MSOS Dark Pool Activity
ATS off-exchange volume intelligence · Week of 2026-07-20
MSOS dark pool volume for the week of 2026-07-20: 1.1M shares traded across 22 ATS venues with a total notional value of $5.0M. Volume is down 44.4% week-over-week. Primary routing venues include , UBS ATS, THE BARCLAYS ATS.
Dark pool activity in MSOS 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 MSOS.
Weekly History
| Week | Shares | DP % | WoW |
|---|---|---|---|
| 2026-07-20 | 1.1M | — | -44.4% |
| 2026-07-13 | 2.1M | — | -39.1% |
| 2026-07-06 | 3.4M | — | +3.8% |
| 2026-06-29 | 3.3M | — | -0.8% |
| 2026-06-22 | 3.3M | — | +5.8% |
| 2026-06-15 | 3.1M | — | -24.3% |
| 2026-06-08 | 4.1M | — | -11.2% |
| 2026-06-01 | 4.6M | — | +49.6% |
| 2026-05-25 | 3.1M | — | -6.2% |
| 2026-05-18 | 3.3M | — | -16.0% |
| 2026-05-11 | 3.9M | — | -7.4% |
| 2026-05-04 | 4.2M | — | -35.1% |