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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

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For informational purposes only. Not investment advice. Data sourced from SEC filings. Privacy Terms