UNITEDSTATESSECURITIESANDEXCHANGECOMMISSION Washington,D.C.20549 Form10-K ¥ANNUALREPORTPURSUANTTOSECTION13OR15(d) OFTHESECURITIESEXCHANGEACTOF1934 ForthefiscalyearendedDecember31,2006 OR nTRANSITIONREPORTPURSUANTTOSECTION13OR15(d) OFTHESECURITIESEXCHANGEACTOF1934 Forthetransitionperiodfromto CommissionFileNumber0-28018 YAHOO!INC. (ExactnameofRegistrantasspecifiedinitscharter) Delaware77-0398689 (Stateorotherjurisdictionof incorporationororganization) (I.R.S.Employer IdentificationNo.) 701FirstAvenue Sunnyvale,California94089 (Addressofprincipalexecutiveoffices,includingzipcode) Registrant’stelephonenumber,includingareacode: (408)349-3300 SecuritiesregisteredpursuanttoSection12(b)oftheAct: None SecuritiesregisteredpursuanttoSection12(g)oftheAct: Commonstock,$.001parvalue (TitleofClass) IndicatebycheckmarkiftheRegistrantisawell-knownseasonedissuerasdefinedinRule405oftheSecuritiesAct. Yes¥Non IndicatebycheckmarkiftheRegistrantisnotrequiredtofilereportspursuanttoSection13orSection15(d)ofthe Act.YesnNo¥ IndicatebycheckmarkwhethertheRegistrant(1)hasfiledallreportsrequiredtobefiledbySection13or15(d)oftheSecurities ExchangeActof1934duringthepreceding12months(orforsuchshorterperiodthattheRegistrantwasrequiredtofilesuch reports),and(2)hasbeensubjecttosuchfilingrequirementsforthepast90days.Yes¥Non IndicatebycheckmarkifdisclosureofdelinquentfilerspursuanttoItem405ofRegulationS-Kisnotcontainedherein,andwill notbecontained,tothebestofRegistrant’sknowledge,indefinitiveproxyorinformationstatementsincorporatedbyreference inPartIIIofthisForm10-KoranyamendmenttothisForm10-K.n IndicatebycheckmarkwhethertheRegistrantisalargeacceleratedfiler,anacceleratedfiler,oranon-acceleratedfiler.See definitionof“acceleratedfilerandlargeacceleratedfiler”inRule12b-2oftheExchangeAct.(Checkone): Largeacceleratedfiler¥AcceleratedfilernNon-acceleratedfilern IndicatebycheckmarkwhethertheRegistrantisashellcompany(asdefinedbyRule12b-2oftheExchange Act).YesnNo¥ AsofJune30,2006,theaggregatemarketvalueofvotingstockheldbynon-affiliatesoftheRegistrant,basedupontheclosing salespricefortheRegistrant’scommonstock,asreportedintheNASDAQStockMarket,was$41,812,571,856.Sharesof commonstockheldbyeachofficeranddirectorandbyeachpersonwhoowns10percentormoreoftheoutstandingcommon stockhavebeenexcludedinthatsuchpersonsmaybedeemedtobeaffiliates.Thisdeterminationofaffiliatestatusisnot necessarilyaconclusivedeterminationforanyotherpurpose. ThenumberofsharesoftheRegistrant’scommonstockoutstandingasofFebruary15,2007was1,356,539,645. DOCUMENTSINCORPORATEDBYREFERENCE Thefollowingdocuments(orpartsthereof)areincorporatedbyreferenceintothefollowingpartsofthisForm10-K: (1)ProxyStatementforthe2007AnnualMeetingofStockholders—PartIIIItems10,11,12,13and14.

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