<SEC-DOCUMENT>0001209191-14-027011.txt : 20140410
<SEC-HEADER>0001209191-14-027011.hdr.sgml : 20140410
<ACCEPTANCE-DATETIME>20140410171740
ACCESSION NUMBER:		0001209191-14-027011
CONFORMED SUBMISSION TYPE:	3
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20140410
FILED AS OF DATE:		20140410
DATE AS OF CHANGE:		20140410

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Cerulean Pharma Inc.
		CENTRAL INDEX KEY:			0001401914
		STANDARD INDUSTRIAL CLASSIFICATION:	PHARMACEUTICAL PREPARATIONS [2834]
		IRS NUMBER:				000000000
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		840 MEMORIAL DRIVE
		STREET 2:		5TH FLOOR
		CITY:			Cambridge
		STATE:			MA
		ZIP:			02139
		BUSINESS PHONE:		617-551-9600

	MAIL ADDRESS:	
		STREET 1:		840 MEMORIAL DRIVE
		STREET 2:		5TH FLOOR
		CITY:			Cambridge
		STATE:			MA
		ZIP:			02139

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	Tempo Pharmaceuticals Inc
		DATE OF NAME CHANGE:	20070604

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			POLARIS VENTURE PARTNERS IV LP
		CENTRAL INDEX KEY:			0001157864
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-36395
		FILM NUMBER:		14758046

	BUSINESS ADDRESS:	
		STREET 1:		1000 WINTER STREET
		STREET 2:		SUITE 3350
		CITY:			WALTHAM
		STATE:			MA
		ZIP:			024511215
		BUSINESS PHONE:		7812900770

	MAIL ADDRESS:	
		STREET 1:		1000 WINTER STREET
		STREET 2:		SUITE 3350
		CITY:			WALTHAM
		STATE:			MA
		ZIP:			02451

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			POLARIS VENTURE PARTNERS ENTREPRENEURS FUND IV LP
		CENTRAL INDEX KEY:			0001170720
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-36395
		FILM NUMBER:		14758047

	BUSINESS ADDRESS:	
		STREET 1:		1000 WINTER STREET
		STREET 2:		SUITE 3350
		CITY:			WALTHAM
		STATE:			MA
		ZIP:			02451-1215
		BUSINESS PHONE:		7812900770

	MAIL ADDRESS:	
		STREET 1:		1000 WINTER STREET
		STREET 2:		SUITE 3350
		CITY:			WALTHAM
		STATE:			MA
		ZIP:			02451

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Polaris Venture Management Co IV LLC
		CENTRAL INDEX KEY:			0001295438
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-36395
		FILM NUMBER:		14758048

	BUSINESS ADDRESS:	
		STREET 1:		1000 WINTER STREET
		STREET 2:		SUITE 3350
		CITY:			WALTHAM
		STATE:			MA
		ZIP:			02451
		BUSINESS PHONE:		7812900770

	MAIL ADDRESS:	
		STREET 1:		1000 WINTER STREET
		STREET 2:		SUITE 3350
		CITY:			WALTHAM
		STATE:			MA
		ZIP:			02451
</SEC-HEADER>
<DOCUMENT>
<TYPE>3
<SEQUENCE>1
<FILENAME>doc3.xml
<DESCRIPTION>FORM 3 SUBMISSION
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0206</schemaVersion>

    <documentType>3</documentType>

    <periodOfReport>2014-04-10</periodOfReport>

    <noSecuritiesOwned>0</noSecuritiesOwned>

    <issuer>
        <issuerCik>0001401914</issuerCik>
        <issuerName>Cerulean Pharma Inc.</issuerName>
        <issuerTradingSymbol>CERU</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001295438</rptOwnerCik>
            <rptOwnerName>Polaris Venture Management Co IV LLC</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>1000 WINTER STREET</rptOwnerStreet1>
            <rptOwnerStreet2>SUITE 3350</rptOwnerStreet2>
            <rptOwnerCity>WALTHAM</rptOwnerCity>
            <rptOwnerState>MA</rptOwnerState>
            <rptOwnerZipCode>02451</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001170720</rptOwnerCik>
            <rptOwnerName>POLARIS VENTURE PARTNERS ENTREPRENEURS FUND IV LP</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>1000 WINTER STREET</rptOwnerStreet1>
            <rptOwnerStreet2>SUITE 3350</rptOwnerStreet2>
            <rptOwnerCity>WALTHAM</rptOwnerCity>
            <rptOwnerState>MA</rptOwnerState>
            <rptOwnerZipCode>02451</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
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    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001157864</rptOwnerCik>
            <rptOwnerName>POLARIS VENTURE PARTNERS IV LP</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>1000 WINTER STREET</rptOwnerStreet1>
            <rptOwnerStreet2>SUITE 3350</rptOwnerStreet2>
            <rptOwnerCity>WALTHAM</rptOwnerCity>
            <rptOwnerState>MA</rptOwnerState>
            <rptOwnerZipCode>02451</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <derivativeTable>
        <derivativeHolding>
            <securityTitle>
                <value>Seed Convertible Preferred Stock</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <footnoteId id="F1"/>
                <footnoteId id="F2"/>
            </conversionOrExercisePrice>
            <exerciseDate>
                <footnoteId id="F1"/>
            </exerciseDate>
            <expirationDate>
                <footnoteId id="F1"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>181399</value>
                    <footnoteId id="F1"/>
                    <footnoteId id="F2"/>
                    <footnoteId id="F3"/>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See footnote</value>
                    <footnoteId id="F4"/>
                    <footnoteId id="F5"/>
                </natureOfOwnership>
            </ownershipNature>
        </derivativeHolding>
        <derivativeHolding>
            <securityTitle>
                <value>Series A Convertible Preferred Stock</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <footnoteId id="F2"/>
                <footnoteId id="F6"/>
            </conversionOrExercisePrice>
            <exerciseDate>
                <footnoteId id="F6"/>
            </exerciseDate>
            <expirationDate>
                <footnoteId id="F6"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>355307</value>
                    <footnoteId id="F2"/>
                    <footnoteId id="F6"/>
                    <footnoteId id="F7"/>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See footnote</value>
                    <footnoteId id="F4"/>
                    <footnoteId id="F5"/>
                </natureOfOwnership>
            </ownershipNature>
        </derivativeHolding>
        <derivativeHolding>
            <securityTitle>
                <value>Series B Convertible Preferred Stock</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <footnoteId id="F2"/>
                <footnoteId id="F8"/>
            </conversionOrExercisePrice>
            <exerciseDate>
                <footnoteId id="F8"/>
            </exerciseDate>
            <expirationDate>
                <footnoteId id="F8"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>184314</value>
                    <footnoteId id="F2"/>
                    <footnoteId id="F8"/>
                    <footnoteId id="F9"/>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See footnote</value>
                    <footnoteId id="F4"/>
                    <footnoteId id="F5"/>
                </natureOfOwnership>
            </ownershipNature>
        </derivativeHolding>
        <derivativeHolding>
            <securityTitle>
                <value>Series C Convertible Preferred Stock</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <footnoteId id="F2"/>
                <footnoteId id="F10"/>
            </conversionOrExercisePrice>
            <exerciseDate>
                <footnoteId id="F10"/>
            </exerciseDate>
            <expirationDate>
                <footnoteId id="F10"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>498460</value>
                    <footnoteId id="F2"/>
                    <footnoteId id="F10"/>
                    <footnoteId id="F11"/>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See footnote</value>
                    <footnoteId id="F4"/>
                    <footnoteId id="F5"/>
                </natureOfOwnership>
            </ownershipNature>
        </derivativeHolding>
        <derivativeHolding>
            <securityTitle>
                <value>Series D Convertible Preferred Stock</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <footnoteId id="F2"/>
                <footnoteId id="F12"/>
            </conversionOrExercisePrice>
            <exerciseDate>
                <footnoteId id="F12"/>
            </exerciseDate>
            <expirationDate>
                <footnoteId id="F12"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>212621</value>
                    <footnoteId id="F2"/>
                    <footnoteId id="F12"/>
                    <footnoteId id="F13"/>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See footnote</value>
                    <footnoteId id="F4"/>
                    <footnoteId id="F5"/>
                </natureOfOwnership>
            </ownershipNature>
        </derivativeHolding>
        <derivativeHolding>
            <securityTitle>
                <value>Warrant to purchase Series C Preferred Stock</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>0.74</value>
                <footnoteId id="F14"/>
            </conversionOrExercisePrice>
            <exerciseDate>
                <footnoteId id="F14"/>
            </exerciseDate>
            <expirationDate>
                <value>2017-11-12</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Series C Convertible Preferred Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>77478</value>
                    <footnoteId id="F14"/>
                    <footnoteId id="F15"/>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See footnote</value>
                    <footnoteId id="F4"/>
                    <footnoteId id="F5"/>
                </natureOfOwnership>
            </ownershipNature>
        </derivativeHolding>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">Shares of Seed Convertible Preferred Stock are convertible into Common Stock on a 0.0726-for-1 basis into the number of shares of Common Stock shown in column 3 at any time at the holder's election and automatically upon the closing of the Company's initial public offering. The shares have no expiration date.</footnote>
        <footnote id="F2">Reflects a 1-for-14.5074 reverse stock split effected on March 31, 2014.</footnote>
        <footnote id="F3">Consists of 178,061 and 3,338 shares of Common Stock issuable upon conversion of Seed Convertible Preferred Stock held by Polaris Venture Partners IV, LP  (&quot;Polaris IV&quot;) and Polaris Ventures Partners Entrepreneurs' Fund IV, LP (&quot;Polaris EFund IV&quot;), respectively.</footnote>
        <footnote id="F4">Each of Polaris IV and Polaris EFund IV has the sole voting and investment power with respect to the shares directly held by it. The general partner of each of Polaris IV and Polaris EFund IV is Polaris Venture Management Co. IV, LLC (&quot;Polaris Management IV).  Polaris Management IV may be deemed to have sole voting and investment power with respect to the shares held by it of which they are general partner and it disclaims beneficial ownership of all the shares held by it except to the extent of its proportionate pecuniary interests therein.</footnote>
        <footnote id="F5">North Star Venture Management 2000, LLC (&quot;North Star&quot;) directly or indirectly provides investment advisory services to various venture capital funds, including Polaris IV and Polaris EFund IV. The members of North Star are also members of Polaris Management IV, and as such, they may be deemed to share voting and investment power over the shares held by Polaris IV and Polaris EFund IV. The members of North Star disclaim beneficial ownership of such shares, except to the extent of their proportionate pecuniary interest therein.</footnote>
        <footnote id="F6">Shares of Series A Convertible Preferred Stock are convertible into Common Stock on a 0.0924-for-1 basis into the number of shares of Common Stock shown in column 3 at any time at the holder's election and automatically upon the closing of the Company's initial public offering. The shares have no expiration date.</footnote>
        <footnote id="F7">Consists of 348,769 and 6,538 shares of Common Stock issuable upon conversion of Series A Convertible Preferred Stock held by Polaris IV and Polaris EFund IV, respectively.</footnote>
        <footnote id="F8">Shares of Series B Convertible Preferred Stock are convertible into Common Stock on a 0.1130-for-1 basis into the number of shares of Common Stock shown in column 3 at any time at the holder's election and automatically upon the closing of the Company's initial public offering. The shares have no expiration date.</footnote>
        <footnote id="F9">Consists of 180,923 and 3,391 shares of Common Stock issuable upon conversion of Series B Convertible Preferred Stock held by Polaris IV and Polaris EFund IV, respectively.</footnote>
        <footnote id="F10">Shares of Series C Convertible Preferred Stock are convertible into Common Stock on a 0.0689-for-1 basis into the number of shares of Common Stock shown in column 3 at any time at the holder's election and automatically upon the closing of the Company's initial public offering. The shares have no expiration date.</footnote>
        <footnote id="F11">Consists of 489,288 and 9,172 shares of Common Stock issuable upon conversion of Series C Convertible Preferred Stock held by Polaris IV and Polaris EFund IV, respectively.</footnote>
        <footnote id="F12">Shares of Series D Convertible Preferred Stock are convertible into Common Stock on a 0.0689-for-1 basis into the number of shares of Common Stock shown in column 3 at any time at the holder's election and automatically upon the closing of the Company's initial public offering. The shares have no expiration date.</footnote>
        <footnote id="F13">Consists of 208,709 and 3,912 shares of Common Stock issuable upon conversion of Series D Convertible Preferred Stock held by Polaris IV and Polaris EFund IV, respectively.</footnote>
        <footnote id="F14">In connection with the completion of the Company's initial public offering of Common Stock the warrant to purchase Series C Convertible Preferred Stock shall automatically convert into a warrant to purchase Common Stock on a 0.0689-for-1 basis and is exercisable at any time at the holder's election.</footnote>
        <footnote id="F15">Consists of 76,053 and 1,425 shares of Series C Convertible Preferred Stock issuable upon exercise of the warrants to purchase Series C Convertible Preferred Stock held by Polaris IV and Polaris EFund IV, respectively.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ John J. Gannon, attorney-in-fact for Polaris Venture Management Co. IV, L.L.C.</signatureName>
        <signatureDate>2014-04-10</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>/s/ John J. Gannon, attorney-in-fact for Polaris Venture Partners Entrepreneurs Fund IV LP</signatureName>
        <signatureDate>2014-04-10</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>/s/ John J. Gannon, attorney-in-fact for Polaris Venture Partners IV LP</signatureName>
        <signatureDate>2014-04-10</signatureDate>
    </ownerSignature>
</ownershipDocument>
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</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
