| ATHN |
athenahealth, Inc. |
| ATNX |
Athenex, Inc. |
| ATHX |
Athersys, Inc. |
| ATAC |
Atlantic Acquisition Corp. |
| ATACR |
Atlantic Acquisition Corp. |
| ATACU |
Atlantic Acquisition Corp. |
| AAME |
Atlantic American Corporation |
| ACBI |
Atlantic Capital Bancshares, Inc. |
| ACFC |
Atlantic Coast Financial Corporation |
| ABY |
Atlantica Yield plc |
| ATLC |
Atlanticus Holdings Corporation |
| AAWW |
Atlas Air Worldwide Holdings |
| AFH |
Atlas Financial Holdings, Inc. |
| AFHBL |
Atlas Financial Holdings, Inc. |
| TEAM |
Atlassian Corporation Plc |
| ATNI |
ATN International, Inc. |
| ATOM |
Atomera Incorporated |
| ATOS |
Atossa Genetics Inc. |
| ATRC |
AtriCure, Inc. |
| ATRI |
Atrion Corporation |
