| PFPlymouth Foundry Incorporated | Plymouth | IN | Primary Metal Manufacturing331511 | 20-99 | ◐ LIKELY ACTIVE |
| PTPlymouth Tube Company | Eupora | MS | Primary Metal Manufacturing331210 | — | ◐ LIKELY ACTIVE |
| PTPlymouth Tube Company | Winamac | IN | Primary Metal Manufacturing331210 | — | ◐ LIKELY ACTIVE |
| PPom,inc | Russellville | AR | Primary Metal Manufacturing331523 | 20-99 | ◐ LIKELY ACTIVE |
| PCPort City Metal Products | Muskegon | MI | Primary Metal Manufacturing331523 | — | ◐ LIKELY ACTIVE |
| PCPressure Cast Products Corporation | Oakland | CA | Primary Metal Manufacturing331521 | 1-19 | ◐ LIKELY ACTIVE |
| PMPrime Metals Acquisition LLC - Lucerne Mines | Lucernemines | PA | Primary Metal Manufacturing331110 | — | ◐ LIKELY ACTIVE |
| PPPrimus Pipe and Tube INC | Wildwood | FL | Primary Metal Manufacturing331210 | 100-499 | ◐ LIKELY ACTIVE |
| PIPrl Ind Inc/cornwall | Cornwall | PA | Primary Metal Manufacturing331513 | — | ◐ LIKELY ACTIVE |
| PIPrl Ind Inc/lebanon | Lebanon | PA | Primary Metal Manufacturing331513 | — | ◐ LIKELY ACTIVE |
| PGPrysmain Group - General Cable | Lawrenceburg | KY | Primary Metal Manufacturing331420 | — | ◐ LIKELY ACTIVE |
| PCPure Castings | Lockhart | TX | Primary Metal Manufacturing331512 | 20-99 | ◐ LIKELY ACTIVE |
| QEQuality Electric Steel Castings | Houston | TX | Primary Metal Manufacturing331513 | — | ◐ LIKELY ACTIVE |
| QWQuirk Wire CO INC | West Brookfield | MA | Primary Metal Manufacturing331422 | 20-99 | ◐ LIKELY ACTIVE |
| RPRane Precision Die Casting | Russellville | KY | Primary Metal Manufacturing331523 | — | ◐ LIKELY ACTIVE |
| RAReal Alloy Specification, LLC - Wabash, IN | Wabash | IN | Primary Metal Manufacturing331314 | 100-499 | ◐ LIKELY ACTIVE |
| RSRec Solar Grade Silicon | Moses Lake | WA | Nonmetallic Mineral Product Manufacturing327992 | 100-499 | ◐ LIKELY ACTIVE |
| RCRepublic Conduit INC. (pka Maverick C&p Inc.) | Cedar Springs | GA | Primary Metal Manufacturing331210 | — | ◐ LIKELY ACTIVE |
| RSRepublic Steel Massillon Cfb | Massillon | OH | Primary Metal Manufacturing331111 | — | ◐ LIKELY ACTIVE |
| RSRepublic Steel Wire Processing, LLC | Solon | OH | Primary Metal Manufacturing331221 | — | ◐ LIKELY ACTIVE |
| RPResonac Powdered Metals America, INC | Greensburg | IN | Primary Metal Manufacturing331492 | 100-499 | ◐ LIKELY ACTIVE |
| RCRevere Copper Products INC | Rome | NY | Primary Metal Manufacturing331420 | — | ◐ LIKELY ACTIVE |
| RSRevere Smelting & Refining CORP | Middletown | NY | Primary Metal Manufacturing331492 | — | ◐ LIKELY ACTIVE |
| RSRevere South INC. | Mebane | NC | Primary Metal Manufacturing331420 | — | ◐ LIKELY ACTIVE |
Reynolds Consumer Products LLC | Wheeling | IL | Primary Metal Manufacturing331313 | 100-499 | ◐ LIKELY ACTIVE |
Reynolds Consumer Products LLC | Malvern | AR | Primary Metal Manufacturing331315 | — | ◐ LIKELY ACTIVE |
| RSReynolds Services INC | Greenville | PA | Primary Metal Manufacturing331221 | 100-499 | ◐ LIKELY ACTIVE |
| RHR H Sheppard CO INC | Hanover | PA | Primary Metal Manufacturing331511 | — | ◐ LIKELY ACTIVE |
| RIRichmond Industries INC | Dayton | NJ | Primary Metal Manufacturing331523 | — | ◐ LIKELY ACTIVE |
| RMRigidized Metals CORP | Buffalo | NY | Primary Metal Manufacturing331491 | 20-99 | ◐ LIKELY ACTIVE |
| RMRitchey Metals CO Inc/hendersonville Plt | Canonsburg | PA | Primary Metal Manufacturing331314 | — | ◐ LIKELY ACTIVE |
| RIRiverdale Industries LLC | Riverdale | IL | Chemical Manufacturing325910 | 20-99 | ◐ LIKELY ACTIVE |
| RSRmf Steel Products | Grandview | MO | Primary Metal Manufacturing331513 | 20-99 | ◐ LIKELY ACTIVE |
| RMRocky Mountain Steel Mill | Pueblo | CO | Primary Metal Manufacturing331110 | — | ◐ LIKELY ACTIVE |
| RNRolls-royce Naval Marine INC | Pascagoula | MS | Primary Metal Manufacturing331529 | — | ◐ LIKELY ACTIVE |
| RMRoyal Metal Products, INC. | Temple | GA | Primary Metal Manufacturing331210 | 100-499 | ◐ LIKELY ACTIVE |
| SASa Alloys | Columbia | PA | Primary Metal Manufacturing331314 | — | ◐ LIKELY ACTIVE |
| SMSabin Metal West CORP | Williston | ND | Primary Metal Manufacturing331492 | — | ◐ LIKELY ACTIVE |
| STSalem Tube Mfg | Greenville | PA | Primary Metal Manufacturing331110 | — | ◐ LIKELY ACTIVE |
| SSSamuel Steel Pickling CO | Twinsburg | OH | Primary Metal Manufacturing331221 | — | ◐ LIKELY ACTIVE |
| SSSand Springs | Sand Springs | OK | Primary Metal Manufacturing331110 | — | ◐ LIKELY ACTIVE |
| SASanoh America Archbold Facility | Archbold | OH | Primary Metal Manufacturing331210 | — | ◐ LIKELY ACTIVE |
| SESapa Extrusions | Sidney | OH | Primary Metal Manufacturing331318 | — | ◐ LIKELY ACTIVE |
| SIScepter INC | Bicknell | IN | Primary Metal Manufacturing331314 | — | ◐ LIKELY ACTIVE |
| SMSchuylkill Metals Division of Exide CORP | Forest City | MO | Primary Metal Manufacturing331314 | — | ◐ LIKELY ACTIVE |
| SMScm Metal Products, INC. | Research Triangle Park | NC | Primary Metal Manufacturing331420 | — | ◐ LIKELY ACTIVE |
| SAScottsboro Aluminum Industries | Scottsboro | AL | Primary Metal Manufacturing331313 | 1-19 | ◐ LIKELY ACTIVE |
| SLSdi Lafarga LLC - Copperworks Facility | New Haven | IN | Primary Metal Manufacturing331314 | — | ◐ LIKELY ACTIVE |
| SSSeacast Seattle | Seattle | WA | Primary Metal Manufacturing331512 | — | ◐ LIKELY ACTIVE |
| SSSeah Steel USA | Houston | TX | Primary Metal Manufacturing331210 | 20-99 | ◐ LIKELY ACTIVE |