TDG Dark Pool Activity
Transdigm Group Inc
Data as of Oct 23, 2026 · Source: FINRA daily short sale volume (off-exchange)
On Oct 23, 2026, FINRA reported 180K TDG shares in publicly disseminated off-exchange trades (dark pools and other off-exchange venues). 98K of those shares (54.4%) were marked short or short-exempt, above TDG's 30-day rolling average of 52.0% (z-score 0.27). Over the last 10 FINRA sessions (Oct 12, 2026 – Oct 23, 2026), TDG's off-exchange short volume ratio ranged from 36.1% to 59.4% and averaged 50.0%; the latest reading is above that 10-session average.
Off-Exchange Volume
180K
Short Volume
98K
Short Volume Ratio
54.4%
30-Day Average
52.0%
z-score 0.27
Daily readings — last 10 FINRA sessions
| Date | Off-exchange shares | Short shares | Short ratio |
|---|---|---|---|
| Oct 12, 2026 | 140K | 72K | 51.7% |
| Oct 13, 2026 | 154K | 66K | 42.7% |
| Oct 14, 2026 | 109K | 55K | 50.1% |
| Oct 15, 2026 | 112K | 59K | 52.8% |
| Oct 16, 2026 | 185K | 109K | 58.9% |
| Oct 19, 2026 | 122K | 73K | 59.4% |
| Oct 20, 2026 | 129K | 67K | 51.8% |
| Oct 21, 2026 | 136K | 57K | 41.7% |
| Oct 22, 2026 | 215K | 78K | 36.1% |
| Oct 23, 2026 Latest | 180K | 98K | 54.4% |
Source: FINRA daily short sale volume (off-exchange). Ratio = ShortVolume ÷ TotalVolume for the day.
TDG dark pool FAQ
- How much TDG off-exchange volume did FINRA report on Oct 23, 2026?
- FINRA's daily short sale volume file reported 180K TDG shares in publicly disseminated off-exchange trades on Oct 23, 2026; 98K of those shares (54.4%) were marked short or short-exempt.
- Is TDG's dark pool short volume ratio unusual right now?
- As of Oct 23, 2026, TDG's short volume ratio of 54.4% is above TDG's 30-day rolling average of 52.0% (z-score 0.27). 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.