<SEC-DOCUMENT>0001683168-25-003224.txt : 20250507
<SEC-HEADER>0001683168-25-003224.hdr.sgml : 20250507
<ACCEPTANCE-DATETIME>20250507155125
ACCESSION NUMBER:		0001683168-25-003224
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20250324
FILED AS OF DATE:		20250507
DATE AS OF CHANGE:		20250507

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			HEAD T JOE
		CENTRAL INDEX KEY:			0001231361
		ORGANIZATION NAME:           	

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-39608
		FILM NUMBER:		25921057

	MAIL ADDRESS:	
		STREET 1:		1101 EAST ARAPAHO ROAD
		CITY:			RICHARDSON
		STATE:			TX
		ZIP:			75081

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			INTRUSION INC
		CENTRAL INDEX KEY:			0000736012
		STANDARD INDUSTRIAL CLASSIFICATION:	COMPUTER COMMUNICATIONS EQUIPMENT [3576]
		ORGANIZATION NAME:           	06 Technology
		EIN:				751911917
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		101 EAST PARK BLVD, SUITE 1200
		CITY:			PLANO
		STATE:			TX
		ZIP:			75074
		BUSINESS PHONE:		(888) 637-7770

	MAIL ADDRESS:	
		STREET 1:		101 EAST PARK BLVD, SUITE 1200
		CITY:			PLANO
		STATE:			TX
		ZIP:			75074

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	INTRUSION COM INC
		DATE OF NAME CHANGE:	20000601

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	ODS NETWORKS INC
		DATE OF NAME CHANGE:	19970507

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	OPTICAL DATA SYSTEMS INC
		DATE OF NAME CHANGE:	19950517
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>ownership.xml
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0508</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2025-03-24</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000736012</issuerCik>
        <issuerName>INTRUSION INC</issuerName>
        <issuerTradingSymbol>INTZ</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001231361</rptOwnerCik>
            <rptOwnerName>HEAD T JOE</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O INTRUSION, INC.</rptOwnerStreet1>
            <rptOwnerStreet2>101 EAST PARK BLVD, SUITE 1200</rptOwnerStreet2>
            <rptOwnerCity>PLANO</rptOwnerCity>
            <rptOwnerState>TX</rptOwnerState>
            <rptOwnerZipCode>75074</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>Chief Technology Officer</officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <aff10b5One>0</aff10b5One>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
                <footnoteId id="F1"/>
            </securityTitle>
            <transactionDate>
                <value>2025-03-24</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness></transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>37385</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>2.18</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>83641</value>
                    <footnoteId id="F2"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Restricted stock units awarded to the reporting person as an equity incentive pursuant to the 2021 Intrusion Inc. Omnibus Incentive Plan as part of the compensation plan for employees. Restricted stock units fully vest on the anniversary of the award date.</footnote>
        <footnote id="F2">Includes 5,005 shares held by the Biblical Studies Foundation in which Mr. Head is President.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ T. Joe Head</signatureName>
        <signatureDate>2025-05-07</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
