GCI Dark Pool Activity
ATS off-exchange volume intelligence · Week of 2025-11-17
GCI dark pool volume for the week of 2025-11-17: 1.3M shares traded across 23 ATS venues with a total notional value of $5.7M. Volume is down 29.0% week-over-week. Primary routing venues include , MS TRAJECTORY CROSS (ATS-1), INTELLIGENT CROSS LLC.
Dark pool activity in GCI 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 GCI.
Weekly History
| Week | Shares | DP % | WoW |
|---|---|---|---|
| 2025-11-17 | 1.3M | — | -29.0% |
| 2025-11-10 | 1.8M | — | -43.7% |
| 2025-11-03 | 3.1M | — | — |
| 2025-10-20 | 820.0K | — | -31.2% |
| 2025-10-13 | 1.2M | — | +2.0% |
| 2025-10-06 | 1.2M | — | +62.3% |
| 2025-09-29 | 719.8K | — | -13.4% |
| 2025-09-22 | 831.4K | — | -12.3% |
| 2025-09-15 | 948.1K | — | +5.2% |
| 2025-09-08 | 900.9K | — | -5.8% |
| 2025-09-01 | 956.5K | — | -25.5% |
| 2025-08-25 | 1.3M | — | -31.1% |