, LP (&quot;Q VIII&quot;) (collectively, the &quot;InterWest Funds&quot;) .  Arnold Oronsky is Managing Director of the InterWest Funds' general partner.  Arnold Oronsky disclaims beneficial ownership of these securities except to the extent of any pecuniary interest therein.</footnote>
        <footnote id="F3">Each share of Series B Convertible Preferred Stock converted into approximately 0.0607 of a  share of Common Stock without payment of  further consideration upon the  closing of the Issuer's initial public offering. The shares had no expiration date.</footnote>
        <footnote id="F4">These securities are held as follows: 593,566 by Partners VIII, 4,737 by Investors VIII and  16,981 by Q VIII.  Arnold Oronsky is Managing Director of the InterWest Funds' general partner.  Arnold Oronsky disclaims beneficial ownership of these securities except to the extent of any pecuniary interest therein.</footnote>
        <footnote id="F5">Each share of Series C Convertible Preferred Stock and each share of Series D-2 Convertible Preferred Stock converted into approximately 0.0533  of a  share of Common Stock without payment of  further consideration upon the  closing of the Issuer's initial public offering. The shares had no expiration date.</footnote>
        <footnote id="F6">These securities are held as follows: 285,064 by Partners VIII, 2,275 by Investors VIII and  8,155 by Q VIII.  Arnold Oronsky is Managing Director of the InterWest Funds' general partner.  Arnold Oronsky disclaims beneficial ownership of these securities except to the extent of any pecuniary interest therein.</footnote>
        <footnote id="F7">These securities are held as follows: 31,519 by Partners VIII, 251 by Investors VIII and 901 by Q VIII.  Arnold Oronsky is Managing Director of the InterWest Funds' general partner.  Arnold Oronsky disclaims beneficial ownership of these securities except to the extent of any pecuniary interest therein.</footnote>
        <footnote id="F8">Upon exercise for $12.2425 per share, Upon exercise, each Series D-2 Convertible Preferred Warrant converted into an equal number of shares of Series D-2 Convertible Preferred Stock. Had the warrants not been exercised, they would have expired upon the closing of the initial public offering. Upon the closing of the Issuer's initial public offering each share of Series D-2 Convertible Preferred Stock then converted into approximately 0.0533 of a share of Common Stock without payment of further consideration. The shares of Series D-2 Convertible Preferred Stock had no expiration date.</footnote>
        <footnote id="F9">These securities are held as follows: 2,363 by Partners VIII, 18 by Investors VIII and 67 by  Q VIII.  Arnold Oronsky is Managing Director of the InterWest Funds' general partner.  Arnold Oronsky disclaims beneficial ownership of these securities except to the extent of any pecuniary interest therein.</footnote>
        <footnote id="F10">Immediately.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ Lynn Cilinski, attorney-in-fact</signatureName>
        <signatureDate>2013-10-18</signatureDate>
    </ownerSignature>
</ownershipDocument>
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</SEC-DOCUMENT>
