ULS Dark Pool Activity
ATS off-exchange volume intelligence · Week of 2026-07-20
ULS dark pool volume for the week of 2026-07-20: 1.0M shares traded across 23 ATS venues with a total notional value of $88.7M. Volume is down 6.9% week-over-week. Primary routing venues include , UBS ATS, INTELLIGENT CROSS LLC.
Dark pool activity in ULS 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 ULS.
Weekly History
| Week | Shares | DP % | WoW |
|---|---|---|---|
| 2026-07-20 | 1.0M | — | -6.9% |
| 2026-07-13 | 1.1M | — | -44.1% |
| 2026-07-06 | 2.0M | — | +77.2% |
| 2026-06-29 | 1.1M | — | -38.6% |
| 2026-06-22 | 1.8M | — | +46.5% |
| 2026-06-15 | 1.2M | — | +38.2% |
| 2026-06-08 | 896.9K | — | -3.4% |
| 2026-06-01 | 928.4K | — | +7.9% |
| 2026-05-25 | 860.3K | — | -19.9% |
| 2026-05-18 | 1.1M | — | +21.8% |
| 2026-05-11 | 882.3K | — | -43.6% |
| 2026-05-04 | 1.6M | — | +99.0% |