TMO Dark Pool Activity
Thermo Fisher Scientific Inc.
Data as of Sep 10, 2026 · Source: FINRA daily short sale volume (off-exchange)
On Sep 10, 2026, FINRA reported 603K TMO shares in publicly disseminated off-exchange trades (dark pools and other off-exchange venues). 358K of those shares (59.4%) were marked short or short-exempt, above TMO's 30-day rolling average of 46.5% (z-score 2.07).
Off-Exchange Volume
603K
Short Volume
358K
Short Volume Ratio
59.4%
30-Day Average
46.5%
z-score 2.07
Flagged as an anomaly
Meridian's dark pool model flags TMO's reading on Sep 10, 2026 as an anomaly (z-score 2.07 versus its 30-day rolling average).
TMO dark pool FAQ
- How much TMO off-exchange volume did FINRA report on Sep 10, 2026?
- FINRA's daily short sale volume file reported 603K TMO shares in publicly disseminated off-exchange trades on Sep 10, 2026; 358K of those shares (59.4%) were marked short or short-exempt.
- Is TMO's dark pool short volume ratio unusual right now?
- As of Sep 10, 2026, TMO's short volume ratio of 59.4% is above TMO's 30-day rolling average of 46.5% (z-score 2.07). Meridian's dark pool model flags 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.