| OSOmaha Steel Castings CO | Omaha | NE | — | ◇ UNVERIFIED |
| OCOneida Casting Group | Oneida | NY | — | ◇ UNVERIFIED |
| OBOsc Builders | Pacific | MO | — | ◇ UNVERIFIED |
| OGOz Gedney Llc/shoemakersville Plt | Shoemakersville | PA | — | ◇ UNVERIFIED |
| PCPacific Car and Foundry CO | Renton | WA | — | ◇ UNVERIFIED |
| PHPacific Handy Cutter INC | Irvine | CA | — | ◇ UNVERIFIED |
| PSPacific Securities INC | Spokane | WA | — | ◇ UNVERIFIED |
| PSPacific Steel Casting Co-plant | Berkeley | CA | — | ◇ UNVERIFIED |
| PSPacific Steel Casting Co-plant #1 | Berkeley | CA | — | ◇ UNVERIFIED |
| PSPacific Steel Casting Co-plant #3 | Berkeley | CA | — | ◇ UNVERIFIED |
| PMPadnos Manufacturing INC | Grand Rapids | MI | — | ◇ UNVERIFIED |
| PEPa Equipment Rental | Turtle Creek | PA | — | ◇ UNVERIFIED |
| PPPa Precision Cast Pa/lebanon City Plt | Lebanon | PA | — | ◇ UNVERIFIED |
| PIParamelt Icd Warehouse | Muskegon | MI | — | ◇ UNVERIFIED |
| PEParamount Extrusions CO. | Paramount | CA | — | ◇ UNVERIFIED |
| PFParhen Foundry, INC. | Amory | MS | — | ◇ UNVERIFIED |
| PGParker Gear Pump Division | Youngstown | OH | — | ◇ UNVERIFIED |
| PIPatsy Iron Works INC. | Elmsford | NY | — | ◇ UNVERIFIED |
| PSPcc Structurals INC | Portland | OR | — | ◇ UNVERIFIED |
| PFPearce Foundry, INC. | Prairieville | LA | — | ◇ UNVERIFIED |
| PIPenatek Inds INC | Odessa | TX | — | ◇ UNVERIFIED |
| PCPenncast Corp/marietta | Marietta | PA | — | ◇ UNVERIFIED |
| PSPennsylvania Steel Fndy & Machine CO | Hamburg | PA | — | ◇ UNVERIFIED |
| PFPentair Flow Technologies, LLC - Ashland Casting Center | Ashland | OH | — | ◇ UNVERIFIED |
| PDPentz Design Pattern and Foundry INC | Duvall | WA | — | ◇ UNVERIFIED |
| PCPerm Cast LLC | Cynthiana | KY | — | ◇ UNVERIFIED |
| PDPeter Day | Portland | OR | — | ◇ UNVERIFIED |
| PFPioneer Foundry CO INC | Jackson | MI | — | ◇ UNVERIFIED |
| PPPipe Properties, LLC and Gateway View, LLC | Chattanooga | TN | — | ◇ UNVERIFIED |
| PPPiqua Power Plant | Piqua | OH | — | ◇ UNVERIFIED |
| PTPolich Tallix INC | Rock Tavern | NY | — | ◇ UNVERIFIED |
| PCPrecision Cast Products | Oakland | CA | — | ◇ UNVERIFIED |
| PMPrenatt Manufacturing, INC. | Pleasantville | PA | — | ◇ UNVERIFIED |
| PCPrime Cast INC | Beloit | WI | — | ◇ UNVERIFIED |
| PIPrimecast, Inc.(former) | South Beloit | IL | — | ◇ UNVERIFIED |
 Prl Industries INC | Lebanon | PA | — | ◇ UNVERIFIED |
| PPProcess Prototype INC | Romulus | MI | — | ◇ UNVERIFIED |
| PVPro V Enterprises | Dearborn | MI | — | ◇ UNVERIFIED |
 P.t. Armor, INC. | Fairfax | VA | — | ◇ UNVERIFIED |
| PCPumpworks Castings | Lufkin | TX | — | ◇ UNVERIFIED |
| PCPure Castings | Austin | TX | — | ◇ UNVERIFIED |
| QFQuantum Fuel Systems Technologies INC | Lake Forest | CA | — | ◇ UNVERIFIED |
| QCQuincy Castings, INC. | Quincy | OH | — | ◇ UNVERIFIED |
| RPR2 Properties, LLC | Waukesha | WI | — | ◇ UNVERIFIED |
| RSRacine Steel Castings Div | Racine | WI | — | ◇ UNVERIFIED |
| RTRadford Trading, LLC | Radford | VA | — | ◇ UNVERIFIED |
| RCRainbow Custom Woodworking | Alexandria | VA | — | ◇ UNVERIFIED |
| RMRainbow Muffler & Brake | Sandusky | OH | — | ◇ UNVERIFIED |
| RFRamirez Foundry | El Cajon | CA | — | ◇ UNVERIFIED |
| RDRangers Die Casting CO | Lynwood | CA | — | ◇ UNVERIFIED |
| RIRansom Ind Lp/macungie | Macungie | PA | — | ◇ UNVERIFIED |
| RPRayonier Performance Fibers LLC Marketing & Research Center | Jesup | GA | — | ◇ UNVERIFIED |
| RMReed Mfg/erie | Erie | PA | — | ◇ UNVERIFIED |
| RSReliable Steel Building Products INC | South Gate | CA | — | ◇ UNVERIFIED |
| RMRenaissance Manufacturing Group, LLC | Waukesha | WI | — | ◇ UNVERIFIED |
| RMReplacement Metal Castings Dba Carolina Metal Castings | Hardeeville | SC | — | ◇ UNVERIFIED |
| RTRevstone Transportation LLC | Vassar | MI | — | ◇ UNVERIFIED |
| RHR-hive Holdings, LLC | Kenosha | WI | — | ◇ UNVERIFIED |
| RCRichland Ctr Foundry CO (former) | Richland Center | WI | — | ◇ UNVERIFIED |
| RFRichmond Foundry | Richmond | TX | — | ◇ UNVERIFIED |
| RFRidge Foundry INC | San Leandro | CA | — | ◇ UNVERIFIED |
| RFRmg Foundry | Mishawaka | IN | — | ◇ UNVERIFIED |
| RMR M Masonry | Richmond | VA | — | ◇ UNVERIFIED |
| RFRobinson Foundry INC | Alexander City | AL | — | ◇ UNVERIFIED |
| RCRockbridge Castings | Rockbridge | IL | — | ◇ UNVERIFIED |
| RIRock Island Arsenal | Rock Island | IL | — | ◇ UNVERIFIED |
| RERoemer Electric Steel Foundry | Longview | WA | — | ◇ UNVERIFIED |
| RIRoper Industries INC | Denver | CO | — | ◇ UNVERIFIED |
| RCRoss Cast Metals | Lancaster | OH | — | ◇ UNVERIFIED |
| RSRoss Sand Casting Industries, Inc., Plan | Winchester | IN | — | ◇ UNVERIFIED |
| RSRoss Sand Casting Industry, LLC | Orrville | OH | — | ◇ UNVERIFIED |
| RSRothbury Steel INC | Rothbury | MI | — | ◇ UNVERIFIED |
| SSSamuel Son & CO INC | Portland | OR | — | ◇ UNVERIFIED |
| SCSanders CO INC | Elizabeth City | NC | — | ◇ UNVERIFIED |
| SISandwich Iron Foundry | Plano | IL | — | ◇ UNVERIFIED |
| SMSather Mfg CO INC | Everett | WA | — | ◇ UNVERIFIED |
 Schuff Steel Company | Salt Lake City | UT | — | ◇ UNVERIFIED |
| SFSchwarb Foundry | Warren | MI | — | ◇ UNVERIFIED |
| SISchwarb Industries INC | Troy | MI | — | ◇ UNVERIFIED |
| SEScott Engineering and Procurement, INC. (1431004456) | Loveland | OH | — | ◇ UNVERIFIED |
| SFSeaboard Foundry | Johnston, Town of | RI | — | ◇ UNVERIFIED |
| SBSequoia Brick | Lindsay | CA | — | ◇ UNVERIFIED |
| SBService Brass & Aluminum Foundry, INC. | Wichita | KS | — | ◇ UNVERIFIED |
| SESewer Equipment CO. of Florida, INC. | New Smyrna Beach | FL | — | ◇ UNVERIFIED |
| SFShelco Foundries Div of Gnutti Cado USA | Jacksonville | AL | — | ◇ UNVERIFIED |
| SFSherman Foundry | Sherman | TX | — | ◇ UNVERIFIED |
| SMSimonz Machine Dba Hyve Technologies | San Diego | CA | — | ◇ UNVERIFIED |
| SSSivyer Steel Castings LLC | Bettendorf | IA | — | ◇ UNVERIFIED |
| SSSivyer Steel CORP | Bettendorf | IA | — | ◇ UNVERIFIED |
| SSSivyer Steel Corporation | Bettendorf | IA | — | ◇ UNVERIFIED |
| SMSkagit Manufacturing Site | Sedro Woolley | WA | — | ◇ UNVERIFIED |
| SHSlack Horner Foundry | Longmont | CO | — | ◇ UNVERIFIED |
| SMSlinger Manufacturing CO INC | Slinger | WI | — | ◇ UNVERIFIED |
| SMSlinger Mfg CO INC Plant 1 | Slinger | WI | — | ◇ UNVERIFIED |
| SCSmith Castings INC | Kingsford | MI | — | ◇ UNVERIFIED |
| SCSmith Castings LLC | Kingsford | MI | — | ◇ UNVERIFIED |
| SFSmith Foundry Company | Minneapolis | MN | — | ◇ UNVERIFIED |
| SCSomerset Consolidate/somerset | Somerset | PA | — | ◇ UNVERIFIED |
| SSSo Safe Equipment | Motley | MN | — | ◇ UNVERIFIED |
| SBSouth Bay Foundry INC | Santee | CA | — | ◇ UNVERIFIED |
