<SEC-DOCUMENT>0001193125-26-239727.txt : 20260526
<SEC-HEADER>0001193125-26-239727.hdr.sgml : 20260526
<ACCEPTANCE-DATETIME>20260526174454
ACCESSION NUMBER:		0001193125-26-239727
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20260520
FILED AS OF DATE:		20260526
DATE AS OF CHANGE:		20260526

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Matz Gregory W
		CENTRAL INDEX KEY:			0001536574
		ORGANIZATION NAME:           	

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-38371
		FILM NUMBER:		261021351

	MAIL ADDRESS:	
		STREET 1:		1 WHITE OAK WAY
		CITY:			NOVATO
		STATE:			CA
		ZIP:			94949

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			ONE STOP SYSTEMS, INC.
		CENTRAL INDEX KEY:			0001394056
		STANDARD INDUSTRIAL CLASSIFICATION:	ELECTRONIC COMPUTERS [3571]
		ORGANIZATION NAME:           	06 Technology
		EIN:				330885351
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		2235 ENTERPRISE ST STE 110
		CITY:			ESCONDIDO
		STATE:			CA
		ZIP:			92029
		BUSINESS PHONE:		760-745-9883

	MAIL ADDRESS:	
		STREET 1:		2235 ENTERPRISE ST STE 110
		CITY:			ESCONDIDO
		STATE:			CA
		ZIP:			92029

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	ONE STOP SYSTEMS INC
		DATE OF NAME CHANGE:	20070322
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>ownership.xml
<DESCRIPTION>4
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0609</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2026-05-20</periodOfReport>

    <issuer>
        <issuerCik>0001394056</issuerCik>
        <issuerName>ONE STOP SYSTEMS, INC.</issuerName>
        <issuerTradingSymbol>OSS</issuerTradingSymbol>
        <issuerForeignTradingSymbol></issuerForeignTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001536574</rptOwnerCik>
            <rptOwnerName>Matz Gregory W</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerNonUSAddressFlag>false</rptOwnerNonUSAddressFlag>
            <rptOwnerStreet1>2235 ENTERPRISE STREET #110</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>ESCONDIDO</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>92029</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>true</isDirector>
            <isOfficer>false</isOfficer>
            <isTenPercentOwner>false</isTenPercentOwner>
            <isOther>false</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <aff10b5One>false</aff10b5One>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2026-05-20</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>false</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>11984</value>
                    <footnoteId id="F1"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>86914</value>
                    <footnoteId id="F2"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2026-05-26</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>false</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>8000</value>
                    <footnoteId id="F3"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>17.52</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>78914</value>
                    <footnoteId id="F4"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Represents 11,984 restricted stock units granted to the Reporting Person under the Issuer's 2017 Equity Incentive Plan, as amended (the &quot;Plan&quot;), in connection with the Reporting Person's service as a director of the Issuer, which restricted stock units are subject to vesting conditions.</footnote>
        <footnote id="F2">Includes 11,984 unvested restricted stock units held by the Reporting Person, all of which remain subject to certain vesting conditions and 74,930 shares of common stock.</footnote>
        <footnote id="F3">The Reporting Person sold 8,000 shares of common stock upon conversion of an aggregate 21,000 vested and outstanding restricted stock units into shares of common stock to cover tax withholdings, using the market price of the issuer's common stock at the time of sale. These restricted stock units were part of the grant reported in Table I of the Form 4 filed by the Reporting Person with the Securities and Exchange Commission on May 23, 2025.</footnote>
        <footnote id="F4">Includes 11,984 unvested restricted stock units held by the Reporting Person, all of which remain subject to certain vesting conditions and 66,930 shares of common stock.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ Gregory Matz</signatureName>
        <signatureDate>2026-05-26</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
