| KCKendon Corporation | Muncie | IN | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| KFKnapp Foundry Company INC (1677010014) | Akron | OH | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| LPLa Porte Technologies LLC | La Porte | IN | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| LMLaurel Machine & Foundry Hawkes Plant | Laurel | MS | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| LFLebaron Foundry INC | Brockton, City of | MA | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| LFLeed Foundry Inc/st Clair | Saint Clair | PA | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| LFLynchburg Foundry Llc, D/b/a Archer Creek Foundry | Lynchburg | VA | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| MIMahle Inc-muskegon Hts Complex | Muskegon | MI | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| MFMansfield Foundry Corporation | Mansfield | OH | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| MCMcwane Cast Iron Pipe CO. | Birmingham | AL | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| MMMidwest Metallurgical Laboratory Site | Marshall | MI | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| MIMp Industries, INC. | O'fallon | MO | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| MCMunicipal Castings INC | Madison | MN | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| NFNeenah Foundry CO - Plants 2 and 3 | Neenah | WI | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| NCNew Castle Foundry/new Castle | New Castle | PA | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| NHNew Haven Foundry | New Haven | MI | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| NINorgren INC | Littleton | CO | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
 Oil City Iron Works INC | Corsicana | TX | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| OGOz Gedney Llc/shoemakersville Plt | Shoemakersville | PA | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| PIParamelt Icd Warehouse | Muskegon | MI | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| PGParker Gear Pump Division | Youngstown | OH | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| PIPenatek Inds INC | Odessa | TX | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| PFPentair Flow Technologies, LLC - Ashland Casting Center | Ashland | OH | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| PFPioneer Foundry CO INC | Jackson | MI | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| PPPipe Properties, LLC and Gateway View, LLC | Chattanooga | TN | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| PIPrimecast, Inc.(former) | South Beloit | IL | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| PPProcess Prototype INC | Romulus | MI | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| PCPure Castings | Austin | TX | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| QCQuincy Castings, INC. | Quincy | OH | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| RDRacer Danville Landfill | Danville | IL | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| RTRadford Trading, LLC | Radford | VA | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| RMRainbow Muffler & Brake | Sandusky | OH | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| RFRmg Foundry | Mishawaka | IN | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| RFRobinson Foundry INC | Alexander City | AL | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| RSRoss Sand Casting Industries, Inc., Plan | Winchester | IN | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| RSRoss Sand Casting Industry, LLC | Orrville | OH | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| SISandwich Iron Foundry | Plano | IL | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| SEScott Engineering and Procurement, INC. (1431004456) | Loveland | OH | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| SFSeaboard Foundry | Johnston, Town of | RI | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| SFSherman Foundry | Sherman | TX | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| SCSomerset Consolidate/somerset | Somerset | PA | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| SFSparta Foundry INC | Sparta | MI | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| SFSpecialty Foundry | Brockton | MA | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| SFSpitz Foundry INC | Hastings | NE | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| SCSpring City Elec/spring City | Spring City | PA | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| SISpringfield Iron Works INC | Chicopee | MA | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| SLState Line Foundries INC | Roscoe | IL | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| SFStaver Foundry CO | Virginia | MN | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| SCSterling Casting | Bluffton | IN | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| SFSturgis Foundry Corporation | Sturgis | MI | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
