<SEC-DOCUMENT>0001781162-21-000047.txt : 20211126
<SEC-HEADER>0001781162-21-000047.hdr.sgml : 20211126
<ACCEPTANCE-DATETIME>20211126113039
ACCESSION NUMBER:		0001781162-21-000047
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20211123
FILED AS OF DATE:		20211126
DATE AS OF CHANGE:		20211126

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Rood John C.
		CENTRAL INDEX KEY:			0001873855

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-39128
		FILM NUMBER:		211450359

	MAIL ADDRESS:	
		STREET 1:		C/O MOMENTUS INC.
		STREET 2:		3050 KENNETH ST.
		CITY:			SANTA CLARA
		STATE:			CA
		ZIP:			95054

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Momentus Inc.
		CENTRAL INDEX KEY:			0001781162
		STANDARD INDUSTRIAL CLASSIFICATION:	GUIDED MISSILES & SPACE VEHICLES & PARTS [3760]
		IRS NUMBER:				841905538
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		1345 ABBOT KINNEY BLVD.
		CITY:			VENICE BEACH
		STATE:			CA
		ZIP:			90291
		BUSINESS PHONE:		2137936507

	MAIL ADDRESS:	
		STREET 1:		1345 ABBOT KINNEY BLVD.
		CITY:			VENICE BEACH
		STATE:			CA
		ZIP:			90291

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	Stable Road Acquisition Corp.
		DATE OF NAME CHANGE:	20190628
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>wf-form4_163794422396656.xml
<DESCRIPTION>FORM 4
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2021-11-23</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001781162</issuerCik>
        <issuerName>Momentus Inc.</issuerName>
        <issuerTradingSymbol>MNTS</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001873855</rptOwnerCik>
            <rptOwnerName>Rood John C.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O MOMENTUS INC.</rptOwnerStreet1>
            <rptOwnerStreet2>3901 N. FIRST STREET</rptOwnerStreet2>
            <rptOwnerCity>SAN JOSE</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>95134</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>Chief Executive Officer</officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Class A Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2021-11-23</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>28041</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>7.5824</value>
                    <footnoteId id="F2"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>29245</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes>
        <footnote id="F1">Shares of Class A Common Stock were sold in the open market solely to satisfy tax obligations of the Reporting Person in connection with the vesting of the restricted stock units.</footnote>
        <footnote id="F2">This transaction was executed in multiple trades at prices ranging from $7.56 to $7.91. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Jikun Kim, Attorney-in-Fact</signatureName>
        <signatureDate>2021-11-26</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
