    <SEC-DOCUMENT>0000950170-25-043826-index.html : 20250324
    <SEC-HEADER>0000950170-25-043826.hdr.sgml : 20250324
    <ACCEPTANCE-DATETIME>20250324160705
    ACCESSION NUMBER:		0000950170-25-043826
    CONFORMED SUBMISSION TYPE:	ARS
    PUBLIC DOCUMENT COUNT:		1
    CONFORMED PERIOD OF REPORT:	20241231
    FILED AS OF DATE:		20250324
    DATE AS OF CHANGE:		20250324
    EFFECTIVENESS DATE:		20250324

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			Montrose Environmental Group, Inc.
    		CENTRAL INDEX KEY:			0001643615
    		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-MANAGEMENT CONSULTING SERVICES [8742]
    		ORGANIZATION NAME:           	07 Trade & Services
    		EIN:				464195044
    		STATE OF INCORPORATION:			DE
    		FISCAL YEAR END:			1231

    	FILING VALUES:
    		FORM TYPE:		ARS
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	001-39394
    		FILM NUMBER:		25764212

    	BUSINESS ADDRESS:
    		STREET 1:		4 PARK PLAZA, SUITE 790
    		CITY:			IRVINE
    		STATE:			CA
    		ZIP:			92614
    		BUSINESS PHONE:		(949) 988-3500

    	MAIL ADDRESS:
    		STREET 1:		4 PARK PLAZA, SUITE 790
    		CITY:			IRVINE
    		STATE:			CA
    		ZIP:			92614
    </SEC-HEADER>
    <DOCUMENT>
    <TYPE>ARS
    <SEQUENCE>1
    <FILENAME>2025_ars_final.pdf
    <DESCRIPTION>ARS
    <TEXT>
    Document 1 - file: 2025_ars_final.pdf

    </DOCUMENT>
    </SEC-DOCUMENT>