MRSN Dark Pool Activity
ATS off-exchange volume intelligence · Week of 2026-01-05
MRSN dark pool volume for the week of 2026-01-05: 43.3K shares traded across 15 ATS venues with a total notional value of $1.3M. Volume is down 82.1% week-over-week. Primary routing venues include , IBKR ATS, UBS ATS.
Dark pool activity in MRSN 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 MRSN.
Weekly History
| Week | Shares | DP % | WoW |
|---|---|---|---|
| 2026-01-05 | 43.3K | — | -82.1% |
| 2025-12-29 | 241.9K | — | +292.3% |
| 2025-12-22 | 61.7K | — | -29.1% |
| 2025-12-15 | 87.0K | — | +29.4% |
| 2025-12-08 | 67.2K | — | -2.9% |
| 2025-12-01 | 69.3K | — | +13.7% |
| 2025-11-24 | 60.9K | — | -43.3% |
| 2025-11-17 | 107.3K | — | -62.0% |
| 2025-11-10 | 282.6K | — | +694.1% |
| 2025-11-03 | 35.6K | — | — |
| 2025-10-20 | 50.0K | — | -32.7% |
| 2025-10-13 | 74.3K | — | -15.3% |