<SEC-DOCUMENT>0001140361-18-011531.txt : 20180302
<SEC-HEADER>0001140361-18-011531.hdr.sgml : 20180302
<ACCEPTANCE-DATETIME>20180302131851
ACCESSION NUMBER:		0001140361-18-011531
CONFORMED SUBMISSION TYPE:	3
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20180223
FILED AS OF DATE:		20180302
DATE AS OF CHANGE:		20180302

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Mancini Remo
		CENTRAL INDEX KEY:			0001733104

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-33675
		FILM NUMBER:		18660932

	MAIL ADDRESS:	
		STREET 1:		6 LAIRD AVENUE SOUTH
		CITY:			AMHERSTBURG
		STATE:			A6
		ZIP:			N9V 1X5

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Riot Blockchain, Inc.
		CENTRAL INDEX KEY:			0001167419
		STANDARD INDUSTRIAL CLASSIFICATION:	IN VITRO & IN VIVO DIAGNOSTIC SUBSTANCES [2835]
		IRS NUMBER:				841553387
		STATE OF INCORPORATION:			NV
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		202 6TH STREET, SUITE 401
		CITY:			CASTLE ROCK
		STATE:			CO
		ZIP:			80104
		BUSINESS PHONE:		303-794-2000

	MAIL ADDRESS:	
		STREET 1:		202 6TH STREET, SUITE 401
		CITY:			CASTLE ROCK
		STATE:			CO
		ZIP:			80104

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	Bioptix, Inc.
		DATE OF NAME CHANGE:	20161201

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	Venaxis, Inc.
		DATE OF NAME CHANGE:	20121218

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	AspenBio Pharma, Inc.
		DATE OF NAME CHANGE:	20051110
</SEC-HEADER>
<DOCUMENT>
<TYPE>3
<SEQUENCE>1
<FILENAME>doc1.xml
<DESCRIPTION>FORM 3
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0206</schemaVersion>

    <documentType>3</documentType>

    <periodOfReport>2018-02-23</periodOfReport>

    <noSecuritiesOwned>0</noSecuritiesOwned>

    <issuer>
        <issuerCik>0001167419</issuerCik>
        <issuerName>Riot Blockchain, Inc.</issuerName>
        <issuerTradingSymbol>RIOT</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001733104</rptOwnerCik>
            <rptOwnerName>Mancini Remo</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>202 6TH STREET</rptOwnerStreet1>
            <rptOwnerStreet2>SUITE 401</rptOwnerStreet2>
            <rptOwnerCity>CASTLE ROCK</rptOwnerCity>
            <rptOwnerState>CO</rptOwnerState>
            <rptOwnerZipCode>80104</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle></officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>45000</value>
                    <footnoteId id="F1"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes>
        <footnote id="F1">On February 23, 2018, Riot Blockchain, Inc.'s (the &quot;Company&quot;) Board of Directors appointed Mr. Mancini to the Board of Directors of the Company. Mr. Mancini received an equity award for his appointment as independent director of 45,000 restricted stock units which shall vest 50% on the date of grant and 50% after six months along with cash compensation of $5,000 per month.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ Remo Mancini</signatureName>
        <signatureDate>2018-03-02</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
