 Oil City Iron Works INC | Corsicana | TX | — | ◇ UNVERIFIED |
| OPOk Pipe & Fittings,inc. | Kingwood | TX | — | ◇ UNVERIFIED |
| OSOlympic Steel - Ps&w | Siler City | NC | — | ◇ UNVERIFIED |
| OAOmar Associates, LLC | Attica | OH | — | ◇ UNVERIFIED |
| OTOmk Tube Miller Rd 2 | Houston | TX | — | ◇ UNVERIFIED |
| OROmron Robotics and Safety Technologies | Pleasanton | CA | — | ◇ UNVERIFIED |
| OCOneida Casting Group | Oneida | NY | — | ◇ UNVERIFIED |
| OEOrion Enterprises INC | Kansas City | KS | — | ◇ UNVERIFIED |
| OBOsc Builders | Pacific | MO | — | ◇ UNVERIFIED |
| OOsmonics | Escondido | CA | — | ◇ UNVERIFIED |
| OBOttenbergs Barks | Washington | DC | — | ◇ UNVERIFIED |
| OGOz Gedney Llc/shoemakersville Plt | Shoemakersville | PA | — | ◇ UNVERIFIED |
| PHPacific Handy Cutter INC | Irvine | CA | — | ◇ UNVERIFIED |
| PSPacific Securities INC | Spokane | WA | — | ◇ UNVERIFIED |
| POPact One Llc/ W Norriton Twp | Trooper | PA | — | ◇ UNVERIFIED |
| PMPadnos Manufacturing INC | Grand Rapids | MI | — | ◇ UNVERIFIED |
| PTPall Trinity Micro | Cortland | NY | — | ◇ UNVERIFIED |
| PPPa Precision Cast Pa/lebanon City Plt | Lebanon | PA | — | ◇ UNVERIFIED |
| PWParallel Welding Services, LLC | Saint Gabriel | LA | — | ◇ 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 |
| PCParsons CO INC | Goodfield | IL | — | ◇ UNVERIFIED |
| PSPatriot Stainless, INC. | Zanesville | OH | — | ◇ UNVERIFIED |
| PPPaulsen Pipe, LLC | South Holland | IL | — | ◇ UNVERIFIED |
| PIPenatek Inds INC | Odessa | TX | — | ◇ UNVERIFIED |
| PFPentair Flow Technologies, LLC - Ashland Casting Center | Ashland | OH | — | ◇ UNVERIFIED |
| PTPeoria Tube Forming CORP | East Peoria | IL | — | ◇ UNVERIFIED |
| PPPerfect Pipe & Supply CORP. | Elgin | IL | — | ◇ UNVERIFIED |
| PCPerformance Contractors, INC | Plaquemine | LA | — | ◇ UNVERIFIED |
| PCPerformance Contractors, INC. - Mobile Fabrication Facility | Theodore | AL | — | ◇ UNVERIFIED |
| PCPerm Cast LLC | Cynthiana | KY | — | ◇ UNVERIFIED |
| PDPeter Day | Portland | OR | — | ◇ UNVERIFIED |
| PSPetro Service & Supply CO INC | Houston | TX | — | ◇ UNVERIFIED |
| PPetrotech | Tampa | FL | — | ◇ UNVERIFIED |
| PHPG Holdings LLC | Alexander | ND | — | ◇ UNVERIFIED |
| POPin Oak Facility LLC | Katy | TX | — | ◇ UNVERIFIED |
| PFPioneer Foundry CO INC | Jackson | MI | — | ◇ UNVERIFIED |
| PFPipe & Fabrication INC | Camden | SC | — | ◇ UNVERIFIED |
| PWPipeline Works, INC. | El Monte | CA | — | ◇ UNVERIFIED |
| PPPipe Properties, LLC and Gateway View, LLC | Chattanooga | TN | — | ◇ UNVERIFIED |
| PSPiping Solutions INC. | Bridgewater | NJ | — | ◇ UNVERIFIED |
| PPPiqua Power Plant | Piqua | OH | — | ◇ UNVERIFIED |
| PEPittman Engineering Inc. | Alliance | OH | — | ◇ UNVERIFIED |
| PAPlant and Flanged Equipment LLC | Blaine | MN | — | ◇ UNVERIFIED |
| PUPlasson USA | Houston | TX | — | ◇ UNVERIFIED |
 Point to Point Consulting, Inc. | San Antonio | TX | — | ◇ UNVERIFIED |
| PSPointwest Sales & Marketing LLC | Saint Paul | MN | — | ◇ UNVERIFIED |
| PPPowerseal Pipeline Products Corporation | Wichita Falls | TX | — | ◇ UNVERIFIED |
| PPPowertrain Products, INC. | Stevensville | MD | — | ◇ UNVERIFIED |
| PTPower Trip Rentals | Compton | CA | — | ◇ UNVERIFIED |
| PTPpm Technologies Holdings, LLC | Sherwood | OR | — | ◇ UNVERIFIED |
| PIPrater Industries INC | Bolingbrook | IL | — | ◇ UNVERIFIED |
| PIPrater Industries INC | Cicero | IL | — | ◇ UNVERIFIED |
| PCPrecision Cast Products | Oakland | CA | — | ◇ UNVERIFIED |
| PCPrecision Cutoff, LLC | Holland | OH | — | ◇ UNVERIFIED |
| PIPrecision Industrial Piping, LLC | Batavia | OH | — | ◇ UNVERIFIED |
| PPPrecision Pipe & Vessel, LLC | Commerce City | CO | — | ◇ UNVERIFIED |
| PPPrecision Piping and Fabrication LLC | Freeport | IL | — | ◇ UNVERIFIED |
| PSPrecision Spiral Pipe CO | Burleson | TX | — | ◇ UNVERIFIED |
| PTPrecision Tube | Richmond | KY | — | ◇ UNVERIFIED |
| PPPremium Produce, Inc. | Alamo | CA | — | ◇ UNVERIFIED |
| PSPrepress Supply INC | Fountain Valley | CA | — | ◇ UNVERIFIED |
| PCPrime Cast INC | Beloit | WI | — | ◇ UNVERIFIED |
| PIPrimecast, Inc.(former) | South Beloit | IL | — | ◇ UNVERIFIED |
| PTPrivatizer Technologies LLC | Dayton | OH | — | ◇ UNVERIFIED |
| PBProbat Burns | Vernon Hills | IL | — | ◇ UNVERIFIED |
| PPProcess Prototype INC | Romulus | MI | — | ◇ UNVERIFIED |
| PSProduct Solutions Inc. | Anaheim | CA | — | ◇ UNVERIFIED |
| PEPrompt Engineering Systems | Wathena | KS | — | ◇ UNVERIFIED |
| PTProvisur Technologies | Montgomery | IL | — | ◇ UNVERIFIED |
| PCPure Castings | Austin | TX | — | ◇ UNVERIFIED |
| PRPyrotect Racing Cells | Redmond | OR | — | ◇ UNVERIFIED |
| QFQuality Fabricators LLC | Barrington | NH | — | ◇ UNVERIFIED |
| QPQuality Precast Solutions LLC | Cape Coral | FL | — | ◇ UNVERIFIED |
| QMQuest Manufacturing, Inc. | Orchard Park | NY | — | ◇ UNVERIFIED |
| QCQuincy Castings, INC. | Quincy | OH | — | ◇ UNVERIFIED |
| RTRadford Trading, LLC | Radford | VA | — | ◇ UNVERIFIED |
| RMRainbow Muffler & Brake | Sandusky | OH | — | ◇ UNVERIFIED |
| RLRalph Lauren | Cabazon | CA | — | ◇ UNVERIFIED |
 Rameking Company LLC | Pickerington | OH | — | ◇ UNVERIFIED |
| RFRam Fiberglass INC | Chino | CA | — | ◇ UNVERIFIED |
| RIRansco Industries | Oxnard | CA | — | ◇ UNVERIFIED |
| RIRansom Ind Lp/macungie | Macungie | PA | — | ◇ UNVERIFIED |
| RPRayonier Performance Fibers LLC Marketing & Research Center | Jesup | GA | — | ◇ UNVERIFIED |
| RMRbm Mfg. Co., INC. | Pomona | CA | — | ◇ UNVERIFIED |
| RMR-D MFG., Inc. | Old Saybrook | CT | — | ◇ UNVERIFIED |
| RWRed Wing CO /california Div | San Jose | CA | — | ◇ UNVERIFIED |
| RMReed Mfg/erie | Erie | PA | — | ◇ UNVERIFIED |
| RRReflex Robotics | Brooklyn | NY | — | ◇ UNVERIFIED |
| RMRenaissance Manufacturing Group, LLC | Waukesha | WI | — | ◇ UNVERIFIED |
| RIRendeq, Inc. | Jordan | MN | — | ◇ UNVERIFIED |
| RMReplacement Metal Castings Dba Carolina Metal Castings | Hardeeville | SC | — | ◇ UNVERIFIED |
| RCRepligen Corporation | Marlborough | MA | — | ◇ UNVERIFIED |
| RCReserva Coffee Roasters LLC | Mcallen | TX | — | ◇ UNVERIFIED |
| RTRevstone Transportation LLC | Vassar | MI | — | ◇ UNVERIFIED |
| RIRHP Investments LLC | Wausau | WI | — | ◇ UNVERIFIED |
| RCRichland Ctr Foundry CO (former) | Richland Center | WI | — | ◇ UNVERIFIED |
| RFRidge Foundry INC | San Leandro | CA | — | ◇ UNVERIFIED |
