GH Dark Pool Activity
Guardant Health, Inc.
Data as of Oct 26, 2026 · Source: FINRA daily short sale volume (off-exchange)
On Oct 26, 2026, FINRA reported 955K GH shares in publicly disseminated off-exchange trades (dark pools and other off-exchange venues). 478K of those shares (50.1%) were marked short or short-exempt, above GH's 30-day rolling average of 41.6% (z-score 0.86). Over the last 10 FINRA sessions (Oct 13, 2026 – Oct 26, 2026), GH's off-exchange short volume ratio ranged from 31.5% to 60.2% and averaged 45.1%; the latest reading is above that 10-session average.
Off-Exchange Volume
955K
Short Volume
478K
Short Volume Ratio
50.1%
30-Day Average
41.6%
z-score 0.86
Daily readings — last 10 FINRA sessions
| Date | Off-exchange shares | Short shares | Short ratio |
|---|---|---|---|
| Oct 13, 2026 | 514K | 203K | 39.4% |
| Oct 14, 2026 | 496K | 156K | 31.5% |
| Oct 15, 2026 | 612K | 266K | 43.4% |
| Oct 16, 2026 | 1.1M | 522K | 46.1% |
| Oct 19, 2026 | 956K | 472K | 49.4% |
| Oct 20, 2026 | 633K | 199K | 31.5% |
| Oct 21, 2026 | 906K | 545K | 60.2% |
| Oct 22, 2026 | 883K | 466K | 52.7% |
| Oct 23, 2026 | 706K | 328K | 46.5% |
| Oct 26, 2026 Latest | 955K | 478K | 50.1% |
Source: FINRA daily short sale volume (off-exchange). Ratio = ShortVolume ÷ TotalVolume for the day.
GH dark pool FAQ
- How much GH off-exchange volume did FINRA report on Oct 26, 2026?
- FINRA's daily short sale volume file reported 955K GH shares in publicly disseminated off-exchange trades on Oct 26, 2026; 478K of those shares (50.1%) were marked short or short-exempt.
- Is GH's dark pool short volume ratio unusual right now?
- As of Oct 26, 2026, GH's short volume ratio of 50.1% is above GH's 30-day rolling average of 41.6% (z-score 0.86). 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.