| ASAmerican Sheet Metal | Houston | TX | — | ◇ UNVERIFIED |
| ASAmerican Sheet Metal | Anaheim | CA | — | ◇ UNVERIFIED |
| ASAmerican Sheet Metal and Welding | Norfolk | VA | — | ◇ UNVERIFIED |
| ASAmerican Stairways & Railings LLC | Reading | OH | — | ◇ UNVERIFIED |
| AWAmerican Warming and Ventilating a Division of Mestek | Bradner | OH | — | ◇ UNVERIFIED |
| ABAmerimax Building Products | Romoland | CA | — | ◇ UNVERIFIED |
| ABAmerimax Building Products | Nappanee | IN | — | ◇ UNVERIFIED |
| AHAmerimax Home Products | Sacramento | CA | — | ◇ UNVERIFIED |
| AMAmeritex Machine and Fab LLC | Willis | TX | — | ◇ UNVERIFIED |
| APAmerson Precision Sheet Metal INC | Mcminnville | OR | — | ◇ UNVERIFIED |
| AAAmf Anaheim LLC | Anaheim | CA | — | ◇ UNVERIFIED |
| ALAms Lv, LLC | Las Vegas | NV | — | ◇ UNVERIFIED |
| AIAndlex INC Dba Southland Fabrication | Fallbrook | CA | — | ◇ UNVERIFIED |
| ASAndrus Sheet Metal, INC. | Richmond | CA | — | ◇ UNVERIFIED |
| AIAnemostat Inc/scranton Plt | Scranton | PA | — | ◇ UNVERIFIED |
| APAnoroc Precision Sheet Metal | Rosewood | CA | — | ◇ UNVERIFIED |
| AMAntarctic Mechanical Services, INC. Dba Ams Mechanical Systems | Evanston | IL | — | ◇ UNVERIFIED |
| AIApex Industries INC | Spokane Valley | WA | — | ◇ UNVERIFIED |
| AOA.p.i. of N.h. | Manchester | NH | — | ◇ UNVERIFIED |
| ASAppleton Supply CO | Appleton | WI | — | ◇ UNVERIFIED |
| ALApplied Laser Technologies LLC | Schofield | WI | — | ◇ UNVERIFIED |
| ALApplied Laser Technologies LLC | Schofield | WI | — | ◇ UNVERIFIED |
| AMApplied Material Technologies INC Dba Fabcor Precision Sheet Metal Fab | Fountain Valley | CA | — | ◇ UNVERIFIED |
| AApw | Anaheim | CA | — | ◇ UNVERIFIED |
| AEApw Erie/erie | Erie | PA | — | ◇ UNVERIFIED |
| AMApw Mayville LLC | Creedmoor | NC | — | ◇ UNVERIFIED |
| APArchers Precision INC | Tigard | OR | — | ◇ UNVERIFIED |
| ASArchibald Sheet Metal, Inc. | Lakeside | CA | — | ◇ UNVERIFIED |
| ACArchitectural Construction Services INC | Minneapolis | MN | — | ◇ UNVERIFIED |
| ADArchitectural Design Concepts | Springfield | MO | — | ◇ UNVERIFIED |
| AFArchitectural Fabrications INC | Auburn | WA | — | ◇ UNVERIFIED |
| AIArchitectural & Industrial Metal Fabrication | Roswell | GA | — | ◇ UNVERIFIED |
| AMArchitectural Metal Works INC | Turner | OR | — | ◇ UNVERIFIED |
| ASArchitectural Sheet Metal & Panels, INC. | Cheyenne | WY | — | ◇ UNVERIFIED |
| ASArchitectural Sheetmetal Products, INC. | Scotia | NY | — | ◇ UNVERIFIED |
| ASArchitectural Sheet Metal Systems, INC. | Bridgeton | MO | — | ◇ UNVERIFIED |
| AMArco Metals, INC | Baltimore | MD | — | ◇ UNVERIFIED |
| ASArjae Sheet Metal CO INC | Happy Valley | OR | — | ◇ UNVERIFIED |
| AMArmadillo Metalworks, INC. | Passaic | NJ | — | ◇ UNVERIFIED |
| AMArmi Manufacturing | Fayetteville | AR | — | ◇ UNVERIFIED |
| APArmorcast Prod. CO | North Hollywood | CA | — | ◇ UNVERIFIED |
| APArmorcast Products Company | North Hollywood | CA | — | ◇ UNVERIFIED |
| APArmstrong Power Systems, LLC | Miami | FL | — | ◇ UNVERIFIED |
| ACArning Companies INC | Cassville | MO | — | ◇ UNVERIFIED |
| AIArning Industries, INC. | Metairie | LA | — | ◇ UNVERIFIED |
| ACArrow Components CORP | Ramsey | MN | — | ◇ UNVERIFIED |
 Arrowhead Products INC | Hopkins | MN | — | ◇ UNVERIFIED |
| AHArrow Heating Company | Tualatin | OR | — | ◇ UNVERIFIED |
| AFArtisan Fabrication LLC | Strafford | MO | — | ◇ UNVERIFIED |
| AMArtis Metals Co., INC. | Boise | ID | — | ◇ UNVERIFIED |
