HEI Dark Pool Activity
HEICO Corp
Data as of Oct 23, 2026 · Source: FINRA daily short sale volume (off-exchange)
On Oct 23, 2026, FINRA reported 252K HEI shares in publicly disseminated off-exchange trades (dark pools and other off-exchange venues). 140K of those shares (55.6%) were marked short or short-exempt, below HEI's 30-day rolling average of 62.3% (z-score -0.68). Over the last 10 FINRA sessions (Oct 12, 2026 – Oct 23, 2026), HEI's off-exchange short volume ratio ranged from 47.1% to 74.3% and averaged 62.1%; the latest reading is below that 10-session average.
Off-Exchange Volume
252K
Short Volume
140K
Short Volume Ratio
55.6%
30-Day Average
62.3%
z-score -0.68
Daily readings — last 10 FINRA sessions
| Date | Off-exchange shares | Short shares | Short ratio |
|---|---|---|---|
| Oct 12, 2026 | 144K | 107K | 74.3% |
| Oct 13, 2026 | 185K | 121K | 65.3% |
| Oct 14, 2026 | 188K | 113K | 60.4% |
| Oct 15, 2026 | 196K | 105K | 53.5% |
| Oct 16, 2026 | 206K | 147K | 71.6% |
| Oct 19, 2026 | 127K | 76K | 59.9% |
| Oct 20, 2026 | 100K | 62K | 62.4% |
| Oct 21, 2026 | 248K | 174K | 70.4% |
| Oct 22, 2026 | 226K | 107K | 47.1% |
| Oct 23, 2026 Latest | 252K | 140K | 55.6% |
Source: FINRA daily short sale volume (off-exchange). Ratio = ShortVolume ÷ TotalVolume for the day.
HEI dark pool FAQ
- How much HEI off-exchange volume did FINRA report on Oct 23, 2026?
- FINRA's daily short sale volume file reported 252K HEI shares in publicly disseminated off-exchange trades on Oct 23, 2026; 140K of those shares (55.6%) were marked short or short-exempt.
- Is HEI's dark pool short volume ratio unusual right now?
- As of Oct 23, 2026, HEI's short volume ratio of 55.6% is below HEI's 30-day rolling average of 62.3% (z-score -0.68). 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.