<SEC-DOCUMENT>0001104659-16-130147.txt : 20160629
<SEC-HEADER>0001104659-16-130147.hdr.sgml : 20160629
<ACCEPTANCE-DATETIME>20160629164635
ACCESSION NUMBER:		0001104659-16-130147
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20160627
FILED AS OF DATE:		20160629
DATE AS OF CHANGE:		20160629

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			SELECTA BIOSCIENCES INC
		CENTRAL INDEX KEY:			0001453687
		STANDARD INDUSTRIAL CLASSIFICATION:	PHARMACEUTICAL PREPARATIONS [2834]
		IRS NUMBER:				000000000
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		480 ARSENAL STREET
		STREET 2:		BUILDING ONE
		CITY:			WATERTOWN
		STATE:			MA
		ZIP:			02472
		BUSINESS PHONE:		617-923-1400

	MAIL ADDRESS:	
		STREET 1:		480 ARSENAL STREET
		STREET 2:		BUILDING ONE
		CITY:			WATERTOWN
		STATE:			MA
		ZIP:			02472

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Nanodimension Limited Partnership
		CENTRAL INDEX KEY:			0001677409
		STATE OF INCORPORATION:			E9
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-37798
		FILM NUMBER:		161739347

	BUSINESS ADDRESS:	
		STREET 1:		GOVERNOR'S SQUARE, UNIT 3-213-6
		STREET 2:		LIME TREE BAY AVE.
		CITY:			GRAND CAYMAN
		STATE:			E9
		ZIP:			KY1-1302
		BUSINESS PHONE:		3 345 946 5556

	MAIL ADDRESS:	
		STREET 1:		GOVERNOR'S SQUARE, UNIT 3-213-6
		STREET 2:		LIME TREE BAY AVE.
		CITY:			GRAND CAYMAN
		STATE:			E9
		ZIP:			KY1-1302

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Nanodimension Management Ltd
		CENTRAL INDEX KEY:			0001677406
		STATE OF INCORPORATION:			E9
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-37798
		FILM NUMBER:		161739348

	BUSINESS ADDRESS:	
		STREET 1:		GOVERNOR'S SQUARE, UNIT 3-213-6
		STREET 2:		LIME TREE BAY AVE.
		CITY:			GRAND CAYMAN
		STATE:			E9
		ZIP:			KY1-1302
		BUSINESS PHONE:		3 345 946 5556

	MAIL ADDRESS:	
		STREET 1:		GOVERNOR'S SQUARE, UNIT 3-213-6
		STREET 2:		LIME TREE BAY AVE.
		CITY:			GRAND CAYMAN
		STATE:			E9
		ZIP:			KY1-1302
</SEC-HEADER>
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        <issuerName>SELECTA BIOSCIENCES INC</issuerName>
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            <rptOwnerName>Nanodimension Management Ltd</rptOwnerName>
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            <rptOwnerStreet2>23 LIME TREE BAY AVE</rptOwnerStreet2>
            <rptOwnerCity>GRAND CAYMAN</rptOwnerCity>
            <rptOwnerState>E9</rptOwnerState>
            <rptOwnerZipCode>KY1-1302</rptOwnerZipCode>
            <rptOwnerStateDescription>CAYMAN ISLANDS</rptOwnerStateDescription>
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            <rptOwnerStreet2>23 LIME TREE BAY AVE</rptOwnerStreet2>
            <rptOwnerCity>GRAND CAYMAN</rptOwnerCity>
            <rptOwnerState>E9</rptOwnerState>
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    <derivativeTable>
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                    <value>315729</value>
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                    <value>0</value>
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        <derivativeTransaction>
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                <transactionCode>C</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
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            <transactionTimeliness>
                <value></value>
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                <transactionShares>
                    <value>94183</value>
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                <transactionPricePerShare>
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                <underlyingSecurityShares>
                    <value>94183</value>
                </underlyingSecurityShares>
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                    <value>See Footnote</value>
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                    <footnoteId id="F3"/>
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        <derivativeTransaction>
            <securityTitle>
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                <transactionShares>
                    <value>83596</value>
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                <transactionPricePerShare>
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            <securityTitle>
                <value>Series E Convertible Preferred Stock</value>
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                <value></value>
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                <transactionShares>
                    <value>93078</value>
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                    <value>0</value>
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                    <value>D</value>
                </transactionAcquiredDisposedCode>
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                <footnoteId id="F5"/>
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                    <value>0</value>
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                <directOrIndirectOwnership>
                    <value>I</value>
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    <footnotes>
        <footnote id="F1">Held by NanoDimension L.P. (&quot;ND LP).</footnote>
        <footnote id="F2">Consists of 660,957 shares held by ND LP, 350,000 shares held by NanoDimension L.P. II (&quot;NDLP2&quot;) and 35,000 shares held by NanoDimension Management Limited (&quot;ND GP&quot;).</footnote>
        <footnote id="F3">ND GP serves as the general partner of ND LP and possesses the power to direct the voting and disposition of the shares owned by ND LP and may be deemed to have indirect beneficial ownership of the shares held by ND LP. NanoDimension II Mangement Limited (&quot;NDGP2&quot;) serves as the general partner of NDLP2 and possesses the power to direct the voting and disposition of the shares owned by NDLP2 and may be deemed to have indirect beneficial ownership of the shares held by NDLP2. ND GP and NDGP2 disclaim beneficial ownership of such shares, except to the extent of their pecuniary interest therein. Jonathan Nicholson and Richard Coles are the members of the board of directors of ND GP and NDGP2 and share voting and dispositive power over the shares held by ND LP and NDLP2. Each reporting person disclaims beneficial ownership of the securities reported herein, except to the extent of their respective pecuniary interest therein.</footnote>
        <footnote id="F4">The preferred stock is convertible at any time, at the holder's election and has no expiration date. The preferred stock automatically converted into common stock on a 1-for-1 basis upon the closing of the Issuer's initial public offering.</footnote>
        <footnote id="F5">The Series E Convertible Preferred Stock  is convertible at any time, at the holder's election and has no expiration date. The Series E Convertible Preferred Stock automatically converted into common stock on an approximately 1-for-1.550115 basis upon the closing of the Issuer's initial public offering.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>NanoDimension Management Ltd. By: /s/ Jonathan Nicholson, Director</signatureName>
        <signatureDate>2016-06-29</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>NanoDimension L.P. By: NanoDimension Management Ltd., its general partner By: /s/ Jonathan Nicholson, Director</signatureName>
        <signatureDate>2016-06-29</signatureDate>
    </ownerSignature>
</ownershipDocument>
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</SEC-DOCUMENT>
