CALC Dark Pool Activity
ATS off-exchange volume intelligence · Week of 2026-07-06
CALC dark pool volume for the week of 2026-07-06: 159.7K shares traded across 21 ATS venues with a total notional value of $151K. Volume is down 21.2% week-over-week. Primary routing venues include , LEVEL ATS, MS POOL (ATS-4).
Dark pool activity in CALC 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 CALC.
Weekly History
| Week | Shares | DP % | WoW |
|---|---|---|---|
| 2026-07-06 | 159.7K | — | -21.2% |
| 2026-06-29 | 202.7K | — | -81.2% |
| 2026-06-22 | 1.1M | — | +5839.5% |
| 2026-06-15 | 18.1K | — | -69.4% |
| 2026-06-08 | 59.2K | — | -26.2% |
| 2026-06-01 | 80.2K | — | +86.4% |
| 2026-05-25 | 43.0K | — | +166.6% |
| 2026-05-18 | 16.1K | — | -31.8% |
| 2026-05-11 | 23.7K | — | -5.0% |
| 2026-05-04 | 24.9K | — | +14.6% |
| 2026-04-27 | 21.8K | — | — |
| 2026-03-23 | 65.8K | — | -40.5% |