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<?xml version="1.0" encoding="windows-1252"?> |
<ownershipDocument> |
| <schemaVersion> X0206 </schemaVersion> |
| <documentType> 3 </documentType> |
| <periodOfReport> 2014-04-01 </periodOfReport> |
| <noSecuritiesOwned> 0 </noSecuritiesOwned> |
| <issuer> |
| | <issuerCik> 0001595974 </issuerCik> |
| | <issuerName> RUBICON PROJECT, INC. </issuerName> |
| | <issuerTradingSymbol> RUBI </issuerTradingSymbol> |
| | </issuer> |
| <reportingOwner> |
| | <reportingOwnerId> |
| | | <rptOwnerCik> 0001564708 </rptOwnerCik> |
| | | <rptOwnerName> NEWS CORP </rptOwnerName> |
| | | </reportingOwnerId> |
| | <reportingOwnerAddress> |
| | | <rptOwnerStreet1> 1211 AVENUE OF THE AMERICAS </rptOwnerStreet1> |
| | | <rptOwnerStreet2></rptOwnerStreet2> |
| | | <rptOwnerCity> NEW YORK </rptOwnerCity> |
| | | <rptOwnerState> NY </rptOwnerState> |
| | | <rptOwnerZipCode> 10036 </rptOwnerZipCode> |
| | | <rptOwnerStateDescription></rptOwnerStateDescription> |
| | | </reportingOwnerAddress> |
| | <reportingOwnerRelationship> |
| | | <isDirector> 0 </isDirector> |
| | | <isOfficer> 0 </isOfficer> |
| | | <isTenPercentOwner> 1 </isTenPercentOwner> |
| | | <isOther> 0 </isOther> |
| | | </reportingOwnerRelationship> |
| | </reportingOwner> |
| <nonDerivativeTable> |
| | <nonDerivativeHolding> |
| | | <securityTitle> |
| <value> Class B Common Stock </value> |
| <footnoteId id="F1"/> |
| <footnoteId id="F2"/> |
| </securityTitle> |
| | | <postTransactionAmounts> |
| <sharesOwnedFollowingTransaction> |
| <value> 4190063 </value> |
| </sharesOwnedFollowingTransaction> |
| </postTransactionAmounts> |
| | | <ownershipNature> |
| <directOrIndirectOwnership> |
| <value> D </value> |
| </directOrIndirectOwnership> |
| </ownershipNature> |
| | | </nonDerivativeHolding> |
| | </nonDerivativeTable> |
| <derivativeTable> |
| | <derivativeHolding> |
| | | <securityTitle> |
| <value> Series D Convertible Preferred Stock </value> |
| </securityTitle> |
| | | <conversionOrExercisePrice> |
| <footnoteId id="F3"/> |
| </conversionOrExercisePrice> |
| | | <exerciseDate> |
| <footnoteId id="F3"/> |
| </exerciseDate> |
| | | <expirationDate> |
| <footnoteId id="F3"/> |
| </expirationDate> |
| | | <underlyingSecurity> |
| <underlyingSecurityTitle> |
| <value> Class A Common Stock </value> |
| <footnoteId id="F2"/> |
| </underlyingSecurityTitle> |
| <underlyingSecurityShares> |
| <value> 1406062 </value> |
| </underlyingSecurityShares> |
| </underlyingSecurity> |
| | | <ownershipNature> |
| <directOrIndirectOwnership> |
| <value> D </value> |
| </directOrIndirectOwnership> |
| </ownershipNature> |
| | | </derivativeHolding> |
| | </derivativeTable> |
| <footnotes> |
| | <footnote id="F1"> The Class B Common Stock will automatically convert into Class A Common Stock on a one-for-one basis immediately prior to the completion of the initial public offering of The Rubicon Project, Inc.'s (the "Issuer") Common Stock. </footnote> |
| | <footnote id="F2"> Pursuant to the Sixth Amended and Restated Certificate of Incorporation (the "A&R Charter") of the Issuer to be filed immediately prior to the completion of the Issuer's initial public offering, effective upon the filing of the A&R Charter each share of Class A Common Stock (including each share of Class A Common Stock issued upon the conversion of shares of the Company's Series D Convertible Preferred Stock upon completion of the Issuer's initial public offering ), and each share of Class B Common Stock that is issued and outstanding and has not been converted into Class A Common Stock, will be automatically reclassified and converted into one share of a single class of Common Stock. </footnote> |
| | <footnote id="F3"> The Series D Convertible Preferred Stock will automatically convert into 1/2 of a share of Class A Common Stock upon completion of the Issuer's initial public offering of its Common Stock. The Convertible Preferred Stock has no expiration date. </footnote> |
| | </footnotes> |
| <ownerSignature> |
| | <signatureName> /s/ Michael L. Bunder, Senior Vice President, Deputy General Counsel and Corporate Secretary </signatureName> |
| | <signatureDate> 2014-04-01 </signatureDate> |
| | </ownerSignature> |
| </ownershipDocument> |