STEM Dark Pool Activity
ATS off-exchange volume intelligence · Week of 2026-07-06
STEM dark pool volume for the week of 2026-07-06: 50.6K shares traded across 22 ATS venues with a total notional value of $366K. Volume is down 13.5% week-over-week. Primary routing venues include , MS POOL (ATS-4), INTELLIGENT CROSS LLC.
Dark pool activity in STEM 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 STEM.
Weekly History
| Week | Shares | DP % | WoW |
|---|---|---|---|
| 2026-07-06 | 50.6K | — | -13.5% |
| 2026-06-29 | 58.5K | — | -12.6% |
| 2026-06-22 | 67.0K | — | +19.7% |
| 2026-06-15 | 56.0K | — | -51.0% |
| 2026-06-08 | 114.3K | — | -55.7% |
| 2026-06-01 | 257.9K | — | +2.2% |
| 2026-05-25 | 252.4K | — | +55.6% |
| 2026-05-18 | 162.2K | — | -7.8% |
| 2026-05-11 | 176.0K | — | +22.2% |
| 2026-05-04 | 143.9K | — | +76.2% |
| 2026-04-27 | 81.7K | — | — |
| 2026-03-23 | 95.0K | — | +16.8% |