<SEC-DOCUMENT>0001066605-25-000055.txt : 20250624
<SEC-HEADER>0001066605-25-000055.hdr.sgml : 20250624
<ACCEPTANCE-DATETIME>20250624163047
ACCESSION NUMBER:		0001066605-25-000055
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20250309
FILED AS OF DATE:		20250624
DATE AS OF CHANGE:		20250624

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Heaton Tracey
		CENTRAL INDEX KEY:			0001896402
		ORGANIZATION NAME:           	

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-25837
		FILM NUMBER:		251069624

	MAIL ADDRESS:	
		STREET 1:		C/O HEIDRICK & STRUGGLES INT'L, INC.
		STREET 2:		233 S. WACKER DR. SUITE 4900
		CITY:			CHICAGO
		STATE:			IL
		ZIP:			60606

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			HEIDRICK & STRUGGLES INTERNATIONAL INC
		CENTRAL INDEX KEY:			0001066605
		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-EMPLOYMENT AGENCIES [7361]
		ORGANIZATION NAME:           	07 Trade & Services
		EIN:				362681268
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		233 S WACKER DRIVE
		STREET 2:		SUITE 4900
		CITY:			CHICAGO
		STATE:			IL
		ZIP:			60606-6303
		BUSINESS PHONE:		3124961200

	MAIL ADDRESS:	
		STREET 1:		233 S WACKER DRIVE
		STREET 2:		SUITE 4900
		CITY:			CHICAGO
		STATE:			IL
		ZIP:			60606
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>wk-form4_1750797040.xml
<DESCRIPTION>FORM 4
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0508</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2025-03-09</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001066605</issuerCik>
        <issuerName>HEIDRICK &amp; STRUGGLES INTERNATIONAL INC</issuerName>
        <issuerTradingSymbol>HSII</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001896402</rptOwnerCik>
            <rptOwnerName>Heaton Tracey</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O HEIDRICK &amp; STRUGGLES INT'L, INC.</rptOwnerStreet1>
            <rptOwnerStreet2>233 S. WACKER DR. SUITE 4900</rptOwnerStreet2>
            <rptOwnerCity>CHICAGO</rptOwnerCity>
            <rptOwnerState>IL</rptOwnerState>
            <rptOwnerZipCode>60606</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>Chief Legal Officer &amp; Corp Sec</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <aff10b5One>0</aff10b5One>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
                <footnoteId id="F1"/>
            </securityTitle>
            <transactionDate>
                <value>2025-03-09</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>8802</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                    <footnoteId id="F2"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>25886</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
                <footnoteId id="F3"/>
            </securityTitle>
            <transactionDate>
                <value>2025-06-22</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>F</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>956</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>43.21</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>24930</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes>
        <footnote id="F1">Reflects the vesting of 8,802 non-derivative Performance Stock Units (&quot;PSUs&quot;) granted on March 9, 2022 (&quot;2022 PSUs&quot;) for the three-year performance period ended December 31, 2024 and which are exempt from liability under Section 16(b) of the Securities Exchange Act pursuant to Rule 16b-3(d). PSUs are target-based equity grants that generally vest three years from the grant date if certain performance goals are achieved. The actual amounts to vest at the end of the performance period can range from 0% to 200% of target based on performance.</footnote>
        <footnote id="F2">PSUs convert into common stock on a one-for-one basis at the time of vesting.</footnote>
        <footnote id="F3">Reflects an aggregate of 956 shares of common stock retained by Issuer to satisfy tax withholding obligations with respect to 2023 RSUs that vested on June 22, 2025.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Antony Gabriel, Attorney-In-Fact</signatureName>
        <signatureDate>2025-06-23</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
