X0508 4 2026-01-01 0 0001441816 MongoDB, Inc. MDB 0001767034 Pech Cedric C/O MONGODB, INC. 1633 BROADWAY, 38TH FLOOR NEW YORK NY 10019 0 1 0 0 President, Field Operations 0 Common Stock 2026-01-01 4 F 0 346 419.69 D 56587 D Represents shares of common stock withheld by the Issuer to satisfy tax withholding obligations for the Reporting Person due upon the vesting of Restricted Stock Units previously granted to the Reporting Person. /s/ Paul Johnston, Attorney-in-Fact 2026-01-05