ISTB Dark Pool Activity
ATS off-exchange volume intelligence · Week of 2026-07-20
ISTB dark pool volume for the week of 2026-07-20: 109.9K shares traded across 16 ATS venues with a total notional value of $5.3M. Volume is up 18.9% week-over-week. Primary routing venues include , UBS ATS, INTELLIGENT CROSS LLC.
Dark pool activity in ISTB 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 ISTB.
Weekly History
| Week | Shares | DP % | WoW |
|---|---|---|---|
| 2026-07-20 | 109.9K | — | +18.9% |
| 2026-07-13 | 92.4K | — | -47.1% |
| 2026-07-06 | 174.8K | — | +32.9% |
| 2026-06-29 | 131.5K | — | +10.5% |
| 2026-06-22 | 119.0K | — | -31.7% |
| 2026-06-15 | 174.1K | — | +19.2% |
| 2026-06-08 | 146.1K | — | -48.4% |
| 2026-06-01 | 283.0K | — | +91.5% |
| 2026-05-25 | 147.8K | — | +40.1% |
| 2026-05-18 | 105.5K | — | -10.3% |
| 2026-05-11 | 117.6K | — | +19.8% |
| 2026-05-04 | 98.1K | — | -23.3% |