X0306 4 2017-10-23 0 0001441816 MongoDB, Inc. MDB 0001222287 BOTHA ROELOF 2800 SAND HILL ROAD, SUITE 101 MENLO PARK CA 94025 1 0 1 0 Series C Redeemable Convertible Preferred Stock 2017-10-23 4 C 0 3681872 0.00 D Class B Common Stock 2761404 0 I By Sequoia Capital U.S. Venture 2010 Fund, LP Series C Redeemable Convertible Preferred Stock 2017-10-23 4 C 0 404743 0.00 D Class B Common Stock 303557 0 I By Sequoia Capital U.S. Venture 2010 Partners Fund (Q), LP Series C Redeemable Convertible Preferred Stock 2017-10-23 4 C 0 81699 0.00 D Class B Common Stock 61274 0 I By Sequoia Capital U.S. Venture 2010 Partners Fund, LP Series D Redeemable Convertible Preferred Stock 2017-10-23 4 C 0 287575 0.00 D Class B Common Stock 215681 0 I By Sequoia Capital U.S. Venture 2010 Fund, LP Series D Redeemable Convertible Preferred Stock 2017-10-23 4 C 0 31468 0.00 D Class B Common Stock 23601 0 I By Sequoia Capital U.S. Venture 2010 Partners Fund (Q), LP Series D Redeemable Convertible Preferred Stock 2017-10-23 4 C 0 6378 0.00 D Class B Common Stock 4783 0 I By Sequoia Capital U.S. Venture 2010 Partners Fund, LP Series D Redeemable Convertible Preferred Stock 2017-10-23 4 C 0 3294250 0.00 D Class B Common Stock 2470687 0 I By Sequoia Capital U.S. Growth Fund IV, LP Series D Redeemable Convertible Preferred Stock 2017-10-23 4 C 0 145142 0.00 D Class B Common Stock 108856 0 I By Sequoia Capital USGF Principals Fund IV, L.P. Series E Redeemable Convertible Preferred Stock 2017-10-23 4 C 0 840325 0.00 D Class B Common Stock 630243 0 I By Sequoia Capital U.S. Growth Fund IV, LP Series E Redeemable Convertible Preferred Stock 2017-10-23 4 C 0 37024 0.00 D Class B Common Stock 27768 0 I By Sequoia Capital USGF Principals Fund IV, L.P. Series F Redeemable Convertible Preferred Stock 2017-10-23 4 C 0 572704 0.00 D Class B Common Stock 286352 0 I By Sequoia Capital U.S. Growth Fund IV, LP Series F Redeemable Convertible Preferred Stock 2017-10-23 4 C 0 25233 0.00 D Class B Common Stock 12616 0 I By Sequoia Capital USGF Principals Fund IV, L.P. Class B Common Stock 2017-10-23 4 J 0 2977085 0.00 A Class A Common Stock 2977085 2977085 I By Sequoia Capital U.S. Venture 2010 Fund, LP Class B Common Stock 2017-10-23 4 J 0 327158 0.00 A Class A Common Stock 327158 327158 I By Sequoia Capital U.S. Venture 2010 Partners Fund (Q), LP Class B Common Stock 2017-10-23 4 J 0 66057 0.00 A Class A Common Stock 66057 66057 I By Sequoia Capital U.S. Venture 2010 Partners Fund, LP Class B Common Stock 2017-10-23 4 J 0 3387282 0.00 A Class A Common Stock 3387282 3387282 I By Sequoia Capital U.S. Growth Fund IV, LP Class B Common Stock 2017-10-23 4 J 0 149240 0.00 A Class A Common Stock 149240 149240 I By Sequoia Capital USGF Principals Fund IV, L.P. The Series C Redeemable Convertible Preferred Stock automatically converted into Class B Common Stock on a 1:0.75 basis immediately prior to the closing of the Issuer's initial public offering and had no expiration date. The Reporting Person is a director of SC US (TTGP), Ltd. SC US (TTGP), Ltd. is the general partner of SC U.S. Venture 2010 Management, L.P., which is the general partner of each of Sequoia Capital U.S. Venture 2010 Fund, LP, Sequoia Capital U.S. Venture 2010 Partners Fund (Q), LP and Sequoia Capital U.S. Venture 2010 Partners Fund, LP, or collectively, the SC 2010 Funds. The Reporting Person disclaims beneficial ownership of the securities held by the SC 2010 Funds except to the extent of his pecuniary interest therein, and the inclusion of these securities in this report shall not be deemed an admission of beneficial ownership of the reported securities for purposes of Section 16 or for any other purposes. The Series D Redeemable Convertible Preferred Stock automatically converted into Class B Common Stock on a 1:0.75 basis immediately prior to the closing of the Issuer's initial public offering and had no expiration date. The Reporting Person is a director of SC US (TTGP), Ltd. SC US (TTGP), Ltd. is the general partner of SCGF IV Management, L.P., which is the general partner of Sequoia Capital U.S. Growth Fund IV, L.P. and Sequoia Capital USGF Principals Fund IV, L.P., or collectively, the SC GFIV Funds. The Reporting Person disclaims beneficial ownership of the securities held by the SC GFIV Funds except to the extent of his pecuniary interest therein, and the inclusion of these securities in this report shall not be deemed an admission of beneficial ownership of the reported securities for purposes of Section 16 or for any other purposes. The Series E Redeemable Convertible Preferred Stock automatically converted into Class B Common Stock on a 1:0.75 basis immediately prior to the closing of the Issuer's initial public offering and had no expiration date. The Series F Redeemable Convertible Preferred Stock automatically converted into Class B Common Stock on a 1:0.5 basis immediately prior to the closing of the Issuer's initial public offering and had 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 a 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 in effect as of the date hereof, or (ii) at such time as the outstanding shares of Class B common stock represent less than 10% of the aggregate voting power of the Issuer's capital stock. Immediately prior to the closing of the Issuer's initial public offering, each series of the Issuer's redeemable convertible preferred stock automatically converted into Class B Common Stock. /s/ Jung Yeon Son, by power of attorney for Roelof F. Botha 2017-10-25