<SEC-DOCUMENT>0001250853-19-000090.txt : 20190722
<SEC-HEADER>0001250853-19-000090.hdr.sgml : 20190722
<ACCEPTANCE-DATETIME>20190722201212
ACCESSION NUMBER:		0001250853-19-000090
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20190718
FILED AS OF DATE:		20190722
DATE AS OF CHANGE:		20190722

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Rice John Reynolds
		CENTRAL INDEX KEY:			0001698204

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-38015
		FILM NUMBER:		19966642

	MAIL ADDRESS:	
		STREET 1:		3900 PASEO DEL SOL
		CITY:			SANTA FE
		STATE:			NM
		ZIP:			87507

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			SIGMA LABS, INC.
		CENTRAL INDEX KEY:			0000788611
		STANDARD INDUSTRIAL CLASSIFICATION:	MISCELLANEOUS MANUFACTURING INDUSTRIES [3990]
		IRS NUMBER:				820404220
		STATE OF INCORPORATION:			NV
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		3900 PASEO DEL SOL
		CITY:			SANTE FE
		STATE:			NM
		ZIP:			87507
		BUSINESS PHONE:		(505) 438-2576

	MAIL ADDRESS:	
		STREET 1:		3900 PASEO DEL SOL
		CITY:			SANTE FE
		STATE:			NM
		ZIP:			87507

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	FRAMEWAVES INC
		DATE OF NAME CHANGE:	20010130

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	MESSIDOR LTD
		DATE OF NAME CHANGE:	20010122
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>primary_doc.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2019-07-18</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000788611</issuerCik>
        <issuerName>SIGMA LABS, INC.</issuerName>
        <issuerTradingSymbol>SGLB</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001698204</rptOwnerCik>
            <rptOwnerName>Rice John Reynolds</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>3900 PASEO DEL SOL</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>SANTA FE</rptOwnerCity>
            <rptOwnerState>NM</rptOwnerState>
            <rptOwnerZipCode>87507</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>President and CEO</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Stock Option (right to buy)</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>1.4</value>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2019-07-18</value>
                <footnoteId id="F1"/>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>22916</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <value>2019-07-18</value>
            </exerciseDate>
            <expirationDate>
                <value>2024-06-30</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>22916</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>22916</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">The option grant was previously approved by a committee of the Issuer's Board of Directors, subject to stockholder approval of an amendment to the Issuer's equity incentive plan under which the option was granted. The Issuer's stockholders approved the amendment on July 18, 2019.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ John Rice</signatureName>
        <signatureDate>2019-07-22</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
