<SEC-DOCUMENT>0001401521-21-000166.txt : 20210923
<SEC-HEADER>0001401521-21-000166.hdr.sgml : 20210923
<ACCEPTANCE-DATETIME>20210923164443
ACCESSION NUMBER:		0001401521-21-000166
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20210922
FILED AS OF DATE:		20210923
DATE AS OF CHANGE:		20210923

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			MARTZ BRAD
		CENTRAL INDEX KEY:			0001557785

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-52833
		FILM NUMBER:		211272997

	MAIL ADDRESS:	
		STREET 1:		C/O UNITED INSURANCE HOLDINGS CORP.
		STREET 2:		360 CENTRAL AVE., SUITE 900
		CITY:			ST. PETERSBURG
		STATE:			FL
		ZIP:			33701

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			UNITED INSURANCE HOLDINGS CORP.
		CENTRAL INDEX KEY:			0001401521
		STANDARD INDUSTRIAL CLASSIFICATION:	FIRE, MARINE & CASUALTY INSURANCE [6331]
		IRS NUMBER:				753241967
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		800 2ND AVE S
		CITY:			SAINT PETERSBURG
		STATE:			FL
		ZIP:			33701
		BUSINESS PHONE:		727-895-7737

	MAIL ADDRESS:	
		STREET 1:		800 2ND AVE S
		CITY:			SAINT PETERSBURG
		STATE:			FL
		ZIP:			33701

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	FMG ACQUISITION CORP
		DATE OF NAME CHANGE:	20070531
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>wf-form4_163242986977636.xml
<DESCRIPTION>FORM 4
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2021-09-22</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001401521</issuerCik>
        <issuerName>UNITED INSURANCE HOLDINGS CORP.</issuerName>
        <issuerTradingSymbol>UIHC</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001557785</rptOwnerCik>
            <rptOwnerName>MARTZ BRAD</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O UNITED INSURANCE HOLDINGS CORP.</rptOwnerStreet1>
            <rptOwnerStreet2>800 2ND AVENUE S.</rptOwnerStreet2>
            <rptOwnerCity>ST. PETERSBURG</rptOwnerCity>
            <rptOwnerState>FL</rptOwnerState>
            <rptOwnerZipCode>33701</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>President &amp; CFO</officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2021-09-22</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>P</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>7500</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>3.37</value>
                    <footnoteId id="F1"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>74945</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes>
        <footnote id="F1">The reported price in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $3.366 to $3.38 per share. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or to the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the range set forth in this footnote.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Jessica Strathman, Attorney-in-Fact for Brad Martz</signatureName>
        <signatureDate>2021-09-23</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
