PAYX Dark Pool Activity
ATS off-exchange volume intelligence · Week of 2026-07-20
PAYX dark pool volume for the week of 2026-07-20: 4.5M shares traded across 29 ATS venues with a total notional value of $500.8M. Volume is up 19.2% week-over-week. Off-exchange dark pool transactions account for 35.7% of total PAYX market volume — elevated above the typical 10–14% institutional baseline, potentially signaling active accumulation or distribution. Primary routing venues include , INTELLIGENT CROSS LLC, UBS ATS.
Dark pool activity in PAYX 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 PAYX.
Weekly History
| Week | Shares | DP % | WoW |
|---|---|---|---|
| 2026-07-20 | 4.5M | 35.7% | +19.2% |
| 2026-07-13 | 3.7M | — | +7.4% |
| 2026-07-06 | 3.5M | — | -19.1% |
| 2026-06-29 | 4.3M | — | -34.2% |
| 2026-06-22 | 6.5M | — | +97.1% |
| 2026-06-15 | 3.3M | — | -26.1% |
| 2026-06-08 | 4.5M | — | +27.3% |
| 2026-06-01 | 3.5M | — | +20.3% |
| 2026-05-25 | 2.9M | — | -22.1% |
| 2026-05-18 | 3.8M | — | -4.7% |
| 2026-05-11 | 3.9M | — | +22.1% |
| 2026-05-04 | 3.2M | — | -9.7% |