HYS Dark Pool Activity
ATS off-exchange volume intelligence · Week of 2026-07-20
HYS dark pool volume for the week of 2026-07-20: 36.1K shares traded across 19 ATS venues with a total notional value of $3.3M. Volume is down 50.1% week-over-week. Primary routing venues include , INTELLIGENT CROSS LLC, UBS ATS.
Dark pool activity in HYS 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 HYS.
Weekly History
| Week | Shares | DP % | WoW |
|---|---|---|---|
| 2026-07-20 | 36.1K | — | -50.1% |
| 2026-07-13 | 72.3K | — | +139.1% |
| 2026-07-06 | 30.2K | — | +9.7% |
| 2026-06-29 | 27.6K | — | -19.8% |
| 2026-06-22 | 34.4K | — | -51.1% |
| 2026-06-15 | 70.2K | — | +206.1% |
| 2026-06-08 | 22.9K | — | -60.1% |
| 2026-06-01 | 57.5K | — | +163.9% |
| 2026-05-25 | 21.8K | — | -53.7% |
| 2026-05-18 | 47.0K | — | +27.6% |
| 2026-05-11 | 36.9K | — | -4.3% |
| 2026-05-04 | 38.5K | — | -39.2% |