Dark Pool Activity
Weekly FINRA ATS (Alternative Trading System) data for 1,042 stocks — updated every Friday.
Week of: 2026-06-29
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
1,042
with dark pool data
Total Shares
4.8B
this week
Total Notional
$628.0B
dollar volume
Total Trades
77,810,283
this week
Top 10 by Weekly Notional $
Biggest dollar flow through dark pools this week
| # | Symbol | Company | Price | Mkt Cap | Notional $ | Shares | Trades |
|---|---|---|---|---|---|---|---|
| 1 | MU | Micron Technology, Inc. | $900.20 | $1.0T | $34.7B | 32,662,794 | 1,088,170 |
| 2 | SNDK | Sandisk Corporation | $1278.23 | $189.3B | $16.6B | 8,365,297 | 454,633 |
| 3 | NVDA | NVIDIA Corporation | $196.51 | $4.8T | $15.6B | 79,525,315 | 982,742 |
| 4 | MSFT | Microsoft Corporation | $389.10 | $2.9T | $14.0B | 36,932,922 | 685,280 |
| 5 | AAPL | Apple Inc. | $336.91 | $4.9T | $13.4B | 45,704,282 | 670,520 |
| 6 | AMZN | Amazon.com, Inc. | $231.39 | $2.5T | $12.7B | 52,560,880 | 629,597 |
| 7 | TSLA | Tesla, Inc. | $309.22 | $1.2T | $12.3B | 30,187,869 | 638,516 |
| 8 | META | Meta Platforms, Inc. | $593.87 | $1.5T | $12.0B | 20,175,752 | 449,536 |
| 9 | AMD | Advanced Micro Devices, Inc. | $494.95 | $807.1B | $10.5B | 19,354,778 | 421,845 |
| 10 | AMAT | Applied Materials, Inc. | $516.89 | $410.4B | $9.7B | 14,570,617 | 376,344 |
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 | ALSN | Allison Transmission Holdings, Inc. | $121.91 | $10.1B | +173% | 2,801,623 | 1,026,797 | $329M |
| 2 | OC | Owens Corning | $143.45 | $11.6B | +171% | 3,631,426 | 1,341,556 | $555M |
| 3 | IRDM | Iridium Communications Inc. | $45.96 | $4.9B | +159% | 6,589,134 | 2,545,843 | $355M |
| 4 | MLI | Mueller Industries, Inc. | $64.17 | $14.2B | +135% | 1,887,333 | 802,398 | $140M |
| 5 | DLR | Digital Realty Trust, Inc. | $195.76 | $72.4B | +123% | 7,066,843 | 3,175,303 | $1.3B |
| 6 | MLM | Martin Marietta Materials, Inc. | $572.03 | $34.3B | +115% | 1,532,511 | 714,212 | $890M |
| 7 | FBIN | Fortune Brands Innovations, Inc. | $51.48 | $6.1B | +97% | 7,911,948 | 4,019,825 | $416M |
| 8 | VZ | Verizon Communications Inc. | $47.32 | $197.6B | +94% | 37,110,205 | 19,122,904 | $1.6B |
| 9 | CSL | Carlisle Companies Incorporated | $340.66 | $13.8B | +84% | 980,638 | 532,594 | $359M |
| 10 | CRWD | CrowdStrike Holdings, Inc. | $180.11 | $183.4B | +82% | 4,440,004 | 2,440,352 | $2.1B |
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 | $30.84 | $14.7B | 326 | 2,472,009 | 7,591 | $75M |
| 2 | NU | Nu Holdings Ltd. | $14.53 | $70.4B | 295 | 39,847,989 | 135,081 | $535M |
| 3 | UWMC | UWM Holdings Corporation | $1.84 | $2.8B | 269 | 19,859,763 | 73,729 | $44M |
| 4 | T | AT&T Inc. | $24.41 | $167.3B | 242 | 71,663,500 | 295,966 | $1.5B |
| 5 | TDTT | FlexShares iBoxx 3 Year Target Duration TIPS Index Fund | $23.63 | $2.5B | 230 | 62,216 | 270 | $1M |
| 6 | AES | The AES Corporation | $14.83 | $10.6B | 229 | 10,392,264 | 45,364 | $152M |
| 7 | AUR | Aurora Innovation, Inc. | $6.21 | $12.2B | 213 | 18,388,215 | 86,526 | $128M |
| 8 | CCC | CCC Intelligent Solutions Holdings Inc. | $5.97 | $3.5B | 204 | 15,434,711 | 75,805 | $81M |
| 9 | WBD | Warner Bros. Discovery, Inc. | $25.28 | $63.4B | 201 | 15,471,595 | 76,818 | $415M |
| 10 | BSX | Boston Scientific Corporation | $45.51 | $67.6B | 199 | 38,557,383 | 193,732 | $1.7B |