    <SEC-DOCUMENT>0001140361-25-046747-index.html : 20251230
    <SEC-HEADER>0001140361-25-046747.hdr.sgml : 20251230
    <ACCEPTANCE-DATETIME>20251230095524
    ACCESSION NUMBER:		0001140361-25-046747
    CONFORMED SUBMISSION TYPE:	DEF 14A
    PUBLIC DOCUMENT COUNT:		11
    CONFORMED PERIOD OF REPORT:	20260127
    FILED AS OF DATE:		20251229
    DATE AS OF CHANGE:		20251230

    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
    		EIN:				841905538
    		STATE OF INCORPORATION:			DE
    		FISCAL YEAR END:			1231

    	FILING VALUES:
    		FORM TYPE:		DEF 14A
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	001-39128
    		FILM NUMBER:		251611549

    	BUSINESS ADDRESS:
    		STREET 1:		3901 N. FIRST STREET
    		CITY:			SAN JOSE
    		STATE:			CA
    		ZIP:			95134
    		BUSINESS PHONE:		6505647820

    	MAIL ADDRESS:
    		STREET 1:		3901 N. FIRST STREET
    		CITY:			SAN JOSE
    		STATE:			CA
    		ZIP:			95134

    	FORMER COMPANY:
    		FORMER CONFORMED NAME:	Stable Road Acquisition Corp.
    		DATE OF NAME CHANGE:	20190628
    </SEC-HEADER>
    <DOCUMENT>
    <TYPE>DEF 14A
    <SEQUENCE>1
    <FILENAME>ny20060904x2_def14a.htm
    <DESCRIPTION>DEF 14A
    <TEXT>
    Document 1 - file: ny20060904x2_def14a.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>2
    <FILENAME>logo_momentus3.jpg
    <TEXT>
    Document 2 - file: logo_momentus3.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>3
    <FILENAME>logo_momentus3x1.jpg
    <TEXT>
    Document 3 - file: logo_momentus3x1.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>4
    <FILENAME>ny20060904x2_date.jpg
    <TEXT>
    Document 4 - file: ny20060904x2_date.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>5
    <FILENAME>ny20060904x2_pc01.jpg
    <TEXT>
    Document 5 - file: ny20060904x2_pc01.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>6
    <FILENAME>ny20060904x2_pc02.jpg
    <TEXT>
    Document 6 - file: ny20060904x2_pc02.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>7
    <FILENAME>ny20060904x2_votemail.jpg
    <TEXT>
    Document 7 - file: ny20060904x2_votemail.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>8
    <FILENAME>ny20060904x2_votemeeting.jpg
    <TEXT>
    Document 8 - file: ny20060904x2_votemeeting.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>9
    <FILENAME>ny20060904x2_voteonline.jpg
    <TEXT>
    Document 9 - file: ny20060904x2_voteonline.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>10
    <FILENAME>ny20060904x2_votephone.jpg
    <TEXT>
    Document 10 - file: ny20060904x2_votephone.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>11
    <FILENAME>ny20060904x2_where.jpg
    <TEXT>
    Document 11 - file: ny20060904x2_where.jpg

    </DOCUMENT>
    </SEC-DOCUMENT>