<SEC-DOCUMENT>0001127602-19-003725.txt : 20190204 <SEC-HEADER>0001127602-19-003725.hdr.sgml : 20190204 <ACCEPTANCE-DATETIME>20190204160424 ACCESSION NUMBER: 0001127602-19-003725 CONFORMED SUBMISSION TYPE: 4 PUBLIC DOCUMENT COUNT: 1 CONFORMED PERIOD OF REPORT: 20190204 FILED AS OF DATE: 20190204 DATE AS OF CHANGE: 20190204 REPORTING-OWNER: OWNER DATA: COMPANY CONFORMED NAME: Polacek Michael S. CENTRAL INDEX KEY: 0001449213 FILING VALUES: FORM TYPE: 4 SEC ACT: 1934 Act SEC FILE NUMBER: 001-36102 FILM NUMBER: 19563692 MAIL ADDRESS: STREET 1: NATIONAL SEMICONDUCTOR STREET 2: 2900 SEMINCONDUCTOR DRIVE, M/S C1-640 CITY: SANTA CLARA STATE: CA ZIP: 95051 ISSUER: COMPANY DATA: COMPANY CONFORMED NAME: Knowles Corp CENTRAL INDEX KEY: 0001587523 STANDARD INDUSTRIAL CLASSIFICATION: HOUSEHOLD AUDIO & VIDEO EQUIPMENT [3651] IRS NUMBER: 901002689 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 BUSINESS ADDRESS: STREET 1: 1151 MAPLEWOOD DRIVE CITY: ITASCA STATE: IL ZIP: 60143 BUSINESS PHONE: 630-250-5100 MAIL ADDRESS: STREET 1: 1151 MAPLEWOOD DRIVE CITY: ITASCA STATE: IL ZIP: 60143 </SEC-HEADER> <DOCUMENT> <TYPE>4 <SEQUENCE>1 <FILENAME>form4.xml <DESCRIPTION>PRIMARY DOCUMENT <TEXT> <XML> <?xml version="1.0"?> <ownershipDocument> <schemaVersion>X0306</schemaVersion> <documentType>4</documentType> <periodOfReport>2019-02-04</periodOfReport> <issuer> <issuerCik>0001587523</issuerCik> <issuerName>Knowles Corp</issuerName> <issuerTradingSymbol>KN</issuerTradingSymbol> </issuer> <reportingOwner> <reportingOwnerId> <rptOwnerCik>0001449213</rptOwnerCik> <rptOwnerName>Polacek Michael S.</rptOwnerName> </reportingOwnerId> <reportingOwnerAddress> <rptOwnerStreet1>C/O KNOWLES CORPORATION</rptOwnerStreet1> <rptOwnerStreet2>1151 MAPLEWOOD DRIVE</rptOwnerStreet2> <rptOwnerCity>ITASCA</rptOwnerCity> <rptOwnerState>IL</rptOwnerState> <rptOwnerZipCode>60143</rptOwnerZipCode> <rptOwnerStateDescription></rptOwnerStateDescription> </reportingOwnerAddress> <reportingOwnerRelationship> <isOfficer>1</isOfficer> <officerTitle>President, Intelligent Audio</officerTitle> </reportingOwnerRelationship> </reportingOwner> <nonDerivativeTable> <nonDerivativeTransaction> <securityTitle> <value>Common Stock</value> </securityTitle> <transactionDate> <value>2019-02-04</value> </transactionDate> <transactionCoding> <transactionFormType>4</transactionFormType> <transactionCode>P</transactionCode> <equitySwapInvolved>0</equitySwapInvolved> <footnoteId id="F1"/> </transactionCoding> <transactionTimeliness></transactionTimeliness> <transactionAmounts> <transactionShares> <value>961</value> </transactionShares> <transactionPricePerShare> <value>15.6598</value> </transactionPricePerShare> <transactionAcquiredDisposedCode> <value>A</value> </transactionAcquiredDisposedCode> </transactionAmounts> <postTransactionAmounts> <sharesOwnedFollowingTransaction> <value>71711</value> </sharesOwnedFollowingTransaction> </postTransactionAmounts> <ownershipNature> <directOrIndirectOwnership> <value>D</value> </directOrIndirectOwnership> </ownershipNature> </nonDerivativeTransaction> </nonDerivativeTable> <footnotes> <footnote id="F1">The purchase reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on July 31, 2018.</footnote> </footnotes> <ownerSignature> <signatureName>/s/ Mark Pacioni, attorney-in-fact</signatureName> <signatureDate>2019-02-04</signatureDate> </ownerSignature> </ownershipDocument> </XML> </TEXT> </DOCUMENT> </SEC-DOCUMENT>