BLDR Dark Pool Activity
ATS off-exchange volume intelligence · Week of 2026-07-20
BLDR dark pool volume for the week of 2026-07-20: 3.6M shares traded across 26 ATS venues with a total notional value of $259.1M. Volume is up 29.6% week-over-week. Off-exchange dark pool transactions account for 36.2% of total BLDR market volume — elevated above the typical 10–14% institutional baseline, potentially signaling active accumulation or distribution. Primary routing venues include , INTELLIGENT CROSS LLC, UBS ATS.
Dark pool activity in BLDR 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 BLDR.
Weekly History
| Week | Shares | DP % | WoW |
|---|---|---|---|
| 2026-07-20 | 3.6M | 36.2% | +29.6% |
| 2026-07-13 | 2.8M | — | -20.4% |
| 2026-07-06 | 3.5M | — | +44.5% |
| 2026-06-29 | 2.4M | — | -33.8% |
| 2026-06-22 | 3.7M | — | +35.5% |
| 2026-06-15 | 2.7M | — | -28.1% |
| 2026-06-08 | 3.8M | — | +10.6% |
| 2026-06-01 | 3.4M | — | +21.6% |
| 2026-05-25 | 2.8M | — | -36.1% |
| 2026-05-18 | 4.4M | — | +19.4% |
| 2026-05-11 | 3.7M | — | -32.9% |
| 2026-05-04 | 5.5M | — | -6.2% |