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<?xml version="1.0" encoding="windows-1252"?> |
<ownershipDocument> |
| <schemaVersion> X0206 </schemaVersion> |
| <documentType> 3 </documentType> |
| <periodOfReport> 2021-05-04 </periodOfReport> |
| <noSecuritiesOwned> 1 </noSecuritiesOwned> |
| <issuer> |
| | <issuerCik> 0001530950 </issuerCik> |
| | <issuerName> Post Holdings, Inc. </issuerName> |
| | <issuerTradingSymbol> POST </issuerTradingSymbol> |
| | </issuer> |
| <reportingOwner> |
| | <reportingOwnerId> |
| | | <rptOwnerCik> 0001790648 </rptOwnerCik> |
| | | <rptOwnerName> JOHNSON JENNIFER KUPERMAN </rptOwnerName> |
| | | </reportingOwnerId> |
| | <reportingOwnerAddress> |
| | | <rptOwnerStreet1> C/O POST HOLDINGS, INC. </rptOwnerStreet1> |
| | | <rptOwnerStreet2> 2503 S. HANLEY ROAD </rptOwnerStreet2> |
| | | <rptOwnerCity> ST. LOUIS </rptOwnerCity> |
| | | <rptOwnerState> MO </rptOwnerState> |
| | | <rptOwnerZipCode> 63144 </rptOwnerZipCode> |
| | | <rptOwnerStateDescription></rptOwnerStateDescription> |
| | | </reportingOwnerAddress> |
| | <reportingOwnerRelationship> |
| | | <isDirector> 1 </isDirector> |
| | | <isOfficer> 0 </isOfficer> |
| | | <isTenPercentOwner> 0 </isTenPercentOwner> |
| | | <isOther> 0 </isOther> |
| | | <officerTitle></officerTitle> |
| | | <otherText></otherText> |
| | | </reportingOwnerRelationship> |
| | </reportingOwner> |
| <nonDerivativeTable></nonDerivativeTable> |
| <derivativeTable></derivativeTable> |
| <footnotes></footnotes> |
| <remarks> See attached Exhibit 24 - Power of Attorney </remarks> |
| <ownerSignature> |
| | <signatureName> /s/ Diedre J. Gray, Attorney-in-Fact </signatureName> |
| | <signatureDate> 2021-05-14 </signatureDate> |
| | </ownerSignature> |
| </ownershipDocument> |