Now: BOFA SECURITIES, INC.
Ownership changed/renamed on May 10, 2019
Tier 1 Securities 
| Year | Q | Total Trades | Total Shares | Avg Trade Size |
|---|---|---|---|---|
| 2020 | 4 | 2,617,139 | 584,167,743 | 223 |
| 2020 | 3 | 3,472,657 | 763,592,997 | 220 |
| 2020 | 2 | 4,699,358 | 1,067,230,775 | 227 |
| 2020 | 1 | 4,501,672 | 1,084,589,664 | 241 |
| 2019 | 4 | 3,501,035 | 826,460,735 | 236 |
| 2019 | 3 | 4,099,522 | 973,081,558 | 237 |
| 2019 | 2 | 3,887,119 | 901,683,683 | 232 |
| 2019 | 1 | 3,765,396 | 868,059,526 | 231 |
| 2018 | 4 | 5,374,209 | 1,201,968,404 | 224 |
| 2018 | 3 | 4,401,743 | 944,302,542 | 215 |
| 2018 | 2 | 4,949,808 | 1,079,523,425 | 218 |
| 2018 | 1 | 6,056,307 | 1,348,881,585 | 223 |
| 2017 | 4 | 6,423,573 | 1,425,402,557 | 222 |
| 2017 | 3 | 6,714,475 | 1,433,685,489 | 214 |
| 2017 | 2 | 7,501,398 | 1,622,044,679 | 216 |
| 2017 | 1 | 7,662,405 | 1,641,906,056 | 214 |
| 2016 | 4 | 9,240,942 | 2,046,493,186 | 221 |
| 2016 | 3 | 8,054,354 | 1,822,000,746 | 226 |
| 2016 | 2 | 9,517,287 | 2,009,136,275 | 211 |
| 2016 | 1 | 11,259,098 | 2,452,877,139 | 218 |
| 2015 | 4 | 12,155,421 | 2,574,100,377 | 212 |
| 2015 | 3 | 12,714,500 | 2,756,688,561 | 217 |
| 2015 | 2 | 9,492,366 | 2,177,200,819 | 229 |
| 2015 | 1 | 10,525,333 | 2,282,553,156 | 217 |
| 2014 | 4 | 11,309,013 | 2,412,557,792 | 213 |
| 2014 | 3 | 11,640,353 | 2,417,669,094 | 208 |
| 2014 | 2 | 7,365,151 | 1,412,087,984 | 192 |
Tier 2 Securities
| Year | Q | Total Trades | Total Shares | Avg Trade Size |
|---|---|---|---|---|
| 2020 | 4 | 2,640,771 | 648,098,453 | 245 |
| 2020 | 3 | 3,134,567 | 785,764,689 | 251 |
| 2020 | 2 | 3,968,478 | 996,593,573 | 251 |
| 2020 | 1 | 3,246,559 | 860,867,659 | 265 |
| 2019 | 4 | 2,742,637 | 700,524,057 | 255 |
| 2019 | 3 | 2,871,224 | 726,599,242 | 253 |
| 2019 | 2 | 2,661,527 | 652,745,107 | 245 |
| 2019 | 1 | 2,518,391 | 585,825,382 | 233 |
| 2018 | 4 | 3,482,253 | 763,434,803 | 219 |
| 2018 | 3 | 3,305,639 | 668,708,357 | 202 |
| 2018 | 2 | 3,774,630 | 754,687,579 | 200 |
| 2018 | 1 | 4,276,611 | 865,383,305 | 202 |
| 2017 | 4 | 4,525,278 | 888,419,146 | 196 |
| 2017 | 3 | 4,684,653 | 880,126,331 | 188 |
| 2017 | 2 | 5,186,643 | 965,649,411 | 186 |
| 2017 | 1 | 5,103,789 | 991,947,035 | 194 |
| 2016 | 4 | 5,527,427 | 1,160,438,531 | 210 |
| 2016 | 3 | 4,514,734 | 965,613,829 | 214 |
| 2016 | 2 | 5,003,642 | 1,042,269,722 | 208 |
| 2016 | 1 | 5,534,195 | 1,178,584,594 | 213 |
| 2015 | 4 | 6,784,812 | 1,335,325,527 | 197 |
| 2015 | 3 | 6,884,344 | 1,434,466,436 | 208 |
| 2015 | 2 | 5,655,261 | 1,215,909,060 | 215 |
| 2015 | 1 | 5,950,233 | 1,226,685,527 | 206 |
| 2014 | 4 | 6,366,949 | 1,307,155,149 | 205 |
| 2014 | 3 | 6,259,649 | 1,213,048,590 | 194 |
| 2014 | 2 | 4,347,858 | 791,514,821 | 182 |
NMS Securities
| Year | Q | Total Trades | Total Shares | Avg Trade Size |
|---|---|---|---|---|
| 2020 | 4 | 5,257,910 | 1,232,266,196 | 234 |
| 2020 | 3 | 6,607,224 | 1,549,357,686 | 234 |
| 2020 | 2 | 8,667,836 | 2,063,824,348 | 238 |
| 2020 | 1 | 7,748,231 | 1,945,457,323 | 251 |
| 2019 | 4 | 6,243,672 | 1,526,984,792 | 245 |
| 2019 | 3 | 6,970,746 | 1,699,680,800 | 244 |
| 2019 | 2 | 6,548,646 | 1,554,428,790 | 237 |
| 2019 | 1 | 6,283,787 | 1,453,884,908 | 231 |
| 2018 | 4 | 8,856,462 | 1,965,403,207 | 222 |
| 2018 | 3 | 7,707,382 | 1,613,010,899 | 209 |
| 2018 | 2 | 8,724,438 | 1,834,211,004 | 210 |
| 2018 | 1 | 10,332,918 | 2,214,264,890 | 214 |
| 2017 | 4 | 10,948,851 | 2,313,821,703 | 211 |
| 2017 | 3 | 11,399,128 | 2,313,811,820 | 203 |
| 2017 | 2 | 12,688,041 | 2,587,694,090 | 204 |
| 2017 | 1 | 12,766,194 | 2,633,853,091 | 206 |
| 2016 | 4 | 14,768,369 | 3,206,931,717 | 217 |
| 2016 | 3 | 12,569,088 | 2,787,614,575 | 222 |
| 2016 | 2 | 14,520,929 | 3,051,405,997 | 210 |
| 2016 | 1 | 16,793,293 | 3,631,461,733 | 216 |
| 2015 | 4 | 18,940,233 | 3,909,425,904 | 206 |
| 2015 | 3 | 19,598,844 | 4,191,154,997 | 214 |
| 2015 | 2 | 15,147,627 | 3,393,109,879 | 224 |
| 2015 | 1 | 16,475,566 | 3,509,238,683 | 213 |
| 2014 | 4 | 17,675,962 | 3,719,712,941 | 210 |
| 2014 | 3 | 17,900,002 | 3,630,717,684 | 203 |
| 2014 | 2 | 11,713,009 | 2,203,602,805 | 188 |
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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