<SEC-DOCUMENT>0000899243-20-025654.txt : 20200917 <SEC-HEADER>0000899243-20-025654.hdr.sgml : 20200917 <ACCEPTANCE-DATETIME>20200917215549 ACCESSION NUMBER: 0000899243-20-025654 CONFORMED SUBMISSION TYPE: 4 PUBLIC DOCUMENT COUNT: 1 CONFORMED PERIOD OF REPORT: 20200915 FILED AS OF DATE: 20200917 DATE AS OF CHANGE: 20200917 REPORTING-OWNER: OWNER DATA: COMPANY CONFORMED NAME: Schindel Yair Chaim CENTRAL INDEX KEY: 0001823758 FILING VALUES: FORM TYPE: 4 SEC ACT: 1934 Act SEC FILE NUMBER: 001-38359 FILM NUMBER: 201182681 MAIL ADDRESS: STREET 1: YERUSHALAYIM ROAD 34 STREET 2: BEIT GAMLA ENTRANCE B CITY: RA'ANANA STATE: L3 ZIP: 4350110 ISSUER: COMPANY DATA: COMPANY CONFORMED NAME: Adicet Bio, Inc. CENTRAL INDEX KEY: 0001720580 STANDARD INDUSTRIAL CLASSIFICATION: PHARMACEUTICAL PREPARATIONS [2834] IRS NUMBER: 813305277 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 BUSINESS ADDRESS: STREET 1: 500 BOYLSTON STREET STREET 2: 12TH FLOOR CITY: BOSTON STATE: MA ZIP: 02116 BUSINESS PHONE: 617-482-2333 MAIL ADDRESS: STREET 1: 500 BOYLSTON STREET STREET 2: 12TH FLOOR CITY: BOSTON STATE: MA ZIP: 02116 FORMER COMPANY: FORMER CONFORMED NAME: resTORbio, Inc. DATE OF NAME CHANGE: 20171024 </SEC-HEADER> <DOCUMENT> <TYPE>4 <SEQUENCE>1 <FILENAME>doc4.xml <DESCRIPTION>FORM 4 SUBMISSION <TEXT> <XML> <?xml version="1.0"?> <ownershipDocument> <schemaVersion>X0306</schemaVersion> <documentType>4</documentType> <periodOfReport>2020-09-15</periodOfReport> <notSubjectToSection16>0</notSubjectToSection16> <issuer> <issuerCik>0001720580</issuerCik> <issuerName>Adicet Bio, Inc.</issuerName> <issuerTradingSymbol>ACET</issuerTradingSymbol> </issuer> <reportingOwner> <reportingOwnerId> <rptOwnerCik>0001823758</rptOwnerCik> <rptOwnerName>Schindel Yair Chaim</rptOwnerName> </reportingOwnerId> <reportingOwnerAddress> <rptOwnerStreet1>C/O ADICET BIO, INC.</rptOwnerStreet1> <rptOwnerStreet2>500 BOYLSTON STREET, 13TH FLOOR</rptOwnerStreet2> <rptOwnerCity>BOSTON</rptOwnerCity> <rptOwnerState>MA</rptOwnerState> <rptOwnerZipCode>02116</rptOwnerZipCode> <rptOwnerStateDescription></rptOwnerStateDescription> </reportingOwnerAddress> <reportingOwnerRelationship> <isDirector>1</isDirector> <isOfficer>0</isOfficer> <isTenPercentOwner>0</isTenPercentOwner> <isOther>0</isOther> </reportingOwnerRelationship> </reportingOwner> <nonDerivativeTable> <nonDerivativeTransaction> <securityTitle> <value>Common Stock</value> </securityTitle> <transactionDate> <value>2020-09-15</value> </transactionDate> <deemedExecutionDate></deemedExecutionDate> <transactionCoding> <transactionFormType>4</transactionFormType> <transactionCode>A</transactionCode> <equitySwapInvolved>0</equitySwapInvolved> </transactionCoding> <transactionTimeliness> <value></value> </transactionTimeliness> <transactionAmounts> <transactionShares> <value>1104460</value> <footnoteId id="F1"/> </transactionShares> <transactionPricePerShare> <footnoteId id="F2"/> </transactionPricePerShare> <transactionAcquiredDisposedCode> <value>A</value> </transactionAcquiredDisposedCode> </transactionAmounts> <postTransactionAmounts> <sharesOwnedFollowingTransaction> <value>1104460</value> </sharesOwnedFollowingTransaction> </postTransactionAmounts> <ownershipNature> <directOrIndirectOwnership> <value>I</value> </directOrIndirectOwnership> <natureOfOwnership> <value>By aMoon 2 Fund Limited Partnership</value> </natureOfOwnership> </ownershipNature> </nonDerivativeTransaction> </nonDerivativeTable> <derivativeTable> <derivativeTransaction> <securityTitle> <value>Non-Qualified Stock Option (right to buy)</value> </securityTitle> <conversionOrExercisePrice> <value>16.11</value> </conversionOrExercisePrice> <transactionDate> <value>2020-09-17</value> </transactionDate> <deemedExecutionDate></deemedExecutionDate> <transactionCoding> <transactionFormType>4</transactionFormType> <transactionCode>A</transactionCode> <equitySwapInvolved>0</equitySwapInvolved> </transactionCoding> <transactionTimeliness> <value></value> </transactionTimeliness> <transactionAmounts> <transactionShares> <value>30000</value> </transactionShares> <transactionPricePerShare> <value>0.00</value> </transactionPricePerShare> <transactionAcquiredDisposedCode> <value>A</value> </transactionAcquiredDisposedCode> </transactionAmounts> <exerciseDate> <footnoteId id="F3"/> </exerciseDate> <expirationDate> <value>2030-09-16</value> </expirationDate> <underlyingSecurity> <underlyingSecurityTitle> <value>Common Stock</value> </underlyingSecurityTitle> <underlyingSecurityShares> <value>30000</value> </underlyingSecurityShares> </underlyingSecurity> <postTransactionAmounts> <sharesOwnedFollowingTransaction> <value>30000</value> </sharesOwnedFollowingTransaction> </postTransactionAmounts> <ownershipNature> <directOrIndirectOwnership> <value>D</value> </directOrIndirectOwnership> </ownershipNature> </derivativeTransaction> </derivativeTable> <footnotes> <footnote id="F1">The reporting person is the sole shareholder of aMoon General Partner Ltd., which is the sole general partner of aMoon 2 Fund G.P. Limited Partnership, which is the sole general partner of aMoon 2 Fund Limited Partnership, which directly holds the reported securities. The reporting person disclaims beneficial ownership of the reported securities except to the extent of his pecuniary interest therein.</footnote> <footnote id="F2">Received in exchange for shares of Series B Preferred Stock of Adicet Bio, Inc., a Delaware corporation ("Old Adicet"), in connection with the merger (the "Merger") of Old Adicet with and into Project Oasis Merger Sub, Inc., a Delaware corporation and a wholly owned subsidiary of resTORbio, Inc., a Delaware corporation ("resTORbio"). On the effective date of the Merger, the closing share price of a share of resTORbio common stock was $2.28 per share. On the effective date of the Merger, resTorbio changed its name to "Adicet Bio, Inc."</footnote> <footnote id="F3">The shares of common stock subject to the option shall vest in equal installments on each of the thirty-six (36) monthly anniversaries of the vesting commencement date, provided that the reporting person remains in continuous service as of the applicable vesting date.</footnote> </footnotes> <remarks></remarks> <ownerSignature> <signatureName>/s/ Nick Harvey, Attorney-in-Fact for Yair C. Schindel</signatureName> <signatureDate>2020-09-17</signatureDate> </ownerSignature> </ownershipDocument> </XML> </TEXT> </DOCUMENT> </SEC-DOCUMENT>