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<?xml version="1.0" encoding="windows-1252"?> |
<ownershipDocument> |
| <schemaVersion> X0306 </schemaVersion> |
| <documentType> 4/A </documentType> |
| <periodOfReport> 2021-02-19 </periodOfReport> |
| <dateOfOriginalSubmission> 2021-02-23 </dateOfOriginalSubmission> |
| <notSubjectToSection16> 0 </notSubjectToSection16> |
| <issuer> |
| | <issuerCik> 0001158114 </issuerCik> |
| | <issuerName> APPLIED OPTOELECTRONICS, INC. </issuerName> |
| | <issuerTradingSymbol> AAOI </issuerTradingSymbol> |
| | </issuer> |
| <reportingOwner> |
| | <reportingOwnerId> |
| | | <rptOwnerCik> 0001587600 </rptOwnerCik> |
| | | <rptOwnerName> Yeh Shu-Hua (Joshua) </rptOwnerName> |
| | | </reportingOwnerId> |
| | <reportingOwnerAddress> |
| | | <rptOwnerStreet1> C/O APPLIED OPTOELECTRONICS, INC. </rptOwnerStreet1> |
| | | <rptOwnerStreet2> 13139 JESS PIRTLE BLVD. </rptOwnerStreet2> |
| | | <rptOwnerCity> SUGAR LAND </rptOwnerCity> |
| | | <rptOwnerState> TX </rptOwnerState> |
| | | <rptOwnerZipCode> 77478 </rptOwnerZipCode> |
| | | <rptOwnerStateDescription></rptOwnerStateDescription> |
| | | </reportingOwnerAddress> |
| | <reportingOwnerRelationship> |
| | | <isDirector> 0 </isDirector> |
| | | <isOfficer> 1 </isOfficer> |
| | | <isTenPercentOwner> 0 </isTenPercentOwner> |
| | | <isOther> 0 </isOther> |
| | | <officerTitle> *** See Remarks </officerTitle> |
| | | <otherText></otherText> |
| | | </reportingOwnerRelationship> |
| | </reportingOwner> |
| <nonDerivativeTable> |
| | <nonDerivativeTransaction> |
| | | <securityTitle> |
| <value> Common Stock, $.001 par value </value> |
| </securityTitle> |
| | | <transactionDate> |
| <value> 2021-02-19 </value> |
| <footnoteId id="F1"/> |
| </transactionDate> |
| | | <deemedExecutionDate></deemedExecutionDate> |
| | | <transactionCoding> |
| <transactionFormType> 4 </transactionFormType> |
| <transactionCode> J </transactionCode> |
| <equitySwapInvolved> 0 </equitySwapInvolved> |
| <footnoteId id="F1"/> |
| </transactionCoding> |
| | | <transactionTimeliness></transactionTimeliness> |
| | | <transactionAmounts> |
| <transactionShares> |
| <value> 61562 </value> |
| <footnoteId id="F1"/> |
| </transactionShares> |
| <transactionPricePerShare> |
| <footnoteId id="F1"/> |
| </transactionPricePerShare> |
| <transactionAcquiredDisposedCode> |
| <value> D </value> |
| </transactionAcquiredDisposedCode> |
| </transactionAmounts> |
| | | <postTransactionAmounts> |
| <sharesOwnedFollowingTransaction> |
| <value> 141003 </value> |
| </sharesOwnedFollowingTransaction> |
| </postTransactionAmounts> |
| | | <ownershipNature> |
| <directOrIndirectOwnership> |
| <value> D </value> |
| </directOrIndirectOwnership> |
| </ownershipNature> |
| | | </nonDerivativeTransaction> |
| | </nonDerivativeTable> |
| <footnotes> |
| | <footnote id="F1"> On March 11, 2021, the Compensation Committee of the Company's Board of Directors rescinded its approval of the previously reported grant of Restricted Stock Units (RSUs) under the Company's 2013 Equity Incentive Plan, as amended, which the committee had approved in error, and voided and fully unwound such grant of RSUs effective as of February 19, 2021. </footnote> |
| | </footnotes> |
| <remarks> *** Senior Vice President and Asia General Manager </remarks> |
| <ownerSignature> |
| | <signatureName> /s/ David C. Kuo, attorney in fact for Shu-Hua (Joshua) Yeh </signatureName> |
| | <signatureDate> 2021-03-11 </signatureDate> |
| | </ownerSignature> |
| </ownershipDocument> |