APH Dark Pool Activity
Amphenol Corporation
Data as of Oct 23, 2026 · Source: FINRA daily short sale volume (off-exchange)
On Oct 23, 2026, FINRA reported 5.1M APH shares in publicly disseminated off-exchange trades (dark pools and other off-exchange venues). 1.4M of those shares (28.3%) were marked short or short-exempt, below APH's 30-day rolling average of 33.4% (z-score -0.53). Over the last 10 FINRA sessions (Oct 12, 2026 – Oct 23, 2026), APH's off-exchange short volume ratio ranged from 15.3% to 45.3% and averaged 26.4%; the latest reading is above that 10-session average.
Off-Exchange Volume
5.1M
Short Volume
1.4M
Short Volume Ratio
28.3%
30-Day Average
33.4%
z-score -0.53
Daily readings — last 10 FINRA sessions
| Date | Off-exchange shares | Short shares | Short ratio |
|---|---|---|---|
| Oct 12, 2026 | 2.9M | 669K | 23.4% |
| Oct 13, 2026 | 2.7M | 739K | 27.5% |
| Oct 14, 2026 | 3.7M | 752K | 20.4% |
| Oct 15, 2026 | 5.5M | 855K | 15.7% |
| Oct 16, 2026 | 4.6M | 706K | 15.3% |
| Oct 19, 2026 | 3.1M | 1.3M | 40.8% |
| Oct 20, 2026 | 3.2M | 1.4M | 45.3% |
| Oct 21, 2026 | 3.5M | 845K | 23.9% |
| Oct 22, 2026 | 7.9M | 1.8M | 23.3% |
| Oct 23, 2026 Latest | 5.1M | 1.4M | 28.3% |
Source: FINRA daily short sale volume (off-exchange). Ratio = ShortVolume ÷ TotalVolume for the day.
APH dark pool FAQ
- How much APH off-exchange volume did FINRA report on Oct 23, 2026?
- FINRA's daily short sale volume file reported 5.1M APH shares in publicly disseminated off-exchange trades on Oct 23, 2026; 1.4M of those shares (28.3%) were marked short or short-exempt.
- Is APH's dark pool short volume ratio unusual right now?
- As of Oct 23, 2026, APH's short volume ratio of 28.3% is below APH's 30-day rolling average of 33.4% (z-score -0.53). 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.