| Symbol | Name | Country | Exchange |
|---|---|---|---|
| ATDRF | Auto Trader Group Plc | US | OTC |
| ATEX | pdvWireless, Inc. | US | NASDAQ |
| ATHM | Autohome Inc. | US | NYSE |
| ATIG | Atlantis Internet Grp Cp | US | OTC |
| ATNI | Atlantic Tele-Network, Inc. | US | NASDAQ |
| ATOM3 | Atom Empreendimentos e Participações S.A | BR | SA |
| ATP | ATN International Inc | DE | F |
| ATTB34 | AT&T Inc. | BR | SA |
| ATUS | Altice USA, Inc. | US | NYSE |
| ATVDY | Atresmedia Corporacion De Medios Sa ADR | US | OTC |
| ATVI | Activision Blizzard, Inc | US | NASDAQ |
| ATXMF | Advantex Marketing International Inc | US | US |
| ATY | AcuityAds Holdings Inc. | US | NASDAQ |
| AUCM | AuctionCities.com Inc | US | US |
| AUD | Audacy, Inc. | US | NYSE |
| AUDAQ | Audacy Inc | US | US |
| AUTO | Auto Trader Group Plc | UK | LSE |
| AUUDW | Auddia Inc | US | US |
| AVIKF | Advanced Info Service Public Company Limited | US | US |
| AVPI | AVP, Inc | US | OTC |