Ceased on February 1, 2017
Tier 1 Securities 
| Year | Q | Total Trades | Total Shares | Avg Trade Size |
|---|---|---|---|---|
| 2016 | 4 | 4,221 | 1,701,675 | 403 |
| 2016 | 3 | 22,144 | 4,595,292 | 208 |
| 2016 | 2 | 35,700 | 6,754,202 | 189 |
| 2016 | 1 | 53,941 | 11,714,860 | 217 |
| 2015 | 4 | 60,500 | 12,445,705 | 206 |
| 2015 | 3 | 58,021 | 11,815,398 | 204 |
| 2015 | 2 | 68,171 | 13,953,875 | 205 |
| 2015 | 1 | 83,634 | 22,609,216 | 270 |
| 2014 | 4 | 78,093 | 20,571,239 | 263 |
| 2014 | 3 | 126,417 | 29,155,577 | 231 |
| 2014 | 2 | 56,221 | 12,299,878 | 219 |
Tier 2 Securities
| Year | Q | Total Trades | Total Shares | Avg Trade Size |
|---|---|---|---|---|
| 2016 | 4 | 3,423 | 677,121 | 198 |
| 2016 | 3 | 17,004 | 2,889,585 | 170 |
| 2016 | 2 | 20,107 | 3,911,847 | 195 |
| 2016 | 1 | 45,786 | 9,242,909 | 202 |
| 2015 | 4 | 53,292 | 10,584,412 | 199 |
| 2015 | 3 | 94,766 | 23,596,639 | 249 |
| 2015 | 2 | 99,056 | 21,192,006 | 214 |
| 2015 | 1 | 134,568 | 30,120,064 | 224 |
| 2014 | 4 | 105,353 | 22,457,840 | 213 |
| 2014 | 3 | 98,669 | 19,662,871 | 199 |
| 2014 | 2 | 75,629 | 15,052,579 | 199 |
NMS Securities
| Year | Q | Total Trades | Total Shares | Avg Trade Size |
|---|---|---|---|---|
| 2016 | 4 | 7,644 | 2,378,796 | 311 |
| 2016 | 3 | 39,148 | 7,484,877 | 191 |
| 2016 | 2 | 55,807 | 10,666,049 | 191 |
| 2016 | 1 | 99,727 | 20,957,769 | 210 |
| 2015 | 4 | 113,792 | 23,030,117 | 202 |
| 2015 | 3 | 152,787 | 35,412,037 | 232 |
| 2015 | 2 | 167,227 | 35,145,881 | 210 |
| 2015 | 1 | 218,202 | 52,729,280 | 242 |
| 2014 | 4 | 183,446 | 43,029,079 | 235 |
| 2014 | 3 | 225,086 | 48,818,448 | 217 |
| 2014 | 2 | 131,850 | 27,352,457 | 207 |
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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