X0206 3 2017-10-18 0 0001441816 MongoDB, Inc. MDB 0001237861 RYAN KEVIN P C/O MONGODB, INC. 229 WEST 43RD STREET, 5TH FLOOR NEW YORK NY 10036 1 0 0 0 Class A Common Stock 0 D Series B Preferred Stock Class B Common Stock 131661 D Class B Common Stock Class A Common Stock 1866994 D Class B Common Stock Class A Common Stock 1018166 I By Trust Each share of the Series B Preferred Stock will automatically convert into approximately 0.75 shares of Class B Common Stock upon the closing of the Issuer's initial public offering. The Series B Preferred Stock has no expiration date. 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. These shares are held by The Kevin P. Ryan 2012 Trust (the "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. Exhibit List - Exhibit 24 - Power of Attorney /s/Alison Haggerty, Attorney-in-Fact 2017-10-18