MBB Dark Pool Activity
ATS off-exchange volume intelligence · Week of 2026-07-20
MBB dark pool volume for the week of 2026-07-20: 1.2M shares traded across 23 ATS venues with a total notional value of $109.9M. Volume is up 2.9% week-over-week. Primary routing venues include , UBS ATS, INTELLIGENT CROSS LLC.
Dark pool activity in MBB 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 MBB.
Weekly History
| Week | Shares | DP % | WoW |
|---|---|---|---|
| 2026-07-20 | 1.2M | — | +2.9% |
| 2026-07-13 | 1.1M | — | -12.7% |
| 2026-07-06 | 1.3M | — | +55.5% |
| 2026-06-29 | 845.2K | — | -18.7% |
| 2026-06-22 | 1.0M | — | +29.5% |
| 2026-06-15 | 803.4K | — | -19.3% |
| 2026-06-08 | 995.8K | — | -43.9% |
| 2026-06-01 | 1.8M | — | +31.1% |
| 2026-05-25 | 1.4M | — | +3.5% |
| 2026-05-18 | 1.3M | — | -17.1% |
| 2026-05-11 | 1.6M | — | +52.8% |
| 2026-05-04 | 1.0M | — | +36.9% |