<SEC-DOCUMENT>0001194794-17-000157.txt : 20171011
<SEC-HEADER>0001194794-17-000157.hdr.sgml : 20171011
<ACCEPTANCE-DATETIME>20171011143334
ACCESSION NUMBER:		0001194794-17-000157
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20171010
FILED AS OF DATE:		20171011
DATE AS OF CHANGE:		20171011

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			HAYDAR ZIAD
		CENTRAL INDEX KEY:			0001642842

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-16533
		FILM NUMBER:		171132446

	MAIL ADDRESS:	
		STREET 1:		4600 EDMUNDSON ROAD
		CITY:			ST LOUIS
		STATE:			MO
		ZIP:			63134

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			PROASSURANCE CORP
		CENTRAL INDEX KEY:			0001127703
		STANDARD INDUSTRIAL CLASSIFICATION:	FIRE, MARINE & CASUALTY INSURANCE [6331]
		IRS NUMBER:				631261433
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		100 BROOKWOOD PLACE
		CITY:			BIRMINGHAM
		STATE:			AL
		ZIP:			35209
		BUSINESS PHONE:		2058774400
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>wf-form4_150774680106394.xml
<DESCRIPTION>FORM 4
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2017-10-10</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001127703</issuerCik>
        <issuerName>PROASSURANCE CORP</issuerName>
        <issuerTradingSymbol>PRA</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001642842</rptOwnerCik>
            <rptOwnerName>HAYDAR ZIAD</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>100 BROOKWOOD PLACE</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>BIRMINGHAM</rptOwnerCity>
            <rptOwnerState>AL</rptOwnerState>
            <rptOwnerZipCode>35209</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle></officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2017-10-10</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>20</value>
                    <footnoteId id="F1"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>55.50</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>6687</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes>
        <footnote id="F1">These shares were acquired from ProAssurance Corporation under its Director Deferred Stock Compensation Plan (the &quot;Plan&quot;) and are exempt under Rule 16b-3. The Board of Directors may grant shares to directors at each annual meeting as part of their compensation and directors may elect to defer payment of the shares under the Plan. Any deferred shares are then credited to the electing director's account under the Plan, and accrue dividends as permitted by the Plan. On each subsequent dividend payment date, the accrued dividends are credited to the directors' deferred stock accounts as additional whole shares of deferred stock at the market price on the dividend payment date. Amounts attributable to fractional shares are denominated in dollars and applied toward additional shares of deferred stock on the next dividend payment date. Deferred stock will be paid solely in our shares of stock when the deferred stock is payable to the directors.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>Frank B. O'Neil, with Power of Attorney for the Reporting Person</signatureName>
        <signatureDate>2017-10-11</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
