SIZE Dark Pool Activity
ATS off-exchange volume intelligence · Week of 2026-07-06
SIZE dark pool volume for the week of 2026-07-06: 1.4K shares traded across 9 ATS venues with a total notional value of $252K. Volume is up 48.7% week-over-week. Primary routing venues include , SIGMA X2, MS POOL (ATS-4).
Dark pool activity in SIZE 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 SIZE.
Weekly History
| Week | Shares | DP % | WoW |
|---|---|---|---|
| 2026-07-06 | 1.4K | — | +48.7% |
| 2026-06-29 | 945 | — | -78.4% |
| 2026-06-22 | 4.4K | — | +138.1% |
| 2026-06-15 | 1.8K | — | -22.8% |
| 2026-06-08 | 2.4K | — | +4.8% |
| 2026-06-01 | 2.3K | — | +21.5% |
| 2026-05-25 | 1.9K | — | -81.5% |
| 2026-05-18 | 10.1K | — | +207.2% |
| 2026-05-11 | 3.3K | — | +59.2% |
| 2026-05-04 | 2.1K | — | +105.5% |
| 2026-04-27 | 1.0K | — | — |
| 2026-03-23 | 6.2K | — | +300.2% |