PFIS Dark Pool Activity
ATS off-exchange volume intelligence · Week of 2026-07-06
PFIS dark pool volume for the week of 2026-07-06: 81.2K shares traded across 22 ATS venues with a total notional value of $5.4M. Volume is up 101.0% week-over-week. Primary routing venues include , UBS ATS, SIGMA X2.
Dark pool activity in PFIS 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 PFIS.
Weekly History
| Week | Shares | DP % | WoW |
|---|---|---|---|
| 2026-07-06 | 81.2K | — | +101.0% |
| 2026-06-29 | 40.4K | — | -21.5% |
| 2026-06-22 | 51.5K | — | +21.6% |
| 2026-06-15 | 42.4K | — | -11.2% |
| 2026-06-08 | 47.7K | — | +12.7% |
| 2026-06-01 | 42.3K | — | +62.9% |
| 2026-05-25 | 26.0K | — | -39.9% |
| 2026-05-18 | 43.2K | — | +1.1% |
| 2026-05-11 | 42.8K | — | -7.7% |
| 2026-05-04 | 46.4K | — | -21.8% |
| 2026-04-27 | 59.3K | — | — |
| 2026-03-23 | 29.8K | — | +52.1% |