MASK Dark Pool Activity
ATS off-exchange volume intelligence · Week of 2026-07-06
MASK dark pool volume for the week of 2026-07-06: 20.9K shares traded across 17 ATS venues with a total notional value of $39K. Volume is down 20.2% week-over-week. Primary routing venues include , IBKR ATS, LEVEL ATS.
Dark pool activity in MASK 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 MASK.
Weekly History
| Week | Shares | DP % | WoW |
|---|---|---|---|
| 2026-07-06 | 20.9K | — | -20.2% |
| 2026-06-29 | 26.2K | — | -68.2% |
| 2026-06-22 | 82.5K | — | -32.4% |
| 2026-06-15 | 122.1K | — | -84.1% |
| 2026-06-08 | 768.6K | — | -36.5% |
| 2026-06-01 | 1.2M | — | -78.0% |
| 2026-05-25 | 5.5M | 427.9% | +9681.5% |
| 2026-05-18 | 56.2K | — | -59.2% |
| 2026-05-11 | 137.7K | — | -96.3% |
| 2026-05-04 | 3.7M | — | +13766.1% |
| 2026-04-27 | 26.8K | — | — |
| 2026-03-23 | 147.0K | — | +58.9% |