PSTG Dark Pool Activity
ATS off-exchange volume intelligence · Week of 2026-03-23
PSTG dark pool volume for the week of 2026-03-23: 2.5M shares traded across 28 ATS venues with a total notional value of $156.2M. Volume is down 18.3% week-over-week. Primary routing venues include , INTELLIGENT CROSS LLC, UBS ATS.
Dark pool activity in PSTG 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 PSTG.
Weekly History
| Week | Shares | DP % | WoW |
|---|---|---|---|
| 2026-03-23 | 2.5M | — | -18.3% |
| 2026-03-16 | 3.0M | — | -24.3% |
| 2026-03-09 | 4.0M | — | -37.4% |
| 2026-03-02 | 6.4M | 33.4% | -22.7% |
| 2026-02-23 | 8.3M | — | +172.8% |
| 2026-02-16 | 3.0M | — | -35.6% |
| 2026-02-09 | 4.7M | 27.0% | -7.8% |
| 2026-02-02 | 5.1M | — | +34.4% |
| 2026-01-26 | 3.8M | — | +29.3% |
| 2026-01-19 | 2.9M | — | -63.9% |
| 2026-01-12 | 8.1M | 28.6% | +65.8% |
| 2026-01-05 | 4.9M | — | +66.5% |