HSII Dark Pool Activity
ATS off-exchange volume intelligence · Week of 2025-12-08
HSII dark pool volume for the week of 2025-12-08: 289.4K shares traded across 22 ATS venues with a total notional value of $17.1M. Volume is down 22.2% week-over-week. Primary routing venues include , INTELLIGENT CROSS LLC, UBS ATS.
Dark pool activity in HSII 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 HSII.
Weekly History
| Week | Shares | DP % | WoW |
|---|---|---|---|
| 2025-12-08 | 289.4K | — | -22.2% |
| 2025-12-01 | 371.9K | — | +42.2% |
| 2025-11-24 | 261.5K | — | -41.3% |
| 2025-11-17 | 445.2K | — | +77.2% |
| 2025-11-10 | 251.2K | — | -41.7% |
| 2025-11-03 | 430.8K | — | — |
| 2025-10-20 | 164.1K | — | -74.9% |
| 2025-10-13 | 653.8K | — | -58.7% |
| 2025-10-06 | 1.6M | — | +1750.6% |
| 2025-09-29 | 85.6K | — | -8.3% |
| 2025-09-22 | 93.3K | — | +15.4% |
| 2025-09-15 | 80.9K | — | -37.8% |