X0306 4 2019-06-10 1 0001441816 MongoDB, Inc. MDB 0001607841 SC US (TTGP), LTD. C/O SEQUOIA CAPITAL 2800 SAND HILL ROAD, SUITE 101 MENLO PARK CA 94025 0 0 1 0 0001611355 SC U.S. VENTURE 2010 MANAGEMENT, L.P. C/O SEQUOIA CAPITAL 2800 SAND HILL ROAD, SUITE 101 MENLO PARK CA 94025 0 0 1 0 0001488811 SEQUOIA CAPITAL U.S. VENTURE 2010 FUND, L.P. C/O SEQUOIA CAPITAL 2800 SAND HILL ROAD, SUITE 101 MENLO PARK CA 94025 0 0 1 0 0001499293 Sequoia Capital U.S. Venture 2010 Partners Fund (Q), L.P. C/O SEQUOIA CAPITAL 2800 SAND HILL ROAD, SUITE 101 MENLO PARK CA 94025 0 0 1 0 0001499256 Sequoia Capital U.S. Venture 2010 Partners Fund, L.P. C/O SEQUOIA CAPITAL 2800 SAND HILL ROAD, SUITE 101 MENLO PARK CA 94025 0 0 1 0 0001447940 SCGF IV MANAGEMENT LP 2800 SAND HILL ROAD, SUITE 101 MENLO PARK CA 94025 0 0 1 0 0001444121 SEQUOIA CAPITAL US GROWTH FUND IV LP C/O SEQUOIA CAPITAL 2800 SAND HILL ROAD, SUITE 101 MENLO PARK CA 94025 0 0 1 0 0001460980 SEQUOIA CAPITAL USGF PRINCIPALS FUND IV LP C/O SEQUOIA CAPITAL 2800 SAND HILL ROAD, SUITE 101 MENLO PARK CA 94025 0 0 1 0 Class A Common Stock 2019-06-10 4 C 0 846821 0.00 A 846821 I By Sequoia Capital U.S. Growth Fund IV, L.P. Class A Common Stock 2019-06-10 4 C 0 37310 0.00 A 37310 I By Sequoia Capital USGF Principals Fund IV, L.P. Class A Common Stock 2019-06-10 4 C 0 744271 0.00 A 744271 I By Sequoia Capital U.S. Venture 2010 Fund, LP Class A Common Stock 2019-06-10 4 C 0 81790 0.00 A 81790 I By Sequoia Capital U.S. Venture 2010 Partners Fund (Q), LP Class A Common Stock 2019-06-10 4 C 0 16514 0.00 A 16514 I By Sequoia Capital U.S. Venture 2010 Partners Fund, LP Class A Common Stock 2019-06-10 4 J 0 846821 0.00 D 0 I By Sequoia Capital U.S. Growth Fund IV, L.P. Class A Common Stock 2019-06-10 4 J 0 37310 0.00 D 0 I By Sequoia Capital USGF Principals Fund IV, L.P. Class A Common Stock 2019-06-10 4 J 0 744271 0.00 D 0 I By Sequoia Capital U.S. Venture 2010 Fund, LP Class A Common Stock 2019-06-10 4 J 0 81790 0.00 D 0 I By Sequoia Capital U.S. Venture 2010 Partners Fund (Q), LP Class A Common Stock 2019-06-10 4 J 0 16514 0.00 D 0 I By Sequoia Capital U.S. Venture 2010 Partners Fund, LP Class B Common Stock 2019-06-10 4 C 0 846821 0.00 D Class A Common Stock 846821 1693640 I By Sequoia Capital U.S. Growth Fund IV, L.P. Class B Common Stock 2019-06-10 4 C 0 37310 0.00 D Class A Common Stock 37310 74620 I By Sequoia Capital USGF Principals Fund IV, L.P. Class B Common Stock 2019-06-10 4 C 0 744271 0.00 D Class A Common Stock 744271 1488543 I By Sequoia Capital U.S. Venture 2010 Fund, LP Class B Common Stock 2019-06-10 4 C 0 81790 0.00 D Class A Common Stock 81790 163578 I By Sequoia Capital U.S. Venture 2010 Partners Fund (Q), LP Class B Common Stock 2019-06-10 4 C 0 16514 0.00 D Class A Common Stock 16514 33029 I By Sequoia Capital U.S. Venture 2010 Partners Fund, LP 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. Each of the Reporting Persons disclaims beneficial ownership of these securities except to the extent of its 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. SC US (TTGP), Ltd. is the sole general partner of SC U.S. Venture 2010 Management, L.P., which is the sole general partner of each of Sequoia Capital U.S. Venture 2010 Fund, LP, Sequoia Capital U.S. Venture 2010 Partners Fund, LP and Sequoia Capital U.S. Venture 2010 Partners Fund (Q), LP, or collectively, the Venture 2010 Funds. Each of the Reporting Persons disclaims beneficial ownership of these securities except to the extent of its 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. Represents a distribution of Class A Common Stock of the Issuer to partners or members and includes subsequent distributions by general partners or managing members to their respective partners or members. Each share of Class B Common Stock is convertible into one share of Class A Common Stock at the option of the holder and has no expiration date. /s/ Jung Yeon Son, by power of attorney for Roelof Botha, a Director of SC US (TTGP), Ltd. 2019-06-12 /s/ Jung Yeon Son, by power of attorney for Roelof Botha, a Director of SC US (TTGP), Ltd., the general partner of SC U.S. Venture 2010 Management, L.P. 2019-06-12 /s/ Jung Yeon Son, by power of attorney for Roelof Botha, a Director of SC US (TTGP), Ltd., the general partner of SC U.S. Venture 2010 Management, L.P., the general partner of Sequoia Capital U.S. Venture 2010 Fund, LP. 2019-06-12 /s/ Jung Yeon Son, by power of attorney for Roelof Botha, a Director of SC US (TTGP), Ltd., the general partner of SC U.S. Venture 2010 Management, L.P., the general partner of Sequoia Capital U.S. Venture 2010 Partners Fund (Q), LP. 2019-06-12 /s/ Jung Yeon Son, by power of attorney for Roelof Botha, a Director of SC US (TTGP), Ltd., the general partner of SC U.S. Venture 2010 Management, L.P., the general partner of Sequoia Capital U.S. Venture 2010 Partners Fund, LP. 2019-06-12 /s/ Jung Yeon Son, by power of attorney for Roelof Botha, a Director of SC US (TTGP), Ltd., the general partner of SCGF IV Management, L.P. 2019-06-12 /s/ Jung Yeon Son, by power of attorney for Roelof Botha, a Director of SC US (TTGP), Ltd., the general partner of SCGF IV Management, L.P., the general partner of Sequoia Capital U.S. Growth Fund IV, L.P. 2019-06-12 /s/ Jung Yeon Son, by power of attorney for Roelof Botha, a Director of SC US (TTGP), Ltd., the general partner of SCGF IV Management, L.P., the general partner of Sequoia Capital USGF Principals Fund IV, L.P. 2019-06-12