OPTN Dark Pool Activity
ATS off-exchange volume intelligence · Week of 2025-05-19
OPTN dark pool volume for the week of 2025-05-19: 139.9K shares traded across 15 ATS venues with a total notional value of $1.3M. Volume is up 523.1% week-over-week. Primary routing venues include , JPM-X, INTELLIGENT CROSS LLC.
Dark pool activity in OPTN 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 11-week historical volume and complete venue breakdown for OPTN.
Weekly History
| Week | Shares | DP % | WoW |
|---|---|---|---|
| 2025-05-19 | 139.9K | — | +523.1% |
| 2025-05-12 | 22.4K | — | +722.6% |
| 2025-05-05 | 2.7K | — | -68.9% |
| 2025-04-28 | 8.8K | — | -24.9% |
| 2025-04-21 | 11.7K | — | -64.4% |
| 2025-04-14 | 32.8K | — | -88.7% |
| 2025-04-07 | 289.5K | — | +165.9% |
| 2025-03-31 | 108.9K | — | -57.0% |
| 2025-03-24 | 253.2K | — | -46.5% |
| 2025-03-17 | 473.2K | — | +1101.2% |
| 2025-03-10 | 39.4K | — | — |