144 0001237858 XXXXXXXX LIVE 0001441816 MongoDB, Inc. 001-38240 1633 BROADWAY 38TH FLOOR NEW YORK NY 10019 866-237-8815 MERRIMAN DWIGHT A Director Common Wells Fargo Clearing Services

One North Jefferson Avenue St. Louis MO 63103

6000 2592236.75 72177636 03/04/2024 NASDAQ Common 10/18/2017 Founders Shares Issuer N 6000 10/18/2017 N/A N Dwight Merriman

1633 Broadway, 38th Floor New York NY 10019

MongoDB, Inc. 12/04/2023 6000 2623335.83 Dwight Merriman

1633 Broadway, 38th Floor New York NY 10019

MongoDB, inc. 12/28/2023 2375 986773.15 DAM 2012 Trust LLC

1633 Broadway, 38th Floor New York NY 10019

MongoDB, inc. 01/02/2024 1000 401573.79 Dwight Merriman

1633 Broadway, 38th Floor New York NY 10019

MongoDB, Inc. 01/03/2024 6000 2245727.06 DAM 2012 Trust LLC

1633 Broadway, 38th Floor New York NY 10019

MongoDB, Inc. 01/22/2024 1000 419864.64 DAM 2012 Trust LLC

1633 Broadway, 38th Floor New York NY 10019

MongoDB, Inc. 02/01/2024 1000 404058.26 DAM 2012 Trust LLC

1633 Broadway, 38th Floor New York NY 10019

MongoDB, inc. 02/02/2024 1000 419864.64 Dwight Merriman

1633 Broadway, 38th Floor New York NY 10019

MongoDB, Inc. 02/05/2024 6000 2627286.99 Dwight Merriman

1633 Broadway, 38th Floor New York NY 10019

MongoDB, Inc. 02/08/2024 2000 930607.57 DAM 2012 Trust LLC

1633 Broadway, 38th Floor New York NY 10019

MongoDB, inc. 03/01/2024 2000 873350.98 . 03/04/2024 04/06/2023 Dwight A Merriman