FORM 4 [ ] Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).         
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES
                                                                                  
OMB APPROVAL
OMB Number: 3235-0287
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Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940
                      
1. Name and Address of Reporting Person * Horowitz Eliot 2. Issuer Name and Ticker or Trading Symbol MongoDB, Inc. [ MDB ] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable)__X__ Director                    _____ 10% Owner
__X__ Officer (give title below)    _____ Other (specify below)
Chief Technology Officer
(Last)         (First)         (Middle)
C/O MONGODB, INC., 1633 BROADWAY, 38TH FLOOR
3. Date of Earliest Transaction (MM/DD/YYYY)
7/1/2020
(Street)
NEW YORK, NY 10019
(City)       (State)       (Zip)
4. If Amendment, Date Original Filed (MM/DD/YYYY)
 
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 Acquired, Disposed of, or Beneficially Owned
1.Title of Security
(Instr. 3)
2. Trans. Date 2A. Deemed Execution Date, if any 3. Trans. Code
(Instr. 8)
4. Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5)
5. Amount of Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 3 and 4)
6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4)
Code V Amount (A) or (D) Price
Class A Common Stock  6/30/2020    G   V 1450  D $0  1314835  D   
Class A Common Stock  7/1/2020    S(1)    3800  D $219.77 (2) 1311035  D   
Class A Common Stock  7/1/2020    S(1)    5575  D $220.56 (3) 1305460  D   
Class A Common Stock  7/1/2020    S(1)    2550  D $221.57 (4) 1302910  D   
Class A Common Stock  7/1/2020    S(1)    5277  D $222.88 (5) 1297633  D   
Class A Common Stock  7/1/2020    S(1)    5400  D $223.63 (6) 1292233  D   
Class A Common Stock  7/1/2020    S(1)    6014  D $224.75 (7) 1286219  D   
Class A Common Stock  7/1/2020    S(1)    200  D $255.21 (8) 1286019  D   
Class A Common Stock  7/2/2020    S    5196  D $222.85  1280823  D   
Class A Common Stock  7/2/2020    S    111  D $224.28 (9) 1280712  D   
Class A Common Stock  7/1/2020    S(1)    700  D $219.88 (10) 294300  I  By Trust 
Class A Common Stock  7/1/2020    S(1)    400  D $220.60 (11) 293900  I  By Trust 
Class A Common Stock  7/1/2020    S(1)    100  D $221.52  293800  I  By Trust 
Class A Common Stock  7/1/2020    S(1)    3300  D $223.24 (12) 290500  I  By Trust 
Class A Common Stock  7/1/2020    S(1)    2846  D $224.29 (13) 287654  I  By Trust 
Class A Common Stock  7/1/2020    S(1)    154  D $225  287500  I  By Trust 

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivate Security
(Instr. 3)
2. Conversion or Exercise Price of Derivative Security 3. Trans. Date 3A. Deemed Execution Date, if any 4. Trans. Code
(Instr. 8)
5. Number of Derivative Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5)
6. Date Exercisable and Expiration Date 7. Title and Amount of Securities Underlying Derivative Security
(Instr. 3 and 4)
8. Price of Derivative Security
(Instr. 5)
9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4)
Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares

Explanation of Responses:
(1)  The transactions were pursuant to a Rule 10b5-1 trading plan adopted by the reporting person.
(2)  The price reported is a weighted average sales price. The shares were sold in multiple transactions at prices ranging from $219.14 to $220.13, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer or the staff of the Securities Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote.
(3)  The price reported is a weighted average sales price. The shares were sold in multiple transactions at prices ranging from $220.17 to $221.16, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer or the staff of the Securities Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote.
(4)  The price reported is a weighted average sales price. The shares were sold in multiple transactions at prices ranging from $221.17 to $222.15, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer or the staff of the Securities Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote.
(5)  The price reported is a weighted average sales price. The shares were sold in multiple transactions at prices ranging from $222.17 to $223.16, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer or the staff of the Securities Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote.
(6)  The price reported is a weighted average sales price. The shares were sold in multiple transactions at prices ranging from $223.19 to $224.14, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer or the staff of the Securities Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote.
(7)  The price reported is a weighted average sales price. The shares were sold in multiple transactions at prices ranging from $224.19 to $225.18, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer or the staff of the Securities Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote.
(8)  The price reported is a weighted average sales price. The shares were sold in multiple transactions at prices ranging from $225.19 to $225.22, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer or the staff of the Securities Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote.
(9)  The price reported is a weighted average sales price. The shares were sold in multiple transactions at prices ranging from $224.17 to $224.62, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer or the staff of the Securities Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote.
(10)  The price reported is a weighted average sales price. The shares were sold in multiple transactions at prices ranging from $219.35 to $220.25, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer or the staff of the Securities Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote.
(11)  The price reported is a weighted average sales price. The shares were sold in multiple transactions at prices ranging from $220.38 to $221.17, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer or the staff of the Securities Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote.
(12)  The price reported is a weighted average sales price. The shares were sold in multiple transactions at prices ranging from $222.73 to $223.70, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer or the staff of the Securities Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote.
(13)  The price reported is a weighted average sales price. The shares were sold in multiple transactions at prices ranging from $223.80 to $224.75, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer or the staff of the Securities Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote.

Reporting Owners
Reporting Owner Name / Address
Relationships
Director 10% Owner Officer Other
Horowitz Eliot
C/O MONGODB, INC.
1633 BROADWAY, 38TH FLOOR
NEW YORK, NY 10019
X
Chief Technology Officer

Signatures
/s/ Sophie Hubscher, Attorney-in-Fact 7/6/2020
**Signature of Reporting Person Date
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