ZSTK Dark Pool Activity
ATS off-exchange volume intelligence · Week of 2026-07-06
ZSTK dark pool volume for the week of 2026-07-06: 3.4K shares traded across 10 ATS venues with a total notional value of $9K. Volume is up 129.8% week-over-week. Primary routing venues include , CBX, UBS ATS.
Dark pool activity in ZSTK 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 ZSTK.
Weekly History
| Week | Shares | DP % | WoW |
|---|---|---|---|
| 2026-07-06 | 3.4K | — | +129.8% |
| 2026-06-29 | 1.5K | — | -24.4% |
| 2026-06-22 | 1.9K | — | +991.6% |
| 2026-06-15 | 178 | — | -54.4% |
| 2026-06-08 | 390 | — | -90.7% |
| 2026-06-01 | 4.2K | — | +76.9% |
| 2026-05-25 | 2.4K | — | -59.7% |
| 2026-05-18 | 5.9K | — | -69.7% |
| 2026-05-11 | 19.3K | — | +1032.0% |
| 2026-05-04 | 1.7K | — | -25.4% |
| 2026-04-27 | 2.3K | — | — |
| 2026-03-23 | 8.1K | — | +1.8% |