TWST Dark Pool Activity
Twist Bioscience Corporation
Data as of Oct 23, 2026 · Source: FINRA daily short sale volume (off-exchange)
On Oct 23, 2026, FINRA reported 761K TWST shares in publicly disseminated off-exchange trades (dark pools and other off-exchange venues). 436K of those shares (57.3%) were marked short or short-exempt, above TWST's 30-day rolling average of 45.2% (z-score 1.36). Over the last 10 FINRA sessions (Oct 12, 2026 – Oct 23, 2026), TWST's off-exchange short volume ratio ranged from 32.7% to 61.5% and averaged 45.8%; the latest reading is above that 10-session average.
Off-Exchange Volume
761K
Short Volume
436K
Short Volume Ratio
57.3%
30-Day Average
45.2%
z-score 1.36
Daily readings — last 10 FINRA sessions
| Date | Off-exchange shares | Short shares | Short ratio |
|---|---|---|---|
| Oct 12, 2026 | 951K | 321K | 33.8% |
| Oct 13, 2026 | 672K | 220K | 32.7% |
| Oct 14, 2026 | 866K | 332K | 38.4% |
| Oct 15, 2026 | 1.6M | 630K | 39.6% |
| Oct 16, 2026 | 1.3M | 608K | 45.3% |
| Oct 19, 2026 | 572K | 352K | 61.5% |
| Oct 20, 2026 | 955K | 543K | 56.8% |
| Oct 21, 2026 | 1.1M | 584K | 52.1% |
| Oct 22, 2026 | 1.3M | 520K | 40.6% |
| Oct 23, 2026 Latest | 761K | 436K | 57.3% |
Source: FINRA daily short sale volume (off-exchange). Ratio = ShortVolume ÷ TotalVolume for the day.
TWST dark pool FAQ
- How much TWST off-exchange volume did FINRA report on Oct 23, 2026?
- FINRA's daily short sale volume file reported 761K TWST shares in publicly disseminated off-exchange trades on Oct 23, 2026; 436K of those shares (57.3%) were marked short or short-exempt.
- Is TWST's dark pool short volume ratio unusual right now?
- As of Oct 23, 2026, TWST's short volume ratio of 57.3% is above TWST's 30-day rolling average of 45.2% (z-score 1.36). 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.