<SEC-DOCUMENT>0000007789-25-000144.txt : 20250917
<SEC-HEADER>0000007789-25-000144.hdr.sgml : 20250917
<ACCEPTANCE-DATETIME>20250917150308
ACCESSION NUMBER:		0000007789-25-000144
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20250915
FILED AS OF DATE:		20250917
DATE AS OF CHANGE:		20250917

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Nettles Cory L
		CENTRAL INDEX KEY:			0001323628
		ORGANIZATION NAME:           	

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-31343
		FILM NUMBER:		251319742

	MAIL ADDRESS:	
		STREET 1:		WEYCO GROUP, INC.
		STREET 2:		333 W. ESTABROOK BOULEVARD
		CITY:			GLENDALE
		STATE:			WI
		ZIP:			53212

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			ASSOCIATED BANC-CORP
		CENTRAL INDEX KEY:			0000007789
		STANDARD INDUSTRIAL CLASSIFICATION:	STATE COMMERCIAL BANKS [6022]
		ORGANIZATION NAME:           	02 Finance
		EIN:				391098068
		STATE OF INCORPORATION:			WI
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		433 MAIN STREET
		CITY:			GREEN BAY
		STATE:			WI
		ZIP:			54301
		BUSINESS PHONE:		920-491-7500

	MAIL ADDRESS:	
		STREET 1:		433 MAIN STREET
		CITY:			GREEN BAY
		STATE:			WI
		ZIP:			54301

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	ASSOCIATED BANK SERVICES INC
		DATE OF NAME CHANGE:	19770626
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>form4.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0508</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2025-09-15</periodOfReport>

    <issuer>
        <issuerCik>0000007789</issuerCik>
        <issuerName>ASSOCIATED BANC-CORP</issuerName>
        <issuerTradingSymbol>ASB</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001323628</rptOwnerCik>
            <rptOwnerName>Nettles Cory L</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>ASSOCIATED BANC-CORP</rptOwnerStreet1>
            <rptOwnerStreet2>433 MAIN STREET</rptOwnerStreet2>
            <rptOwnerCity>GREEN BAY</rptOwnerCity>
            <rptOwnerState>WI</rptOwnerState>
            <rptOwnerZipCode>54301</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
        </reportingOwnerRelationship>
    </reportingOwner>

    <aff10b5One>0</aff10b5One>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock $0.01 Par Value</value>
            </securityTitle>
            <transactionDate>
                <value>2025-09-15</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
            </transactionCoding>
            <transactionTimeliness></transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>45</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>25.92</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>46236</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock $0.01 Par Value</value>
            </securityTitle>
            <transactionDate>
                <value>2025-09-15</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F2"/>
            </transactionCoding>
            <transactionTimeliness></transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>361</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>25.92</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>46597</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Dividend equivalent units, which vest on the first anniversary of the grant of the restricted stock units to which they relate, are payable solely in shares of common stock upon vesting (subject to deferral if so elected by the Insider).</footnote>
        <footnote id="F2">Fully vested dividend equivalents received on restricted stock units payable solely in shares of common stock following the date the Insider ceases serving as a director.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ Lynn M. Floeter, attorney-in-fact for Cory L. Nettles</signatureName>
        <signatureDate>2025-09-17</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
