ORLY Dark Pool Activity
O'Reilly Automotive, Inc.
Data as of Oct 23, 2026 · Source: FINRA daily short sale volume (off-exchange)
On Oct 23, 2026, FINRA reported 1.5M ORLY shares in publicly disseminated off-exchange trades (dark pools and other off-exchange venues). 431K of those shares (29.7%) were marked short or short-exempt, below ORLY's 30-day rolling average of 33.8% (z-score -0.52). Over the last 10 FINRA sessions (Oct 12, 2026 – Oct 23, 2026), ORLY's off-exchange short volume ratio ranged from 18.9% to 43.8% and averaged 29.2%; the latest reading is above that 10-session average.
Off-Exchange Volume
1.5M
Short Volume
431K
Short Volume Ratio
29.7%
30-Day Average
33.8%
z-score -0.52
Daily readings — last 10 FINRA sessions
| Date | Off-exchange shares | Short shares | Short ratio |
|---|---|---|---|
| Oct 12, 2026 | 1.6M | 628K | 39.9% |
| Oct 13, 2026 | 1.2M | 262K | 21.0% |
| Oct 14, 2026 | 1.9M | 598K | 31.4% |
| Oct 15, 2026 | 2.1M | 922K | 43.8% |
| Oct 16, 2026 | 2.0M | 392K | 19.5% |
| Oct 19, 2026 | 1.2M | 238K | 19.6% |
| Oct 20, 2026 | 1.3M | 401K | 31.9% |
| Oct 21, 2026 | 1.5M | 278K | 18.9% |
| Oct 22, 2026 | 1.8M | 667K | 36.4% |
| Oct 23, 2026 Latest | 1.5M | 431K | 29.7% |
Source: FINRA daily short sale volume (off-exchange). Ratio = ShortVolume ÷ TotalVolume for the day.
ORLY dark pool FAQ
- How much ORLY off-exchange volume did FINRA report on Oct 23, 2026?
- FINRA's daily short sale volume file reported 1.5M ORLY shares in publicly disseminated off-exchange trades on Oct 23, 2026; 431K of those shares (29.7%) were marked short or short-exempt.
- Is ORLY's dark pool short volume ratio unusual right now?
- As of Oct 23, 2026, ORLY's short volume ratio of 29.7% is below ORLY's 30-day rolling average of 33.8% (z-score -0.52). 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.