| PNPermasteelisa North America | Harrison | NJ | — | ◇ UNVERIFIED |
| PIPetersen Industries, INC. | Lake Wales | FL | — | ◇ UNVERIFIED |
| PMPetersen Metals | Hudson | FL | — | ◇ UNVERIFIED |
| PMPhilipp Mfg CO INC | Easthampton | MA | — | ◇ UNVERIFIED |
| PMP&h Manufacturing | Shelbyville | IL | — | ◇ UNVERIFIED |
| PHP & H Mining Equipment | Milwaukee | WI | — | ◇ UNVERIFIED |
| PMPhoenix Manufacturing CO | Memphis | TN | — | ◇ UNVERIFIED |
| PMPhoenix Metalcraft | Phoenix | AZ | — | ◇ UNVERIFIED |
| PVPinson Valley Fabricators INC | Birmingham, Al | AL | — | ◇ UNVERIFIED |
| PAPioneer Aerospace CORP | Milton | FL | — | ◇ UNVERIFIED |
| PCPioneer Consolidated | North Oxford | MA | — | ◇ UNVERIFIED |
| PMPitonyak Machinery CORP | Carlisle | AR | — | ◇ UNVERIFIED |
| PTPlaya Tool & Marine INC | Santa Ana | CA | — | ◇ UNVERIFIED |
| PSPneu-mech Systems Manufacturing INC | Statesville | NC | — | ◇ UNVERIFIED |
| PSPortersville Sales & Testing/portersville | Portersville | PA | — | ◇ UNVERIFIED |
| PWPorter Welding INC | Zanesville | OH | — | ◇ UNVERIFIED |
| PAPostle Aluminum (p0448) | Cassopolis | MI | — | ◇ UNVERIFIED |
| PRPowder River INC | Provo | UT | — | ◇ UNVERIFIED |
 Precision Build Solutions, LLC | Tampa | FL | — | ◇ UNVERIFIED |
| PHPrecision Heat Treating | Montebello | CA | — | ◇ UNVERIFIED |
| PIPreferred Industrial Coatings LLC | Houma | LA | — | ◇ UNVERIFIED |
| PPPremier Plant Services INC | Sapulpa | OK | — | ◇ UNVERIFIED |
| PCPrime Coatings INC | Amelia | LA | — | ◇ UNVERIFIED |
| PFProductivity Fabricators, INC. | Richmond | IN | — | ◇ UNVERIFIED |
| PFPro Fab Tech LLC | Azusa | CA | — | ◇ UNVERIFIED |
| PRProgress Rail Services CORP | Louisville | KY | — | ◇ UNVERIFIED |
| PMPungo Machine Shop, INC. | Pantego | NC | — | ◇ UNVERIFIED |
| PCPurdy CO | Burnham | IL | — | ◇ UNVERIFIED |
| QPQsi Plant #2 | Dothan | AL | — | ◇ UNVERIFIED |
| QOQuality One Steel Design | Shelbyville | KY | — | ◇ UNVERIFIED |
| QPQuality Plus Manufacturing INC | Oelwein | IA | — | ◇ UNVERIFIED |
| QFQuicksteel Fab INC | Johnston | IA | — | ◇ UNVERIFIED |
| QJQuincy Joist Company | Quincy | FL | — | ◇ UNVERIFIED |
| RMRam Machine Tooling INC | Picayune | MS | — | ◇ UNVERIFIED |
| RHRanch Hand Beeville | Beeville | TX | — | ◇ UNVERIFIED |
| RFRanco Fertiservice INC | Sioux Rapids | IA | — | ◇ UNVERIFIED |
| RIRatliff Industries | Lumberton | TX | — | ◇ UNVERIFIED |
| RIRayes Inc, Dba Wheelchairs of Kansas | Hays | KS | — | ◇ UNVERIFIED |
| RIRaysteel INC | Albuquerque | NM | — | ◇ UNVERIFIED |
| RIRds Industrial INC | Cocoa | FL | — | ◇ UNVERIFIED |
| RCRecycle City INC | Clifton City | NJ | — | ◇ UNVERIFIED |
| RSRedi Services LLC - Metal Parts Coating | Platteville | CO | — | ◇ UNVERIFIED |
| RRenaissance | Roanoke | VA | — | ◇ UNVERIFIED |
| RSResteel Supply Company, INC. | Warwick | RI | — | ◇ UNVERIFIED |
| RGR G Applegate Steel Company Incorporated | Saratoga | IN | — | ◇ UNVERIFIED |
| RSRichardson Steel INC | Spring Valley | CA | — | ◇ UNVERIFIED |
| RCRimpull Corporation (stormwater) | Olathe | KS | — | ◇ UNVERIFIED |
| RTRipon Truck Repair & Equipment, LLC | Pickett | WI | — | ◇ UNVERIFIED |
| RARippel Architectural Metals INC | Chicago | IL | — | ◇ UNVERIFIED |
| RRoadmaster | Portland | OR | — | ◇ UNVERIFIED |
