| Abbreviation | Definition |
|---|---|
| AGFX | Anchor Gas and Fuel |
| AGHX | Agrium U.S. Incorporated |
| AGHX | Agrium US |
| AGIX | AGRI Industries |
| AGLF | Atlantic and Gulf Railroad (Knoxville and Holston River Railroad) |
| AGLF | Atlantic and Gulf Railroad Company |
| AGLX | Andrews Petroleum |
| AGLX | Andrews Petroleum Incorporated |
| AGMA | Association of Greater Manchester Authorities |
| AGMU | Agmark Capital Holdings |
| AGMX | Amalgamated Sugar (Terra Nitrogen) |
| AGMX | Terra Nitrogen Limited Partnership |
| AGOU | Airgas USA |
| AGPX | AG Processing |
| AGPX | Ag Processing Incorporated |
| AGR | Advanced Guard Rail |
| AGR | Alabama and Gulf Coast Railway |
| AGR | Alabama and Gulf Coast Railway LLC |
| AGRD | A and G Railroad L.L.C. |
| AGRD | A&G Railroad |