SPRC dark pool volume
FINRA weekly ATS volume · per dark pool · SPRC off-exchange context · 8-week trend
Weekly FINRA data, published on a delay. Week shown: Sep 14 to 18, 2026. FINRA first published this week's NMS Tier 2 file on Oct 19, 2026, 31 days after the week ended. These are the newest weekly numbers FINRA has published, not a live feed.
In the week of Sep 14 to 18, 2026, SPRC traded 7.3K shares in dark pools (FINRA-reported alternative trading system volume) across 15 dark pools, the largest was SIGMA X2 with 2.4K shares, dark pools carried 35% of its 20.7K FINRA-reported off-exchange shares. FINRA first published this week's file on Oct 19, 2026.
Latest week by dark pool
SPRC dark pool volume, week of Sep 14 to 18, 2026
| Dark pool | Shares | Trades | Share of SPRC dark pool volume |
|---|---|---|---|
| SIGMA X2 | 2.4K | 132 | 32.5% |
| UBS ATS | 1.3K | 13 | 18.3% |
| CITI-ONE ATS | 734 | 8 | 10.0% |
| VIRTU MATCHIT ATS | 700 | 6 | 9.6% |
| INSTINCT X | 600 | 4 | 8.2% |
| LEVEL ATS | 547 | 49 | 7.5% |
| BOATS | 237 | 6 | 3.2% |
| THE BARCLAYS ATS | 211 | 3 | 2.9% |
| INTELLIGENT CROSS LLC | 206 | 5 | 2.8% |
| IBKR ATS | 137 | 3 | 1.9% |
| ONECHRONOS | 100 | 1 | 1.4% |
| POSIT | 100 | 1 | 1.4% |
Top 12 of 15 reported dark pools, covering 100% of the FINRA dark pool total.
Weekly trend
SPRC dark pool volume history
| FINRA week | Dark pool shares | Non-ATS off-exchange | Dark share of off-exchange |
|---|---|---|---|
| Sep 14, 2026 to 18, 2026 | 7.3K | 13.4K | 35% |
| Sep 7, 2026 to 11, 2026 | 4.0K | 12.7K | 24% |
| Aug 31, 2026 to 4, 2026 | 7.1K | 71.1K | 9% |
| Aug 24, 2026 to 28, 2026 | 5.6K | 49.8K | 10% |
| Aug 17, 2026 to 21, 2026 | 11.0K | 160.2K | 6% |
| Aug 10, 2026 to 14, 2026 | 34.0K | 317.7K | 10% |
| Aug 3, 2026 to 7, 2026 | 8.7K | 78.3K | 10% |
Dark pool volume is down 33.2% versus four weeks earlier (Aug 17, 2026).
Off-exchange context
Dark pools are one half of off-exchange trading. In the week of Sep 14 to 18, 2026, FINRA reported 20.7K SPRC shares traded off the exchanges in total: 7.3K through dark pools and 13.4K through the non-ATS channel (internalizers and wholesale market makers reporting straight to FINRA). Dark pools carried 35% of that off-exchange total. This is a share of FINRA-reported off-exchange volume, not of total market volume; the FINRA weekly file does not include exchange volume.
How to read this
Dark pools are private alternative trading systems that match institutional orders without displaying them to the public first. The weekly FINRA file shows how many SPRC shares and trades each dark pool reported, aggregated for the whole week. It carries no prices, no trade sizes, and no direction, so it cannot say whether the volume was buying or selling. Use it to see where hidden liquidity concentrated, and pair it with the live chart for price context.
Related
SPRC stock page · Live SPRC chart · Dark pool tracker · What is a dark pool (glossary) · Data methodology · All tickers: dark pool hub
FAQ
How much SPRC volume trades in dark pools?
In the week of Sep 14 to 18, 2026, SPRC traded 7.3K shares in dark pools (FINRA-reported alternative trading system volume) across 15 dark pools, the largest was SIGMA X2 with 2.4K shares, dark pools carried 35% of its 20.7K FINRA-reported off-exchange shares. FINRA first published this week's file on Oct 19, 2026.
Which dark pools trade SPRC?
In the week of Sep 14 to 18, 2026, SIGMA X2 was the largest dark pool for SPRC with 2.4K shares, out of 15 dark pools that reported the ticker. The table above lists the rest.
Why is this data weeks old?
FINRA publishes dark pool volume weekly, on a delay. The week of Sep 14 to 18, 2026 was first published Oct 19, 2026, and nothing fresher exists until FINRA publishes the next week. We state the lag plainly instead of dressing delayed data up as live.
Does heavy dark pool volume mean big investors are buying?
No. Dark pool volume is hidden liquidity: it says where institutions chose to trade away from the lit exchanges, nothing about direction. FINRA reports share counts and trade counts, not prices, sizes, or sides. A week of heavy dark pool volume can accompany accumulation, distribution, or two-sided market making.