Ceased on September 2, 2016
Tier 1 Securities 
| Year | Q | Total Trades | Total Shares | Avg Trade Size |
|---|---|---|---|---|
| 2016 | 3 | 13,099,978 | 2,736,396,164 | 209 |
| 2016 | 2 | 23,317,387 | 4,988,585,770 | 214 |
| 2016 | 1 | 28,244,595 | 6,131,146,711 | 217 |
| 2015 | 4 | 22,541,364 | 4,874,428,849 | 216 |
| 2015 | 3 | 20,326,585 | 4,554,061,180 | 224 |
| 2015 | 2 | 11,879,253 | 3,005,827,707 | 253 |
| 2015 | 1 | 9,890,214 | 2,635,303,505 | 266 |
| 2014 | 4 | 9,272,758 | 2,468,719,375 | 266 |
| 2014 | 3 | 6,562,036 | 1,946,688,298 | 297 |
| 2014 | 2 | 2,451,774 | 785,246,434 | 320 |
Tier 2 Securities
| Year | Q | Total Trades | Total Shares | Avg Trade Size |
|---|---|---|---|---|
| 2016 | 3 | 6,788,869 | 1,420,511,588 | 209 |
| 2016 | 2 | 11,377,875 | 2,469,427,518 | 217 |
| 2016 | 1 | 13,144,644 | 2,795,024,015 | 213 |
| 2015 | 4 | 11,073,091 | 2,308,813,729 | 209 |
| 2015 | 3 | 9,976,461 | 2,157,741,040 | 216 |
| 2015 | 2 | 6,563,603 | 1,515,984,282 | 231 |
| 2015 | 1 | 5,039,521 | 1,270,854,676 | 252 |
| 2014 | 4 | 5,068,152 | 1,247,504,249 | 246 |
| 2014 | 3 | 3,693,792 | 913,488,023 | 247 |
| 2014 | 2 | 1,508,306 | 405,093,236 | 269 |
NMS Securities
| Year | Q | Total Trades | Total Shares | Avg Trade Size |
|---|---|---|---|---|
| 2016 | 3 | 19,888,847 | 4,156,907,752 | 209 |
| 2016 | 2 | 34,695,262 | 7,458,013,288 | 215 |
| 2016 | 1 | 41,389,239 | 8,926,170,726 | 216 |
| 2015 | 4 | 33,614,455 | 7,183,242,578 | 214 |
| 2015 | 3 | 30,303,046 | 6,711,802,220 | 221 |
| 2015 | 2 | 18,442,856 | 4,521,811,989 | 245 |
| 2015 | 1 | 14,929,735 | 3,906,158,181 | 262 |
| 2014 | 4 | 14,340,910 | 3,716,223,624 | 259 |
| 2014 | 3 | 10,255,828 | 2,860,176,321 | 279 |
| 2014 | 2 | 3,960,080 | 1,190,339,670 | 301 |
Original Source of Information: FINRA ATS Transparency Data Quarterly Statistics
ATS data has been aggregated on a quarterly basis to display total shares, total trades and average trade size per ATS.
Tier 1 comprises all securities in the S&P 500, the Russell 1000 and select Exchange Traded Products (ETPs). Tier 2 comprises all other NMS securities, except for rights and warrants, which are specifically excluded from coverage. The LULD Plan applies during regular trading hours of 9:30 am ET – 4:00 pm ET, excepting opening, reopening, and closing transactions on the primary listing exchanges.
See Limitup-limit-down for a more detailed explanation of these categories.
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