NTRA Dark Pool Activity
Natera, Inc.
Data as of Oct 23, 2026 · Source: FINRA daily short sale volume (off-exchange)
On Oct 23, 2026, FINRA reported 584K NTRA shares in publicly disseminated off-exchange trades (dark pools and other off-exchange venues). 226K of those shares (38.6%) were marked short or short-exempt, below NTRA's 30-day rolling average of 47.7% (z-score -1.07). Over the last 10 FINRA sessions (Oct 12, 2026 – Oct 23, 2026), NTRA's off-exchange short volume ratio ranged from 38.6% to 58.2% and averaged 47.0%; the latest reading is below that 10-session average.
Off-Exchange Volume
584K
Short Volume
226K
Short Volume Ratio
38.6%
30-Day Average
47.7%
z-score -1.07
Daily readings — last 10 FINRA sessions
| Date | Off-exchange shares | Short shares | Short ratio |
|---|---|---|---|
| Oct 12, 2026 | 507K | 219K | 43.1% |
| Oct 13, 2026 | 521K | 222K | 42.6% |
| Oct 14, 2026 | 421K | 186K | 44.2% |
| Oct 15, 2026 | 519K | 230K | 44.4% |
| Oct 16, 2026 | 763K | 407K | 53.4% |
| Oct 19, 2026 | 682K | 349K | 51.2% |
| Oct 20, 2026 | 361K | 163K | 45.0% |
| Oct 21, 2026 | 629K | 366K | 58.2% |
| Oct 22, 2026 | 908K | 450K | 49.6% |
| Oct 23, 2026 Latest | 584K | 226K | 38.6% |
Source: FINRA daily short sale volume (off-exchange). Ratio = ShortVolume ÷ TotalVolume for the day.
NTRA dark pool FAQ
- How much NTRA off-exchange volume did FINRA report on Oct 23, 2026?
- FINRA's daily short sale volume file reported 584K NTRA shares in publicly disseminated off-exchange trades on Oct 23, 2026; 226K of those shares (38.6%) were marked short or short-exempt.
- Is NTRA's dark pool short volume ratio unusual right now?
- As of Oct 23, 2026, NTRA's short volume ratio of 38.6% is below NTRA's 30-day rolling average of 47.7% (z-score -1.07). 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.