| CWClow Water Systems Company | Coshocton | OH | Primary Metal Manufacturing331511 | — | ◐ LIKELY ACTIVE |
| CCCol-pump Company, INC. (0215010001) | Columbiana | OH | Primary Metal Manufacturing331511 | — | ◐ LIKELY ACTIVE |
| GDGm Defiance Casting Operations | Defiance | OH | Primary Metal Manufacturing331511 | — | ◐ LIKELY ACTIVE |
| MCMueller CO | Decatur | IL | Primary Metal Manufacturing331511 | — | ◐ LIKELY ACTIVE |
| NFNorthern Foundry | Hibbing | MN | 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 |
| 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 |
| TPTyler Pipe | Tyler | TX | Primary Metal Manufacturing331511 | — | ◐ LIKELY ACTIVE |
| UCUnicast Co/boyertown | Boyertown | PA | Primary Metal Manufacturing331511 | — | ◐ LIKELY ACTIVE |
| WMWard Mfg Plt 1 & 2 | Blossburg | PA | Primary Metal Manufacturing331511 | — | ◐ LIKELY ACTIVE |
| WOWhemco - Ohio Foundry INC (0302020023) | Lima | OH | 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 |
Mendenhall Industries CORP | Myrtle Beach | SC | Primary Metal Manufacturing331511 | — | ◐ LIKELY ACTIVE |
| AFAcheson Foundry & Machine Works, INC. | Chattanooga | TN | Primary Metal Manufacturing331511 | — | ◐ LIKELY ACTIVE |
| BFBadger Foundry Company | Winona | MN | Primary Metal Manufacturing331511 | 20-99 | ◐ 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 |
| CCCadillac Casting, INC (b2178) | Cadillac | MI | Primary Metal Manufacturing331511 | 100-499 | ◐ LIKELY ACTIVE |
| CDCharter Dura-bar, INC. | Woodstock | IL | Primary Metal Manufacturing331511 | — | ◐ LIKELY ACTIVE |
| CBClay & Bailey Mfg Company | Kansas City | MO | Primary Metal Manufacturing331511 | 20-99 | ◐ LIKELY ACTIVE |
| CCCullman Casting Corporation | Cullman | AL | Primary Metal Manufacturing331511 | — | ◐ LIKELY ACTIVE |
| DFDakota Foundry, INC. | Webster | SD | Primary Metal Manufacturing331511 | — | ◐ LIKELY ACTIVE |
| DSDidion & Sons Foundry CO | Saint Peters | MO | Primary Metal Manufacturing331511 | — | ◐ LIKELY ACTIVE |
| DPDiversified Production LLC - Davis S #8 Lease | Dubberly | LA | Primary Metal Manufacturing331511 | — | ◐ LIKELY ACTIVE |
| DIDonsco Inc Mount Joy Foundry | Mount Joy | PA | Primary Metal Manufacturing331511 | 100-499 | ◐ LIKELY ACTIVE |
| ECEsco Corporation | Portland | OR | Primary Metal Manufacturing331511 | — | ◐ LIKELY ACTIVE |
| FIFranklin Iron Works, INC. | Thorsby | AL | Primary Metal Manufacturing331511 | — | ◐ LIKELY ACTIVE |
| GIGeorgia Iron Works INC | Grovetown | GA | Primary Metal Manufacturing331511 | — | ◐ LIKELY ACTIVE |
| GLGrede LLC | Saint Cloud | MN | 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 |
| ICImperial Casting Company, INC. | Florence | AL | Primary Metal Manufacturing331511 | — | ◐ LIKELY ACTIVE |
| JDJohn Deere Foundry - Waterloo Facility | Waterloo | IA | Primary Metal Manufacturing331511 | — | ◐ LIKELY ACTIVE |
| JRJ R Hoe & Sons INC | Middlesboro | KY | Primary Metal Manufacturing331511 | — | ◐ LIKELY ACTIVE |
| LFLanam Foundry | New Martinsville | WV | Primary Metal Manufacturing331511 | — | ◐ LIKELY ACTIVE |
| MDMcwane Ductile | Coshocton | OH | Primary Metal Manufacturing331511 | 500+ | ◐ LIKELY ACTIVE |
| MDMcwane Ductile | Provo | UT | Primary Metal Manufacturing331511 | 100-499 | ◐ LIKELY ACTIVE |
| MFMid-City Foundry Co. - Milwaukee Division | Milwaukee | WI | Primary Metal Manufacturing331510 | 20-99 | ◐ LIKELY ACTIVE |
| MMMidwest Manufacturing & Logistics LLC | Minster | OH | Primary Metal Manufacturing331511 | 20-99 | ◐ LIKELY ACTIVE |
| MMMontague Machine CO | Montague (turners Falls) | MA | Primary Metal Manufacturing331511 | — | ◐ LIKELY ACTIVE |
| NANorth American Royalties INC. Wheland Automotive Industries | Chattanooga | TN | Primary Metal Manufacturing331511 | — | ◐ LIKELY ACTIVE |
| OKO. K. Foundry Company, INC. | Richmond | VA | Primary Metal Manufacturing331511 | — | ◐ LIKELY ACTIVE |
| OFOlympic Foundry INC | Seattle | WA | Primary Metal Manufacturing331511 | — | ◐ LIKELY ACTIVE |