X0609 4 2026-04-01 0 0001441816 MongoDB, Inc. MDB 0001397383 Ittycheria Dev false C/O MONGODB, INC. 1633 BROADWAY, 38TH FLOOR NEW YORK NY 10019 1 0 0 0 0 Common Stock 2026-04-01 4 A 0 17218 0 A 200870 D Common Stock 2026-04-01 4 A 0 5653 0 A 206523 D Common Stock 2026-04-01 4 A 0 1249 0 A 207772 D Common Stock 2026-04-01 4 A 0 20452 0 A 228224 D Common Stock 2026-04-01 4 F 0 26462 244.77 D 201762 D Represents shares of Common Stock received upon the vesting of a portion of the performance-based restricted stock units ("PSUs") awarded to the Reporting Person on March 24, 2023 under the Issuer's long-term incentive bonus plan and 2016 Equity Incentive Plan, which vested based on the Issuer's satisfaction of certain performance criteria. In light of the performance-based vesting criteria of the PSUs, such shares were not previously reportable under Section 16. Each PSU represents the contingent right to receive one share of Common Stock of the Issuer. Represents shares of Common Stock received upon the vesting of a portion of the PSUs awarded to the Reporting Person on March 22, 2024 under the Issuer's long-term incentive bonus plan and 2016 Equity Incentive Plan, which vested based on the Issuer's satisfaction of certain performance criteria. In light of the performance-based vesting criteria of the PSUs, such shares were not previously reportable under Section 16. Each PSU represents the contingent right to receive one share of Common Stock of the Issuer Represents shares of Common Stock received upon the vesting of a portion of the PSUs awarded to the Reporting Person on March 15, 2025 under the Issuer's long-term incentive bonus plan and 2016 Equity Incentive Plan, which vested based on the Issuer's satisfaction of certain performance criteria. In light of the performance-based vesting criteria of the PSUs, such shares were not previously reportable under Section 16. Each PSU represents the contingent right to receive one share of Common Stock of the Issuer. Represents shares of Common Stock received upon the vesting of a portion of the PSUs awarded to the Reporting Person on March 20, 2025 under the Issuer's long-term incentive bonus plan and 2016 Equity Incentive Plan, which vested based on the Issuer's satisfaction of certain performance criteria. In light of the performance-based vesting criteria of the PSUs, such shares were not previously reportable under Section 16. Each PSU represents the contingent right to receive one share of Common Stock of the Issuer. Represents shares of Common Stock withheld by the Issuer to satisfy tax withholding obligations for the Reporting Person due upon the vesting of PSUs and certain Restricted Stock Units previously granted to the Reporting Person. /s/ Gahee Lee, Attorney in Fact 2026-04-03