| NGNorthrop Grumman | Clearfield | UT | — | ◇ UNVERIFIED |
| NGNorthrop Grumman | Azusa | CA | — | ◇ UNVERIFIED |
| NGNorthrop Grumman CORP | Lake Charles | LA | — | ◇ UNVERIFIED |
| NGNorthrop Grumman CORP | Hawthorne | CA | — | ◇ UNVERIFIED |
| NGNorthrop Grumman CORP Aircraf | Compton | CA | — | ◇ UNVERIFIED |
| NGNorthrop Grumman CORP Aircraft Integration Center | Palmdale | CA | — | ◇ UNVERIFIED |
| NGNorthrop Grumman Mojave Hanger 71 | Mojave | CA | — | ◇ UNVERIFIED |
| NGNorthrop Grumman Newbury Park | Newbury Park | CA | — | ◇ UNVERIFIED |
| NGNorthrop Grumman Site 7 | Palmdale | CA | — | ◇ UNVERIFIED |
| NGNorthrop Grumman Systems | Manhattan Beach | CA | — | ◇ UNVERIFIED |
| NGNorthrop Grumman Systems CORP | Bethpage | NY | — | ◇ UNVERIFIED |
| NGNorthrop Grumman Systems CORP | Woodland Hills | CA | — | ◇ UNVERIFIED |
| NGNorthrop Grumman Systems CORP. | Mojave | CA | — | ◇ UNVERIFIED |
| NGNorthrop Grumman Systems CORP. | El Segundo | CA | — | ◇ UNVERIFIED |
| NGNorthrop Grumman Systems Corporation | Melbourne | FL | — | ◇ UNVERIFIED |
| NGNorthrop Grumman Systems Corporation | Saint Augustine | FL | — | ◇ UNVERIFIED |
| NGNorthrop Grumman Systems Corporation | Bethpage | NY | — | ◇ UNVERIFIED |
| NGNorthrop Grumman Systems Corporation - Clearfield, G13 | Clearfield | UT | — | ◇ UNVERIFIED |
| NGNorthrop Grumman Systems Corporation - Emerado | Emerado | ND | — | ◇ UNVERIFIED |
| NGNorthrup Grumman | Aurora | CO | — | ◇ UNVERIFIED |
| NMNorthstar Machine & Tool CO INC Dba Northstar Aero | Duluth | MN | — | ◇ UNVERIFIED |
| NANorthwest Aerospace Technologi | Everett | WA | — | ◇ UNVERIFIED |
| NMNorton Manufacturing, LLC | Norton | KS | — | ◇ UNVERIFIED |
| NENowlin Enterprises Inc | Columbus | OH | — | ◇ UNVERIFIED |
 Numerically Automated Cutting Systems INC | Elko | MN | — | ◇ UNVERIFIED |
 Nwi Nashville | Nashville | TN | — | ◇ UNVERIFIED |
| NDNys Dmna - Fms #11 | Rochester | NY | — | ◇ UNVERIFIED |
| OPOdyssey Propco Ii LLC | Santa Clara | CA | — | ◇ UNVERIFIED |
| OAOea Areospace INC | Fairfield | CA | — | ◇ UNVERIFIED |
| OIOmada International Sumner Division | Sumner | WA | — | ◇ UNVERIFIED |
| OAOmega Aircraft Articles LLC | Elkhorn | WI | — | ◇ UNVERIFIED |
| OEOmega Emgineering INC Dba Newport Electronics INC | Santa Ana | CA | — | ◇ UNVERIFIED |
| OEOntic Engineering & Manufactur | North Hollywood | CA | — | ◇ UNVERIFIED |
| OAOrbital Atk | Clearfield | UT | — | ◇ UNVERIFIED |
| OTOrion Test Systems INC | Auburn Hills | MI | — | ◇ UNVERIFIED |
| OOrizon | Chanute | KS | — | ◇ UNVERIFIED |
| OEOsprey Evaporation Technologies | North Kansas City | MO | — | ◇ UNVERIFIED |
| OAOtto Aviation Group LLC | Irvine | CA | — | ◇ UNVERIFIED |
| OAOverhaul Accessory INC | Medley | FL | — | ◇ UNVERIFIED |
| PCPacific Contours Corporation | Anaheim | CA | — | ◇ UNVERIFIED |
| PCPacific Contours San Diego Division | Spring Valley | CA | — | ◇ UNVERIFIED |
| PSPacific Scientific | Dallas | TX | — | ◇ UNVERIFIED |
| PSPacific Scientific CO Htl/ki | Duarte | CA | — | ◇ UNVERIFIED |
| PSPacific Scientific Htl/kin-tech Div | Duarte | CA | — | ◇ UNVERIFIED |
| PBPalm Beach Aircraft Services INC | Lantana | FL | — | ◇ UNVERIFIED |
| PAPanasonic Avionics Corporation | Irvine | CA | — | ◇ UNVERIFIED |
| PAPanasonic Avionics Corporation | Lake Forest | CA | — | ◇ UNVERIFIED |
| PHParker Hannifin CORP | Irvine | CA | — | ◇ UNVERIFIED |
| PNParker Ndt, LLC | Clearwater | FL | — | ◇ UNVERIFIED |
| PMPas Mro, INC. | Irvine | CA | — | ◇ UNVERIFIED |
