MPX Dark Pool Activity
ATS off-exchange volume intelligence · Week of 2026-05-11
MPX dark pool volume for the week of 2026-05-11: 49.5K shares traded across 23 ATS venues with a total notional value of $407K. Volume is up 75.7% week-over-week. Primary routing venues include , SIGMA X2, CBX.
Dark pool activity in MPX 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 MPX.
Weekly History
| Week | Shares | DP % | WoW |
|---|---|---|---|
| 2026-05-11 | 49.5K | — | +75.7% |
| 2026-05-04 | 28.2K | — | +138.1% |
| 2026-04-27 | 11.8K | — | — |
| 2026-03-23 | 25.9K | — | +133.4% |
| 2026-03-16 | 11.1K | — | -53.4% |
| 2026-03-09 | 23.7K | — | — |
| 2026-02-02 | 45.5K | — | +158.5% |
| 2026-01-26 | 17.6K | — | +36.1% |
| 2026-01-19 | 12.9K | — | -1.8% |
| 2026-01-12 | 13.2K | — | -52.1% |
| 2026-01-05 | 27.5K | — | +65.8% |
| 2025-12-29 | 16.6K | — | -47.0% |