MDB Dark Pool Activity
Mongodb, Inc.
Data as of Oct 23, 2026 · Source: FINRA daily short sale volume (off-exchange)
On Oct 23, 2026, FINRA reported 607K MDB shares in publicly disseminated off-exchange trades (dark pools and other off-exchange venues). 258K of those shares (42.4%) were marked short or short-exempt, below MDB's 30-day rolling average of 48.4% (z-score -0.65). Over the last 10 FINRA sessions (Oct 12, 2026 – Oct 23, 2026), MDB's off-exchange short volume ratio ranged from 37.1% to 61.3% and averaged 46.5%; the latest reading is below that 10-session average.
Off-Exchange Volume
607K
Short Volume
258K
Short Volume Ratio
42.4%
30-Day Average
48.4%
z-score -0.65
Daily readings — last 10 FINRA sessions
| Date | Off-exchange shares | Short shares | Short ratio |
|---|---|---|---|
| Oct 12, 2026 | 486K | 298K | 61.3% |
| Oct 13, 2026 | 1.5M | 840K | 57.3% |
| Oct 14, 2026 | 632K | 343K | 54.3% |
| Oct 15, 2026 | 577K | 258K | 44.6% |
| Oct 16, 2026 | 1.3M | 651K | 48.3% |
| Oct 19, 2026 | 687K | 273K | 39.7% |
| Oct 20, 2026 | 571K | 240K | 42.0% |
| Oct 21, 2026 | 1.1M | 416K | 37.6% |
| Oct 22, 2026 | 774K | 287K | 37.1% |
| Oct 23, 2026 Latest | 607K | 258K | 42.4% |
Source: FINRA daily short sale volume (off-exchange). Ratio = ShortVolume ÷ TotalVolume for the day.
MDB dark pool FAQ
- How much MDB off-exchange volume did FINRA report on Oct 23, 2026?
- FINRA's daily short sale volume file reported 607K MDB shares in publicly disseminated off-exchange trades on Oct 23, 2026; 258K of those shares (42.4%) were marked short or short-exempt.
- Is MDB's dark pool short volume ratio unusual right now?
- As of Oct 23, 2026, MDB's short volume ratio of 42.4% is below MDB's 30-day rolling average of 48.4% (z-score -0.65). Meridian's dark pool model does not flag this reading as an anomaly.
- What does the dark pool short volume ratio measure?
- FINRA publishes daily short sale volume for trades reported off-exchange to its trade reporting facilities, which include dark pools and other off-exchange venues. The ratio divides FINRA's ShortVolume figure, which counts both short and short-exempt sales, by the total off-exchange shares reported for that day. It is not short interest and not a directional signal: market-maker hedging and reporting mechanics can raise it, so it is context for other signals.