| OFO Fab | Ocala | FL | — | ◇ UNVERIFIED |
| OMOgawa Manufacturing Enterprises Inc. | San Jose | CA | — | ◇ UNVERIFIED |
| OMOglesby Machining INC. | Newbury Park | CA | — | ◇ UNVERIFIED |
| OMOilco Machine Shop, INC. | Lafayette | LA | — | ◇ UNVERIFIED |
| OAOkeeffe Acquisitions LLC | Salisbury | NC | — | ◇ UNVERIFIED |
| OMOld Man's Garage, INC. | Rainbow City | AL | — | ◇ UNVERIFIED |
| OSOld School Industries INC | Dacono | CO | — | ◇ UNVERIFIED |
| OIOlson Industries, INC. | Atkinson | NE | — | ◇ UNVERIFIED |
| OCOmega Consolidated Corporation | Hilton | NY | — | ◇ UNVERIFIED |
| OMOmega Machine & Tool, INC. | Mentor | OH | — | ◇ UNVERIFIED |
| OTOmega Tool CO | Saint Louis | MO | — | ◇ UNVERIFIED |
| OMOm Machine & Tool LLC | Portland | OR | — | ◇ UNVERIFIED |
| OMOmni Measurement Systems | Winooski | VT | — | ◇ UNVERIFIED |
| OPOmni Precision | Houston | TX | — | ◇ UNVERIFIED |
| OPOmni Precision, INC. | Houston | TX | — | ◇ UNVERIFIED |
| ODOn Demand Edm INC | Blaine | MN | — | ◇ UNVERIFIED |
| OTOneida Tool Corporation | Redford | MI | — | ◇ UNVERIFIED |
| OTOne Ton Welding, Inc. | Panama | IA | — | ◇ UNVERIFIED |
| OAOnex Automation | Duarte | CA | — | ◇ UNVERIFIED |
| OCOnsite Calibartion Service INC | Louisville | KY | — | ◇ UNVERIFIED |
| OSOn Spot Portable Machine CO INC | Livonia | MI | — | ◇ UNVERIFIED |
| OTOn the Mean, Machine, LLC | Grand Rapids | OH | — | ◇ UNVERIFIED |
| OFOostman Fabricating & Welding, INC. | Westmont | IL | — | ◇ UNVERIFIED |
| OOOpEx OpCo Inc. | Minneapolis | MN | — | ◇ UNVERIFIED |
| OIOPMP, Inc. | Tracy | CA | — | ◇ UNVERIFIED |
| OPOptima Precision, Inc. | San Jose | CA | — | ◇ UNVERIFIED |
| OPOptimum Parts Company | Holyoke | MA | — | ◇ UNVERIFIED |
| OIOregon Industrial Repair INC | Salem | OR | — | ◇ UNVERIFIED |
| OMOregon Machine Works, INC. | Canby | OR | — | ◇ UNVERIFIED |
| OEOriginal Exhaust Manufacturers INC | Hopkinsville | KY | — | ◇ UNVERIFIED |
| OPOrion Properties Group LLC | New Prague | MN | — | ◇ UNVERIFIED |
| OIOrluck Industries INC | Otsego | MN | — | ◇ UNVERIFIED |
| ODOrnalux Design Company, INC. | Oakland | CA | — | ◇ UNVERIFIED |
| OCOrrbilt Compressors, INC. | Atlanta | GA | — | ◇ UNVERIFIED |
| OMOscar Macias and Sandra L. Macias | Gilroy | CA | — | ◇ UNVERIFIED |
| OMO&S Machine Shop, LLC | Latrobe | PA | — | ◇ UNVERIFIED |
| OTOutlook Tool, Inc. | Dayton | OH | — | ◇ UNVERIFIED |
| OTOutlook Tool, Inc. | Dayton | OH | — | ◇ UNVERIFIED |
| OUOver Under Real Estate, LLC | Riverton | NJ | — | ◇ UNVERIFIED |
| OMOviso Mfg | Fremont | CA | — | ◇ UNVERIFIED |
| OMOwens Machine & Manufacturing | Abilene | TX | — | ◇ UNVERIFIED |
| OPOwens Precision | Carson City | NV | — | ◇ UNVERIFIED |
| OPOwens Precision, INC. | Mound House | NV | — | ◇ UNVERIFIED |
| PPPablo Precision | Oakland Park | FL | — | ◇ UNVERIFIED |
| PSPacesetter Safety, Inc. | Santa Clarita | CA | — | ◇ UNVERIFIED |
| PAPacific Air Cargo Transfer Systems, Inc | Auburn | WA | — | ◇ UNVERIFIED |
| PSPacific Swiss & Manufacturing, Inc. | Tempe | AZ | — | ◇ UNVERIFIED |
| PTPacific Tool, Inc. | Redmond | WA | — | ◇ UNVERIFIED |
| PWPacific Welding Services | Asan | GU | — | ◇ UNVERIFIED |
| POPackage One, INC. | Schenectady | NY | — | ◇ UNVERIFIED |
| PDPackaging Dynamics LTD | Bohemia | NY | — | ◇ UNVERIFIED |
| PTPac Tec, LLC | Milton | WI | — | ◇ UNVERIFIED |
| PFPainted Feather Precision LLC | Ramsey | MN | — | ◇ UNVERIFIED |
| PMPaladin Manufacturing LLP | Marietta | OK | — | ◇ UNVERIFIED |
| PPPalese Proto Tech, INC. | Tucson | AZ | — | ◇ UNVERIFIED |
| PBPalm Beach Iron Works, INC. | West Palm Beach | FL | — | ◇ UNVERIFIED |
| PMPalmetto Mining INC. | Troup | TX | — | ◇ UNVERIFIED |
| PMPals Machining INC | Owatonna | MN | — | ◇ UNVERIFIED |
| PMPamco Machine Works INC | Rancho Cucamonga | CA | — | ◇ UNVERIFIED |
| PAP and J Precision Machine LLC | Chelmsford | MA | — | ◇ UNVERIFIED |
| PPPanhandle Packing & Gasket, Inc. | Lubbock | TX | — | ◇ UNVERIFIED |
| PIParadox Intellectual Properties, INC. | Chiefland | FL | — | ◇ UNVERIFIED |
| PMParagon Model & Tool CO | Wixom | MI | — | ◇ UNVERIFIED |
 Paramount Industrial Machining INC | Oak Park | MI | — | ◇ UNVERIFIED |
| PMParason Machine, INC. | Deep River | CT | — | ◇ UNVERIFIED |
 Paravis Industries INC Dba United Cnc Machining | Auburn Hills | MI | — | ◇ UNVERIFIED |
| PIParisi, INC. | Lewiston | ME | — | ◇ UNVERIFIED |
| PMParkside Machine & Fabrication | Carthage | MO | — | ◇ UNVERIFIED |
| PSPark Street Machine INC. | Muskegon Heights | MI | — | ◇ UNVERIFIED |
| PMParkway Machine & Metal Works, INC. | Saraland | AL | — | ◇ UNVERIFIED |
| PPPar_metal Products INC. | North Arlington | NJ | — | ◇ UNVERIFIED |
| PIPartco, INC. | Baton Rouge | LA | — | ◇ UNVERIFIED |
| PLPartsBadger LLC | West Bend | WI | — | ◇ UNVERIFIED |
| PPPassaic Pioneer Properties CO. | Passaic | NJ | — | ◇ UNVERIFIED |
 Patriot Machining and Fabrication LLC | Roseville | CA | — | ◇ UNVERIFIED |
| PPPattison Precision Products, INC. | Broken Arrow | OK | — | ◇ UNVERIFIED |
| PWPatton Welding | Kalkaska | MI | — | ◇ UNVERIFIED |
| PPPaul Precision Machine INC. | Tulsa | OK | — | ◇ UNVERIFIED |
| PPPavyer Printing Machine Works | Saint Louis | MO | — | ◇ UNVERIFIED |
| PLPdf LLC | Gilbert | AZ | — | ◇ UNVERIFIED |
| PDP D Q Machine, INC. | Machesney Park | IL | — | ◇ UNVERIFIED |
| PMPearlsnap Machine Works, LLC | Madison | WI | — | ◇ UNVERIFIED |
| PMPellco Machine INC | Saint Michael | MN | — | ◇ UNVERIFIED |
| PIPeninsula Iron Works | Portland | OR | — | ◇ UNVERIFIED |
| PEPenn Equipment Corporation | Port Carbon | PA | — | ◇ UNVERIFIED |
| PDPennsylvania Drilling Company, INC. | Mc Kees Rocks | PA | — | ◇ UNVERIFIED |
| PPPennsylvania Precision Products, Inc. | Vandergrift | PA | — | ◇ UNVERIFIED |
| PTPequot Tool - Mfg INC | Jenkins | MN | — | ◇ UNVERIFIED |
| PTPequot Tool - Mfg INC - North Building | Pine River | MN | — | ◇ UNVERIFIED |
| PFPerfect Form Manufacturing, LLC | Henrietta | NY | — | ◇ UNVERIFIED |
| PGPerfection Grinding INC | Minneapolis | MN | — | ◇ UNVERIFIED |
| PIPerfectools, INC. | Fremont | CA | — | ◇ UNVERIFIED |
| PFPerformance Fab, LLC | Seymour | WI | — | ◇ UNVERIFIED |
| PMPerformance Machine & Parts INC | Wellington | KS | — | ◇ UNVERIFIED |
| PMPerformance Machine Tech International | West Hills | CA | — | ◇ UNVERIFIED |
| PMPerformance Machine Tech International | Santa Clarita (Valencia Area) | CA | — | ◇ UNVERIFIED |
| PMPerformance Machine Works, LLC | Dothan | AL | — | ◇ UNVERIFIED |
| PMPerformance Machining, INC. | Irwin | PA | — | ◇ UNVERIFIED |
| PMPerformance Machining Services, INC. | Pensacola | FL | — | ◇ UNVERIFIED |
| PPPerformance Pattern & Machinery | Peoria | IL | — | ◇ UNVERIFIED |
