| NANorthwest Aluminum & Brass Foundries, INC. | Muskego | WI | — | ◇ UNVERIFIED |
| NBNorthwest Brass & Aluminum Foundry INC | Portland | OR | — | ◇ UNVERIFIED |
| NCNorthwest Casting INC | Saint Paul | MN | — | ◇ UNVERIFIED |
| NCNorthwest Castings | Seattle | WA | — | ◇ UNVERIFIED |
| NMNrb Metals LLC | Saint Charles | MN | — | ◇ UNVERIFIED |
| OLOberdorfer LLC | Syracuse | NY | — | ◇ UNVERIFIED |
| OCO'keefe Casting | Lorain | OH | — | ◇ UNVERIFIED |
| OAOlson Aluminum Castings | Rockford | IL | — | ◇ UNVERIFIED |
| OSOmaha Steel Castings CO | Omaha | NE | — | ◇ UNVERIFIED |
| OCOntario Castings, Performance Aluminum Products, Reeds Patterns & Molds, R&S ... | Ontario | CA | — | ◇ UNVERIFIED |
| PCPacific Car and Foundry CO | Renton | WA | — | ◇ UNVERIFIED |
| PSPacific Steel Casting Co-plant | Berkeley | CA | — | ◇ UNVERIFIED |
| PSPacific Steel Casting Co-plant #1 | Berkeley | CA | — | ◇ UNVERIFIED |
| PSPacific Steel Casting Co-plant #3 | Berkeley | CA | — | ◇ UNVERIFIED |
| PEPa Equipment Rental | Turtle Creek | PA | — | ◇ UNVERIFIED |
| PFPalmer Foundry | Palmer | MA | — | ◇ UNVERIFIED |
| PIPatsy Iron Works INC. | Elmsford | NY | — | ◇ UNVERIFIED |
| PSPcc Structurals INC | Portland | OR | — | ◇ UNVERIFIED |
 Pcc Structurals INC Lsbs Iii | Portland | OR | — | ◇ UNVERIFIED |
| Pcc Structurals, Inc.-machine Shop | Portland | OR | — | ◇ UNVERIFIED |
| Pcc Structurals, INC. - West Haven | Ogden | UT | — | ◇ UNVERIFIED |
| PFPearce Foundry, INC. | Prairieville | LA | — | ◇ UNVERIFIED |
| PCPechiney Cast Plate INC | Vernon | CA | — | ◇ UNVERIFIED |
| PCPenncast Corp/marietta | Marietta | PA | — | ◇ UNVERIFIED |
| PSPennsylvania Steel Fndy & Machine CO | Hamburg | PA | — | ◇ UNVERIFIED |
| PDPentz Design Pattern and Foundry INC | Duvall | WA | — | ◇ UNVERIFIED |
| PAPerformance Aluminum Products | Ontario | CA | — | ◇ UNVERIFIED |
| PIPhoenix Industries | Juniata | NE | — | ◇ UNVERIFIED |
| PRPlano Rod Mill | Plano | TX | — | ◇ UNVERIFIED |
| PTPolich Tallix INC | Rock Tavern | NY | — | ◇ UNVERIFIED |
| PAPortage Aluminum Foundry | Galesburg | MI | — | ◇ UNVERIFIED |
| PFPrecise Forms, INC. | Bates City | MO | — | ◇ UNVERIFIED |
| PCPrecision Cast Products | Oakland | CA | — | ◇ UNVERIFIED |
| PCPrecision Cut Ind - 60 Ram Drive | Hanover | PA | — | ◇ UNVERIFIED |
| PMPrenatt Manufacturing, INC. | Pleasantville | PA | — | ◇ UNVERIFIED |
 Prl Industries INC | Lebanon | PA | — | ◇ UNVERIFIED |
| PCProduction Castings | Missouri | MO | — | ◇ UNVERIFIED |
| PCProgress Casting Group INC - Albert Lea | Albert Lea | MN | — | ◇ UNVERIFIED |
| PCProgress Casting Group INC - Plymouth | Plymouth | MN | — | ◇ UNVERIFIED |
| PLProto Labs INC | Plymouth | MN | — | ◇ UNVERIFIED |
| PVPro V Enterprises | Dearborn | MI | — | ◇ UNVERIFIED |
 P.t. Armor, INC. | Fairfax | VA | — | ◇ UNVERIFIED |
| PCPumpworks Castings | Lufkin | TX | — | ◇ UNVERIFIED |
| QMQuality Mold INC. | Akron | OH | — | ◇ UNVERIFIED |
| QNQuality Non-ferrous Foundry | Wyoming | MI | — | ◇ UNVERIFIED |
| QFQuantum Fuel Systems Technologies INC | Lake Forest | CA | — | ◇ UNVERIFIED |
| QFQuincy Foundry & Pattern INC | Quincy | IL | — | ◇ UNVERIFIED |
| RPR2 Properties, LLC | Waukesha | WI | — | ◇ UNVERIFIED |
| RNRacer-saginaw Nodular Indust | Saginaw | MI | — | ◇ UNVERIFIED |
| RSRacine Steel Castings Div | Racine | WI | — | ◇ UNVERIFIED |
| RCRainbow Custom Woodworking | Alexandria | VA | — | ◇ UNVERIFIED |
| RFRamirez Foundry | El Cajon | CA | — | ◇ UNVERIFIED |
| RDRangers Die Casting CO | Lynwood | CA | — | ◇ UNVERIFIED |
| RARavenna Aluminum Industries INC | Ravenna | OH | — | ◇ UNVERIFIED |
| RFRebah Fabrication INC. | Orlando | FL | — | ◇ UNVERIFIED |
| RARegen Alum Llc/yoe | Yoe | PA | — | ◇ UNVERIFIED |
| RSRelativity Space INC | Inglenook | CA | — | ◇ UNVERIFIED |
| RSReliable Steel Building Products INC | South Gate | CA | — | ◇ UNVERIFIED |
| RSRenco Systems INC | Banning | CA | — | ◇ UNVERIFIED |
| RTRennsteig Tools INC | Camarillo | CA | — | ◇ UNVERIFIED |
| RIReo Industries, INC. Dba La Aluminum Casting CO. | Hayden | ID | — | ◇ UNVERIFIED |
| REReuland Electric CO | Industry | CA | — | ◇ UNVERIFIED |
| RIRexnord Industries LLC | Brownsville | TX | — | ◇ UNVERIFIED |
| RHR-hive Holdings, LLC | Kenosha | WI | — | ◇ UNVERIFIED |
| RMR&h Machine INC | Caldwell | ID | — | ◇ UNVERIFIED |
| RWRichard W Hill LLC | Portland | OR | — | ◇ UNVERIFIED |
| RFRichmond Foundry | Richmond | TX | — | ◇ UNVERIFIED |
| RRRin & Rin LLC | West Valley City | UT | — | ◇ UNVERIFIED |
| RIR&k Industrial Products INC | Richmond | CA | — | ◇ UNVERIFIED |
| RSRobert St. Croix Sculpture Studio & Foundry, INC. | West Palm Beach | FL | — | ◇ UNVERIFIED |
| RWRobert White | Centralia | IL | — | ◇ UNVERIFIED |
| RFRockford Foundries | Rockford | IL | — | ◇ UNVERIFIED |
| RIRock Island Arsenal | Rock Island | IL | — | ◇ UNVERIFIED |
| RMRoe Machine & Pattern Works | Omaha | NE | — | ◇ UNVERIFIED |
| RERoemer Electric Steel Foundry | Longview | WA | — | ◇ UNVERIFIED |
| RIRoper Industries INC | Denver | CO | — | ◇ UNVERIFIED |
| RARoss Aluminum Foundries Avon Div | Sidney | OH | — | ◇ UNVERIFIED |
| RARoss Aluminum Foundries Ii | Sidney | OH | — | ◇ UNVERIFIED |
| RCRoss Casting & Innovation, LLC | Sidney | OH | — | ◇ UNVERIFIED |
| RSRothbury Steel INC | Rothbury | MI | — | ◇ UNVERIFIED |
| RQRoyer Quality Castings, Incorporated | Boyertown | PA | — | ◇ UNVERIFIED |
| RERyan Engineering Design | Pellston | MI | — | ◇ UNVERIFIED |
| RRyerson | Marshalltown | IA | — | ◇ UNVERIFIED |
| SSSamuel Son & CO INC | Portland | OR | — | ◇ UNVERIFIED |
| SCSandwich Casting and Machine | Sandwich | IL | — | ◇ UNVERIFIED |
| SCSandwich Casting & Machine/trio Foundry INC | Montgomery | IL | — | ◇ UNVERIFIED |
| SFSanta Fe Foundry | Santa Fe | NM | — | ◇ UNVERIFIED |
| SBS & B Aluminum Foundry, INC. | West Valley City | UT | — | ◇ UNVERIFIED |
| SPSchaffran Propeller Usa, LLC | Miami | FL | — | ◇ UNVERIFIED |
| SSSewah Studios | Marietta | OH | — | ◇ UNVERIFIED |
| SCSeybert Castings, INC. | Huntingdon Valley | PA | — | ◇ UNVERIFIED |
| SESharon Escoto | Hesperia | CA | — | ◇ UNVERIFIED |
| SAShipston Aluminum Technologies Incorporated | Franklin | IN | — | ◇ UNVERIFIED |
| SESiemens Energy Inc.gas Services Blades&vanes Tampa | Gibsonton | FL | — | ◇ UNVERIFIED |
| SMSipi Metals CORP | Chicago | IL | — | ◇ UNVERIFIED |
| SSSivyer Steel Castings LLC | Bettendorf | IA | — | ◇ UNVERIFIED |
| SSSivyer Steel CORP | Bettendorf | IA | — | ◇ UNVERIFIED |
| SSSivyer Steel Corporation | Bettendorf | IA | — | ◇ UNVERIFIED |
| SMSkagit Manufacturing Site | Sedro Woolley | WA | — | ◇ UNVERIFIED |
| SCSmith Castings INC | Kingsford | MI | — | ◇ UNVERIFIED |
