| MSMillennium Steel Service | Princeton | IN | Primary Metal Manufacturing331110 | 20-99 | ◐ LIKELY ACTIVE |
| NHNCSP Holdco, LLC | New Castle | IN | Primary Metal Manufacturing331221 | 20-99 | ◐ LIKELY ACTIVE |
| NHNight Hawk | Fort Wayne | IN | Primary Metal Manufacturing331222 | 20-99 | ◐ LIKELY ACTIVE |
| NSNippon Steel Pipe America Inc | Seymour | IN | Primary Metal Manufacturing331110 | 100-499 | ◐ LIKELY ACTIVE |
| OAO&k American - Seymour Plant | Seymour | IN | Primary Metal Manufacturing331222 | 20-99 | ◐ LIKELY ACTIVE |
| OHOPTA-Burns Harbor | Burns Harbor | IN | Primary Metal Manufacturing331110 | 1-19 | ◐ LIKELY ACTIVE |
| PPcp | Portland | IN | Primary Metal Manufacturing331523 | 20-99 | ◐ LIKELY ACTIVE |
| PGPhoenix Global, LLC-Burns Harbor | Burns Harbor | IN | Primary Metal Manufacturing331110 | 100-499 | ◐ LIKELY ACTIVE |
| PGPhoenix Global, LLC-Indiana Harbor East | East Chicago | IN | Primary Metal Manufacturing331110 | 20-99 | ◐ LIKELY ACTIVE |
| PGPhoenix Global, LLC-Indiana Harbor West | East Chicago | IN | Primary Metal Manufacturing331110 | 20-99 | ◐ LIKELY ACTIVE |
| PTPTC Tubular Products LLC Richmond Plant | Richmond | IN | Primary Metal Manufacturing331210 | 20-99 | ◐ LIKELY ACTIVE |
| SIScepter Inc - Bicknell Operations | Bicknell | IN | Primary Metal Manufacturing331314 | 20-99 | ◐ LIKELY ACTIVE |
| SLSDI LaFarga Copperworks, LLC. | New Haven | IN | Primary Metal Manufacturing331420 | 100-499 | ◐ LIKELY ACTIVE |
Space Alloys USA LLC | Windfall | IN | Primary Metal Manufacturing331222 | — | ◐ LIKELY ACTIVE |
| SDSteel Dynamics, Inc. - Engineered Bar Products | Pittsboro | IN | Primary Metal Manufacturing331110 | 500+ | ◐ LIKELY ACTIVE |
| SDSteel Dynamics, Inc. - Flat Roll Group - Butler | Butler | IN | Primary Metal Manufacturing331110 | 500+ | ◐ LIKELY ACTIVE |
| SDSteel Dynamics, Inc. - Flat Roll Group - Jeffersonville | Jeffersonville | IN | Primary Metal Manufacturing331110 | 100-499 | ◐ LIKELY ACTIVE |
| SESuperior Essex | Fort Wayne | IN | Primary Metal Manufacturing331420 | 100-499 | ◐ LIKELY ACTIVE |
| UGU.S. Granules Corporation - Plymouth Facility | Plymouth | IN | Primary Metal Manufacturing331314 | 20-99 | ◐ LIKELY ACTIVE |
Waupaca Foundry, Inc. Plant 5 | Tell City | IN | Primary Metal Manufacturing331511 | 500+ | ◐ LIKELY ACTIVE |
| WFWinchester Foundry | Winchester | IN | Primary Metal Manufacturing331524 | 20-99 | ◐ LIKELY ACTIVE |
| SISincerus Incorporated | Lawrence | IN | Primary Metal Manufacturing331528 | — | ◇ UNVERIFIED |
| ATAccucast Technology, L.l.c. | South Bend | IN | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| AMAero Metals, INC. | La Porte | IN | Primary Metal Manufacturing331512 | — | ◇ UNVERIFIED |
| AWAlcoa Warrick LLC | Newburgh | IN | Primary Metal Manufacturing331315 | — | ◇ UNVERIFIED |
| AWAlcoa Warrick Power Plant | Boonville | IN | Primary Metal Manufacturing331315 | — | ◇ UNVERIFIED |
| AAAltec Aluminum Technologies | Watson | IN | Primary Metal Manufacturing331316 | — | ◇ UNVERIFIED |
| AMAluminum Metals Company | Elkhart | IN | Primary Metal Manufacturing331312 | — | ◇ UNVERIFIED |
| AMArcelor Mittal | Burns Harbor | IN | Primary Metal Manufacturing331111 | — | ◇ UNVERIFIED |
| ABArcelormittal Burns Harbor | Porter | IN | Primary Metal Manufacturing331111 | — | ◇ UNVERIFIED |
| ABArcelormittal Burns Harbor | Burns Harbor | IN | Primary Metal Manufacturing331111 | — | ◇ UNVERIFIED |
| AIArcelormittal Ihlc | East Chicago | IN | Primary Metal Manufacturing331111 | — | ◇ UNVERIFIED |
| AIArcelormittal Indiana Harbor | East Chicago | IN | Primary Metal Manufacturing331111 | — | ◇ UNVERIFIED |
| AIASRD Industries, LLC and Allied Steel Rule Dies Inc | Indianapolis | IN | Primary Metal Manufacturing331221 | — | ◇ UNVERIFIED |
| ACAti Casting Services INC. | La Porte | IN | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| BBBall Brass & Aluminum Foundry | Auburn | IN | Primary Metal Manufacturing331524 | — | ◇ UNVERIFIED |
| BPBarr Properties, LLC | Madison | IN | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| BBBridgeport Brass - Olin Brass | Indianapolis | IN | Primary Metal Manufacturing331411 | — | ◇ UNVERIFIED |
| BMBull Moose Tube Company Expansion | Elkhart | IN | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| CSCasteel Services, INC. | Kingsbury | IN | Primary Metal Manufacturing331513 | — | ◇ UNVERIFIED |
| CTCentury Tube LLC | Madison | IN | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| CSCe Systems | Columbus | IN | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| COCharles O. Hiler & Son in | Walkerton | IN | Primary Metal Manufacturing331492 | — | ◇ UNVERIFIED |
Chicago Magnesium Casting Company | Crown Point | IN | Primary Metal Manufacturing331523 | — | ◇ UNVERIFIED |
| CCCitation CORP | Butler | IN | Primary Metal Manufacturing331524 | — | ◇ UNVERIFIED |
| CSClosure System International | Crawfordsville | IN | Plastics and Rubber Products Manufacturing326199 | — | ◇ UNVERIFIED |
| CRCombustion Resources, LLC | Indianapolis | IN | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| DFDalton Foundry | Warsaw | IN | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| DHDekko Heating Technologies INC | Cromwell | IN | Primary Metal Manufacturing331491 | — | ◇ UNVERIFIED |
| EAE and H Tubing | Brownstown | IN | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |