| NYSE | ATI | 85 |
| NYSE | ATIP | 4 |
| NYSE | ATKR | 117 |
| NASDAQ | ATLC | 70 |
| NASDAQ | ATLCP | 7 |
| NASDAQ | ATLN | 1 |
| NASDAQ | ATLO | 168 |
| NYSE | ATMU | 3 |
| NASDAQ | ATNF | 15 |
| NASDAQ | ATNI | 63 |
| NASDAQ | ATNX | 106 |
| NYSE | ATO | 35 |
| NASDAQ | ATOM | 80 |
| NASDAQ | ATOS | 14 |
| NYSE | ATR | 157 |
| NASDAQ | ATRA | 291 |
| NASDAQ | ATRC | 140 |
| NASDAQ | ATRI | 31 |
| NASDAQ | ATRO | 78 |
| NASDAQ | ATRS | 80 |
| NASDAQ | ATSG | 150 |
| NYSE | ATUS | 74 |
| NASDAQ | ATVI | 90 |
| OTCQB | ATXG | 4 |
| NASDAQ | ATXI | 26 |
| NASDAQ | ATXS | 9 |
| NASDAQ | ATYR | 8 |
| NYSE | AU | 16 |
| NASDAQ | AUB | 45 |
| NASDAQ | AUBN | 142 |
| NASDAQ | AUGX | 12 |
| NASDAQ | AUID | 27 |
| NASDAQ | AUPH | 38 |
| NASDAQ | AUR | 43 |
| NASDAQ | AURA | 39 |
| NASDAQ | AUTO | 47 |
| NASDAQ | AUUD | 3 |
| NASDAQ | AUUDW | 2 |
| NASDAQ | AUVI | 6 |
| NYSE | AVA | 146 |
| NASDAQ | AVAH | 44 |
| NASDAQ | AVAV | 172 |
| NYSE | AVB | 121 |
| NYSE | AVBC | 10 |
| NASDAQ | AVBP | 2 |
| NASDAQ | AVCO | 4 |
| NASDAQ | AVCT | 4 |
| NYSE | AVD | 73 |
| NASDAQ | AVDL | 63 |
| NASDAQ | AVDX | 64 |
