SOPA Dark Pool Activity
ATS off-exchange volume intelligence · Week of 2026-05-18
SOPA dark pool volume for the week of 2026-05-18: 752.1K shares traded across 22 ATS venues with a total notional value of $95K. Volume is up 35.0% week-over-week. Primary routing venues include , IBKR ATS, LEVEL ATS.
Dark pool activity in SOPA 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 SOPA.
Weekly History
| Week | Shares | DP % | WoW |
|---|---|---|---|
| 2026-05-18 | 752.1K | — | +35.0% |
| 2026-05-11 | 557.0K | — | +936.8% |
| 2026-05-04 | 53.7K | — | -42.9% |
| 2026-04-27 | 94.0K | — | — |
| 2026-03-23 | 32.2K | — | -14.8% |
| 2026-03-16 | 37.8K | — | -41.7% |
| 2026-03-09 | 64.8K | — | — |
| 2026-02-02 | 157.4K | — | +6.6% |
| 2026-01-26 | 147.6K | — | -53.8% |
| 2026-01-19 | 319.5K | — | +48.9% |
| 2026-01-12 | 214.5K | — | -69.9% |
| 2026-01-05 | 712.6K | — | -87.2% |