PTC Dark Pool Activity
ATS off-exchange volume intelligence · Week of 2026-07-20
PTC dark pool volume for the week of 2026-07-20: 2.8M shares traded across 27 ATS venues with a total notional value of $325.9M. Volume is up 78.2% week-over-week. Primary routing venues include , SIGMA X2, UBS ATS.
Dark pool activity in PTC 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 PTC.
Weekly History
| Week | Shares | DP % | WoW |
|---|---|---|---|
| 2026-07-20 | 2.8M | — | +78.2% |
| 2026-07-13 | 1.6M | — | -13.9% |
| 2026-07-06 | 1.8M | — | -15.3% |
| 2026-06-29 | 2.1M | — | -24.1% |
| 2026-06-22 | 2.8M | — | +14.7% |
| 2026-06-15 | 2.5M | — | -29.8% |
| 2026-06-08 | 3.5M | — | +28.1% |
| 2026-06-01 | 2.7M | — | +48.6% |
| 2026-05-25 | 1.8M | — | +1.6% |
| 2026-05-18 | 1.8M | — | +11.8% |
| 2026-05-11 | 1.6M | — | -54.5% |
| 2026-05-04 | 3.6M | — | +110.7% |