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Premium service is only $9.99 a month.You can try our streaming API via WebSockets which will automate your trading <div><?xml version="1.0"?> <ownershipDocument> <schemaVersion>X0306</schemaVersion> <documentType>4</documentType> <periodOfReport>2022-09-22</periodOfReport> <issuer> <issuerCik>0001499422</issuerCik> <issuerName>RBB Bancorp</issuerName> <issuerTradingSymbol>RBB</issuerTradingSymbol> </issuer> <reportingOwner> <reportingOwnerId> <rptOwnerCik>0001711604</rptOwnerCik> <rptOwnerName>Chen Wendell</rptOwnerName> </reportingOwnerId> <reportingOwnerAddress> <rptOwnerStreet1>1055 WILSHIRE BLVD</rptOwnerStreet1> <rptOwnerStreet2>SUITE 1200</rptOwnerStreet2> <rptOwnerCity>LOS ANGELES</rptOwnerCity> <rptOwnerState>CA</rptOwnerState> <rptOwnerZipCode>90017</rptOwnerZipCode> <rptOwnerStateDescription></rptOwnerStateDescription> </reportingOwnerAddress> <reportingOwnerRelationship> <isDirector>1</isDirector> </reportingOwnerRelationship> </reportingOwner> <nonDerivativeTable> <nonDerivativeTransaction> <securityTitle> <value>Common Stock, No Par Value</value> </securityTitle> <transactionDate> <value>2022-09-22</value> </transactionDate> <transactionCoding> <transactionFormType>4</transactionFormType> <transactionCode>M</transactionCode> <equitySwapInvolved>0</equitySwapInvolved> </transactionCoding> <transactionAmounts> <transactionShares> <value>10763</value> </transactionShares> <transactionPricePerShare> <value>11.1498</value> </transactionPricePerShare> <transactionAcquiredDisposedCode> <value>A</value> </transactionAcquiredDisposedCode> </transactionAmounts> <postTransactionAmounts> <sharesOwnedFollowingTransaction> <value>90471</value> </sharesOwnedFollowingTransaction> </postTransactionAmounts> <ownershipNature> <directOrIndirectOwnership> <value>D</value> </directOrIndirectOwnership> </ownershipNature> </nonDerivativeTransaction> </nonDerivativeTable> <derivativeTable> <derivativeTransaction> <securityTitle> <value>Option (right to buy)</value> </securityTitle> <conversionOrExercisePrice> <value>11.1498</value> </conversionOrExercisePrice> <transactionDate> <value>2022-09-22</value> </transactionDate> <transactionCoding> <transactionFormType>4</transactionFormType> <transactionCode>M</transactionCode> <equitySwapInvolved>0</equitySwapInvolved> </transactionCoding> <transactionAmounts> <transactionShares> <value>10763</value> </transactionShares> <transactionPricePerShare> <value>11.149</value> </transactionPricePerShare> <transactionAcquiredDisposedCode> <value>D</value> </transactionAcquiredDisposedCode> </transactionAmounts> <exerciseDate> <footnoteId id="F1"/> </exerciseDate> <expirationDate> <value>2023-05-15</value> </expirationDate> <underlyingSecurity> <underlyingSecurityTitle> <value>Common Stock</value> </underlyingSecurityTitle> <underlyingSecurityShares> <value>10763</value> </underlyingSecurityShares> </underlyingSecurity> <postTransactionAmounts> <sharesOwnedFollowingTransaction> <value>0</value> </sharesOwnedFollowingTransaction> </postTransactionAmounts> <ownershipNature> <directOrIndirectOwnership> <value>D</value> </directOrIndirectOwnership> </ownershipNature> </derivativeTransaction> <derivativeHolding> <securityTitle> <value>Option (right to buy)</value> </securityTitle> <conversionOrExercisePrice> <value>13.2098</value> </conversionOrExercisePrice> <exerciseDate> <footnoteId id="F2"/> </exerciseDate> <expirationDate> <value>2024-05-21</value> </expirationDate> <underlyingSecurity> <underlyingSecurityTitle> <value>Common Stock</value> </underlyingSecurityTitle> <underlyingSecurityShares> <value>10250</value> </underlyingSecurityShares> </underlyingSecurity> <postTransactionAmounts> <sharesOwnedFollowingTransaction> <value>10250</value> </sharesOwnedFollowingTransaction> </postTransactionAmounts> <ownershipNature> <directOrIndirectOwnership> <value>D</value> </directOrIndirectOwnership> </ownershipNature> </derivativeHolding> <derivativeHolding> <securityTitle> <value>Option (right to buy)</value> </securityTitle> <conversionOrExercisePrice> <value>17.0800</value> </conversionOrExercisePrice> <exerciseDate> <footnoteId id="F3"/> </exerciseDate> <expirationDate> <value>2025-05-20</value> </expirationDate> <underlyingSecurity> <underlyingSecurityTitle> <value>Common Stock</value> </underlyingSecurityTitle> <underlyingSecurityShares> <value>10000</value> </underlyingSecurityShares> </underlyingSecurity> <postTransactionAmounts> <sharesOwnedFollowingTransaction> <value>10000</value> </sharesOwnedFollowingTransaction> </postTransactionAmounts> <ownershipNature> <directOrIndirectOwnership> <value>D</value> </directOrIndirectOwnership> </ownershipNature> </derivativeHolding> <derivativeHolding> <securityTitle> <value>Option (right to buy)</value> </securityTitle> <conversionOrExercisePrice> <value>18.2500</value> </conversionOrExercisePrice> <exerciseDate> <footnoteId id="F4"/> </exerciseDate> <expirationDate> <value>2026-05-17</value> </expirationDate> <underlyingSecurity> <underlyingSecurityTitle> <value>Common Stock</value> </underlyingSecurityTitle> <underlyingSecurityShares> <value>10000</value> </underlyingSecurityShares> </underlyingSecurity> <postTransactionAmounts> <sharesOwnedFollowingTransaction> <value>10000</value> </sharesOwnedFollowingTransaction> </postTransactionAmounts> <ownershipNature> <directOrIndirectOwnership> <value>D</value> </directOrIndirectOwnership> </ownershipNature> </derivativeHolding> <derivativeHolding> <securityTitle> <value>Restricted Stock Units</value> </securityTitle> <conversionOrExercisePrice> <value>0.0000</value> </conversionOrExercisePrice> <exerciseDate> <footnoteId id="F5"/> </exerciseDate> <expirationDate> <footnoteId id="F6"/> </expirationDate> <underlyingSecurity> <underlyingSecurityTitle> <value>Restricted Stock Units</value> </underlyingSecurityTitle> <underlyingSecurityShares> <value>500</value> </underlyingSecurityShares> </underlyingSecurity> <postTransactionAmounts> <sharesOwnedFollowingTransaction> <value>500</value> </sharesOwnedFollowingTransaction> </postTransactionAmounts> <ownershipNature> <directOrIndirectOwnership> <value>D</value> </directOrIndirectOwnership> </ownershipNature> </derivativeHolding> </derivativeTable> <footnotes> <footnote id="F1">These options vest in three equal annual installments beginning one year after the 05/15/2013 date of grant.</footnote> <footnote id="F2">These options vest in three equal annual installments beginning one year after the 05/21/2014 date of grant.</footnote> <footnote id="F3">These options vest in three equal annual installments beginning one year after the 05/20/2015 date of grant.</footnote> <footnote id="F4">These options vest in three equal annual installments beginning one year after the 05/17/2016 date of grant.</footnote> <footnote id="F5">These restricted stock units vest in two installments: 500 at 07/21/2022 and 500 at 01/19/2023.</footnote> <footnote id="F6">There will be no expiration date once restricted stock units vest.</footnote> </footnotes> <remarks>Wendell Chen exercised 10,763 options on 09/22/2022.</remarks> <ownerSignature> <signatureName>/s/ Wendell Chen</signatureName> <signatureDate>2022-09-23</signatureDate> </ownerSignature> </ownershipDocument> <br></div> More