ZSL Dark Pool Activity
ATS off-exchange volume intelligence · Week of 2026-07-06
ZSL dark pool volume for the week of 2026-07-06: 899.9K shares traded across 21 ATS venues with a total notional value of $27.0M. Volume is up 1.4% week-over-week. Primary routing venues include , INTELLIGENT CROSS LLC, SIGMA X2.
Dark pool activity in ZSL 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 ZSL.
Weekly History
| Week | Shares | DP % | WoW |
|---|---|---|---|
| 2026-07-06 | 899.9K | — | +1.4% |
| 2026-06-29 | 887.1K | — | -51.3% |
| 2026-06-22 | 1.8M | — | +105.8% |
| 2026-06-15 | 885.0K | — | -68.1% |
| 2026-06-08 | 2.8M | — | +68.5% |
| 2026-06-01 | 1.6M | — | -5.3% |
| 2026-05-25 | 1.7M | — | -44.2% |
| 2026-05-18 | 3.1M | — | -44.4% |
| 2026-05-11 | 5.6M | — | +49.0% |
| 2026-05-04 | 3.8M | — | +1.5% |
| 2026-04-27 | 3.7M | — | — |
| 2026-03-23 | 7.7M | 69.5% | -10.9% |