MongoDB, Inc.

Rule 10b5-1 and Non-Rule 10b5-1 Trading Arrangements

Certain executive officers and directors of the Company may execute purchases and sales of the Company's common stock through Rule 10b5-1 equity trading plans and “non-Rule 10b5-1 equity trading arrangements” (as defined in Item 408(c) of Regulation S-K).

During the three months ended April 30, 2026, one of our former executive officers engaged in the following Rule 10b5-1 trading arrangements:

On March 6, 2026, Cedric Pech, our former President of Field Operations, terminated a previously disclosed trading plan intended to satisfy the conditions under Rule 10b5-1(c) of the Exchange Act, which had been entered into on December 24, 2025. The terminated plan provided for the potential sale of up to 100% of the (net) shares of common stock resulting from the vesting of an aggregate of 25,571 RSUs and PSUs in amounts and prices determined in accordance with a formula set forth in the plan (net shares are net of tax withholding) over a period scheduled to end on the earlier of (i) the date that all the shares under the plan were sold and (ii) December 31, 2026, subject to early termination for certain specified events set forth in the plan. No further transactions will occur under the terminated plan.

During the three months ended April 30, 2026, other than noted above, none of our executive officers or directors terminated or modified a 10b5-1 equity trading plan, oradopted, terminated, or modified any “non-Rule 10b5-1 equity trading arrangement.