MCS Dark Pool Activity
ATS off-exchange volume intelligence · Week of 2026-07-06
MCS dark pool volume for the week of 2026-07-06: 202.1K shares traded across 23 ATS venues with a total notional value of $4.5M. Volume is up 2.6% week-over-week. Primary routing venues include , MS TRAJECTORY CROSS (ATS-1), UBS ATS.
Dark pool activity in MCS 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 MCS.
Weekly History
| Week | Shares | DP % | WoW |
|---|---|---|---|
| 2026-07-06 | 202.1K | — | +2.6% |
| 2026-06-29 | 197.0K | — | -36.7% |
| 2026-06-22 | 311.3K | — | +29.7% |
| 2026-06-15 | 240.0K | — | +5.9% |
| 2026-06-08 | 226.7K | — | +7.7% |
| 2026-06-01 | 210.6K | — | +140.6% |
| 2026-05-25 | 87.5K | — | -25.4% |
| 2026-05-18 | 117.3K | — | +18.0% |
| 2026-05-11 | 99.4K | — | -39.5% |
| 2026-05-04 | 164.3K | — | +8.8% |
| 2026-04-27 | 151.1K | — | — |
| 2026-03-23 | 93.8K | — | -5.7% |