ALTS Dark Pool Activity
ATS off-exchange volume intelligence · Week of 2026-04-27
ALTS dark pool volume for the week of 2026-04-27: 1.6M shares traded across 26 ATS venues with a total notional value of $1.3M. Volume is down 0.0% week-over-week. Primary routing venues include , INTELLIGENT CROSS LLC, JPM-X.
Dark pool activity in ALTS 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 ALTS.
Weekly History
| Week | Shares | DP % | WoW |
|---|---|---|---|
| 2026-04-27 | 1.6M | — | — |
| 2026-03-23 | 722.6K | — | -31.4% |
| 2026-03-16 | 1.1M | — | +25.5% |
| 2026-03-09 | 838.7K | — | — |
| 2026-02-02 | 2.4M | — | +28.2% |
| 2026-01-26 | 1.8M | — | -1.3% |
| 2026-01-19 | 1.9M | — | -42.9% |
| 2026-01-12 | 3.3M | — | +17.9% |
| 2026-01-05 | 2.8M | — | +27.9% |
| 2025-12-29 | 2.2M | — | -11.0% |
| 2025-12-22 | 2.4M | — | -22.1% |
| 2025-12-15 | 3.1M | — | +32.5% |