Ceased on January 17, 2022
Tier 1 Securities 
| Year | Q | Total Trades | Total Shares | Avg Trade Size |
|---|---|---|---|---|
| 2020 | 4 | 11,143 | 514,293 | 46 |
| 2020 | 3 | 25,811 | 1,372,280 | 53 |
| 2020 | 2 | 36,207 | 4,246,580 | 117 |
| 2020 | 1 | 19,660 | 2,252,017 | 115 |
| 2019 | 4 | 7,567 | 1,324,704 | 175 |
| 2019 | 3 | 9,226 | 571,803 | 62 |
| 2019 | 2 | 45,884 | 50,188,736 | 1,094 |
| 2019 | 1 | 24,888 | 14,482,171 | 582 |
| 2018 | 4 | 30,248 | 21,157,438 | 699 |
| 2018 | 3 | 13,401 | 775,126 | 58 |
| 2018 | 2 | 15,781 | 1,320,641 | 84 |
| 2018 | 1 | 20,000 | 1,938,954 | 97 |
| 2017 | 4 | 9,456 | 978,099 | 103 |
| 2017 | 3 | 8,692 | 861,930 | 99 |
| 2017 | 2 | 3,064 | 377,506 | 123 |
| 2017 | 1 | 913 | 40,974 | 45 |
| 2016 | 4 | 7,501 | 697,616 | 93 |
| 2016 | 3 | 10,114 | 755,866 | 75 |
| 2016 | 2 | 4,541 | 925,148 | 204 |
| 2016 | 1 | 4,355 | 999,953 | 230 |
| 2015 | 4 | 339 | 10,786 | 32 |
Tier 2 Securities
| Year | Q | Total Trades | Total Shares | Avg Trade Size |
|---|---|---|---|---|
| 2020 | 4 | 231,283 | 50,263,671 | 217 |
| 2020 | 3 | 447,271 | 116,741,290 | 261 |
| 2020 | 2 | 480,976 | 114,703,515 | 238 |
| 2020 | 1 | 267,708 | 67,505,260 | 252 |
| 2019 | 4 | 184,352 | 54,950,171 | 298 |
| 2019 | 3 | 334,584 | 116,095,082 | 347 |
| 2019 | 2 | 687,765 | 381,603,270 | 555 |
| 2019 | 1 | 750,422 | 347,197,847 | 463 |
| 2018 | 4 | 897,928 | 537,191,171 | 598 |
| 2018 | 3 | 567,493 | 386,158,963 | 680 |
| 2018 | 2 | 571,005 | 347,119,709 | 608 |
| 2018 | 1 | 722,620 | 440,726,155 | 610 |
| 2017 | 4 | 800,045 | 385,420,132 | 482 |
| 2017 | 3 | 366,630 | 282,219,154 | 770 |
| 2017 | 2 | 43,798 | 38,511,363 | 879 |
| 2017 | 1 | 6,071 | 2,056,186 | 339 |
| 2016 | 4 | 314,937 | 131,540,927 | 418 |
| 2016 | 3 | 761,285 | 496,746,827 | 653 |
| 2016 | 2 | 136,040 | 165,647,891 | 1,218 |
| 2016 | 1 | 8,984 | 2,018,782 | 225 |
| 2015 | 4 | 76 | 339 | 4 |
NMS Securities
| Year | Q | Total Trades | Total Shares | Avg Trade Size |
|---|---|---|---|---|
| 2020 | 4 | 242,426 | 50,777,964 | 209 |
| 2020 | 3 | 473,082 | 118,113,570 | 250 |
| 2020 | 2 | 517,183 | 118,950,095 | 230 |
| 2020 | 1 | 287,368 | 69,757,277 | 243 |
| 2019 | 4 | 191,919 | 56,274,875 | 293 |
| 2019 | 3 | 343,810 | 116,666,885 | 339 |
| 2019 | 2 | 733,649 | 431,792,006 | 589 |
| 2019 | 1 | 775,310 | 361,680,018 | 466 |
| 2018 | 4 | 928,176 | 558,348,609 | 602 |
| 2018 | 3 | 580,894 | 386,934,089 | 666 |
| 2018 | 2 | 586,786 | 348,440,350 | 594 |
| 2018 | 1 | 742,620 | 442,665,109 | 596 |
| 2017 | 4 | 809,501 | 386,398,231 | 477 |
| 2017 | 3 | 375,322 | 283,081,084 | 754 |
| 2017 | 2 | 46,862 | 38,888,869 | 830 |
| 2017 | 1 | 6,984 | 2,097,160 | 300 |
| 2016 | 4 | 322,438 | 132,238,543 | 410 |
| 2016 | 3 | 771,399 | 497,502,693 | 645 |
| 2016 | 2 | 140,581 | 166,573,039 | 1,185 |
| 2016 | 1 | 13,339 | 3,018,735 | 226 |
| 2015 | 4 | 415 | 11,125 | 27 |
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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