Ceased on July 3, 2017
Tier 1 Securities 
| Year | Q | Total Trades | Total Shares | Avg Trade Size |
|---|---|---|---|---|
| 2017 | 2 | 3,915,446 | 823,378,703 | 210 |
| 2017 | 1 | 6,654,359 | 1,349,530,266 | 203 |
| 2016 | 4 | 7,860,489 | 1,554,473,406 | 198 |
| 2016 | 3 | 7,523,388 | 1,439,341,751 | 191 |
| 2016 | 2 | 9,667,362 | 1,851,623,855 | 192 |
| 2016 | 1 | 11,165,962 | 2,171,686,977 | 194 |
| 2015 | 4 | 9,320,899 | 1,807,182,717 | 194 |
| 2015 | 3 | 11,236,917 | 2,051,917,880 | 183 |
| 2015 | 2 | 11,789,866 | 2,056,133,991 | 174 |
| 2015 | 1 | 11,594,629 | 2,157,836,276 | 186 |
| 2014 | 4 | 12,283,965 | 2,255,651,298 | 184 |
| 2014 | 3 | 12,116,851 | 2,161,445,686 | 178 |
| 2014 | 2 | 6,319,756 | 1,076,961,485 | 170 |
Tier 2 Securities
| Year | Q | Total Trades | Total Shares | Avg Trade Size |
|---|---|---|---|---|
| 2017 | 2 | 2,947,989 | 548,474,628 | 186 |
| 2017 | 1 | 5,158,956 | 925,594,833 | 179 |
| 2016 | 4 | 5,281,900 | 933,475,723 | 177 |
| 2016 | 3 | 4,634,387 | 802,907,916 | 173 |
| 2016 | 2 | 5,409,867 | 920,278,998 | 170 |
| 2016 | 1 | 5,816,678 | 1,013,170,129 | 174 |
| 2015 | 4 | 5,444,894 | 931,421,358 | 171 |
| 2015 | 3 | 6,920,216 | 1,139,227,812 | 165 |
| 2015 | 2 | 7,023,014 | 1,182,601,346 | 168 |
| 2015 | 1 | 6,791,014 | 1,199,292,961 | 177 |
| 2014 | 4 | 7,524,149 | 1,282,727,743 | 170 |
| 2014 | 3 | 6,967,678 | 1,127,174,570 | 162 |
| 2014 | 2 | 4,006,667 | 625,192,907 | 156 |
NMS Securities
| Year | Q | Total Trades | Total Shares | Avg Trade Size |
|---|---|---|---|---|
| 2017 | 2 | 6,863,435 | 1,371,853,331 | 200 |
| 2017 | 1 | 11,813,315 | 2,275,125,099 | 193 |
| 2016 | 4 | 13,142,389 | 2,487,949,129 | 189 |
| 2016 | 3 | 12,157,775 | 2,242,249,667 | 184 |
| 2016 | 2 | 15,077,229 | 2,771,902,853 | 184 |
| 2016 | 1 | 16,982,640 | 3,184,857,106 | 188 |
| 2015 | 4 | 14,765,793 | 2,738,604,075 | 185 |
| 2015 | 3 | 18,157,133 | 3,191,145,692 | 176 |
| 2015 | 2 | 18,812,880 | 3,238,735,337 | 172 |
| 2015 | 1 | 18,385,643 | 3,357,129,237 | 183 |
| 2014 | 4 | 19,808,114 | 3,538,379,041 | 179 |
| 2014 | 3 | 19,084,529 | 3,288,620,256 | 172 |
| 2014 | 2 | 10,326,423 | 1,702,154,392 | 165 |
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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