| OAOmniduct Az, LLC | Phoenix | AZ | — | ◇ UNVERIFIED |
| OOmnimax | Gridley | IL | — | ◇ UNVERIFIED |
| OIOmnimax International, INC. | Ivyland | PA | — | ◇ UNVERIFIED |
| OIOmnimax International, LLC Dba Millennium Metals | Jacksonville | FL | — | ◇ UNVERIFIED |
| OMOneto Metal Products CORP | Sacramento | CA | — | ◇ UNVERIFIED |
| OSOney Sheetmetal INC | Fort Myers | FL | — | ◇ UNVERIFIED |
 On The Edge MFG, Inc | Kittanning | PA | — | ◇ UNVERIFIED |
| OSOrange Steel Roofing Products | Orange | VA | — | ◇ UNVERIFIED |
| OSOreland Sheet Metal Inc | Huntingdon Valley | PA | — | ◇ UNVERIFIED |
| OWO W Hubbell & Sons | New York Mills | NY | — | ◇ UNVERIFIED |
| PAPacific Award Metals INC | Baldwin Park | CA | — | ◇ UNVERIFIED |
| PDPacific Duct INC | Montclair | CA | — | ◇ UNVERIFIED |
| PMPacific Metal Fab LLC | Eugene | OR | — | ◇ UNVERIFIED |
| PMPacific Metal Fabricators | Stockton | CA | — | ◇ UNVERIFIED |
| PSPalatka Sheet Metal, INC. | Palatka | FL | — | ◇ UNVERIFIED |
| PMPalex Metals INC | Santa Clara | CA | — | ◇ UNVERIFIED |
| PMPalladino Metal Fabrication, INC. | Pottstown | PA | — | ◇ UNVERIFIED |
| PMPan Man, LLC | Lake Worth Beach | FL | — | ◇ UNVERIFIED |
| PDParamount Duct and Vent Cleaning LCC | Red Lodge | MT | — | ◇ UNVERIFIED |
| PPParis Precision Products | Paso Robles | CA | — | ◇ UNVERIFIED |
| P2Park 295 Building C | Jacksonville | FL | — | ◇ UNVERIFIED |
| PBParker Boiler CO. | Commerce | CA | — | ◇ UNVERIFIED |
| PHParker Hannifin CORP | Deerwood | MN | — | ◇ UNVERIFIED |
| PFParma Fabrication LLC | Parma | MI | — | ◇ UNVERIFIED |
| PMParrotts Metal INC | Merlin | OR | — | ◇ UNVERIFIED |
| PCParts Cleaning Technologies | Bowling Green | KY | — | ◇ UNVERIFIED |
| PSPathfinder Systems INC | Kansas City | MO | — | ◇ UNVERIFIED |
| PMPaulette Mitchell | Lancaster | CA | — | ◇ UNVERIFIED |
| PIPci Industries LLC Dba Pottorff | Montebello | CA | — | ◇ UNVERIFIED |
| PPcm | Red Bluff | CA | — | ◇ UNVERIFIED |
| PSPdm Steel | Fresno | CA | — | ◇ UNVERIFIED |
| PCPeak Custom Fabrication, INC. | Colorado Springs | CO | — | ◇ UNVERIFIED |
| PHPeck Hannaford and Briggs Company | Newport | KY | — | ◇ UNVERIFIED |
| PSPeconic Sheet Metal, LLC | Quogue | NY | — | ◇ UNVERIFIED |
| PIPeerless Industries INC | Roseville | MN | — | ◇ UNVERIFIED |
| PPPeko Precision Products Sheet Metal Division | Rochester | NY | — | ◇ UNVERIFIED |
| PTPennmark Technologies Corporation | Dallas | PA | — | ◇ UNVERIFIED |
| PSPenny Sheet Metal, L.l.c. | Broken Arrow | OK | — | ◇ UNVERIFIED |
| PMPensacola Metal Fabrication, INC. | Pensacola | FL | — | ◇ UNVERIFIED |
| PTPerfect Temperature Control, INC. Dba Fab-rite Sheet Metal | Des Plaines | IL | — | ◇ UNVERIFIED |
| PPPerformance Precision Sheet Metal LLC | Reno | NV | — | ◇ UNVERIFIED |
| PTPerry Tool & Die CO. | Broomfield | CO | — | ◇ UNVERIFIED |
| PSPersonnel Staffing Group, LLC | Santa Clarita | CA | — | ◇ UNVERIFIED |
| PBPesznecker Brothers | Clackamas | OR | — | ◇ UNVERIFIED |
| PAPetersen Aluminum Corporation | Fridley | MN | — | ◇ UNVERIFIED |
| PLP-fab, LLC | Jersey Shore | PA | — | ◇ UNVERIFIED |
| PIP.g.l. Industries, INC. | Swansea | MA | — | ◇ UNVERIFIED |
| POPhil Osterkamp | Grand Bay | AL | — | ◇ UNVERIFIED |
| PMPhoenix Metallics | Phoenix | AZ | — | ◇ UNVERIFIED |
| PMPhoenix Metals Company | O Fallon | MO | — | ◇ UNVERIFIED |
| PSPhoenix Steel INC. | Cleveland | OH | — | ◇ UNVERIFIED |
| PCPickwick Company | Cedar Rapids | IA | — | ◇ UNVERIFIED |
| PTPike Tool and Grinding, INC. | Colorado Springs | CO | — | ◇ UNVERIFIED |
| PMPinnacle Manufacturing | Morgan Hill | CA | — | ◇ UNVERIFIED |
| PAPiping Accessories INC | Beaumont | TX | — | ◇ UNVERIFIED |
| PMPlant Maintenance Service Corporation | Memphis | TN | — | ◇ UNVERIFIED |
| PBPlouffe's Boiler and Mechanical Service INC. | Middlebury | VT | — | ◇ UNVERIFIED |
| PFPlyco Foundation Vents INC | Waterford | CA | — | ◇ UNVERIFIED |
| PMPneumafil Metals Corporation | Charlotte | NC | — | ◇ UNVERIFIED |
| PIPoppe INC. | Hickory | NC | — | ◇ UNVERIFIED |
| PTPorter Tire Center INC | Olive Hill | KY | — | ◇ UNVERIFIED |
| POPort of Bremerton Wilkins Distributing | Port Orchard | WA | — | ◇ UNVERIFIED |
| PCPositech CORP. | Blue Ash | OH | — | ◇ UNVERIFIED |
| PSPovolny Specialties INC | South Saint Paul | MN | — | ◇ UNVERIFIED |
| PRPowder Ridge Properties, LLC | Sacramento | CA | — | ◇ UNVERIFIED |
| PEPowerhouse Equipment | Gastonia | NC | — | ◇ UNVERIFIED |
| PPPower Products and Engineering, LLC | Trenton | NJ | — | ◇ UNVERIFIED |
| PSPrairie State Industries | Carpentersville | IL | — | ◇ UNVERIFIED |
| PBPrecision Blend Gases, INC. | Dickinson | TX | — | ◇ UNVERIFIED |
| PFPrecision Fabricators LLC | Seattle | WA | — | ◇ UNVERIFIED |
| PMPrecision Machine | Lodi | CA | — | ◇ UNVERIFIED |
| PMPrecision Metal Fab, INC. | Milton | WI | — | ◇ UNVERIFIED |
| PMPrecision Metal Mfg | Northglenn | CO | — | ◇ UNVERIFIED |
 Precision Metal Products, INC. | Addison | IL | — | ◇ UNVERIFIED |
| PMPrecision Metal Works INC | Louisville | KY | — | ◇ UNVERIFIED |
| PMPrecision Micro Components | Redwood City | CA | — | ◇ UNVERIFIED |
| PSPrecision Sheet Metal Design LLC | Hillsboro | OR | — | ◇ UNVERIFIED |
| PSPrecision Steel Products, INC | Los Angeles | CA | — | ◇ UNVERIFIED |
 Precision Tool Die & Machine CO Dba Nth Works | Louisville | KY | — | ◇ UNVERIFIED |
| PWPreferred Welding INC | Otsego | MN | — | ◇ UNVERIFIED |
| PIPremetco, INC. | Auburn | WA | — | ◇ UNVERIFIED |
| PMPremiere Metal INC. | Suwanee | GA | — | ◇ UNVERIFIED |
| PEPremier Enclosure System INC | Ontario | CA | — | ◇ UNVERIFIED |
| PMPrescott Metal | Biddeford | ME | — | ◇ UNVERIFIED |
| PIPride Industries | Fort Campbell | KY | — | ◇ UNVERIFIED |
| PIPrince Industries INC. | Batavia | IL | — | ◇ UNVERIFIED |
 Prism Aerospace | Corona | CA | — | ◇ UNVERIFIED |
| PGProaxis Group | West Lafayette | IN | — | ◇ UNVERIFIED |
| PIProdex, INC. | Red Hill | PA | — | ◇ UNVERIFIED |
| PIProduct Integration & Manufacturing INC. | Rochester | NY | — | ◇ UNVERIFIED |
| PMProfab Metal Products, INC | Lynn | MA | — | ◇ UNVERIFIED |
| PMProgressive Manufacturing LLC | Fremont | MI | — | ◇ UNVERIFIED |
| PMProgress Manufacturing Company, LLC | Union City | IN | — | ◇ UNVERIFIED |
| PMPro Metals, LLC | Kansas City | MO | — | ◇ UNVERIFIED |
| PMPro Metal Works, INC. | De Forest | WI | — | ◇ UNVERIFIED |
| PSPromet Steel INC. | Chicago | IL | — | ◇ UNVERIFIED |
| PSPro Stainless & Sheet Metal LLC | Oklahoma City | OK | — | ◇ UNVERIFIED |
| PCProtean Construction INC | Burnsville | MN | — | ◇ UNVERIFIED |
| PMProto Mfg | Spokane | WA | — | ◇ UNVERIFIED |
| PSProvidence Saint Vincent Medical Center | Portland | OR | — | ◇ UNVERIFIED |
