| ICIntermet Corporation Radford | Radford | VA | — | ◇ UNVERIFIED |
| IDIntermet Decatur Foundry | Decatur | IL | — | ◇ UNVERIFIED |
| IHIntermet Havana Foundry | Havana | IL | — | ◇ UNVERIFIED |
| IIIntermet Ironton Foundry | Ironton | OH | — | ◇ UNVERIFIED |
| IAInternational Agile Manufacturing LLC | Statesboro | GA | — | ◇ UNVERIFIED |
| ICInterstate Castings | Indianapolis | IN | — | ◇ UNVERIFIED |
| IRIron Rod | Los Gatos | CA | — | ◇ UNVERIFIED |
| JCJerry Carroll Machining INC Dba Electrocut-pacific | San Carlos | CA | — | ◇ UNVERIFIED |
| JCJ.E.T. Corporation | Bridgeport | CT | — | ◇ UNVERIFIED |
| JBJohn Bouchard & Sons (closed) | Nashville | TN | — | ◇ UNVERIFIED |
| JDJohn Deere Foundry - Waterloo Facility | Waterloo | IA | — | ◇ UNVERIFIED |
| JSJohnstown Specialty Casting/johnstown Foundry | Johnstown | PA | — | ◇ UNVERIFIED |
| JRJots Rentals | Longview | TX | — | ◇ UNVERIFIED |
| JCJp Castings INC Dba Specialty Castings | Springport | MI | — | ◇ UNVERIFIED |
| JRJ R Hoe & Sons INC | Middlesboro | KY | — | ◇ UNVERIFIED |
| KHKempf Holdings, LLC | Omaha | NE | — | ◇ UNVERIFIED |
| KAKeys Aluminum | La Mirada | CA | — | ◇ UNVERIFIED |
| KFKits Foundry and Machine, INC. | Shelley | ID | — | ◇ UNVERIFIED |
| KFKnapp Foundry Company INC (1677010014) | Akron | OH | — | ◇ UNVERIFIED |
| KPK P Iron Foundry INC | Fresno | CA | — | ◇ UNVERIFIED |
| KIKramer International INC | Shelby Township | MI | — | ◇ UNVERIFIED |
| KFKulp Foundry INC | Wind Gap | PA | — | ◇ UNVERIFIED |
| LFLagrange Foundry-lagrange | La Grange | MO | — | ◇ UNVERIFIED |
| LFLanam Foundry | New Martinsville | WV | — | ◇ UNVERIFIED |
| LMLancaster Malleable /manheim-keller | Lancaster | PA | — | ◇ UNVERIFIED |
| LPLa Porte Technologies LLC | La Porte | IN | — | ◇ UNVERIFIED |
| LFLebaron Foundry INC | Brockton, City of | MA | — | ◇ UNVERIFIED |
| LFLeed Foundry Inc/st Clair | Saint Clair | PA | — | ◇ UNVERIFIED |
| LCLiberty Casting Company-kip Moldline (0333010042) | Kenton | OH | — | ◇ UNVERIFIED |
| LILkr INC Dba Raycon Industries | Brea | CA | — | ◇ UNVERIFIED |
| LFLufkin Foundry & Power Transmission Divisions | Lufkin | TX | — | ◇ UNVERIFIED |
| LFLynchburg Foundry Llc, D/b/a Archer Creek Foundry | Lynchburg | VA | — | ◇ UNVERIFIED |
| MFMacaulay Foundry INC | Berkeley | CA | — | ◇ UNVERIFIED |
 Machineworks Manufacturing | Chatsworth | CA | — | ◇ UNVERIFIED |
| MMMagnus Metal INC | East Peoria | IL | — | ◇ UNVERIFIED |
| MMManchester Metals | North Manchester | IN | — | ◇ UNVERIFIED |
| MAManhole Adjusting Contractors | Monterey Park | CA | — | ◇ UNVERIFIED |
| MMMarcellus Metalcasters INC | Marcellus | MI | — | ◇ UNVERIFIED |
| MIMas Iron CO | Los Angeles | CA | — | ◇ UNVERIFIED |
| MFMay Foundry & Machine CO | Slc | UT | — | ◇ UNVERIFIED |
| MMcwane | Tyler | TX | — | ◇ UNVERIFIED |
| MCMcwane Cast Iron Pipe CO. | Birmingham | AL | — | ◇ UNVERIFIED |
| MCMcwane Cast Iron Pipe CO. | Birmingham | AL | — | ◇ UNVERIFIED |
| MIMcwane, INC. | Oakland | CA | — | ◇ UNVERIFIED |
| MSMetaldyne Sinterforged Products LLC | North Vernon | IN | — | ◇ UNVERIFIED |
| MPMetalico Pgh INC | Pittsburgh | PA | — | ◇ UNVERIFIED |
| MTMetal Technologies Dba Ravenna Ductile Iron Plant | Ravenna | MI | — | ◇ UNVERIFIED |
| MLMetavation LLC Vassar Plt | Vassar | MI | — | ◇ UNVERIFIED |
| MMMicro Metals | Richmond | CA | — | ◇ UNVERIFIED |
| MMMidwest Metallurgical Laboratory INC | Marshall | MI | — | ◇ UNVERIFIED |
