<SEC-DOCUMENT>0000950170-25-004913.txt : 20250113
<SEC-HEADER>0000950170-25-004913.hdr.sgml : 20250113
<ACCEPTANCE-DATETIME>20250113172923
ACCESSION NUMBER:		0000950170-25-004913
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20241231
FILED AS OF DATE:		20250113
DATE AS OF CHANGE:		20250113

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			JANKOWSKI JESS
		CENTRAL INDEX KEY:			0001184478
		ORGANIZATION NAME:           	

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-22333
		FILM NUMBER:		25527166

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			NANOPHASE TECHNOLOGIES Corp
		CENTRAL INDEX KEY:			0000883107
		STANDARD INDUSTRIAL CLASSIFICATION:	PERFUMES, COSMETICS & OTHER TOILET PREPARATIONS [2844]
		ORGANIZATION NAME:           	08 Industrial Applications and Services
		IRS NUMBER:				363687863
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		1319 MARQUETTE DRIVE
		CITY:			ROMEOVILLE
		STATE:			IL
		ZIP:			60446
		BUSINESS PHONE:		6303231200

	MAIL ADDRESS:	
		STREET 1:		1319 MARQUETTE DRIVE
		CITY:			ROMEOVILLE
		STATE:			IL
		ZIP:			60446

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	NANOPHASE TECHNOLOGIES CORPORATION
		DATE OF NAME CHANGE:	19970305
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>ownership.xml
<DESCRIPTION>4
<TEXT>
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<?xml version="1.0"?>
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    <schemaVersion>X0508</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2024-12-31</periodOfReport>

    <issuer>
        <issuerCik>0000883107</issuerCik>
        <issuerName>NANOPHASE TECHNOLOGIES Corp</issuerName>
        <issuerTradingSymbol>NANX</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001184478</rptOwnerCik>
            <rptOwnerName>JANKOWSKI JESS</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>1319 MARQUETTE DRIVE</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>ROMEOVILLE</rptOwnerCity>
            <rptOwnerState>IL</rptOwnerState>
            <rptOwnerZipCode>60446</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>true</isDirector>
            <isOfficer>true</isOfficer>
            <isTenPercentOwner>false</isTenPercentOwner>
            <isOther>false</isOther>
            <officerTitle>President, CEO</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <aff10b5One>false</aff10b5One>

    <nonDerivativeTable>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>1000</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>Spouse's IRA</value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
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                    <value>207450</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
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        </nonDerivativeHolding>
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    <derivativeTable>
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            <exerciseDate>
                <value>2017-02-23</value>
                <footnoteId id="F1"/>
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            <expirationDate>
                <value>2026-02-23</value>
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            <securityTitle>
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                <value>2020-05-22</value>
                <footnoteId id="F1"/>
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            <expirationDate>
                <value>2029-05-22</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
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                <underlyingSecurityShares>
                    <value>16500</value>
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                <sharesOwnedFollowingTransaction>
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            <exerciseDate>
                <value>2021-06-18</value>
                <footnoteId id="F1"/>
            </exerciseDate>
            <expirationDate>
                <value>2027-06-18</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>90000</value>
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            </underlyingSecurity>
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                <sharesOwnedFollowingTransaction>
                    <value>90000</value>
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        </derivativeHolding>
        <derivativeHolding>
            <securityTitle>
                <value>Common Stock (right to purchase)</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>4.17</value>
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            <exerciseDate>
                <value>2022-12-28</value>
                <footnoteId id="F1"/>
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            <expirationDate>
                <value>2028-12-28</value>
            </expirationDate>
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                </underlyingSecurityTitle>
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                <sharesOwnedFollowingTransaction>
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                </sharesOwnedFollowingTransaction>
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        </derivativeHolding>
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            <securityTitle>
                <value>Common Stock (right to purchase)</value>
            </securityTitle>
            <conversionOrExercisePrice>
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                <sharesOwnedFollowingTransaction>
                    <value>72000</value>
                </sharesOwnedFollowingTransaction>
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                <directOrIndirectOwnership>
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                </directOrIndirectOwnership>
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        </derivativeHolding>
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            <securityTitle>
                <value>Common Stock (right to purchase)</value>
            </securityTitle>
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            </conversionOrExercisePrice>
            <exerciseDate>
                <value>2024-12-27</value>
                <footnoteId id="F1"/>
            </exerciseDate>
            <expirationDate>
                <value>2030-12-27</value>
            </expirationDate>
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                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>12600</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
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                <sharesOwnedFollowingTransaction>
                    <value>12600</value>
                </sharesOwnedFollowingTransaction>
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                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
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        </derivativeHolding>
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            <securityTitle>
                <value>Common Stock (right to purchase)</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>2.44</value>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2024-12-31</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>false</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>22500</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>2.44</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
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            <exerciseDate>
                <value>2025-12-31</value>
                <footnoteId id="F1"/>
            </exerciseDate>
            <expirationDate>
                <value>2031-12-31</value>
            </expirationDate>
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                <underlyingSecurityTitle>
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                </underlyingSecurityTitle>
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                </underlyingSecurityShares>
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                <sharesOwnedFollowingTransaction>
                    <value>22500</value>
                </sharesOwnedFollowingTransaction>
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            <ownershipNature>
                <directOrIndirectOwnership>
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        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">Subject to certain restrictions, beginning on this date, options vest in three equal annual installments.</footnote>
    </footnotes>

    <remarks>This report is being filed late due to an administrative error on the part of the Company.  Mr. Jankowski received this grant of stock options as part of the Company's annual equity compensation practices.</remarks>

    <ownerSignature>
        <signatureName>/s/ Jess Jankowski</signatureName>
        <signatureDate>2025-01-13</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
