144 0001392352 XXXXXXXX LIVE 0001441816 MONGODB, INC. 001-38240 1633 Broadway, 38th Floor New York NY 10019 6467274092 HOPE COCHRAN Director COMMON Morgan Stanley Smith Barney LLC Executive Financial Services

1 New York Plaza 8th Floor New York NY 10004

3132 766619.64 80369527 04/01/2026 NASDAQ Common 04/01/2026 Exercise of Stock Options Issuer N 3132 04/01/2026 Cash Y The securities to be sold were and will be received upon the exercise of stock options over the next three months. The dates of acquisition and payment were and will be the dates of exercise/sale. 04/01/2026 09/16/2025 /s/ Hope Cochran