X0609 4 2026-10-12 0 0001441816 MongoDB, Inc. MDB 0001397383 Ittycheria Dev false C/O MONGODB, INC. 1633 BROADWAY, 38TH FLOOR NEW YORK NY 10019 1 1 0 0 Interim President and CEO 0 Common Stock 2026-10-12 4 A 0 40817 0 A 196510 D 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 four equal quarterly installments over one year measured from October 1, 2026, subject to the Reporting Person's continued service with the Issuer. /s/ Andrew Stephens, Attorney-in-Fact 2026-10-14