<SEC-DOCUMENT>0000899243-21-036237.txt : 20210916
<SEC-HEADER>0000899243-21-036237.hdr.sgml : 20210916
<ACCEPTANCE-DATETIME>20210916113056
ACCESSION NUMBER:		0000899243-21-036237
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20210914
FILED AS OF DATE:		20210916
DATE AS OF CHANGE:		20210916

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Savas Zachary E.
		CENTRAL INDEX KEY:			0001471478

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-38864
		FILM NUMBER:		211257271

	MAIL ADDRESS:	
		STREET 1:		3250 W. BIG BEAVER ROAD
		STREET 2:		SUITE 544
		CITY:			TROY
		STATE:			MI
		ZIP:			48084

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			ALTA EQUIPMENT GROUP INC.
		CENTRAL INDEX KEY:			0001759824
		STANDARD INDUSTRIAL CLASSIFICATION:	WHOLESALE-INDUSTRIAL MACHINERY & EQUIPMENT [5084]
		IRS NUMBER:				832583782
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		13211 MERRIMAN ROAD
		CITY:			LIVONIA
		STATE:			MI
		ZIP:			48150
		BUSINESS PHONE:		(248) 449-6700

	MAIL ADDRESS:	
		STREET 1:		13211 MERRIMAN ROAD
		CITY:			LIVONIA
		STATE:			MI
		ZIP:			48150

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	B. Riley Principal Merger Corp.
		DATE OF NAME CHANGE:	20181121
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>doc4.xml
<DESCRIPTION>FORM 4 SUBMISSION
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2021-09-14</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001759824</issuerCik>
        <issuerName>ALTA EQUIPMENT GROUP INC.</issuerName>
        <issuerTradingSymbol>ALTG</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001471478</rptOwnerCik>
            <rptOwnerName>Savas Zachary E.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O ALTA EQUIPMENT GROUP</rptOwnerStreet1>
            <rptOwnerStreet2>13211 MERRIMAN ROAD</rptOwnerStreet2>
            <rptOwnerCity>LIVONIA</rptOwnerCity>
            <rptOwnerState>MI</rptOwnerState>
            <rptOwnerZipCode>48150</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>
            </securityTitle>
            <transactionDate>
                <value>2021-09-14</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>P</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>5000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>12.90</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>38781</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">5,000 shares were acquired in open market transaction on September 14, 2021 at a purchase price of $12.90/share.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Zachary Savas</signatureName>
        <signatureDate>2021-09-16</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
