<SEC-DOCUMENT>0001683168-21-000910.txt : 20210312
<SEC-HEADER>0001683168-21-000910.hdr.sgml : 20210312
<ACCEPTANCE-DATETIME>20210312122405
ACCESSION NUMBER:		0001683168-21-000910
CONFORMED SUBMISSION TYPE:	3
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20210205
FILED AS OF DATE:		20210312
DATE AS OF CHANGE:		20210312

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			MCCALLUM KATRINKA
		CENTRAL INDEX KEY:			0001201242
		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-PREPACKAGED SOFTWARE [7372]
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-39608
		FILM NUMBER:		21736285

	BUSINESS ADDRESS:	
		STREET 1:		139 TOWNSEND ST
		STREET 2:		MEZZANINE FLOOR
		CITY:			SAN FRANCISCO
		STATE:			CA
		ZIP:			94107
		BUSINESS PHONE:		4155389090

	MAIL ADDRESS:	
		STREET 1:		139 TOWNSEND ST
		CITY:			SAN FRANCISCO
		STATE:			CA
		ZIP:			94107

ISSUER:		

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

	BUSINESS ADDRESS:	
		STREET 1:		101 EAST PARK BLVD, SUITE 1300
		CITY:			PLANO
		STATE:			TX
		ZIP:			75074
		BUSINESS PHONE:		9722346400

	MAIL ADDRESS:	
		STREET 1:		101 EAST PARK BLVD, SUITE 1300
		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>3
<SEQUENCE>1
<FILENAME>ownership.xml
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0206</schemaVersion>

    <documentType>3</documentType>

    <periodOfReport>2021-02-05</periodOfReport>

    <noSecuritiesOwned>1</noSecuritiesOwned>

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

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001201242</rptOwnerCik>
            <rptOwnerName>MCCALLUM KATRINKA</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>103 E. PARK BLVD. SUITE 1300</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>PLANO</rptOwnerCity>
            <rptOwnerState>TX</rptOwnerState>
            <rptOwnerZipCode>75074</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle></officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <ownerSignature>
        <signatureName>/s/ Katrinka McCallam</signatureName>
        <signatureDate>2021-03-12</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
