| Abbreviation | Definition |
|---|---|
| AMRC | Ameresco, Inc. (de-listed) |
| AMRC | American Management Resources Corporation |
| AMRC | American Mobile Radio Corporation |
| AMRI | Albany Molecular Research Inc |
| AMRK | AMarketing |
| AMRX | AmeriMex Rail |
| AMS | Adult Movie Shop |
| AMS | Affiliated Medical Services |
| AMS | America Media Systems |
| AMS | American Management Systems, Inc. |
| AMS | American Musical Supply |
| AMS | Arbeidsvoorwaardenregeling Medisch Specialisten |
| AMS | Arnold Mixing Systems |
| AMS | Austria MicroSystems |
| AMS | Austria Mikro Systeme |
| AMS | Automated Machine Systems |
| AMS | Automatic Machine Systems |
| AMSA | Azienda Milanese Servizi Ambientali, S.p.A. |
| AMSAC | Aviation Maintenance Safety Auditing and Consulting |
| AMSB | American SeaBoard Company |