MDB ▼ -0.5% - MongoDB, Inc. $MDB MDB - MongoDB, Inc. to Host Investor Day in New York City MongoDB fell 0.5% today following an announcement that the company will host an investor day in New York City. Investor days typically provide detailed business outlooks and strategic updates, which may have prompted profit-taking ahead of the event or reflect modest caution about near-term guidance before the presentation. 11-SEP-2026 10:01 AM ET