-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
 MFgwCgYEVQgBAQICAf8DSgAwRwJAW2sNKK9AVtBzYZmr6aGjlWyK3XmZv3dTINen
 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 QmHsnalniYDuNHyid9sE237WiIV5LxgNfIrw2oFjK/YzvnJOrddbH6S7U9WJJk21
 zU76pgpjeCqiG1FCfiCMTw==

<SEC-DOCUMENT>0001460047-10-000002.txt : 20100312
<SEC-HEADER>0001460047-10-000002.hdr.sgml : 20100312
<ACCEPTANCE-DATETIME>20100312123328
ACCESSION NUMBER:		0001460047-10-000002
CONFORMED SUBMISSION TYPE:	D/A
PUBLIC DOCUMENT COUNT:		1
ITEM INFORMATION:		Rule 506
FILED AS OF DATE:		20100312
DATE AS OF CHANGE:		20100312
EFFECTIVENESS DATE:		20100312

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			LIQUID ASSETS PORTFOLIO, a series of Northern Institutional Funds
		CENTRAL INDEX KEY:			0001460047
		IRS NUMBER:				000000000
		STATE OF INCORPORATION:			DE

	FILING VALUES:
		FORM TYPE:		D/A
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	021-128998
		FILM NUMBER:		10676664

	BUSINESS ADDRESS:	
		STREET 1:		50 SOUTH LASALLE STREET
		CITY:			CHICAGO
		STATE:			IL
		ZIP:			60603
		BUSINESS PHONE:		312-557-7547

	MAIL ADDRESS:	
		STREET 1:		50 SOUTH LASALLE STREET
		CITY:			CHICAGO
		STATE:			IL
		ZIP:			60603
</SEC-HEADER>
<DOCUMENT>
<TYPE>D/A
<SEQUENCE>1
<FILENAME>primary_doc.xml
<TEXT>
<XML>
<?xml version="1.0"?>
<edgarSubmission>

    <schemaVersion>X0603</schemaVersion>

    <submissionType>D/A</submissionType>

    <testOrLive>LIVE</testOrLive>

    <primaryIssuer>
        <cik>0001460047</cik>
        <entityName>LIQUID ASSETS PORTFOLIO, a series of Northern Institutional Funds</entityName>
        <issuerAddress>
            <street1>50 SOUTH LASALLE STREET</street1>
            <city>CHICAGO</city>
            <stateOrCountry>IL</stateOrCountry>
            <zipCode>60603</zipCode>
        </issuerAddress>
        <issuerPhoneNumber>312-557-7547</issuerPhoneNumber>
        <jurisdictionOfInc>DELAWARE</jurisdictionOfInc>
        <issuerPreviousNameList>
            <value>None</value>
        </issuerPreviousNameList>
        <edgarPreviousNameList>
            <value>None</value>
        </edgarPreviousNameList>
        <entityType>Business Trust</entityType>
        <yearOfInc>
            <overFiveYears>true</overFiveYears>
        </yearOfInc>
    </primaryIssuer>

    <relatedPersonsList>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>William</firstName>
                <middleName>L.</middleName>
                <lastName>Bax</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>50 S. LaSalle Street</street1>
                <city>Chicago</city>
                <stateOrCountry>IL</stateOrCountry>
                <zipCode>60603</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Edward</firstName>
                <middleName>J.</middleName>
                <lastName>Condon, Jr.</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>50 S. LaSalle Street</street1>
                <city>Chicago</city>
                <stateOrCountry>IL</stateOrCountry>
                <zipCode>60603</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Sharon</firstName>
                <middleName>Gist</middleName>
                <lastName>Gilliam</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>50 S. LaSalle Street</street1>
                <city>Chicago</city>
                <stateOrCountry>IL</stateOrCountry>
                <zipCode>60603</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Sandra</firstName>
                <middleName>Polk</middleName>
                <lastName>Guthman</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>50 S. LaSalle Street</street1>
                <city>Chicago</city>
                <stateOrCountry>IL</stateOrCountry>
                <zipCode>60603</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Michael</firstName>
                <middleName>H.</middleName>
                <lastName>Moskow</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>50 S. LaSalle Street</street1>
                <city>Chicago</city>
                <stateOrCountry>IL</stateOrCountry>
                <zipCode>60603</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Richard</firstName>
                <middleName>P.</middleName>
                <lastName>Strubel</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>50 S. LaSalle Street</street1>
                <city>Chicago</city>
                <stateOrCountry>IL</stateOrCountry>
                <zipCode>60603</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Casey</firstName>
                <middleName>J.</middleName>
                <lastName>Sylla</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>50 S. LaSalle Street</street1>
                <city>Chicago</city>
                <stateOrCountry>IL</stateOrCountry>
                <zipCode>60603</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Stephen</firstName>
                <middleName>N.</middleName>
                <lastName>Potter</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>50 S. LaSalle Street</street1>
                <city>Chicago</city>
                <stateOrCountry>IL</stateOrCountry>
                <zipCode>60603</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Mary</firstName>
                <middleName>Jacobs</middleName>
                <lastName>Skinner</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>50 S. LaSalle Street</street1>
                <city>Chicago</city>
                <stateOrCountry>IL</stateOrCountry>
                <zipCode>60603</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Lloyd</firstName>
                <middleName>A.</middleName>
                <lastName>Wennlund</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>50 S. LaSalle Street</street1>
                <city>Chicago</city>
                <stateOrCountry>IL</stateOrCountry>
                <zipCode>60603</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Randal</firstName>
                <lastName>Rein</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>50 S. LaSalle Street</street1>
                <city>Chicago</city>
                <stateOrCountry>IL</stateOrCountry>
                <zipCode>60603</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
    </relatedPersonsList>

    <offeringData>
        <industryGroup>
            <industryGroupType>Pooled Investment Fund</industryGroupType>
            <investmentFundInfo>
                <investmentFundType>Other Investment Fund</investmentFundType>
                <is40Act>true</is40Act>
            </investmentFundInfo>
        </industryGroup>
        <issuerSize>
            <aggregateNetAssetValueRange>Decline to Disclose</aggregateNetAssetValueRange>
        </issuerSize>
        <federalExemptionsExclusions>
            <item>06</item>
        </federalExemptionsExclusions>
        <typeOfFiling>
            <newOrAmendment>
                <isAmendment>true</isAmendment>
                <previousAccessionNumber>9999999997-09-012950</previousAccessionNumber>
            </newOrAmendment>
            <dateOfFirstSale>
                <value>2001-08-15</value>
            </dateOfFirstSale>
        </typeOfFiling>
        <durationOfOffering>
            <moreThanOneYear>true</moreThanOneYear>
        </durationOfOffering>
        <typesOfSecuritiesOffered>
            <isPooledInvestmentFundType>true</isPooledInvestmentFundType>
        </typesOfSecuritiesOffered>
        <businessCombinationTransaction>
            <isBusinessCombinationTransaction>false</isBusinessCombinationTransaction>
            <clarificationOfResponse></clarificationOfResponse>
        </businessCombinationTransaction>
        <minimumInvestmentAccepted>0</minimumInvestmentAccepted>
        <salesCompensationList></salesCompensationList>
        <offeringSalesAmounts>
            <totalOfferingAmount>Indefinite</totalOfferingAmount>
            <totalAmountSold>1413632000</totalAmountSold>
            <totalRemaining>Indefinite</totalRemaining>
            <clarificationOfResponse>Value of total shares outstanding as of November 30, 2009.</clarificationOfResponse>
        </offeringSalesAmounts>
        <investors>
            <hasNonAccreditedInvestors>false</hasNonAccreditedInvestors>
            <totalNumberAlreadyInvested>117</totalNumberAlreadyInvested>
        </investors>
        <salesCommissionsFindersFees>
            <salesCommissions>
                <dollarAmount>0</dollarAmount>
            </salesCommissions>
            <findersFees>
                <dollarAmount>0</dollarAmount>
            </findersFees>
            <clarificationOfResponse></clarificationOfResponse>
        </salesCommissionsFindersFees>
        <useOfProceeds>
            <grossProceedsUsed>
                <dollarAmount>0</dollarAmount>
            </grossProceedsUsed>
            <clarificationOfResponse></clarificationOfResponse>
        </useOfProceeds>
        <signatureBlock>
            <authorizedRepresentative>false</authorizedRepresentative>
            <signature>
                <issuerName>LIQUID ASSETS PORTFOLIO, a series of Northern Institutional Funds</issuerName>
                <signatureName>Lloyd Wennlund</signatureName>
                <nameOfSigner>Lloyd Wennlund</nameOfSigner>
                <signatureTitle>President of issuer</signatureTitle>
                <signatureDate>2010-03-12</signatureDate>
            </signature>
        </signatureBlock>
    </offeringData>
</edgarSubmission>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
-----END PRIVACY-ENHANCED MESSAGE-----