CLH Dark Pool Activity
ATS off-exchange volume intelligence · Week of 2026-07-20
CLH dark pool volume for the week of 2026-07-20: 542.1K shares traded across 25 ATS venues with a total notional value of $166.4M. Volume is down 28.9% week-over-week. Primary routing venues include , INTELLIGENT CROSS LLC, UBS ATS.
Dark pool activity in CLH 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 CLH.
Weekly History
| Week | Shares | DP % | WoW |
|---|---|---|---|
| 2026-07-20 | 542.1K | — | -28.9% |
| 2026-07-13 | 762.2K | — | +40.5% |
| 2026-07-06 | 542.5K | — | -5.8% |
| 2026-06-29 | 576.0K | — | -25.6% |
| 2026-06-22 | 774.1K | — | +12.7% |
| 2026-06-15 | 686.6K | — | -32.8% |
| 2026-06-08 | 1.0M | — | +44.3% |
| 2026-06-01 | 708.4K | — | -12.4% |
| 2026-05-25 | 808.6K | — | -6.8% |
| 2026-05-18 | 867.3K | — | +15.8% |
| 2026-05-11 | 748.9K | — | -63.7% |
| 2026-05-04 | 2.1M | — | +286.4% |