| PTPrecision Tooling Technologies, LLC | Zeeland | MI | Primary Metal Manufacturing331110 | — | ◇ UNVERIFIED |
 Profile Extrusion CO INC | Coldwater | MI | Primary Metal Manufacturing331000 | — | ◇ UNVERIFIED |
| RCRail Components, Inc. | Muskegon | MI | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| RTRJ Torching, Inc. | Flint | MI | Primary Metal Manufacturing331410 | — | ◇ UNVERIFIED |
| RSRothbury Steel INC | Rothbury | MI | Primary Metal Manufacturing331513 | — | ◇ UNVERIFIED |
| RTR&R Tool, Inc. | Holland | MI | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| RERyan Engineering Design | Pellston | MI | Primary Metal Manufacturing331524 | — | ◇ UNVERIFIED |
| SHSamuel-whittar Holdings INC | Troy | MI | Primary Metal Manufacturing331221 | — | ◇ UNVERIFIED |
| SFSchwarb Foundry | Warren | MI | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| SISchwarb Industries INC | Troy | MI | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| SNSeverstal North America INC | Dearborn | MI | Primary Metal Manufacturing331111 | — | ◇ UNVERIFIED |
| SFSherwood Friction Materials | Detroit | MI | Primary Metal Manufacturing331221 | — | ◇ UNVERIFIED |
| SSShoreline Steel Supply INC | New Haven | MI | Primary Metal Manufacturing331221 | — | ◇ UNVERIFIED |
| SSigncomp | Grand Rapids | MI | Primary Metal Manufacturing331318 | — | ◇ UNVERIFIED |
| SFSuperb Fabricating LLC | New Hudson | MI | Primary Metal Manufacturing331221 | — | ◇ UNVERIFIED |
| TSTce Systems INC | Charlotte | MI | Primary Metal Manufacturing331491 | — | ◇ UNVERIFIED |
| TMT-four Manufacturing & Engineering, INC. | Ionia | MI | Primary Metal Manufacturing331313 | — | ◇ UNVERIFIED |
| TBThunder Bay Foundry | Alpena | MI | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| TATi Automotive (formerly Bundy Corportation) | Warren | MI | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| TGTi Group Automotive Systems LLC | Auburn Hills | MI | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| TTTrick Titanium | Holt | MI | Primary Metal Manufacturing331491 | — | ◇ UNVERIFIED |
| TCTurbo Components INC | Spring Lake | MI | Primary Metal Manufacturing331524 | — | ◇ UNVERIFIED |
| UAUacj Automotive-6th Street | Ludington | MI | Primary Metal Manufacturing331315 | — | ◇ UNVERIFIED |
| UAUacj Automotive Whitehall Industries INC | Ludington | MI | Primary Metal Manufacturing331315 | — | ◇ UNVERIFIED |
| USUS Steel | Detroit | MI | Primary Metal Manufacturing331111 | — | ◇ UNVERIFIED |
| VVValley / Vulcan Mold CO | Trenton | MI | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| VMVanguard Manufacturing INC | Grand Rapids | MI | Primary Metal Manufacturing331222 | — | ◇ UNVERIFIED |
| VVVSP Ventures Inc. | Jackson | MI | Primary Metal Manufacturing331110 | — | ◇ UNVERIFIED |
| WWWillet & Willet Holdings, LLC | Grand Rapids | MI | Primary Metal Manufacturing331491 | — | ◇ UNVERIFIED |
| WMWings Manufacturing Inc. | Mount Clemens | MI | Primary Metal Manufacturing331110 | — | ◇ UNVERIFIED |
| WEWkw Extrusion - Bowers Manufacturing CO | Kalamazoo | MI | Primary Metal Manufacturing331316 | — | ◇ UNVERIFIED |
| WCWlh Co., LLC | Marshall | MI | Primary Metal Manufacturing331529 | — | ◇ UNVERIFIED |
| XSXxx Sweeney Steel Products | Erie | MI | Primary Metal Manufacturing331221 | — | ◇ UNVERIFIED |
| ZMZd Metal Products Incorporated | Petoskey | MI | Primary Metal Manufacturing331523 | — | ◇ UNVERIFIED |
