Dark Pool Activity
Weekly FINRA ATS (Alternative Trading System) data for 1,007 stocks — updated every Friday.
Week of: 2026-04-20
About Dark Pool Data
Dark pools are private exchanges where institutional investors trade large blocks of shares away from public markets. FINRA requires all Alternative Trading Systems (ATS) to report weekly volume data.
- Notional Value: Total dollar value of shares traded in dark pools (shares × price)
- Volume Surge: Week-over-week change in dark pool share volume — spikes may indicate institutional accumulation or distribution
- Avg Trade Size: Shares per trade — larger average sizes suggest institutional block trading rather than retail flow
Data source: FINRA ATS Transparency Data (Tier 1 — NMS stocks), published weekly with a 2-week delay.
Stocks Tracked
1,007
with dark pool data
Total Shares
5.0B
this week
Total Notional
$569.3B
dollar volume
Total Trades
76,531,435
this week
Top 10 by Weekly Notional $
Biggest dollar flow through dark pools this week
| # | Symbol | Company | Price | Mkt Cap | Notional $ | Shares | Trades |
|---|---|---|---|---|---|---|---|
| 1 | NVDA | NVIDIA Corporation | $220.61 | $5.3T | $13.5B | 66,579,100 | 802,620 |
| 2 | TSLA | Tesla, Inc. | $404.11 | $1.5T | $12.9B | 33,589,538 | 815,765 |
| 3 | AMD | Advanced Micro Devices, Inc. | $414.05 | $675.1B | $12.1B | 39,066,876 | 598,748 |
| 4 | MSFT | Microsoft Corporation | $417.42 | $3.1T | $11.8B | 27,897,414 | 584,899 |
| 5 | MU | Micron Technology, Inc. | $698.74 | $788.0B | $10.9B | 23,084,398 | 475,247 |
| 6 | AMZN | Amazon.com, Inc. | $259.34 | $2.8T | $8.7B | 34,240,498 | 514,628 |
| 7 | AVGO | Broadcom Inc. | $411.07 | $1.9T | $8.5B | 20,675,121 | 474,456 |
| 8 | SNDK | Sandisk Corporation | $1383.29 | $204.9B | $7.7B | 8,118,839 | 246,230 |
| 9 | AAPL | Apple Inc. | $298.97 | $4.4T | $7.1B | 26,094,532 | 423,894 |
| 10 | META | Meta Platforms, Inc. | $602.61 | $1.5T | $6.9B | 10,279,435 | 304,514 |
Top 10 by Week-over-Week Volume Surge
Biggest increase in dark pool share volume vs prior week — potential institutional accumulation
| # | Symbol | Company | Price | Mkt Cap | WoW Change | Shares | Prior Wk | Notional $ |
|---|---|---|---|---|---|---|---|---|
| 1 | BLD | TopBuild Corp. | $398.26 | $11.2B | +601% | 3,438,824 | 490,304 | $1.6B |
| 2 | SON | Sonoco Products Company | $46.36 | $4.6B | +224% | 3,941,556 | 1,215,245 | $196M |
| 3 | PEN | Penumbra, Inc. | $326.55 | $12.8B | +200% | 983,501 | 327,350 | $326M |
| 4 | TEL | TE Connectivity Ltd. | $196.07 | $57.2B | +182% | 7,204,154 | 2,556,216 | $1.6B |
| 5 | LMT | Lockheed Martin Corporation | $526.63 | $121.4B | +179% | 3,098,102 | 1,111,741 | $1.7B |
| 6 | PFGC | Performance Food Group Company | $93.89 | $14.7B | +176% | 5,145,920 | 1,867,049 | $468M |
| 7 | WSC | WillScot Holdings Corporation | $22.86 | $4.1B | +174% | 5,785,009 | 2,111,793 | $128M |
| 8 | RLI | RLI Corp. | $52.14 | $4.8B | +164% | 1,596,756 | 605,679 | $90M |
| 9 | QXO | QXO, Inc. | $15.95 | $11.6B | +162% | 35,102,290 | 13,380,709 | $791M |
| 10 | FRMI | Fermi Inc. Common Stock | $5.87 | $3.7B | +162% | 35,696,037 | 13,606,871 | $197M |
Top 10 by Average Trade Size
Largest average shares per trade — indicates institutional block activity
| # | Symbol | Company | Price | Mkt Cap | Avg Trade Size | Shares | Trades | Notional $ |
|---|---|---|---|---|---|---|---|---|
| 1 | PHYS | Sprott Physical Gold Trust | $33.90 | $16.2B | 283 | 1,944,874 | 6,870 | $70M |
| 2 | AAL | American Airlines Group Inc. | $12.06 | $8.0B | 265 | 54,774,456 | 206,712 | $651M |
| 3 | WBD | Warner Bros. Discovery, Inc. | $27.09 | $67.9B | 249 | 16,071,571 | 64,613 | $438M |
| 4 | AUR | Aurora Innovation, Inc. | $6.94 | $13.6B | 249 | 18,752,421 | 75,322 | $96M |
| 5 | F | Ford Motor Company | $13.06 | $51.1B | 226 | 32,908,066 | 145,768 | $416M |
| 6 | OWL | Blue Owl Capital Inc. | $9.43 | $14.7B | 222 | 26,627,526 | 120,016 | $257M |
| 7 | COTY | Coty Inc. | $1.93 | $1.7B | 220 | 10,281,945 | 46,752 | $24M |
| 8 | UWMC | UWM Holdings Corporation | $2.92 | $4.4B | 219 | 9,399,139 | 42,898 | $35M |
| 9 | CCC | CCC Intelligent Solutions Holdings Inc. | $4.61 | $2.7B | 218 | 16,391,779 | 75,027 | $84M |
| 10 | NU | Nu Holdings Ltd. | $12.29 | $59.5B | 218 | 29,203,161 | 134,233 | $432M |