ISRG Dark Pool Activity
Intuitive Surgical, Inc.
Data as of Oct 26, 2026 · Source: FINRA daily short sale volume (off-exchange)
On Oct 26, 2026, FINRA reported 1.3M ISRG shares in publicly disseminated off-exchange trades (dark pools and other off-exchange venues). 347K of those shares (27.6%) were marked short or short-exempt, below ISRG's 30-day rolling average of 55.8% (z-score -3.27). Over the last 10 FINRA sessions (Oct 13, 2026 – Oct 26, 2026), ISRG's off-exchange short volume ratio ranged from 27.6% to 67.8% and averaged 53.7%; the latest reading is below that 10-session average.
Off-Exchange Volume
1.3M
Short Volume
347K
Short Volume Ratio
27.6%
30-Day Average
55.8%
z-score -3.27
Daily readings — last 10 FINRA sessions
| Date | Off-exchange shares | Short shares | Short ratio |
|---|---|---|---|
| Oct 13, 2026 | 701K | 304K | 43.4% |
| Oct 14, 2026 | 731K | 322K | 44.1% |
| Oct 15, 2026 | 860K | 367K | 42.7% |
| Oct 16, 2026 | 969K | 643K | 66.4% |
| Oct 19, 2026 | 1.0M | 664K | 66.0% |
| Oct 20, 2026 | 1.1M | 655K | 61.1% |
| Oct 21, 2026 | 2.1M | 1.3M | 61.6% |
| Oct 22, 2026 | 1.2M | 648K | 55.8% |
| Oct 23, 2026 | 1.4M | 918K | 67.8% |
| Oct 26, 2026 Latest | 1.3M | 347K | 27.6% |
Source: FINRA daily short sale volume (off-exchange). Ratio = ShortVolume ÷ TotalVolume for the day.
ISRG dark pool FAQ
- How much ISRG off-exchange volume did FINRA report on Oct 26, 2026?
- FINRA's daily short sale volume file reported 1.3M ISRG shares in publicly disseminated off-exchange trades on Oct 26, 2026; 347K of those shares (27.6%) were marked short or short-exempt.
- Is ISRG's dark pool short volume ratio unusual right now?
- As of Oct 26, 2026, ISRG's short volume ratio of 27.6% is below ISRG's 30-day rolling average of 55.8% (z-score -3.27). 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.