PRTC Dark Pool Activity
ATS off-exchange volume intelligence · Week of 2026-05-18
PRTC dark pool volume for the week of 2026-05-18: 740 shares traded across 9 ATS venues with a total notional value of $13K. Volume is down 93.8% week-over-week. Primary routing venues include , CBX, UBS ATS.
Dark pool activity in PRTC 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 PRTC.
Weekly History
| Week | Shares | DP % | WoW |
|---|---|---|---|
| 2026-05-18 | 740 | — | -93.8% |
| 2026-05-11 | 12.0K | — | +3.6% |
| 2026-05-04 | 11.6K | — | +82.8% |
| 2026-04-27 | 6.4K | — | — |
| 2026-03-23 | 789 | — | +84.8% |
| 2026-03-16 | 427 | — | -78.4% |
| 2026-03-09 | 2.0K | — | — |
| 2026-02-02 | 858 | — | +77.6% |
| 2026-01-26 | 483 | — | -91.0% |
| 2026-01-19 | 5.4K | — | -42.7% |
| 2026-01-12 | 9.4K | — | +62606.7% |
| 2026-01-05 | 15 | — | +150.0% |