Ceased on June 1, 2016
Tier 1 Securities 
| Year | Q | Total Trades | Total Shares | Avg Trade Size |
|---|---|---|---|---|
| 2016 | 2 | 7,677 | 2,839,600 | 370 |
| 2016 | 1 | 59,256 | 20,137,700 | 340 |
| 2015 | 4 | 170,101 | 58,805,217 | 346 |
| 2015 | 3 | 191,072 | 66,266,810 | 347 |
| 2015 | 2 | 124,677 | 42,807,200 | 343 |
| 2015 | 1 | 155,646 | 57,479,500 | 369 |
| 2014 | 4 | 169,300 | 61,570,700 | 364 |
| 2014 | 3 | 181,237 | 56,341,500 | 311 |
| 2014 | 2 | 109,751 | 38,668,600 | 352 |
Tier 2 Securities
| Year | Q | Total Trades | Total Shares | Avg Trade Size |
|---|---|---|---|---|
| 2016 | 2 | 1,022 | 297,000 | 291 |
| 2016 | 1 | 11,035 | 3,205,000 | 290 |
| 2015 | 4 | 38,067 | 12,217,300 | 321 |
| 2015 | 3 | 51,990 | 15,790,800 | 304 |
| 2015 | 2 | 42,525 | 11,216,200 | 264 |
| 2015 | 1 | 51,967 | 14,194,900 | 273 |
| 2014 | 4 | 73,953 | 19,704,700 | 266 |
| 2014 | 3 | 75,816 | 17,584,900 | 232 |
| 2014 | 2 | 37,275 | 10,177,000 | 273 |
NMS Securities
| Year | Q | Total Trades | Total Shares | Avg Trade Size |
|---|---|---|---|---|
| 2016 | 2 | 8,699 | 3,136,600 | 361 |
| 2016 | 1 | 70,291 | 23,342,700 | 332 |
| 2015 | 4 | 208,168 | 71,022,517 | 341 |
| 2015 | 3 | 243,062 | 82,057,610 | 338 |
| 2015 | 2 | 167,202 | 54,023,400 | 323 |
| 2015 | 1 | 207,613 | 71,674,400 | 345 |
| 2014 | 4 | 243,253 | 81,275,400 | 334 |
| 2014 | 3 | 257,053 | 73,926,400 | 288 |
| 2014 | 2 | 147,026 | 48,845,600 | 332 |
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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