SPHY Dark Pool Activity
ATS off-exchange volume intelligence · Week of 2026-07-20
SPHY dark pool volume for the week of 2026-07-20: 3.5M shares traded across 21 ATS venues with a total notional value of $81.8M. Volume is up 1.4% week-over-week. Off-exchange dark pool transactions account for 11.1% of total SPHY market volume — within the normal institutional baseline range. Primary routing venues include , INTELLIGENT CROSS LLC, LEVEL ATS.
Dark pool activity in SPHY 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 SPHY.
Weekly History
| Week | Shares | DP % | WoW |
|---|---|---|---|
| 2026-07-20 | 3.5M | 11.1% | +1.4% |
| 2026-07-13 | 3.5M | — | +62.0% |
| 2026-07-06 | 2.1M | — | +55.6% |
| 2026-06-29 | 1.4M | — | -39.9% |
| 2026-06-22 | 2.3M | — | +99.0% |
| 2026-06-15 | 1.2M | — | -47.0% |
| 2026-06-08 | 2.2M | — | -25.9% |
| 2026-06-01 | 2.9M | — | +33.3% |
| 2026-05-25 | 2.2M | — | -4.9% |
| 2026-05-18 | 2.3M | — | +39.2% |
| 2026-05-11 | 1.7M | — | -49.3% |
| 2026-05-04 | 3.3M | — | +62.8% |