    <SEC-DOCUMENT>0001441816-21-000088-index.html : 20210517
    <SEC-HEADER>0001441816-21-000088.hdr.sgml : 20210517
    <ACCEPTANCE-DATETIME>20210517162118
    ACCESSION NUMBER:		0001441816-21-000088
    CONFORMED SUBMISSION TYPE:	DEFA14A
    PUBLIC DOCUMENT COUNT:		3
    FILED AS OF DATE:		20210517
    DATE AS OF CHANGE:		20210517

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			MongoDB, Inc.
    		CENTRAL INDEX KEY:			0001441816
    		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-PREPACKAGED SOFTWARE [7372]
    		IRS NUMBER:				000000000
    		STATE OF INCORPORATION:			DE
    		FISCAL YEAR END:			0131

    	FILING VALUES:
    		FORM TYPE:		DEFA14A
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	001-38240
    		FILM NUMBER:		21931031

    	BUSINESS ADDRESS:
    		STREET 1:		1633 BROADWAY
    		STREET 2:		38TH FLOOR
    		CITY:			NEW YORK
    		STATE:			NY
    		ZIP:			10019
    		BUSINESS PHONE:		866-237-8815

    	MAIL ADDRESS:
    		STREET 1:		1633 BROADWAY
    		STREET 2:		38TH FLOOR
    		CITY:			NEW YORK
    		STATE:			NY
    		ZIP:			10019

    	FORMER COMPANY:
    		FORMER CONFORMED NAME:	10GEN INC
    		DATE OF NAME CHANGE:	20080801
    </SEC-HEADER>
    <DOCUMENT>
    <TYPE>DEFA14A
    <SEQUENCE>1
    <FILENAME>mdbdefa14a2021notice.htm
    <DESCRIPTION>DEFA14A
    <TEXT>
    Document 1 - file: mdbdefa14a2021notice.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>2
    <FILENAME>mdbnotice20211.jpg
    <TEXT>
    Document 2 - file: mdbnotice20211.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>3
    <FILENAME>mdbnotice20212.jpg
    <TEXT>
    Document 3 - file: mdbnotice20212.jpg

    </DOCUMENT>
    </SEC-DOCUMENT>