IWB Dark Pool Activity
ATS off-exchange volume intelligence · Week of 2026-07-20
IWB dark pool volume for the week of 2026-07-20: 463.8K shares traded across 23 ATS venues with a total notional value of $188.6M. Volume is up 30.2% week-over-week. Primary routing venues include , INTELLIGENT CROSS LLC, UBS ATS.
Dark pool activity in IWB 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 IWB.
Weekly History
| Week | Shares | DP % | WoW |
|---|---|---|---|
| 2026-07-20 | 463.8K | — | +30.2% |
| 2026-07-13 | 356.2K | — | -19.7% |
| 2026-07-06 | 443.7K | — | -1.3% |
| 2026-06-29 | 449.4K | — | -37.8% |
| 2026-06-22 | 722.4K | — | +0.8% |
| 2026-06-15 | 716.7K | — | -6.7% |
| 2026-06-08 | 768.2K | — | +51.7% |
| 2026-06-01 | 506.5K | — | +54.4% |
| 2026-05-25 | 328.0K | — | -54.5% |
| 2026-05-18 | 720.1K | — | +118.9% |
| 2026-05-11 | 329.0K | — | -40.9% |
| 2026-05-04 | 556.3K | — | +31.3% |