| OKO.s. Kelly Company (0812100276) | Springfield | OH | Primary Metal Manufacturing331511 | — | ◐ LIKELY ACTIVE |
| PMPrecision Metalsmiths INC. | Markesan | WI | Primary Metal Manufacturing331511 | — | ◐ LIKELY ACTIVE |
| QCQuaker City Castings (0215090009) | Salem | OH | Primary Metal Manufacturing331511 | — | ◐ LIKELY ACTIVE |
| QCQuality Castings CO | Waukesha | WI | Primary Metal Manufacturing331511 | — | ◐ LIKELY ACTIVE |
| RIRomac Industries | Sultan | WA | Primary Metal Manufacturing331511 | — | ◐ LIKELY ACTIVE |
Sioux City Foundry CO | South Sioux City | NE | Primary Metal Manufacturing331419 | — | ◐ LIKELY ACTIVE |
| SAStandard Alloys Port Arthur | Port Arthur | TX | Primary Metal Manufacturing331511 | — | ◐ LIKELY ACTIVE |
| SUStarpipe USA Dba Sp Foundry / Sp Foundry | South Coffeyville | OK | Primary Metal Manufacturing331511 | — | ◐ LIKELY ACTIVE |
| SMSt. Marys Foundry INC. (0306010004) | Saint Marys | OH | Primary Metal Manufacturing331511 | — | ◐ LIKELY ACTIVE |
| TFTonkawa Foundry INC / Tonkawa Foundry | Tonkawa | OK | Primary Metal Manufacturing331511 | — | ◐ LIKELY ACTIVE |
| TPTyler Pipe | Tyler | TX | Primary Metal Manufacturing331511 | — | ◐ LIKELY ACTIVE |
| VIValmet INC | Waukesha | WI | Primary Metal Manufacturing331511 | — | ◐ LIKELY ACTIVE |
| VPViking Pump INC - South Main Facility | Cedar Falls | IA | Primary Metal Manufacturing331511 | — | ◐ LIKELY ACTIVE |
| WMWard Mfg Plt 1 & 2 | Blossburg | PA | Primary Metal Manufacturing331511 | — | ◐ LIKELY ACTIVE |
| WFWestern Foundries INC | Longmont | CO | Primary Metal Manufacturing331511 | — | ◐ LIKELY ACTIVE |
| WOWhemco - Ohio Foundry INC (0302020023) | Lima | OH | Primary Metal Manufacturing331511 | — | ◐ LIKELY ACTIVE |
| WCWinchester Coatings | Winchester | KY | Primary Metal Manufacturing331511 | — | ◐ LIKELY ACTIVE |
| CPCharlotte Pipe and Foundry Company | Charlotte | NC | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| GTGoulds Turbine Foundry | Slaton | TX | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| PFProspect Foundry LLC | Minneapolis | MN | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| ECEsco Corporation | Portland | OR | Primary Metal Manufacturing331511 | — | ◐ LIKELY ACTIVE |
| HHorizon | Nephi | UT | Primary Metal Manufacturing331511 | 20-99 | ◐ LIKELY ACTIVE |
| HEHoward Engineering CO | Naugatuck | CT | Primary Metal Manufacturing331511 | 1-19 | ◐ LIKELY ACTIVE |
| CCCast Corporation | Hibbing | MN | Primary Metal Manufacturing331511 | — | ◐ LIKELY ACTIVE |
| PAPacific Alloy Castings INC | South Gate | CA | Primary Metal Manufacturing331511 | — | ◐ LIKELY ACTIVE |
| BSBarber Steel Foundry Corporation | Rothbury | MI | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| CPCastwell Products INC | Skokie | IL | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| ECEnterprise Casting Corporation | Lewiston | ME | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| MPMetlcast Products Incorporated | Salina | KS | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| RFRusselloy Foundry INC | Durant | IA | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| TFTrumbull Foundry & Alloy | Niles | OH | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| 9G93063 - Grede LLC | Saint Cloud | MN | Primary Metal Manufacturing331511 | 100-499 | ◐ LIKELY ACTIVE |
| AFAcheson Foundry & Machine Works, INC. | Chattanooga | TN | Primary Metal Manufacturing331511 | — | ◐ LIKELY ACTIVE |
| BCBct Cast Products LLC | West Allis | WI | Primary Metal Manufacturing331511 | 20-99 | ◐ LIKELY ACTIVE |
| BFBoyertown Foundry Company | New Berlinville | PA | Primary Metal Manufacturing331511 | 20-99 | ◐ LIKELY ACTIVE |
| BNBrembro North America, Inc. | Homer | MI | Primary Metal Manufacturing331511 | 100-499 | ◐ LIKELY ACTIVE |
| CMCarolina Metal Castings #354 | Hardeeville | SC | Primary Metal Manufacturing331511 | — | ◐ LIKELY ACTIVE |
| CBClay & Bailey Mfg Company | Kansas City | MO | Primary Metal Manufacturing331511 | 20-99 | ◐ LIKELY ACTIVE |
| DFDakota Foundry, INC. | Webster | SD | Primary Metal Manufacturing331511 | — | ◐ LIKELY ACTIVE |
| DSDavis S #1 Facility | Dubberly | LA | Primary Metal Manufacturing331511 | — | ◐ LIKELY ACTIVE |
| DSDidion & Sons Foundry CO | St. Peters | MO | Primary Metal Manufacturing331511 | — | ◐ LIKELY ACTIVE |
| DIDonsco Inc Mount Joy Foundry | Mount Joy | PA | Primary Metal Manufacturing331511 | 100-499 | ◐ LIKELY ACTIVE |
| GIGeorgia Iron Works INC | Grovetown | GA | Primary Metal Manufacturing331511 | — | ◐ LIKELY ACTIVE |
| GLGreat Lakes Castings LLC | Ludington | MI | Primary Metal Manufacturing331511 | 100-499 | ◐ LIKELY ACTIVE |
| HFHallman Foundry | Sanford | NC | Primary Metal Manufacturing331511 | — | ◐ LIKELY ACTIVE |
| HMHamburg Mfg Inc/hamburg Plow Works Plt | Hamburg | PA | Primary Metal Manufacturing331511 | — | ◐ LIKELY ACTIVE |
| HMHamburg Mfg Inc/plow Works Finishing | Hamburg | PA | Primary Metal Manufacturing331511 | — | ◐ LIKELY ACTIVE |
| HMHL Mando America Corporation - G2 | Hogansville | GA | Primary Metal Manufacturing331511 | 100-499 | ◐ LIKELY ACTIVE |
| HFHodge Foundry | Greenville | PA | Primary Metal Manufacturing331511 | 20-99 | ◐ LIKELY ACTIVE |
| JDJohn Deere Foundry - Waterloo Facility | Waterloo | IA | Primary Metal Manufacturing331511 | — | ◐ LIKELY ACTIVE |