SISI Dark Pool Activity
ATS off-exchange volume intelligence · Week of 2025-10-06
SISI dark pool volume for the week of 2025-10-06: 3.7K shares traded across 6 ATS venues with a total notional value of $21K. Volume is up 32.4% week-over-week. Primary routing venues include , IBKR ATS, CODA MARKETS, INC..
Dark pool activity in SISI 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 SISI.
Weekly History
| Week | Shares | DP % | WoW |
|---|---|---|---|
| 2025-10-06 | 3.7K | — | +32.4% |
| 2025-09-29 | 2.8K | — | -20.8% |
| 2025-09-22 | 3.5K | — | -85.5% |
| 2025-09-15 | 24.2K | — | +148.5% |
| 2025-09-08 | 9.7K | — | +527.6% |
| 2025-09-01 | 1.5K | — | -88.5% |
| 2025-08-25 | 13.4K | — | -98.7% |
| 2025-08-18 | 1.0M | — | +7109.6% |
| 2025-08-11 | 14.1K | — | -93.0% |
| 2025-08-04 | 201.1K | — | -95.9% |
| 2025-07-28 | 4.9M | — | +1685.8% |
| 2025-07-21 | 273.1K | — | +510.2% |