    <SEC-DOCUMENT>0001140361-24-026023-index.html : 20240514
    <SEC-HEADER>0001140361-24-026023.hdr.sgml : 20240514
    <ACCEPTANCE-DATETIME>20240514171850
    ACCESSION NUMBER:		0001140361-24-026023
    CONFORMED SUBMISSION TYPE:	PRE 14A
    PUBLIC DOCUMENT COUNT:		11
    CONFORMED PERIOD OF REPORT:	20240625
    FILED AS OF DATE:		20240514
    DATE AS OF CHANGE:		20240514

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			Momentus Inc.
    		CENTRAL INDEX KEY:			0001781162
    		STANDARD INDUSTRIAL CLASSIFICATION:	GUIDED MISSILES & SPACE VEHICLES & PARTS [3760]
    		ORGANIZATION NAME:           	04 Manufacturing
    		IRS NUMBER:				841905538
    		STATE OF INCORPORATION:			DE
    		FISCAL YEAR END:			1231

    	FILING VALUES:
    		FORM TYPE:		PRE 14A
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	001-39128
    		FILM NUMBER:		24945781

    	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>PRE 14A
    <SEQUENCE>1
    <FILENAME>ny20027320x1_pre14a.htm
    <DESCRIPTION>PRE 14A
    <TEXT>
    Document 1 - file: ny20027320x1_pre14a.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>2
    <FILENAME>logo_momentus.jpg
    <TEXT>
    Document 2 - file: logo_momentus.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>3
    <FILENAME>logo_momentusx1.jpg
    <TEXT>
    Document 3 - file: logo_momentusx1.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>4
    <FILENAME>ny20027320x1_date.jpg
    <TEXT>
    Document 4 - file: ny20027320x1_date.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>5
    <FILENAME>ny20027320x1_pc01.jpg
    <TEXT>
    Document 5 - file: ny20027320x1_pc01.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>6
    <FILENAME>ny20027320x1_pc02.jpg
    <TEXT>
    Document 6 - file: ny20027320x1_pc02.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>7
    <FILENAME>ny20027320x1_votemail.jpg
    <TEXT>
    Document 7 - file: ny20027320x1_votemail.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>8
    <FILENAME>ny20027320x1_votemeeting.jpg
    <TEXT>
    Document 8 - file: ny20027320x1_votemeeting.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>9
    <FILENAME>ny20027320x1_voteonline.jpg
    <TEXT>
    Document 9 - file: ny20027320x1_voteonline.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>10
    <FILENAME>ny20027320x1_votephone.jpg
    <TEXT>
    Document 10 - file: ny20027320x1_votephone.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>11
    <FILENAME>ny20027320x1_where.jpg
    <TEXT>
    Document 11 - file: ny20027320x1_where.jpg

    </DOCUMENT>
    </SEC-DOCUMENT>