Ceased on August 1, 2023
Tier 1 Securities 
| Year | Q | Total Trades | Total Shares | Avg Trade Size |
|---|---|---|---|---|
| 2020 | 4 | 13,454,984 | 1,923,469,575 | 143 |
| 2020 | 3 | 20,952,136 | 2,866,081,279 | 137 |
| 2020 | 2 | 28,403,927 | 4,538,182,597 | 160 |
| 2020 | 1 | 33,208,762 | 5,442,963,747 | 164 |
| 2019 | 4 | 16,129,129 | 2,600,188,682 | 161 |
| 2019 | 3 | 21,266,197 | 3,415,099,626 | 161 |
| 2019 | 2 | 19,083,234 | 3,107,334,836 | 163 |
| 2019 | 1 | 18,009,210 | 3,100,783,152 | 172 |
| 2018 | 4 | 23,682,625 | 3,978,580,684 | 168 |
| 2018 | 3 | 18,883,707 | 3,055,195,356 | 162 |
| 2018 | 2 | 21,753,905 | 3,390,704,014 | 156 |
| 2018 | 1 | 23,488,063 | 3,882,398,947 | 165 |
| 2017 | 4 | 21,590,440 | 3,754,994,513 | 174 |
| 2017 | 3 | 20,526,263 | 3,682,440,649 | 179 |
| 2017 | 2 | 25,078,908 | 4,680,960,308 | 187 |
| 2017 | 1 | 24,508,731 | 4,447,809,101 | 181 |
| 2016 | 4 | 23,531,703 | 4,388,066,539 | 186 |
| 2016 | 3 | 22,738,077 | 4,269,892,319 | 188 |
| 2016 | 2 | 26,945,679 | 4,991,824,261 | 185 |
| 2016 | 1 | 33,339,407 | 6,343,434,705 | 190 |
| 2015 | 4 | 32,105,320 | 6,019,631,374 | 187 |
| 2015 | 3 | 31,255,755 | 5,693,068,151 | 182 |
| 2015 | 2 | 26,508,692 | 4,853,476,177 | 183 |
| 2015 | 1 | 27,110,370 | 4,943,617,811 | 182 |
| 2014 | 4 | 29,381,898 | 5,313,221,948 | 181 |
| 2014 | 3 | 25,051,282 | 4,590,100,173 | 183 |
| 2014 | 2 | 14,181,171 | 2,476,262,091 | 175 |
Tier 2 Securities
| Year | Q | Total Trades | Total Shares | Avg Trade Size |
|---|---|---|---|---|
| 2020 | 4 | 12,162,118 | 2,155,954,845 | 177 |
| 2020 | 3 | 15,329,768 | 2,601,788,808 | 170 |
| 2020 | 2 | 19,350,544 | 3,787,971,883 | 196 |
| 2020 | 1 | 18,694,956 | 3,689,379,288 | 197 |
| 2019 | 4 | 11,177,162 | 2,039,167,578 | 182 |
| 2019 | 3 | 13,542,225 | 2,258,275,833 | 167 |
| 2019 | 2 | 11,634,249 | 1,965,787,238 | 169 |
| 2019 | 1 | 10,661,329 | 1,827,641,881 | 171 |
| 2018 | 4 | 13,194,155 | 2,226,842,891 | 169 |
| 2018 | 3 | 11,664,950 | 1,927,948,367 | 165 |
| 2018 | 2 | 13,335,637 | 2,091,522,211 | 157 |
| 2018 | 1 | 14,153,371 | 2,248,831,277 | 159 |
| 2017 | 4 | 14,404,284 | 2,393,066,742 | 166 |
| 2017 | 3 | 13,675,519 | 2,306,027,349 | 169 |
| 2017 | 2 | 15,253,788 | 2,659,150,899 | 174 |
| 2017 | 1 | 13,986,190 | 2,521,092,415 | 180 |
| 2016 | 4 | 11,721,483 | 2,175,109,420 | 186 |
| 2016 | 3 | 11,842,064 | 2,141,068,334 | 181 |
| 2016 | 2 | 12,938,288 | 2,326,356,390 | 180 |
| 2016 | 1 | 14,544,794 | 2,724,802,919 | 187 |
| 2015 | 4 | 15,728,813 | 2,780,983,240 | 177 |
| 2015 | 3 | 16,659,715 | 2,957,924,654 | 178 |
| 2015 | 2 | 15,570,439 | 2,766,345,136 | 178 |
| 2015 | 1 | 15,109,718 | 2,691,972,359 | 178 |
| 2014 | 4 | 16,026,507 | 2,791,227,543 | 174 |
| 2014 | 3 | 15,378,038 | 2,602,725,123 | 169 |
| 2014 | 2 | 8,991,997 | 1,473,880,041 | 164 |
NMS Securities
| Year | Q | Total Trades | Total Shares | Avg Trade Size |
|---|---|---|---|---|
| 2020 | 4 | 25,617,102 | 4,079,424,420 | 159 |
| 2020 | 3 | 36,281,904 | 5,467,870,087 | 151 |
| 2020 | 2 | 47,754,471 | 8,326,154,480 | 174 |
| 2020 | 1 | 51,903,718 | 9,132,343,035 | 176 |
| 2019 | 4 | 27,306,291 | 4,639,356,260 | 170 |
| 2019 | 3 | 34,808,422 | 5,673,375,459 | 163 |
| 2019 | 2 | 30,717,483 | 5,073,122,074 | 165 |
| 2019 | 1 | 28,670,539 | 4,928,425,033 | 172 |
| 2018 | 4 | 36,876,780 | 6,205,423,575 | 168 |
| 2018 | 3 | 30,548,657 | 4,983,143,723 | 163 |
| 2018 | 2 | 35,089,542 | 5,482,226,225 | 156 |
| 2018 | 1 | 37,641,434 | 6,131,230,224 | 163 |
| 2017 | 4 | 35,994,724 | 6,148,061,255 | 171 |
| 2017 | 3 | 34,201,782 | 5,988,467,998 | 175 |
| 2017 | 2 | 40,332,696 | 7,340,111,207 | 182 |
| 2017 | 1 | 38,494,921 | 6,968,901,516 | 181 |
| 2016 | 4 | 35,253,186 | 6,563,175,959 | 186 |
| 2016 | 3 | 34,580,141 | 6,410,960,653 | 185 |
| 2016 | 2 | 39,883,967 | 7,318,180,651 | 183 |
| 2016 | 1 | 47,884,201 | 9,068,237,624 | 189 |
| 2015 | 4 | 47,834,133 | 8,800,614,614 | 184 |
| 2015 | 3 | 47,915,470 | 8,650,992,805 | 181 |
| 2015 | 2 | 42,079,131 | 7,619,821,313 | 181 |
| 2015 | 1 | 42,220,088 | 7,635,590,170 | 181 |
| 2014 | 4 | 45,408,405 | 8,104,449,491 | 178 |
| 2014 | 3 | 40,429,320 | 7,192,825,296 | 178 |
| 2014 | 2 | 23,173,168 | 3,950,142,132 | 170 |
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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