ATRA Dark Pool Activity
ATS off-exchange volume intelligence · Week of 2026-07-06
ATRA dark pool volume for the week of 2026-07-06: 65.1K shares traded across 20 ATS venues with a total notional value of $658K. Volume is up 32.9% week-over-week. Primary routing venues include , MS POOL (ATS-4), IBKR ATS.
Dark pool activity in ATRA 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 ATRA.
Weekly History
| Week | Shares | DP % | WoW |
|---|---|---|---|
| 2026-07-06 | 65.1K | — | +32.9% |
| 2026-06-29 | 49.0K | — | -28.1% |
| 2026-06-22 | 68.1K | — | -5.7% |
| 2026-06-15 | 72.3K | — | +2.8% |
| 2026-06-08 | 70.3K | — | +5.4% |
| 2026-06-01 | 66.7K | — | -30.4% |
| 2026-05-25 | 95.9K | — | -40.9% |
| 2026-05-18 | 162.1K | — | -60.9% |
| 2026-05-11 | 414.3K | — | -87.1% |
| 2026-05-04 | 3.2M | — | +10812.4% |
| 2026-04-27 | 29.4K | — | — |
| 2026-03-23 | 49.6K | — | -51.7% |