<SEC-DOCUMENT>0001562180-23-001023.txt : 20230206
<SEC-HEADER>0001562180-23-001023.hdr.sgml : 20230206
<ACCEPTANCE-DATETIME>20230206153620
ACCESSION NUMBER:		0001562180-23-001023
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		2
CONFORMED PERIOD OF REPORT:	20230203
FILED AS OF DATE:		20230206
DATE AS OF CHANGE:		20230206

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Lowman Teresita M.
		CENTRAL INDEX KEY:			0001814953

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-10816
		FILM NUMBER:		23590512

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

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			MGIC INVESTMENT CORP
		CENTRAL INDEX KEY:			0000876437
		STANDARD INDUSTRIAL CLASSIFICATION:	SURETY INSURANCE [6351]
		IRS NUMBER:				391486475
		STATE OF INCORPORATION:			WI
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		250 EAST KILBOURN AVENUE
		CITY:			MILWAUKEE
		STATE:			WI
		ZIP:			53202
		BUSINESS PHONE:		4143476480

	MAIL ADDRESS:	
		STREET 1:		250 EAST KILBOURN AVENUE
		CITY:			MILWAUKEE
		STATE:			WI
		ZIP:			53202
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>primarydocument.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2023-02-03</periodOfReport>

    <notSubjectToSection16>false</notSubjectToSection16>

    <issuer>
        <issuerCik>0000876437</issuerCik>
        <issuerName>MGIC INVESTMENT CORP</issuerName>
        <issuerTradingSymbol>MTG</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001814953</rptOwnerCik>
            <rptOwnerName>Lowman Teresita M.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O MGIC INVESTMENT CORPORATION</rptOwnerStreet1>
            <rptOwnerStreet2>250 E. KILBOURN AVE.</rptOwnerStreet2>
            <rptOwnerCity>MILWAUKEE</rptOwnerCity>
            <rptOwnerState>WI</rptOwnerState>
            <rptOwnerZipCode>53202</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>true</isDirector>
            <isOfficer>false</isOfficer>
            <isTenPercentOwner>false</isTenPercentOwner>
            <isOther>false</isOther>
            <officerTitle></officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2023-02-03</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>false</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness></transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>8821.4538</value>
                    <footnoteId id="F1"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>14.17</value>
                    <footnoteId id="F2"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>16110.4083</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes>
        <footnote id="F1">These Restricted Stock Units (RSUs) will be settled in stock ten business days after February 1, 2024, unless a qualified election for a later distribution was made by the reporting person.</footnote>
        <footnote id="F2">These RSUs were awarded to the reporting person pursuant to the Issuer's 2020 Omnibus Incentive Plan and no price was paid by the reporting person for them.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>Leslie A. Schunk, Attorney-in-Fact</signatureName>
        <signatureDate>2023-02-06</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-24
<SEQUENCE>2
<FILENAME>lowman2022poa.txt
<DESCRIPTION>POWER OF ATTORNEY
<TEXT>
LIMITED POWER OF ATTORNEY

KNOW ALL BY THESE PRESENTS, that the undersigned is required, or may
be required in the future, to file reports of changes in beneficial
ownership of equity securities of MGIC Investment Corporation (the
"Company").

To facilitate the filing of these reports, the undersigned hereby
appoints each of Timothy A. Chrapko, Shelby E. Heinrich, Heidi A.
Heyrman, Paula C. Maggio, Brian M. Remington, Leslie A. Schunk, and
Martha F. Tsuchihashi as the undersigned's attorney-in-fact and agent
to: (i) apply on behalf of the undersigned for access codes (if
necessary) for the EDGAR System, and (ii) sign on behalf of the
undersigned and file any Form 3, Form 4, or Form 5 for the
undersigned with the Securities and Exchange Commission or any
securities exchange.

Each of the persons authorized to act as such attorney-in-fact and
agent above may do so separately without the concurrence of the other
persons.  The authority granted hereunder is granted to the person
occupying the position specified at the time such authority is
exercised.

Dated:   March 1, 2022
Signature:   /s/  Teresita M. Lowman
Please print or type name:       Teresita M. Lowman

ACKNOWLEDGMENT
STATE OF CALIFORNIA )
COUNTY OF SAN DIEGO  )

Before me, a Notary Public in and for the State of California, on this
day personally appeared Teresita M. Lowman, known to me to be the person
whose name is subscribed to the foregoing Limited Power of Attorney,
and acknowledged to me that he/she executed the same for the purposes
and consideration therein expressed.

Given under my hand and official seal this 1st day of March 2022.

(SEAL)
By:     /s/  Raj Wilfred Disouza
Notary Public, State of California
Print Name:   Raj Wilfred Disouza
My commission expires:  April 5, 2023
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
