| APAir Products and Chemicals Inc.- Liberal Gardner Facility | Liberal | KS | 1–19 | ◐ LIKELY ACTIVE |
| AIAirsources INC | North Canton | OH | — | ◐ LIKELY ACTIVE |
| ACAirtec Corporation | Highland Park | MI | 20–99 | ◐ LIKELY ACTIVE |
| AIAIW, Inc. | Hyattsville | MD | 100–499 | ◐ LIKELY ACTIVE |
| AIA.j. Iron Work Innovations, CORP. | Brooklyn | NY | — | ◐ LIKELY ACTIVE |
| ASAlamo Structural Steel - Waco | Waco | TX | 100–499 | ◐ LIKELY ACTIVE |
| AIAlchemy Iron Works | Riverside | CA | — | ◐ LIKELY ACTIVE |
| ACA-Lert Construction Services - Fredonia, KS Fab Shop | Fredonia | KS | 20–99 | ◐ LIKELY ACTIVE |
| APAlexandria Precision Machining and Fabrication, L.l.c. | Ohatchee | AL | — | ◐ LIKELY ACTIVE |
| AAAlexis Aerospace Industries LLC | Canton | CT | — | ◐ LIKELY ACTIVE |
| AAAll American Ironworks and Ornamental Metals LLC | Cincinnati | OH | — | ◐ LIKELY ACTIVE |
| ATAllen Trench Safety Corporation | Bellevue | MI | — | ◐ LIKELY ACTIVE |
| AIAllied Imperium Global, INC. | San Antonio | TX | — | ◐ LIKELY ACTIVE |
| AMAll Metal Express | Dothan | AL | 1–19 | ◐ LIKELY ACTIVE |
| AWAlloy Welding Inc | Caledonia | WI | 20–99 | ◐ LIKELY ACTIVE |
| ASAll-tech Systems, Pensacola, INC. | Pensacola | FL | — | ◐ LIKELY ACTIVE |
| ATAll Things Metal | Phoenix | AZ | 100–499 | ◐ LIKELY ACTIVE |
| ASAl Stevens Construction LLC | Overland Park | KS | 20–99 | ◐ LIKELY ACTIVE |
| ACAlum-A-Pole Corporation | Scranton | PA | 20–99 | ◐ LIKELY ACTIVE |
| AIAlumiworks Inc | Randleman | NC | 20–99 | ◐ LIKELY ACTIVE |
| AIAmbiance Interiors Manufacturing CORP. | Miami | FL | — | ◐ LIKELY ACTIVE |
| AUAMECO USA Metal Fabrication Solutions, LLC | Cleveland | OH | 20–99 | ◐ LIKELY ACTIVE |
| AAAmerican Alloy Steel Ogden Utah | Ogden | UT | 20–99 | ◐ LIKELY ACTIVE |
| AAAmerican Alloy Steel Rome New York | Rome New York 13440 | NY | 20–99 | ◐ LIKELY ACTIVE |
| AAAmerican Alloy Steel Tulsa Oklahoma | Tulsa | OK | 20–99 | ◐ LIKELY ACTIVE |
| AAAmerican Alloy Steel TX1 Houston Texas | Houston | TX | 100–499 | ◐ LIKELY ACTIVE |
| AOAmericana Outdoors inc. | Mesaa | AZ | 20–99 | ◐ LIKELY ACTIVE |
| AHAmerican Highway (A Simplex Company) | Fernley | NV | 20–99 | ◐ LIKELY ACTIVE |
| AOAmerican Ornamental Iron CORP | Saltsburg | PA | — | ◐ LIKELY ACTIVE |
| ASAmerican Security Cabinets, LLC | Sauk Rapids | MN | — | ◐ LIKELY ACTIVE |
| ASAmerican Steel & Aluminum Co., Inc. | Grand Prairie | TX | 20–99 | ◐ LIKELY ACTIVE |
| ASAmerican Steel and Aluminum LLC | South Portland | ME | — | ▲ REPORTED CLOSED |
| ASAmerican Steel Fabrications of Idaho, LLC | Blackfoot | ID | — | ◐ LIKELY ACTIVE |
| AMAMF Metal Art II | Annandale | VA | 1–19 | ◐ LIKELY ACTIVE |
| ASAmherst Stainless Fabrication LLC | Amherst | NY | 20–99 | ◐ LIKELY ACTIVE |
| AFAnaconda Foundry Fabrication Co. Inc | Anaconda | MT | 20–99 | ◐ LIKELY ACTIVE |
| AAAnasteel and Supply Co LLC | Ellenwood | GA | 20–99 | ◐ LIKELY ACTIVE |
| ABAnderson Bridges LLC | Colfax | WI | — | ◐ LIKELY ACTIVE |
| AAANDREW an Amphenol Company | Euless | TX | 20–99 | ◐ LIKELY ACTIVE |
| ARAndy Russo Jr. INC | Las Vegas | NV | — | ◐ LIKELY ACTIVE |
| AMAntidote Metal Works INC | Concord | NC | — | ◐ LIKELY ACTIVE |
| AFAntonia Fabricators, Inc | Imperial | MO | 20–99 | ◐ LIKELY ACTIVE |
| AWAnyweld Welding and Fabrication LLC | Manhattan | IL | — | ◐ LIKELY ACTIVE |
| AWAnzelc Welding & Fabricating, INC. | Rockdale | IL | — | ◐ LIKELY ACTIVE |
| AMAop Metal Fabricators, LLC | Crossett | AR | 20–99 | ◐ LIKELY ACTIVE |
| AJApache Junction | Apache Junction | AZ | 1–19 | ◐ LIKELY ACTIVE |
| ADApex Design Technology of Alabama LLC | Decatur | AL | — | ◐ LIKELY ACTIVE |
| AWApex Welding Services, CORP | Boca Raton | FL | — | ◐ LIKELY ACTIVE |
| AFAP Fabrications LLC | Stuttgart | AR | 100–499 | ◐ LIKELY ACTIVE |
| ARA & R Corporation | Idaho Falls | ID | — | ◐ LIKELY ACTIVE |