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

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8000 1894059.10 80369527 04/14/2026 NASDAQ Common 10/18/2017 Founders Shares Issuer N 8000 10/18/2017 N/A N Dwight A Merriman Charitable Foundation

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MongoDB, Inc. 02/17/2026 1200 436543.00 Dwight Merriman

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MongoDB, Inc. 02/13/2026 10000 3550534.47 DAM 2012 Trust LLC

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MongoDB, Inc. 02/12/2026 6000 2191917.78 Dwight A Merriman Charitable Foundation

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MongoDB, Inc. 02/02/2026 1190 439745.50 Dwight A Merriman Charitable Foundation

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MongoDB, Inc. 01/15/2026 1139 442028.09 Dwight Merriman

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MongoDB, Inc. 01/14/2026 10000 4075900.88 Dwight Merriman

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MongoDB, Inc 03/13/2026 8000 2078628.95 DAM 2012 Trust LLC

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MongoDB, Inc. 03/16/2026 4000 1043662.61 04/14/2026 06/20/2025 Dwight A Merriman