MAT Dark Pool Activity
ATS off-exchange volume intelligence · Week of 2026-07-20
MAT dark pool volume for the week of 2026-07-20: 6.1M shares traded across 26 ATS venues with a total notional value of $86.9M. Volume is down 16.8% week-over-week. Off-exchange dark pool transactions account for 24.4% of total MAT market volume — elevated above the typical 10–14% institutional baseline, potentially signaling active accumulation or distribution. Primary routing venues include , INTELLIGENT CROSS LLC, MS TRAJECTORY CROSS (ATS-1).
Dark pool activity in MAT 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 MAT.
Weekly History
| Week | Shares | DP % | WoW |
|---|---|---|---|
| 2026-07-20 | 6.1M | 24.4% | -16.8% |
| 2026-07-13 | 7.3M | — | +11.3% |
| 2026-07-06 | 6.6M | — | +40.6% |
| 2026-06-29 | 4.7M | — | +19.0% |
| 2026-06-22 | 3.9M | — | -0.1% |
| 2026-06-15 | 3.9M | — | -31.8% |
| 2026-06-08 | 5.8M | — | +12.3% |
| 2026-06-01 | 5.1M | — | +32.9% |
| 2026-05-25 | 3.9M | — | -32.1% |
| 2026-05-18 | 5.7M | — | -4.0% |
| 2026-05-11 | 5.9M | — | +27.6% |
| 2026-05-04 | 4.6M | — | -35.6% |