Washington, D.C. 20549


Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940
OMB Number: 3235-0104
Estimated average burden
hours per response: 0.5
1. Name and Address of Reporting Person*
Pech Cedric

(Last) (First) (Middle)


(City) (State) (Zip)
2. Date of Event Requiring Statement (Month/Day/Year)
3. Issuer Name and Ticker or Trading Symbol
MongoDB, Inc. [ MDB ]
4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
Director 10% Owner
X Officer (give title below) Other (specify below)
Chief Revenue Officer
5. If Amendment, Date of Original Filed (Month/Day/Year)
6. Individual or Joint/Group Filing (Check Applicable Line)
X Form filed by One Reporting Person
Form filed by More than One Reporting Person
Table I - Non-Derivative Securities Beneficially Owned
1. Title of Security (Instr. 4) 2. Amount of Securities Beneficially Owned (Instr. 4) 3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5) 4. Nature of Indirect Beneficial Ownership (Instr. 5)
Class A Common Stock 32,272(1) D
Table II - Derivative Securities Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4) 2. Date Exercisable and Expiration Date (Month/Day/Year) 3. Title and Amount of Securities Underlying Derivative Security (Instr. 4) 4. Conversion or Exercise Price of Derivative Security 5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5) 6. Nature of Indirect Beneficial Ownership (Instr. 5)
Date Exercisable Expiration Date Title Amount or Number of Shares
Employee Stock Option (Right to Buy) (2) 04/05/2027 Class A Common Stock 171,875 8.4 D
Explanation of Responses:
1. Includes 31,691 restricted stock units. Each restricted stock unit represents a contingent right to receive one share of Class A Common Stock of the Issuer. Each restricted stock unit award shall vest in equal quarterly installments, subject to the reporting person's continued service with the Issuer.
2. All shares underlying this option are immediately exercisable, subject to a repurchase right in the Issuer's favor which lapses in accordance with the option's vesting schedule. 5,729 shares are vested. The remaining shares shall vest in 29 equal monthly installments beginning on March 1, 2019, subject to the reporting person providing continuous service to the Issuer on each such date.
/s/ Sarah Ward, Attorney-in-Fact 02/11/2019
** Signature of Reporting Person Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 5 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

(For Executing Form ID and Forms 3, 4 and 5)

Know all by these presents, that the undersigned hereby constitutes and
appoints each of Andrew Stephens and Sarah Ward of MongoDB, Inc. (the "Company")
and Nicole Brookshire and Alison Haggerty of Cooley LLP with full power of 
substitution, signing individually, the undersigned's true and lawful attorneys
-in fact and agents to:

    (1)    Prepare, execute in the undersigned's name and on the 
undersigned's behalf, and submit to the Securities and Exchange Commission (the
 "SEC") Form ID and Forms 3, 4 and 5 (including amendments thereto and joint 
filing agreements in connection therewith) in accordance with Section 16(a) of 
the Securities Exchange Act of 1934, as amended (the "Exchange Act") and the 
rules thereunder in the undersigned's capacity as an officer, director or 
beneficial owner of more than 10% of a registered class of securities of the 

    (2)    Do and perform any and all acts for and on behalf of the 
undersigned that may be necessary or desirable to prepare and execute any such 
Form ID and Forms 3, 4 or 5 (including amendments thereto and joint filing 
agreements in connection therewith) and timely file such forms with the SEC and 
any stock exchange, self-regulatory
 association or any similar authority; and

    (3)    Take any other action of any type whatsoever in connection with 
the foregoing that, in the opinion of such attorney-in-fact, may be of benefit 
to, in the best interest of, or legally required of the undersigned, it being 
understood that the documents executed by the attorney-in-fact on behalf of the 
undersigned pursuant to this Power of Attorney shall be in such form and shall 
contain such terms and conditions as the attorney-in-fact may approve in the 
attorney-in-fact's discretion.

    The undersigned hereby grants to each such attorney in fact full power 
and authority to do and perform any and every act and thing whatsoever 
requisite, necessary, or proper to be done in the exercise of any of the rights 
and powers herein granted, as fully to all intents and purposes as the 
undersigned might or could do if personally present, with full power of 
substitution or revocation, hereby ratifying and confirming all that such 
attorney in fact, or such attorney in fact's substitute or substitutes, shall 
lawfully do or cause to be done by virtue of this power of attorney and the 
rights and powers herein granted.  The undersigned acknowledges that the 
foregoing attorneys-in-fact, and their substitutes, in serving in such capacity 
at the request of the undersigned, are not assuming (nor is the Company 
assuming) any of the undersigned's responsibilities to comply with Section 16 
of the Exchange Act.

    This Power of Attorney shall remain in full force and effect until the 
earliest to occur of (a) the undersigned is no longer required to file Forms 3, 
4 and 5 with respect to the undersigned's holdings of and transactions in 
securities issued by the Company, (b) revocation by the undersigned in a signed 
writing delivered to the Company and the foregoing attorneys-in fact or (c) as 
to any attorney-in-fact individually, until such attorney-in-fact is no longer 
employed by the Company, or any of its subsidiaries, or Cooley LLP, as 

    IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney 
to be executed as of the date written below.

Date: February 4, 2019

By: /s/Cedric Pech
Cedric Pech