ZI Dark Pool Activity
ATS off-exchange volume intelligence · Week of 2025-05-12
ZI dark pool volume for the week of 2025-05-12: 10.0M shares traded across 26 ATS venues with a total notional value of $101.3M. Volume is up 99.5% week-over-week. Primary routing venues include , UBS ATS, MS TRAJECTORY CROSS (ATS-1).
Dark pool activity in ZI 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 10-week historical volume and complete venue breakdown for ZI.
Weekly History
| Week | Shares | DP % | WoW |
|---|---|---|---|
| 2025-05-12 | 10.0M | — | +99.5% |
| 2025-05-05 | 5.0M | — | +3.8% |
| 2025-04-28 | 4.8M | — | -23.9% |
| 2025-04-21 | 6.4M | — | +16.1% |
| 2025-04-14 | 5.5M | — | -50.5% |
| 2025-04-07 | 11.1M | — | +21.5% |
| 2025-03-31 | 9.1M | — | +53.5% |
| 2025-03-24 | 5.9M | — | +4.6% |
| 2025-03-17 | 5.7M | — | -35.1% |
| 2025-03-10 | 8.7M | — | — |