| NMNash Manufacturing & Grinding Services | Springfield | MA | — | ◇ UNVERIFIED |
| NVNashoba Valley Structural | Lunenburg | MA | — | ◇ UNVERIFIED |
| NTNational Tube Form | Fort Wayne | IN | — | ◇ UNVERIFIED |
| NFNatl Fabricators & Mach/north East Plt | North East | PA | — | ◇ UNVERIFIED |
| NBNci Bldg Sys Inc/ambridge | Ambridge | PA | — | ◇ UNVERIFIED |
| NPNekoosa Packaging, Memphis Boxplant | Memphis | TN | — | ◇ UNVERIFIED |
| NGNelson Global - Fortune Circle | Indianapolis | IN | — | ◇ UNVERIFIED |
| NINeo Industries (weirton) INC. | Weirton | WV | — | ◇ UNVERIFIED |
| NUNeoplan USA CORP | Lamar | CO | — | ◇ UNVERIFIED |
| NTNewberry Tanks and Equipment, LLC | Memphis | TN | — | ◇ UNVERIFIED |
| NENew England Expert Technologies Ne Xt | Greenfield | MA | — | ◇ UNVERIFIED |
| NMNew Millenium Building Systems | Continental | OH | — | ◇ UNVERIFIED |
| NMNew Millennium Building System S INC | Florence | SC | — | ◇ UNVERIFIED |
| NNNewport News Shipbuilding Oakland Industrial Oip | Newport News | VA | — | ◇ UNVERIFIED |
| NLNext Level Metal | Baldwin | IL | — | ◇ UNVERIFIED |
| NWNfm Welding Engineers INC | Massillon | OH | — | ◇ UNVERIFIED |
| NWNiermann Weeks Company, INC | Millersville | MD | — | ◇ UNVERIFIED |
| NMNolin Milling INC | Dickens | IA | — | ◇ UNVERIFIED |
| NNNoll Norwesco LLC | Fife | WA | — | ◇ UNVERIFIED |
| NCNooter Corp-nooter CORP | Saint Louis | MO | — | ◇ UNVERIFIED |
| NMNor-cal Metal Fabricators | Oakland | CA | — | ◇ UNVERIFIED |
| NANorth American Construction Services, LTD. | Birmingham | AL | — | ◇ UNVERIFIED |
| NANorth American Kitchen Solutions, INC. | Dallas | GA | — | ◇ UNVERIFIED |
| NENorthern Engineering Company LLC | Superior | WI | — | ◇ UNVERIFIED |
| NMNorthern Metal Fab INC | Baldwin | WI | — | ◇ UNVERIFIED |
| NPNorth Penn Area 6 | Lansdale | PA | — | ◇ UNVERIFIED |
| NGNorthrop Grumman Ship Systems INC | Waggaman | LA | — | ◇ UNVERIFIED |
| NSNorthshore Steel INC | Two Harbors | MN | — | ◇ UNVERIFIED |
| NSNorth State Steel Incorporated | Greenville | NC | — | ◇ UNVERIFIED |
| NSNorthwest Steel Fab INC Deer Park | Deer Park | WA | — | ◇ UNVERIFIED |
| NMNorthwoods Manufacturing INC | Kingsford | MI | — | ◇ UNVERIFIED |
| NANov Ameron Tulsa Pole Products Welding & Fabrication | Tulsa | OK | — | ◇ UNVERIFIED |
| NINov Intelliserv. | Provo | UT | — | ◇ UNVERIFIED |
| NMNrg Maintenance Services | Houston | TX | — | ◇ UNVERIFIED |
| NCNuclear Containers, Inc., Esp/cbc Div. | Elizabethton | TN | — | ◇ UNVERIFIED |
| NINu-way Industries INC | Des Plaines | IL | — | ◇ UNVERIFIED |
| OFOberlin Filter Company | Pewaukee | WI | — | ◇ UNVERIFIED |
| OCObie Construction, INC. | Eugene | OR | — | ◇ UNVERIFIED |
| OIOcci INC. Wwtp | Fulton | MO | — | ◇ UNVERIFIED |
| OSOcean Steel CORP | Conklin | NY | — | ◇ UNVERIFIED |
| OTO'day Tank and Steel Company | Fargo | ND | — | ◇ UNVERIFIED |
| OFOem Fabricators INC | Neillsville | WI | — | ◇ UNVERIFIED |
| OIOfs International Houston Plant | Houston | TX | — | ◇ UNVERIFIED |
| OCOglivie Company INC the | Astoria | OR | — | ◇ UNVERIFIED |
| OSOhio Steel Industries | Pataskala | OH | — | ◇ UNVERIFIED |
| OOhmstede | La Porte | TX | — | ◇ UNVERIFIED |
| OEOmega Engineering INC | Bridgeport | NJ | — | ◇ UNVERIFIED |
| ONOmega Natchiq New Iberia Facility | New Iberia | LA | — | ◇ UNVERIFIED |
| OMOmni Metals CO INC | Somersworth | NH | — | ◇ UNVERIFIED |
| OSOne Source Systems LLC | Vicksburg | MS | — | ◇ UNVERIFIED |
| OLOpen Loop Energy - Nichols Facility | Safford | AZ | — | ◇ UNVERIFIED |
| OSOrange State Steel Construction, INC | Pinellas Park | FL | — | ◇ UNVERIFIED |
| OOOrchid Orthopedics | Arcadia | CA | — | ◇ UNVERIFIED |
| OOOrchid Orthopedics Solutions | Santa Ana | CA | — | ◇ UNVERIFIED |
| OIOregon Iron Works Hidden Way | Vancouver | WA | — | ◇ UNVERIFIED |
| OIOregon Iron Works INC 3001 | Vancouver | WA | — | ◇ UNVERIFIED |
| OIOrion Industries Auburn | Auburn | WA | — | ◇ UNVERIFIED |
| OMOrion Marine Construction, INC | Tampa | FL | — | ◇ UNVERIFIED |
| OMOrnamental Metalworks INC | Decatur | IL | — | ◇ UNVERIFIED |
| OSOtten Screw Products Co-otten Screw Products CO | Saint Louis | MO | — | ◇ UNVERIFIED |
| OSOutland Steel, INC. | Caldwell | ID | — | ◇ UNVERIFIED |
| OWO W Hubbell & Sons | New York Mills | NY | — | ◇ UNVERIFIED |
| OSOzark Steel Fabricators INC | Farmington | MO | — | ◇ UNVERIFIED |
| PSPabrico Steel Fabricators | Paterson | NJ | — | ◇ UNVERIFIED |
| PIPacal Industries LLC | La Crosse | WI | — | ◇ UNVERIFIED |
| PAPacific Award Metals INC | Baldwin Park | CA | — | ◇ UNVERIFIED |
| POPact One Llc/ W Norriton Twp | Trooper | PA | — | ◇ UNVERIFIED |
| PMPadnos Manufacturing INC | Grand Rapids | MI | — | ◇ UNVERIFIED |
| PMPalfinger Marine USA INC | Portsmouth | VA | — | ◇ UNVERIFIED |
| PAPall Aeropower CORP Fort Myers | Fort Myers | FL | — | ◇ UNVERIFIED |
| PWPampa Wind Tower Manufacturing Facility | Pampa | TX | — | ◇ UNVERIFIED |
| PPPaper People, LLC | Vancouver | WA | — | ◇ UNVERIFIED |
| PMParagon Machine Company, INC. | Saint Petersburg | FL | — | ◇ UNVERIFIED |
| PMParagon Metal Fabrication | Cincinnati | OH | — | ◇ UNVERIFIED |
| PHParker Hannifin CORP | Deerwood | MN | — | ◇ UNVERIFIED |
| PHParker Hannifin CORP Hpd | Marysville | OH | — | ◇ UNVERIFIED |
| PPParton & Preble INC | Warren | MI | — | ◇ UNVERIFIED |
| PFPasadena Fabrication Facility | Pasadena | TX | — | ◇ UNVERIFIED |
| PSPascagoula Sheet Metal Works INC | Pascagoula | MS | — | ◇ UNVERIFIED |
| PSPathfinder Systems INC | Kansas City | MO | — | ◇ UNVERIFIED |
| PEPayne Engineering & Fabrications | Canton | MA | — | ◇ UNVERIFIED |
| PPPdm Precast | Carlisle | IA | — | ◇ UNVERIFIED |
| PTPeacock Tool & Engineering | Spring Valley | CA | — | ◇ UNVERIFIED |
| PPPeko Precision Products Sheet Metal Division | Rochester | NY | — | ◇ UNVERIFIED |
| PMPelican Metal Products LLC | Harrison Township | MI | — | ◇ UNVERIFIED |
| PKPelletizer Knives | Houston | TX | — | ◇ UNVERIFIED |
| PIPemco INC | Pascagoula | MS | — | ◇ UNVERIFIED |
| PTPems Tool & Machine INC | Little Falls | NY | — | ◇ UNVERIFIED |
| PMPenasack Machine CO | Albion | NY | — | ◇ UNVERIFIED |
| PPPenz Products, INC. | Mishawaka | IN | — | ◇ UNVERIFIED |
| PTPeoria Tube Forming CORP | East Peoria | IL | — | ◇ UNVERIFIED |
| PEPerformance Energy Services LLC - Amelia Yard | Morgan City | LA | — | ◇ UNVERIFIED |
| PMPhilipp Mfg CO INC | Easthampton | MA | — | ◇ UNVERIFIED |
| PHP & H Mining Equipment | Milwaukee | WI | — | ◇ UNVERIFIED |
| PMPhoenix Manufacturing CO | Memphis | TN | — | ◇ UNVERIFIED |
| PMPhoenix Metalcraft | Phoenix | AZ | — | ◇ UNVERIFIED |
| PTPike Tool & Grinding Incorporated | Colorado Springs | CO | — | ◇ UNVERIFIED |
| PVPinson Valley Fabricators INC | Birmingham, Al | AL | — | ◇ UNVERIFIED |
| PAPioneer Aerospace CORP | Milton | FL | — | ◇ UNVERIFIED |
| PCPioneer Consolidated | North Oxford | MA | — | ◇ UNVERIFIED |
