<SEC-DOCUMENT>0001683168-25-008778.txt : 20251201
<SEC-HEADER>0001683168-25-008778.hdr.sgml : 20251201
<ACCEPTANCE-DATETIME>20251201171024
ACCESSION NUMBER:		0001683168-25-008778
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20251126
FILED AS OF DATE:		20251201
DATE AS OF CHANGE:		20251201

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			BLACK RICHARD B
		CENTRAL INDEX KEY:			0001199697
		ORGANIZATION NAME:           	

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-36083
		FILM NUMBER:		251540608

	MAIL ADDRESS:	
		STREET 1:		13139 JESS PIRTLE BLVD.
		CITY:			SUGAR LAND
		STATE:			TX
		ZIP:			77478

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			APPLIED OPTOELECTRONICS, INC.
		CENTRAL INDEX KEY:			0001158114
		STANDARD INDUSTRIAL CLASSIFICATION:	SEMICONDUCTORS & RELATED DEVICES [3674]
		ORGANIZATION NAME:           	04 Manufacturing
		EIN:				760533927
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		13139 JESS PIRTLE BLVD
		CITY:			SUGAR LAND
		STATE:			TX
		ZIP:			77478
		BUSINESS PHONE:		281-295-1800

	MAIL ADDRESS:	
		STREET 1:		13139 JESS PIRTLE BLVD
		CITY:			SUGAR LAND
		STATE:			TX
		ZIP:			77478

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	APPLIED OPTOELECTRONICS INC
		DATE OF NAME CHANGE:	20010824
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>ownership.xml
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0508</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2025-11-26</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001158114</issuerCik>
        <issuerName>APPLIED OPTOELECTRONICS, INC.</issuerName>
        <issuerTradingSymbol>AAOI</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001199697</rptOwnerCik>
            <rptOwnerName>BLACK RICHARD B</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>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle></officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <aff10b5One>0</aff10b5One>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock, $.001 par value</value>
            </securityTitle>
            <transactionDate>
                <value>2025-11-26</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>G</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
            </transactionCoding>
            <transactionTimeliness></transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>600</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0.00</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>169494</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>By Trust</value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Represents a bona fide gift of shares to a 501(c)(3) non-profit organization by The Richard B. Black Revocable Trust U/A Dtd. Aug 31, 1998; Richard B. Black TTEE, to which the reporting person contributed 4,121 shares of common stock on February 28, 2025, in a transaction that resulted in a change in form of beneficial ownership from direct to indirect. . The shares were held by the Reporting Person in a revocable living trust of which the Reporting Person is the trustee and beneficial owner.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ David C. Kuo, attorney in fact for Richard B. Black</signatureName>
        <signatureDate>2025-12-01</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
