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

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2014-05-19</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000738214</issuerCik>
        <issuerName>AEMETIS, INC</issuerName>
        <issuerTradingSymbol>AMTX</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001055711</rptOwnerCik>
            <rptOwnerName>BLOCK JOHN R</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>20400 STEVENS CREEK BLVD.</rptOwnerStreet1>
            <rptOwnerStreet2>SUITE 700</rptOwnerStreet2>
            <rptOwnerCity>CUPERTINO</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>95014</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
                <footnoteId id="F1"/>
            </securityTitle>
            <transactionDate>
                <value>2014-05-19</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>X</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F2"/>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>14511</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>1.6</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>14511</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Non-qualified Stock Option</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>1.6</value>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2014-05-19</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>X</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F2"/>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>20000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>1.6</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <value>2009-05-21</value>
            </exerciseDate>
            <expirationDate>
                <value>2014-05-20</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>20000</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>0</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">The Issuer effected a 10-for-1 reverse stock split of its common stock effective on May 15, 2014. The number of shares, options, and price in this Form reflect post-reverse stock split figures.</footnote>
        <footnote id="F2">The reporting person effected a cashless exercise of  stock options surrendering 5,489 shares valued at $5.83 per share, and was issued a net of 14,511 shares of common stock.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ John Block by Todd Waltz, attorney-in-fact</signatureName>
        <signatureDate>2014-08-19</signatureDate>
    </ownerSignature>
</ownershipDocument>
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X0306
4
2014-05-19
0
0000738214
AEMETIS, INC
AMTX
0001055711
BLOCK JOHN R
20400 STEVENS CREEK BLVD.
SUITE 700
CUPERTINO
CA
95014
1
0
0
0
Common Stock
2014-05-19
4
X
0
14511
1.6
A
14511
D
Non-qualified Stock Option
1.6
2014-05-19
4
X
0
20000
1.6
D
2009-05-21
2014-05-20
Common Stock
20000
0
D
The Issuer effected a 10-for-1 reverse stock split of its common stock effective on May 15, 2014. The number of shares, options, and price in this Form reflect post-reverse stock split figures.
The reporting person effected a cashless exercise of  stock options surrendering 5,489 shares valued at $5.83 per share, and was issued a net of 14,511 shares of common stock.
/s/ John Block by Todd Waltz, attorney-in-fact
2014-08-19