Ceased on August 5, 2019
Now: Piper Jaffray Companies PJCX
Tier 1 Securities 
| Year | Q | Total Trades | Total Shares | Avg Trade Size |
|---|---|---|---|---|
| 2019 | 3 | 2,248 | 1,842,804 | 820 |
| 2019 | 2 | 9,549 | 11,515,623 | 1,206 |
| 2019 | 1 | 10,282 | 13,089,365 | 1,273 |
| 2018 | 4 | 8,037 | 11,127,164 | 1,384 |
| 2018 | 3 | 14,362 | 17,984,243 | 1,252 |
| 2018 | 2 | 8,062 | 10,976,326 | 1,361 |
| 2018 | 1 | 14,655 | 15,164,699 | 1,035 |
| 2017 | 4 | 11,249 | 14,989,123 | 1,332 |
| 2017 | 3 | 10,752 | 12,158,540 | 1,131 |
| 2017 | 2 | 9,842 | 12,577,943 | 1,278 |
| 2017 | 1 | 15,039 | 23,081,760 | 1,535 |
| 2016 | 4 | 8,427 | 12,313,347 | 1,461 |
| 2016 | 3 | 8,855 | 9,373,052 | 1,059 |
| 2016 | 2 | 7,197 | 9,511,954 | 1,322 |
| 2016 | 1 | 8,051 | 12,057,427 | 1,498 |
| 2015 | 4 | 8,471 | 12,448,014 | 1,469 |
| 2015 | 3 | 10,422 | 18,698,716 | 1,794 |
| 2015 | 2 | 8,554 | 10,076,646 | 1,178 |
| 2015 | 1 | 11,278 | 22,661,685 | 2,009 |
| 2014 | 4 | 6,672 | 12,191,974 | 1,827 |
| 2014 | 3 | 10,856 | 7,436,967 | 685 |
| 2014 | 2 | 7,065 | 7,391,468 | 1,046 |
Tier 2 Securities
| Year | Q | Total Trades | Total Shares | Avg Trade Size |
|---|---|---|---|---|
| 2019 | 3 | 410 | 417,537 | 1,018 |
| 2019 | 2 | 1,025 | 1,470,236 | 1,434 |
| 2019 | 1 | 1,171 | 1,042,096 | 890 |
| 2018 | 4 | 669 | 821,394 | 1,228 |
| 2018 | 3 | 2,938 | 1,967,650 | 670 |
| 2018 | 2 | 1,122 | 2,203,104 | 1,964 |
| 2018 | 1 | 780 | 1,250,998 | 1,604 |
| 2017 | 4 | 1,503 | 2,760,694 | 1,837 |
| 2017 | 3 | 1,258 | 1,463,578 | 1,163 |
| 2017 | 2 | 889 | 986,002 | 1,109 |
| 2017 | 1 | 2,362 | 2,503,626 | 1,060 |
| 2016 | 4 | 1,352 | 1,112,718 | 823 |
| 2016 | 3 | 2,777 | 3,954,389 | 1,424 |
| 2016 | 2 | 730 | 433,805 | 594 |
| 2016 | 1 | 660 | 586,000 | 888 |
| 2015 | 4 | 787 | 555,098 | 705 |
| 2015 | 3 | 1,404 | 2,485,220 | 1,770 |
| 2015 | 2 | 1,122 | 675,941 | 602 |
| 2015 | 1 | 799 | 875,373 | 1,096 |
| 2014 | 4 | 415 | 295,081 | 711 |
| 2014 | 3 | 1,345 | 582,308 | 433 |
| 2014 | 2 | 857 | 739,251 | 863 |
NMS Securities
| Year | Q | Total Trades | Total Shares | Avg Trade Size |
|---|---|---|---|---|
| 2019 | 3 | 2,658 | 2,260,341 | 850 |
| 2019 | 2 | 10,574 | 12,985,859 | 1,228 |
| 2019 | 1 | 11,453 | 14,131,461 | 1,234 |
| 2018 | 4 | 8,706 | 11,948,558 | 1,372 |
| 2018 | 3 | 17,300 | 19,951,893 | 1,153 |
| 2018 | 2 | 9,184 | 13,179,430 | 1,435 |
| 2018 | 1 | 15,435 | 16,415,697 | 1,064 |
| 2017 | 4 | 12,752 | 17,749,817 | 1,392 |
| 2017 | 3 | 12,010 | 13,622,118 | 1,134 |
| 2017 | 2 | 10,731 | 13,563,945 | 1,264 |
| 2017 | 1 | 17,401 | 25,585,386 | 1,470 |
| 2016 | 4 | 9,779 | 13,426,065 | 1,373 |
| 2016 | 3 | 11,632 | 13,327,441 | 1,146 |
| 2016 | 2 | 7,927 | 9,945,759 | 1,255 |
| 2016 | 1 | 8,711 | 12,643,427 | 1,451 |
| 2015 | 4 | 9,258 | 13,003,112 | 1,405 |
| 2015 | 3 | 11,826 | 21,183,936 | 1,791 |
| 2015 | 2 | 9,676 | 10,752,587 | 1,111 |
| 2015 | 1 | 12,077 | 23,537,058 | 1,949 |
| 2014 | 4 | 7,087 | 12,487,055 | 1,762 |
| 2014 | 3 | 12,201 | 8,019,275 | 657 |
| 2014 | 2 | 7,922 | 8,130,719 | 1,026 |
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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