| MMMaro Manufacturing, INC. | Tulsa | — | ◇ UNVERIFIED |
| MMMartin Manufactuirng, INC. | Sapulpa | — | ◇ UNVERIFIED |
| MRMaverick Realty LLC | Norman | — | ◇ UNVERIFIED |
| MIMcpherson Implement, Incorporated | Norman | — | ◇ UNVERIFIED |
| MSMelling Sintered Metals | Billings | — | ◇ UNVERIFIED |
| MBMetal Building Services | Ardmore | — | ◇ UNVERIFIED |
| MCMetal Cleaning and Fininshing | Tulsa | — | ◇ UNVERIFIED |
| MCMetal Container Corporation | Oklahoma City | — | ◇ UNVERIFIED |
| MCMetal Container Fabrication Faclty | Oklahoma City | — | ◇ UNVERIFIED |
| MIMetalspand INC. | Waurika | — | ◇ UNVERIFIED |
 Metaltech, INC. | Oklahoma City | — | ◇ UNVERIFIED |
| MIMetcoat, INC. | Duncan | — | ◇ UNVERIFIED |
| MSMetro Sales and Assembly, INC. | Broken Arrow | — | ◇ UNVERIFIED |
| MMMidstate Manufacturing & Marketing, INC. | Oklahoma City | — | ◇ UNVERIFIED |
| MAMidwest Automation, INC. | Heavener | — | ◇ UNVERIFIED |
| MAMingo Aerospace, LLC | City of Owasso | — | ◇ UNVERIFIED |
| MMiswaco | Tulsa | — | ◇ UNVERIFIED |
| MIMitchco INC | Ponca City | — | ◇ UNVERIFIED |
| MEMLM Enterprises LLC | Oklahoma City | — | ◇ UNVERIFIED |
| MMM & M Manufacturing, INC. | Tulsa | — | ◇ UNVERIFIED |
| MMM & M Manufacturing, INC. | Tulsa | — | ◇ UNVERIFIED |
| MPModern Plating CO. INC. | Tulsa | — | ◇ UNVERIFIED |
| MFMorgan Fabrication | Oklahoma City | — | ◇ UNVERIFIED |
| MHMowdy Holdings LLC | Duncan | — | ◇ UNVERIFIED |
| MMMuskogee Metal Fabricators, INC. | Muskogee | — | ◇ UNVERIFIED |
| MBM.w. Bevins CO. | Tulsa | — | ◇ UNVERIFIED |
| NONational Oilwell Varco LP / Nov Oklahoma City Rig Offshore | Oklahoma City | — | ◇ UNVERIFIED |
| NONational Oilwell Varco LP / Nov Rs Okc Facility | Oklahoma City | — | ◇ UNVERIFIED |
| NGNci Group INC. | Oklahoma City | — | ◇ UNVERIFIED |
| NMNeilson Manufacturing | Tulsa | — | ◇ UNVERIFIED |
| NFNeo Fab LLC / Neo Fab Metal Fabrication Facility | Miami | — | ◇ UNVERIFIED |
| NINewfield Industries INC. | Tulsa | — | ◇ UNVERIFIED |
| OAOffroad Addiction, Inc | Oklahoma City | — | ◇ UNVERIFIED |
| OKOh Keys | Bethany | — | ◇ UNVERIFIED |
| OSOklahoma Safety Equipment Company | Broken Arrow | — | ◇ UNVERIFIED |
| OSOklahoma Specialties INC. | Owasso | — | ◇ UNVERIFIED |
| OSOklahoma Stair Craft, INC. | Sapulpa | — | ◇ UNVERIFIED |
| OSOklahoma Steel and Wire | Madill | — | ◇ UNVERIFIED |
| OSOklahoma Steel and Wire Company, INC. | Madill | — | ◇ UNVERIFIED |
| OSOklahoma Superior Plating, L.l.c. | Duncan | — | ◇ UNVERIFIED |
| PMPaladin Manufacturing LLP | Marietta | — | ◇ UNVERIFIED |
| PMPattison Metal Fab, INC. | Broken Arrow | — | ◇ UNVERIFIED |
| PPPattison Precision Products, INC. | Broken Arrow | — | ◇ UNVERIFIED |
| PPPaul Precision Machine INC. | Tulsa | — | ◇ UNVERIFIED |
| PPPaul Precision Machine, INC. | Tulsa | — | ◇ UNVERIFIED |
| PPPeerless Plating, INC. | Oklahoma City | — | ◇ UNVERIFIED |
| PSPenny Sheet Metal, L.l.c. | Broken Arrow | — | ◇ UNVERIFIED |
| PCPerformance Coatings INC | Oklahoma City | — | ◇ UNVERIFIED |
| PCPlatform Coatings LLC / Platform Coatings LLC | Oklahoma City | — | ◇ UNVERIFIED |
| PFPlatinum Fabrication, LLC | Heavener | — | ◇ UNVERIFIED |
