Ceased on October 31, 2018
Tier 1 Securities 
| Year | Q | Total Trades | Total Shares | Avg Trade Size |
|---|---|---|---|---|
| 2018 | 3 | 1 | 22,000 | 22,000 |
| 2018 | 2 | 1 | 10,000 | 10,000 |
| 2017 | 4 | 2 | 19,700 | 9,850 |
| 2017 | 3 | 5 | 103,300 | 20,660 |
| 2017 | 2 | 25 | 581,324 | 23,253 |
| 2017 | 1 | 29 | 548,300 | 18,907 |
| 2016 | 4 | 4 | 130,000 | 32,500 |
| 2016 | 3 | 5 | 73,000 | 14,600 |
| 2016 | 2 | 16 | 298,498 | 18,656 |
| 2016 | 1 | 44 | 978,397 | 22,236 |
| 2015 | 4 | 50 | 2,312,189 | 46,244 |
| 2015 | 3 | 45 | 3,568,824 | 79,307 |
| 2015 | 2 | 242 | 19,263,593 | 79,602 |
| 2015 | 1 | 166 | 14,577,413 | 87,816 |
Tier 2 Securities
| Year | Q | Total Trades | Total Shares | Avg Trade Size |
|---|---|---|---|---|
| 2018 | 1 | 1 | 18,000 | 18,000 |
| 2017 | 4 | 1 | 11,000 | 11,000 |
| 2017 | 3 | 4 | 54,100 | 13,525 |
| 2017 | 2 | 5 | 68,200 | 13,640 |
| 2017 | 1 | 4 | 62,800 | 15,700 |
| 2016 | 3 | 2 | 64,000 | 32,000 |
| 2016 | 2 | 1 | 11,000 | 11,000 |
| 2016 | 1 | 6 | 159,015 | 26,502 |
| 2015 | 4 | 28 | 2,476,200 | 88,436 |
| 2015 | 3 | 38 | 3,789,800 | 99,732 |
| 2015 | 2 | 116 | 7,350,409 | 63,366 |
| 2015 | 1 | 137 | 8,341,813 | 60,889 |
NMS Securities
| Year | Q | Total Trades | Total Shares | Avg Trade Size |
|---|---|---|---|---|
| 2018 | 3 | 1 | 22,000 | 22,000 |
| 2018 | 2 | 1 | 10,000 | 10,000 |
| 2018 | 1 | 1 | 18,000 | 18,000 |
| 2017 | 4 | 3 | 30,700 | 10,233 |
| 2017 | 3 | 9 | 157,400 | 17,489 |
| 2017 | 2 | 30 | 649,524 | 21,651 |
| 2017 | 1 | 33 | 611,100 | 18,518 |
| 2016 | 4 | 4 | 130,000 | 32,500 |
| 2016 | 3 | 7 | 137,000 | 19,571 |
| 2016 | 2 | 17 | 309,498 | 18,206 |
| 2016 | 1 | 50 | 1,137,412 | 22,748 |
| 2015 | 4 | 78 | 4,788,389 | 61,390 |
| 2015 | 3 | 83 | 7,358,624 | 88,658 |
| 2015 | 2 | 358 | 26,614,002 | 74,341 |
| 2015 | 1 | 303 | 22,919,226 | 75,641 |
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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