SEC FORM 3 SEC Form 3
FORM 3 UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940
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1. Name and Address of Reporting Person*
Horowitz Eliot

(Last) (First) (Middle)
C/O MONGODB, INC.
229 WEST 43RD STREET, 5TH FLOOR

(Street)
NEW YORK NY 10036

(City) (State) (Zip)
2. Date of Event Requiring Statement (Month/Day/Year)
10/18/2017
3. Issuer Name and Ticker or Trading Symbol
MongoDB, Inc. [ MDB ]
4. 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
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 0 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
Class B Common Stock (1) (1) Class A Common Stock 1,511,324 (1) D
Class B Common Stock (1) (1) Class A Common Stock 375,000 (1) I By Trust(2)
Employee Stock Option (Right to Buy) (3) 03/07/2023 Class B Common Stock 225,000 5.72 D
Employee Stock Option (Right to Buy) (4) 04/22/2025 Class B Common Stock 100,000 6.5 D
Employee Stock Option (Right to Buy) (5) 04/13/2026 Class B Common Stock 200,000 6.5 D
Explanation of Responses:
1. Each share of Class B Common Stock is convertible at any time at the option of the Reporting Person into one share of Class A Common Stock and has no expiration date. Upon the closing of the Issuer's sale of its Class A Common Stock in its firm commitment underwritten initial public offering pursuant to its registration statement on Form S-1 (File No. 333-220557) under the Securities Act of 1933, as amended, the Class B Common Stock will convert automatically into Class A Common Stock on the same basis upon the earlier of: (i) any transfer, whether or not for value, except for certain "Permitted Transfers" as defined in the Issuer's restated certificate of incorporation, and (ii) at such time as the outstanding shares of Class B common stock represent less than 10% of the aggregate number of shares of the Issuer's capital stock outstanding.
2. These shares are held by The ERH Family 2012 Trust for the benefit of the Reporting Person's children. The Reporting Person is the trustee of the Trust. The Reporting Person disclaims beneficial ownership of these securities, and the filing of this report is not an admission that the Reporting Person is the beneficial owner of these securities for purposes of Section 16 or for any other purpose.
3. Immediately exercisable and fully vested.
4. 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. 66,666 shares are vested. The remaining shares shall vest in 16 equal monthly installments beginning on November 1, 2017, subject to the Reporting Person providing continuous service to the Issuer on each such date.
5. 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. 33,744 are vested. The remaining shares shall vest as to (i) 21,248 shares in 6 equal monthly installments beginning on November 13, 2017, (ii) 45,000 shares in 12 equal monthly installments beginning on May 13, 2018, and (iii) 100,008 shares in 24 equal monthly installments beginning on May 13, 2019, in each case, subject to the Reporting Person providing continuous service to the Issuer on each such date.
Remarks:
Exhibit List - Exhibit 24 - Power of Attorney
/s/Alison Haggerty, Attorney-in-Fact 10/18/2017
** 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.
POWER OF ATTORNEY

(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 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 Company;

	(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 applicable.  

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


Date:  October 3, 2017				

By: /s/Eliot Horowitz					
Eliot Horowitz