Transaction Details

Footnotes

The transaction was pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person. | The price reported is a weighted average price. The shares were sold in multiple transactions at prices ranging from $318.08 to $319.05, inclusive. The Reporting Person undertakes to provide to the Company, any security holder of the Company or the staff of the Securities Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote. | The price reported is a weighted average price. The shares were sold in multiple transactions at prices ranging from $319.10 to $320.09, inclusive. The Reporting Person undertakes to provide to the Company, any security holder of the Company or the staff of the Securities Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote. | The price reported is a weighted average price. The shares were sold in multiple transactions at prices ranging from $320.14 to $321.13, inclusive. The Reporting Person undertakes to provide to the Company, any security holder of the Company or the staff of the Securities Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote. | The price reported is a weighted average price. The shares were sold in multiple transactions at prices ranging from $321.14 to $321.96, inclusive. The Reporting Person undertakes to provide to the Company, any security holder of the Company or the staff of the Securities Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote. | The price reported is a weighted average price. The shares were sold in multiple transactions at prices ranging from $322.61 to $322.84, inclusive. The Reporting Person undertakes to provide to the Company, any security holder of the Company or the staff of the Securities Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote. | The price reported is a weighted average price. The shares were sold in multiple transactions at prices ranging from $320.07 to $320.09, inclusive. The Reporting Person undertakes to provide to the Company, any security holder of the Company or the staff of the Securities Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote. | These shares are held by The Dwight A. Merriman 2012 Trust for the benefit of the Reporting Person's children. | The Dwight A. Merriman Charitable Foundation is a Delaware nonstock nonprofit corporation. The Reporting Person is deemed to have voting and investment power over the shares of MongoDB, Inc. Class A Common Stock held by the Dwight A. Merriman Charitable Foundation, but has no pecuniary interest in these shares.