| CMChicago Metal Rolled Products Company | Chicago | IL | 20–99 | ● ACTIVE |
| CMChucking Machine Products, INC. | Franklin Park | IL | 20–99 | ● ACTIVE |
Cji Process Systems, INC. | Santa Fe Springs | CA | — | ● ACTIVE |
Clark Metal Products CO | Blairsville | PA | 20–99 | ● ACTIVE |
Classic Recreation Systems, INC | Dewey | AZ | 20–99 | ● ACTIVE |
Clint Precision Manufacturing, INC | San Diego | CA | — | ● ACTIVE |
Cloacina, LLC | Arroyo Grande | CA | 20–99 | ● ACTIVE |
Clyde Machines INC | Glenwood | MN | — | ● ACTIVE |
Cnc Machine and Fabrication, INC. | Hyde Park | UT | — | ● ACTIVE |
Coalfield Services INC | Wytheville | VA | — | ● ACTIVE |
Coast Machinery LLC | Baton Rouge | LA | — | ● ACTIVE |
Cogitic Corporation | Colorado Springs | CO | 20–99 | ● ACTIVE |
Coherent INC | Santa Clara | CA | — | ● ACTIVE |
Colgan-wilson Metals, LLC | Beaumont | TX | 100–499 | ● ACTIVE |
| CFCompucraft Fabricators INC | Montgomeryville | PA | — | ● ACTIVE |
Computer Assisted Manufacturing Technology LLC | Irvine | CA | — | ● ACTIVE |
Computer Metal Products Corporation | Simi Valley | CA | — | ● ACTIVE |
Concept Industries INC | Elk Grove Village | IL | 1–19 | ● ACTIVE |
Conductix INC | Omaha | NE | — | ● ACTIVE |
Consolidated Steel, INC. | Cedar Bluff | VA | 100–499 | ● ACTIVE |
Construction Forms, INC. | Port Washington | WI | — | ● ACTIVE |
Container Products Company, LLC | Currie | NC | 20–99 | ● ACTIVE |
Container Technologies Industries, LLC | Helenwood | TN | — | ● ACTIVE |
Contine CORP | Erie | PA | 20–99 | ● ACTIVE |
Continental Engineering and Manufacturing, INC | Chaska | MN | — | ● ACTIVE |
| CCControls Corporation of America | Virginia Beach | VA | — | ● ACTIVE |
Cornerstone Fabricating & Construction INC | Hemlock | MI | — | ● ACTIVE |
Craftco Metals Services Incorporated | Sheridan | WY | — | ● ACTIVE |
Craft Machine Works, INC. | Hampton | VA | — | ● ACTIVE |
Cross Machine, INC. | Berlin | NH | — | ● ACTIVE |
Cryoworks, INC. | Jurupa Valley | CA | — | ● ACTIVE |
| CSCrystal Steel Fabricators INC | Delmar | DE | — | ● ACTIVE |
| CMCunningham Machine Co., INC. | Chelmsford | MA | — | ● ACTIVE |
Cunningham Manufacturing CO | Seattle | WA | — | ● ACTIVE |
| CPCurtis Products INC | South Bend | IN | 100–499 | ● ACTIVE |
Custom Manufacturing Services, INC | Princeton | WV | — | ● ACTIVE |
Custom Marine INC | Neenah | WI | 20–99 | ● ACTIVE |
Custom Specialty Fabrication LLC | Aiken | SC | — | ● ACTIVE |
Custom Tower LLC | Scott | LA | — | ● ACTIVE |
Dane Manufacturing CO | Waunakee | WI | 100–499 | ● ACTIVE |
Davlan Engineering, INC | Saint Louis | MO | — | ● ACTIVE |
Dayton-granger, INC. | Fort Lauderdale | FL | — | ● ACTIVE |
Dayton Superior Corporation | Miamisburg | OH | — | ● ACTIVE |
Dbs Manufacturing, Incorporated | Atlanta | GA | — | ● ACTIVE |
| DSDeines-nitz Solutions, LLC | Erie | IL | 20–99 | ● ACTIVE |
| DJDe Jong Manufacturing, INC. | New Sharon | IA | 20–99 | ● ACTIVE |
Delaco Steel CORP | Dearborn | MI | — | ● ACTIVE |
De Perini Metal Fabricators, INC. | Gaithersburg | MD | — | ● ACTIVE |
| DSDeweys Service Company, LLC | Columbia | SC | — | ● ACTIVE |
Dexmet Corporation | Wallingford | CT | — | ● ACTIVE |