<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0407</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2023-05-26</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000727273</issuerCik>
        <issuerName>CADIZ INC</issuerName>
        <issuerTradingSymbol>CDZI</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001854939</rptOwnerCik>
            <rptOwnerName>Kennedy Susan P</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>550 SOUTH HOPE STREET</rptOwnerStreet1>
            <rptOwnerStreet2>SUITE 2850</rptOwnerStreet2>
            <rptOwnerCity>LOS ANGELES</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>90071</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <aff10b5One>0</aff10b5One>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2023-05-26</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>P</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>1970</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>5.06</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>68432</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable>
        <derivativeHolding>
            <securityTitle>
                <value>Performance Rights</value>
                <footnoteId id="F1"/>
            </securityTitle>
            <conversionOrExercisePrice>
                <footnoteId id="F2"/>
            </conversionOrExercisePrice>
            <exerciseDate>
                <footnoteId id="F2"/>
            </exerciseDate>
            <expirationDate>
                <value>2027-02-04</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>450000</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>450000</value>
                    <footnoteId id="F3"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeHolding>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">Previously reported.</footnote>
        <footnote id="F2">Each performance right represents a contingent right to receive one share of the Issuer's common stock. 200,000 of the performance rights vest upon the Issuer's common stock achieving a market price of $7 per share; 150,000 vest upon the Issuer's common stock achieving a market price of $9 per share; 50,000 vest upon the Issuer's common stock achieving a market price of $11 per share, and 50,000 vest upon the Issuer's common stock achieving a market price of $13 per share. Performance rights are payable in the form of either cash or common stock registered under a stockholder approved equity incentive plan under which a sufficient number of shares of common stock then remains available for issuance.</footnote>
        <footnote id="F3">The Reporting Person disclaims beneficial ownership of these securities until such time, and to the extent, that ownership of these securities has vested.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>Susan P. Kennedy</signatureName>
        <signatureDate>2023-05-26</signatureDate>
    </ownerSignature>
</ownershipDocument>
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X0407
4
2023-05-26
0
0000727273
CADIZ INC
CDZI
0001854939
Kennedy Susan P
550 SOUTH HOPE STREET
SUITE 2850
LOS ANGELES
CA
90071
1
0
0
0
0
Common Stock
2023-05-26
4
P
0
1970
5.06
A
68432
D
Performance Rights
2027-02-04
Common Stock
450000
450000
D
Previously reported.
Each performance right represents a contingent right to receive one share of the Issuer's common stock. 200,000 of the performance rights vest upon the Issuer's common stock achieving a market price of $7 per share; 150,000 vest upon the Issuer's common stock achieving a market price of $9 per share; 50,000 vest upon the Issuer's common stock achieving a market price of $11 per share, and 50,000 vest upon the Issuer's common stock achieving a market price of $13 per share. Performance rights are payable in the form of either cash or common stock registered under a stockholder approved equity incentive plan under which a sufficient number of shares of common stock then remains available for issuance.
The Reporting Person disclaims beneficial ownership of these securities until such time, and to the extent, that ownership of these securities has vested.
Susan P. Kennedy
2023-05-26