XLAB dark pool volume
FINRA weekly ATS volume · per dark pool · XLAB 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, XLAB traded 28.6K shares in dark pools (FINRA-reported alternative trading system volume) across 19 dark pools, the largest was IBKR ATS with 11.9K shares, dark pools carried 23% of its 125.6K FINRA-reported off-exchange shares. FINRA first published this week's file on Oct 19, 2026.
Latest week by dark pool
XLAB dark pool volume, week of Sep 14 to 18, 2026
| Dark pool | Shares | Trades | Share of XLAB dark pool volume |
|---|---|---|---|
| IBKR ATS | 11.9K | 34 | 41.7% |
| MS POOL (ATS-4) | 3.6K | 33 | 12.6% |
| SIGMA X2 | 2.7K | 35 | 9.4% |
| UBS ATS | 1.9K | 111 | 6.6% |
| INSTINCT X | 1.7K | 84 | 5.9% |
| THE BARCLAYS ATS | 1.2K | 12 | 4.2% |
| MS RPOOL (ATS-6) | 1.2K | 6 | 4.0% |
| INTELLIGENT CROSS LLC | 1.0K | 14 | 3.6% |
| CBX | 811 | 5 | 2.8% |
| BOATS | 549 | 20 | 1.9% |
| JPM-X | 488 | 5 | 1.7% |
| ONECHRONOS | 290 | 15 | 1.0% |
Top 12 of 19 reported dark pools, covering 100% of the FINRA dark pool total.
Weekly trend
XLAB dark pool volume history
| FINRA week | Dark pool shares | Non-ATS off-exchange | Dark share of off-exchange |
|---|---|---|---|
| Sep 14, 2026 to 18, 2026 | 28.6K | 96.9K | 23% |
| Sep 7, 2026 to 11, 2026 | 43.2K | 81.3K | 35% |
| Aug 31, 2026 to 4, 2026 | 84.8K | 441.3K | 16% |
| Aug 24, 2026 to 28, 2026 | 34.5K | 3.0M | 1% |
Off-exchange context
Dark pools are one half of off-exchange trading. In the week of Sep 14 to 18, 2026, FINRA reported 125.6K XLAB shares traded off the exchanges in total: 28.6K through dark pools and 96.9K through the non-ATS channel (internalizers and wholesale market makers reporting straight to FINRA). Dark pools carried 23% 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 XLAB 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
XLAB stock page · Live XLAB chart · Dark pool tracker · What is a dark pool (glossary) · Data methodology · All tickers: dark pool hub
FAQ
How much XLAB volume trades in dark pools?
In the week of Sep 14 to 18, 2026, XLAB traded 28.6K shares in dark pools (FINRA-reported alternative trading system volume) across 19 dark pools, the largest was IBKR ATS with 11.9K shares, dark pools carried 23% of its 125.6K FINRA-reported off-exchange shares. FINRA first published this week's file on Oct 19, 2026.
Which dark pools trade XLAB?
In the week of Sep 14 to 18, 2026, IBKR ATS was the largest dark pool for XLAB with 11.9K shares, out of 19 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.