CMPS Dark Pool Activity
Compass Pathways PLC
Data as of Oct 26, 2026 · Source: FINRA daily short sale volume (off-exchange)
On Oct 26, 2026, FINRA reported 729K CMPS shares in publicly disseminated off-exchange trades (dark pools and other off-exchange venues). 258K of those shares (35.3%) were marked short or short-exempt, below CMPS's 30-day rolling average of 44.9% (z-score -1.11). Over the last 10 FINRA sessions (Oct 13, 2026 – Oct 26, 2026), CMPS's off-exchange short volume ratio ranged from 33.4% to 56.0% and averaged 43.3%; the latest reading is below that 10-session average.
Off-Exchange Volume
729K
Short Volume
258K
Short Volume Ratio
35.3%
30-Day Average
44.9%
z-score -1.11
Daily readings — last 10 FINRA sessions
| Date | Off-exchange shares | Short shares | Short ratio |
|---|---|---|---|
| Oct 13, 2026 | 832K | 416K | 49.9% |
| Oct 14, 2026 | 1.0M | 398K | 39.4% |
| Oct 15, 2026 | 758K | 301K | 39.7% |
| Oct 16, 2026 | 1.0M | 580K | 56.0% |
| Oct 19, 2026 | 794K | 421K | 53.0% |
| Oct 20, 2026 | 997K | 403K | 40.4% |
| Oct 21, 2026 | 568K | 190K | 33.4% |
| Oct 22, 2026 | 559K | 271K | 48.4% |
| Oct 23, 2026 | 544K | 206K | 37.9% |
| Oct 26, 2026 Latest | 729K | 258K | 35.3% |
Source: FINRA daily short sale volume (off-exchange). Ratio = ShortVolume ÷ TotalVolume for the day.
CMPS dark pool FAQ
- How much CMPS off-exchange volume did FINRA report on Oct 26, 2026?
- FINRA's daily short sale volume file reported 729K CMPS shares in publicly disseminated off-exchange trades on Oct 26, 2026; 258K of those shares (35.3%) were marked short or short-exempt.
- Is CMPS's dark pool short volume ratio unusual right now?
- As of Oct 26, 2026, CMPS's short volume ratio of 35.3% is below CMPS's 30-day rolling average of 44.9% (z-score -1.11). 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.