X0609 4 2026-03-17 0 0001441816 MongoDB, Inc. MDB 0001269088 BERRY MICHAEL J C/O MONGODB, INC. 1633 BROADWAY, 38TH FLOOR NEW YORK NY 10019 0 1 0 0 Chief Financial Officer 0 Common Stock 2026-03-17 4 A 0 17002 0 A 84788 D Common Stock 11500 I By Trust This security represents restricted stock units ("RSUs"). Each RSU represents a contingent right to receive one share of Common Stock of the Issuer. This RSU award vests in equal quarterly installments over four years measured from April 1, 2026, subject to the Reporting Person's continued service with the Issuer. Includes 50 shares purchased under the Issuer's Employee Stock Purchase Plan on December 15, 2025. Such shares were not previously reportable under Section 16. This number excludes 11,500 shares previously reported as owned directly by the Reporting Person that are instead held by The Berry Family Trust. These shares are held by The Berry Family Trust, a revocable trust of which the Reporting Person is a trustee. /s/ Gahee Lee, Attorney in Fact 2026-03-19