Ceased on October 1, 2015
Tier 1 Securities 
| Year | Q | Total Trades | Total Shares | Avg Trade Size |
|---|---|---|---|---|
| 2015 | 3 | 602,242 | 131,587,310 | 218 |
| 2015 | 2 | 561,307 | 123,388,998 | 220 |
| 2015 | 1 | 870,272 | 188,366,876 | 216 |
| 2014 | 4 | 1,070,083 | 247,948,945 | 232 |
| 2014 | 3 | 949,557 | 210,934,767 | 222 |
| 2014 | 2 | 485,868 | 101,827,702 | 210 |
Tier 2 Securities
| Year | Q | Total Trades | Total Shares | Avg Trade Size |
|---|---|---|---|---|
| 2015 | 3 | 404,621 | 77,183,210 | 191 |
| 2015 | 2 | 421,565 | 92,381,275 | 219 |
| 2015 | 1 | 606,573 | 131,571,976 | 217 |
| 2014 | 4 | 741,993 | 157,462,352 | 212 |
| 2014 | 3 | 656,475 | 126,215,887 | 192 |
| 2014 | 2 | 397,205 | 72,519,391 | 183 |
NMS Securities
| Year | Q | Total Trades | Total Shares | Avg Trade Size |
|---|---|---|---|---|
| 2015 | 3 | 1,006,863 | 208,770,520 | 207 |
| 2015 | 2 | 982,872 | 215,770,273 | 220 |
| 2015 | 1 | 1,476,845 | 319,938,852 | 217 |
| 2014 | 4 | 1,812,076 | 405,411,297 | 224 |
| 2014 | 3 | 1,606,032 | 337,150,654 | 210 |
| 2014 | 2 | 883,073 | 174,347,093 | 197 |
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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