<SEC-DOCUMENT>0001209191-21-051730.txt : 20210816
<SEC-HEADER>0001209191-21-051730.hdr.sgml : 20210816
<ACCEPTANCE-DATETIME>20210816210733
ACCESSION NUMBER:		0001209191-21-051730
CONFORMED SUBMISSION TYPE:	3
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20210812
FILED AS OF DATE:		20210816
DATE AS OF CHANGE:		20210816

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Prime Movers Lab Fund I LP
		CENTRAL INDEX KEY:			0001751631
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-39128
		FILM NUMBER:		211180688

	BUSINESS ADDRESS:	
		STREET 1:		PO BOX 12829
		CITY:			JACKSON
		STATE:			WY
		ZIP:			83002
		BUSINESS PHONE:		3072035036

	MAIL ADDRESS:	
		STREET 1:		PO BOX 12829
		CITY:			JACKSON
		STATE:			WY
		ZIP:			83002

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Momentus PML SPV 1 LP
		CENTRAL INDEX KEY:			0001780632
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-39128
		FILM NUMBER:		211180687

	BUSINESS ADDRESS:	
		STREET 1:		PO BOX 12829
		CITY:			JACKSON
		STATE:			WY
		ZIP:			83002
		BUSINESS PHONE:		307-203-5036

	MAIL ADDRESS:	
		STREET 1:		PO BOX 12829
		CITY:			JACKSON
		STATE:			WY
		ZIP:			83002

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Momentus PML SPV 3 LP
		CENTRAL INDEX KEY:			0001853076
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-39128
		FILM NUMBER:		211180685

	BUSINESS ADDRESS:	
		STREET 1:		6765 CRYSTAL SPRINGS RD
		CITY:			TETON VILLAGE
		STATE:			WY
		ZIP:			83025
		BUSINESS PHONE:		307-203-5036

	MAIL ADDRESS:	
		STREET 1:		6765 CRYSTAL SPRINGS RD
		CITY:			TETON VILLAGE
		STATE:			WY
		ZIP:			83025

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			MOMENTUS PML SPV 2 LP
		CENTRAL INDEX KEY:			0001819327
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-39128
		FILM NUMBER:		211180686

	BUSINESS ADDRESS:	
		STREET 1:		6765 CRYSTAL SPRINGS RD
		CITY:			TETON COUNTY
		STATE:			WY
		ZIP:			83025
		BUSINESS PHONE:		307-203-5036

	MAIL ADDRESS:	
		STREET 1:		6765 CRYSTAL SPRINGS RD
		CITY:			TETON COUNTY
		STATE:			WY
		ZIP:			83025

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>3
<SEQUENCE>1
<FILENAME>doc3.xml
<DESCRIPTION>FORM 3 SUBMISSION
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0206</schemaVersion>

    <documentType>3</documentType>

    <periodOfReport>2021-08-12</periodOfReport>

    <noSecuritiesOwned>1</noSecuritiesOwned>

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

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001751631</rptOwnerCik>
            <rptOwnerName>Prime Movers Lab Fund I LP</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>P.O. BOX 12829</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>JACKSON</rptOwnerCity>
            <rptOwnerState>WY</rptOwnerState>
            <rptOwnerZipCode>83002</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001780632</rptOwnerCik>
            <rptOwnerName>Momentus PML SPV 1 LP</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>P.O. BOX 12829</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>JACKSON</rptOwnerCity>
            <rptOwnerState>WY</rptOwnerState>
            <rptOwnerZipCode>83002</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001819327</rptOwnerCik>
            <rptOwnerName>MOMENTUS PML SPV 2 LP</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>P.O. BOX 12829</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>JACKSON</rptOwnerCity>
            <rptOwnerState>WY</rptOwnerState>
            <rptOwnerZipCode>83002</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001853076</rptOwnerCik>
            <rptOwnerName>Momentus PML SPV 3 LP</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>P.O. BOX 12829</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>JACKSON</rptOwnerCity>
            <rptOwnerState>WY</rptOwnerState>
            <rptOwnerZipCode>83002</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <footnotes></footnotes>

    <remarks>No securities are beneficially owned.</remarks>

    <ownerSignature>
        <signatureName>/s/ Jon Layman, Authorized Person on behalf of the General Partner of each Reporting Person</signatureName>
        <signatureDate>2021-08-16</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
