| RARMG Anniston LLC | Anniston | AL | 100–499 | ◐ LIKELY ACTIVE |
| STSouthern Trenchless Solutions LLC | La Feria | TX | — | ◐ LIKELY ACTIVE |
| SFSP Foundry | South Coffeyville | OK | 100–499 | ◐ LIKELY ACTIVE |
| SMSt Marys Foundry | Saint Marys | OH | 100–499 | ◐ LIKELY ACTIVE |
| TFTrumbull Foundry and Alloy Henry Street | Niles | OH | 1–19 | ◐ LIKELY ACTIVE |
| TPTyler Pipe Company - Texas | Tyler | TX | 100–499 | ◐ LIKELY ACTIVE |
| UCUnicast Company | Boyertown | PA | 20–99 | ◐ LIKELY ACTIVE |
| UCUnion Casting Industries T/A Industrial Ferguson Foundry | Union | NJ | 1–19 | ◐ LIKELY ACTIVE |
| VPViking Pump Inc - Foundry (A Unit of IDEX Corporation) | Cedar Falls | IA | 20–99 | ◐ LIKELY ACTIVE |
| VNVoestalpine Nortrak | Decatur | IL | 100–499 | ◐ LIKELY ACTIVE |
| WFWashington Foundries INC | Hewlett | NY | — | ◐ LIKELY ACTIVE |
 Waupaca Foundry, Inc. Plant 5 | Tell City | IN | 500+ | ◐ LIKELY ACTIVE |
| WPWest Point Foundry & Machine CO. | West Point | GA | 20–99 | ◐ LIKELY ACTIVE |
| WSWest Salisbury Foundry and Machine Co., Inc. | West Salisbury | PA | 20–99 | ◐ LIKELY ACTIVE |
| WCWisconsin Cast Iron | Kohler | WI | 100–499 | ◐ LIKELY ACTIVE |
| ECEnterprise Casting Corporation | Lewiston | ME | — | ◇ UNVERIFIED |
| FFerroloy | Wichita | KS | — | ◇ UNVERIFIED |
| KFKelly Foundry & Machine Company, INC. | Elkins | WV | — | ◇ UNVERIFIED |
| MPMetlcast Products Incorporated | Salina | KS | — | ◇ UNVERIFIED |
| NCNorthland Castings Corporation | Hart | MI | — | ◇ UNVERIFIED |
| PAPacific Alloy Castings INC | South Gate | CA | — | ◇ UNVERIFIED |
| PGPacific Gear Technology, INC. | Norco | CA | — | ◇ UNVERIFIED |
| RFRusselloy Foundry INC | Durant | IA | — | ◇ UNVERIFIED |
| ABA & B Foundry INC | Birmingham | AL | — | ◇ UNVERIFIED |
| ABA B & I Foundry | Oakland | CA | — | ◇ UNVERIFIED |
| AAAccess Auto Salvage | Independence | MO | — | ◇ UNVERIFIED |
| ATAccucast Technology, L.l.c. | South Bend | IN | — | ◇ UNVERIFIED |
| AFAcheson Foundry & Machine Works, INC. | Chattanooga | TN | — | ◇ UNVERIFIED |
| ACAcme Castings INC | Huntington Park | CA | — | ◇ UNVERIFIED |
| ACAcme Castings INC | Huntington Park | CA | — | ◇ UNVERIFIED |
 Acme Foundry CO | Minneapolis | MN | — | ◇ UNVERIFIED |
| ACAdvanced Cast Products/meadville | Meadville | PA | — | ◇ UNVERIFIED |
| ANAkers Natl Roll Co/hyde Park Foundry | Hyde Park | PA | — | ◇ UNVERIFIED |
| AFAkron Foundry, INC. | Akron | IN | — | ◇ UNVERIFIED |
| ACAlabama Casting CO | Aliceville | AL | — | ◇ UNVERIFIED |
| ABAlfredson Brothers Construction Company | Menominee | MI | — | ◇ UNVERIFIED |
| AFAlhambra Foundry CO LTD | Alhambra | CA | — | ◇ UNVERIFIED |
| ACAllegheny Cast Metals, INC. | Titusville | PA | — | ◇ UNVERIFIED |
| AFAllegheny Foundry | Pittsburgh | PA | — | ◇ UNVERIFIED |
| AFAllegheny Foundry Co/bolivar | Bolivar | PA | — | ◇ UNVERIFIED |
| AIAlmco INC | Albert Lea | MN | — | ◇ UNVERIFIED |
 American Cast Iron Pipe CO. | Houston | TX | — | ◇ UNVERIFIED |
| AMA. Moresi Foundry, INC. | Jeanerette | LA | — | ◇ UNVERIFIED |
| ARAmsted Rail - Columbus Plant (0125100987) | Groveport | OH | — | ◇ UNVERIFIED |
| AAndritz | Tualatin | OR | — | ◇ UNVERIFIED |
| AFAnstey Foundry | Stevensville | MI | — | ◇ UNVERIFIED |
| ALAozi-brookville, LLC | Indianapolis | IN | — | ◇ UNVERIFIED |
| ACApex Consulting | Thornton | CO | — | ◇ UNVERIFIED |
| ACAsama Coldwater Manufacturing Georgia | Warrenton | GA | — | ◇ UNVERIFIED |
| ACAti Casting Service | Alpena | MI | — | ◇ UNVERIFIED |
| ACAti Casting Services INC. | La Porte | IN | — | ◇ UNVERIFIED |
| ASAtlantic States Cast Iron Pipe | Phillipsburg | NJ | — | ◇ UNVERIFIED |
| AFAuburn Foundry, INC Plant 1 | Auburn | IN | — | ◇ UNVERIFIED |
| AGAustin Gray Iron Foundry | Sheboygan | WI | — | ◇ UNVERIFIED |
| BABabcock and Wilcox - Foundry Operations (1677020054) | Barberton | OH | — | ◇ UNVERIFIED |
| BIBadger Iron Works INC | Menomonie | WI | — | ◇ UNVERIFIED |
| BEBagby Enterprises INC. | Branson | MO | — | ◇ UNVERIFIED |
| BHBag House Industrial Sheet Metal | Corona | CA | — | ◇ UNVERIFIED |
| BFBama Foundry INC | Montgomery | AL | — | ◇ UNVERIFIED |
| BSBarber Steel Foundry Corporation | Rothbury | MI | — | ◇ UNVERIFIED |
| BSBarnmaster Supply LLC Dba Marnmaster | Ontario | CA | — | ◇ UNVERIFIED |
| BPBarry Pattern and Foundry Company, INC. | Birmingham | AL | — | ◇ UNVERIFIED |
| BIBehr Iron & Metal | Peoria | IL | — | ◇ UNVERIFIED |
| BCBelcher (advanced Cast Products) | Easton | MA | — | ◇ UNVERIFIED |
| BFBelgium Foundry CORP | Belgium | WI | — | ◇ UNVERIFIED |
| BFBell Foundry CO | South Gate | CA | — | ◇ UNVERIFIED |
| BCBentonville Castings Company | Bentonville | AR | — | ◇ UNVERIFIED |
| BFBerne Foundry LLC (a1453) | Pigeon | MI | — | ◇ UNVERIFIED |
| BFBig Four Foundries CORP | Tulsa | OK | — | ◇ UNVERIFIED |
| BTBingham & Taylor | Rocky Hill | CT | — | ◇ UNVERIFIED |
| BFBlackhawk Foundry & Machine CO | Davenport | IA | — | ◇ UNVERIFIED |
| BFBloomfield Foundry, INC | Bloomfield | IA | — | ◇ UNVERIFIED |
| BFBorough Furnace, Inc. | East Syracuse | NY | — | ◇ UNVERIFIED |
| BFBoyertown Foundry Co/fka Eafco | New Berlinville | PA | — | ◇ UNVERIFIED |
| BIBrandenburg Indus Svc CO at Brillion Ironworks | Brillion | WI | — | ◇ UNVERIFIED |
| BMBrom Machine & Foundry CO | Winona | MN | — | ◇ UNVERIFIED |
| BFBrown Foundry - Dupl of Vtdec 689 | Swanton | VT | — | ◇ UNVERIFIED |
| BIBryant Investments of West Texas LLC | Lubbock | TX | — | ◇ UNVERIFIED |
| BBBuckner By Storm | Fresno | CA | — | ◇ UNVERIFIED |
| BMBurgess-norton Mfg CO / Std Auto Parts CO Div | Muskegon | MI | — | ◇ UNVERIFIED |
| BGB.w. Grinding CO. | Lyons | OH | — | ◇ UNVERIFIED |
| CCCamden Casting Center INC | Camden | TN | — | ◇ UNVERIFIED |
| CCCamden Casting Center INC | Camden | TN | — | ◇ UNVERIFIED |
| CFCampbell Foundry Company | Harrison | NJ | — | ◇ UNVERIFIED |
| CICarmack INC Dba Phenix Foundry | Phenix City | AL | — | ◇ UNVERIFIED |
| CCCase Corporation - Racine Foundry Plant | Racine | WI | — | ◇ UNVERIFIED |
| CICastalloy INC Walterboro | Walterboro | SC | — | ◇ UNVERIFIED |
| CTCast-fab Technologies, INC. | Cincinnati | OH | — | ◇ UNVERIFIED |
| CICast Industries LLC | Albany | MN | — | ◇ UNVERIFIED |
| CPCastwell Products INC | Skokie | IL | — | ◇ UNVERIFIED |
| CICaterpillar INC | Hodges | SC | — | ◇ UNVERIFIED |
| CICaterpillar INC. | Mapleton | IL | — | ◇ UNVERIFIED |
| CICaterpillar INC Seals Metalcasting Facility | Toccoa | GA | — | ◇ UNVERIFIED |
| CICelestial Iron Works | Lawrence | KS | — | ◇ UNVERIFIED |
| CSCe Systems | Columbus | IN | — | ◇ UNVERIFIED |
| CFCharlette Foundry | Blackstone | MA | — | ◇ UNVERIFIED |
| CIChassix, INC. | Columbus | GA | — | ◇ UNVERIFIED |
| CLChrysler, LLC | Indianapolis | IN | — | ◇ UNVERIFIED |
| CACitation Aluminum, LLC | Bay Minette | AL | — | ◇ UNVERIFIED |
| CMClearfield Mach Co/3rd & Everett Streets | Clearfield | PA | — | ◇ UNVERIFIED |
