PHX Dark Pool Activity
ATS off-exchange volume intelligence · Week of 2025-06-16
PHX dark pool volume for the week of 2025-06-16: 960.4K shares traded across 21 ATS venues with a total notional value of $4.2M. Volume is up 91.7% week-over-week. Primary routing venues include , MS POOL (ATS-4), INSTINCT X.
Dark pool activity in PHX reflects institutional order flow executing on Alternative Trading Systems (ATS) registered with the SEC — private venues where large-block trades are matched away from public exchanges to minimize price impact. StonkWhisper ingests FINRA-published ATS volume data to track these off-exchange flows. Sustained elevation in dark pool percentage — particularly when concentrated at specific venues — can indicate institutional accumulation or distribution ahead of significant price moves. The interactive charts below show 12-week historical volume and complete venue breakdown for PHX.
Weekly History
| Week | Shares | DP % | WoW |
|---|---|---|---|
| 2025-06-16 | 960.4K | — | +91.7% |
| 2025-06-09 | 501.1K | — | -47.4% |
| 2025-06-02 | 952.9K | — | -19.4% |
| 2025-05-26 | 1.2M | — | -6.1% |
| 2025-05-19 | 1.3M | — | -12.8% |
| 2025-05-12 | 1.4M | — | +60.8% |
| 2025-05-05 | 897.9K | — | +544.3% |
| 2025-04-28 | 139.4K | — | +65.0% |
| 2025-04-21 | 84.4K | — | +17.1% |
| 2025-04-14 | 72.1K | — | -19.2% |
| 2025-04-07 | 89.3K | — | +16.4% |
| 2025-03-31 | 76.7K | — | +134.8% |