** Database software firm MongoDB's MDB.O shares rise 3.2% to $269.51 premarket after Mizuho upgrades to "outperform" from "neutral"
** Brokerage raises PT to $325 from $290, implying a 24.4% upside to stock's last close
** Notes improved growth; co added record 10.7k customers in FY26, up 60% year-on-year
** We see AI as a structural tailwind, with vibe coding expanding application creation and AI-enabled apps requiring more database workloads per application - Mizuho
** Avgerage rating of 42 analysts is "buy;" their median PT is $366 - data compiled by LSEG
** As of last close, stock has fallen 37.8% so far this year
(Reporting by Anhata Rooprai in Bengaluru)
((Anhata.Rooprai@thomsonreuters.com))