MKTX Dark Pool Activity
ATS off-exchange volume intelligence · Week of 2026-07-20
MKTX dark pool volume for the week of 2026-07-20: 665.8K shares traded across 22 ATS venues with a total notional value of $75.9M. Volume is up 10.2% week-over-week. Primary routing venues include , SIGMA X2, INSTINCT X.
Dark pool activity in MKTX 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 MKTX.
Weekly History
| Week | Shares | DP % | WoW |
|---|---|---|---|
| 2026-07-20 | 665.8K | — | +10.2% |
| 2026-07-13 | 604.0K | — | -27.6% |
| 2026-07-06 | 833.7K | — | +19.5% |
| 2026-06-29 | 697.8K | — | -34.8% |
| 2026-06-22 | 1.1M | — | +55.8% |
| 2026-06-15 | 687.4K | — | -39.0% |
| 2026-06-08 | 1.1M | — | -11.5% |
| 2026-06-01 | 1.3M | — | +116.1% |
| 2026-05-25 | 589.1K | — | -32.5% |
| 2026-05-18 | 873.2K | — | +17.8% |
| 2026-05-11 | 741.3K | — | -37.0% |
| 2026-05-04 | 1.2M | — | +29.1% |