STM Dark Pool Activity
ATS off-exchange volume intelligence · Week of 2026-07-06
STM dark pool volume for the week of 2026-07-06: 7.5M shares traded across 28 ATS venues with a total notional value of $520.6M. Volume is down 8.5% week-over-week. Primary routing venues include , UBS ATS, INTELLIGENT CROSS LLC.
Dark pool activity in STM 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 STM.
Weekly History
| Week | Shares | DP % | WoW |
|---|---|---|---|
| 2026-07-06 | 7.5M | — | -8.5% |
| 2026-06-29 | 8.2M | — | +11.8% |
| 2026-06-22 | 7.3M | — | +14.6% |
| 2026-06-15 | 6.4M | — | -40.8% |
| 2026-06-08 | 10.8M | 16.1% | -9.7% |
| 2026-06-01 | 11.9M | 22.4% | +38.8% |
| 2026-05-25 | 8.6M | 16.2% | +6.0% |
| 2026-05-18 | 8.1M | 15.3% | -23.9% |
| 2026-05-11 | 10.6M | 20.0% | +22.2% |
| 2026-05-04 | 8.7M | 16.4% | -22.3% |
| 2026-04-27 | 11.2M | 21.1% | — |
| 2026-03-23 | 7.7M | 13.5% | +5.6% |