BIO Dark Pool Activity
ATS off-exchange volume intelligence · Week of 2026-07-20
BIO dark pool volume for the week of 2026-07-20: 573.2K shares traded across 24 ATS venues with a total notional value of $176.4M. Volume is up 37.2% week-over-week. Primary routing venues include , UBS ATS, INTELLIGENT CROSS LLC.
Dark pool activity in BIO 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 BIO.
Weekly History
| Week | Shares | DP % | WoW |
|---|---|---|---|
| 2026-07-20 | 573.2K | — | +37.2% |
| 2026-07-13 | 417.9K | — | +6.0% |
| 2026-07-06 | 394.4K | — | +5.6% |
| 2026-06-29 | 373.7K | — | -54.8% |
| 2026-06-22 | 827.2K | — | +167.9% |
| 2026-06-15 | 308.7K | — | -45.9% |
| 2026-06-08 | 570.5K | — | +4.2% |
| 2026-06-01 | 547.6K | — | -28.7% |
| 2026-05-25 | 767.9K | — | -11.1% |
| 2026-05-18 | 863.4K | — | +33.5% |
| 2026-05-11 | 646.8K | — | +1.4% |
| 2026-05-04 | 637.6K | — | -26.6% |