OPTX Dark Pool Activity
ATS off-exchange volume intelligence · Week of 2026-07-06
OPTX dark pool volume for the week of 2026-07-06: 412.8K shares traded across 26 ATS venues with a total notional value of $3.9M. Volume is up 19.6% week-over-week. Primary routing venues include , MS POOL (ATS-4), UBS ATS.
Dark pool activity in OPTX 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 OPTX.
Weekly History
| Week | Shares | DP % | WoW |
|---|---|---|---|
| 2026-07-06 | 412.8K | — | +19.6% |
| 2026-06-29 | 345.1K | — | +7.1% |
| 2026-06-22 | 322.3K | — | -32.7% |
| 2026-06-15 | 478.7K | — | -8.7% |
| 2026-06-08 | 524.1K | — | -17.0% |
| 2026-06-01 | 631.5K | — | -10.1% |
| 2026-05-25 | 702.3K | — | -19.0% |
| 2026-05-18 | 866.6K | — | +77.5% |
| 2026-05-11 | 488.2K | — | +22.0% |
| 2026-05-04 | 400.2K | — | -29.2% |
| 2026-04-27 | 565.2K | — | — |
| 2026-03-23 | 218.8K | — | +86.2% |