| OTOn Taps LTD. | Chicago | IL | — | ◇ UNVERIFIED |
| OCOntario Castings, Performance Aluminum Products, Reeds Patterns & Molds, R&S ... | Ontario | CA | — | ◇ UNVERIFIED |
| ONOntario Neon CO INC | Ontario | CA | — | ◇ UNVERIFIED |
| OROntario Ranch | Ontario | CA | — | ◇ UNVERIFIED |
| OTOn The Cutting Edge Inc. | Denver | CO | — | ◇ UNVERIFIED |
 On The Edge MFG, Inc | Kittanning | PA | — | ◇ UNVERIFIED |
| OTOn the Level Fabrication, LLC | Winder | GA | — | ◇ UNVERIFIED |
| OTOn the Mean, Machine, LLC | Grand Rapids | OH | — | ◇ UNVERIFIED |
| OTOn Time Fab INC | Saint Joseph | KY | — | ◇ UNVERIFIED |
| OTOn Time Signs | Fort Worth | TX | — | ◇ UNVERIFIED |
| OTOn Time Signs CORP. | Corona | NY | — | ◇ UNVERIFIED |
| OLOntrac Logistics INC | Fremont | CA | — | ◇ UNVERIFIED |
| OCOnward Coatings Dba Wheel Craft | Mentor | OH | — | ◇ UNVERIFIED |
| OWOn Wings, INC. | Englewood | CO | — | ◇ UNVERIFIED |
| OFOostman Fabricating & Welding, INC. | Westmont | IL | — | ◇ UNVERIFIED |
| OFOpc Fabrication and Equipment, INC. (fn) | Phoenix | AZ | — | ◇ UNVERIFIED |
| OSOpen Sailing, INC. | Long Beach | CA | — | ◇ UNVERIFIED |
| OIOpeo INC | Auburn Hills | MI | — | ◇ UNVERIFIED |
| OOOpEx OpCo Inc. | Minneapolis | MN | — | ◇ UNVERIFIED |
| OIOPMP, Inc. | Tracy | CA | — | ◇ UNVERIFIED |
| OTOp Tanks LLC | Pleasant View | UT | — | ◇ UNVERIFIED |
| OCOptibelt CORP | Bartlett | IL | — | ◇ UNVERIFIED |
| OSOptical Structures Incorporated dba Astrodon | Rancho Cordova | CA | — | ◇ UNVERIFIED |
| OTOptics Technology, INC. | Pittsford | NY | — | ◇ UNVERIFIED |
| OPOptima Precision, Inc. | San Jose | CA | — | ◇ UNVERIFIED |
 Optimum Controls Corporation | Reading | PA | — | ◇ UNVERIFIED |
| OPOptimum Parts Company | Holyoke | MA | — | ◇ UNVERIFIED |
| OSOptimum Sorting INC Dba Optimum INC | Turlock | CA | — | ◇ UNVERIFIED |
| OPOptinova Production LLC | Brooklyn Park | MN | — | ◇ UNVERIFIED |
| OOptosigma | Costa Mesa | CA | — | ◇ UNVERIFIED |
| OIOptotherm INC | Franklin Park | PA | — | ◇ UNVERIFIED |
| OSOptron Systems Incorporated | Bedford | MA | — | ◇ UNVERIFIED |
| OMOpw Mgmt Systems | Hodgkins | IL | — | ◇ UNVERIFIED |
| OBOquawka Boats & Fabrication INC | Oquawka | IL | — | ◇ UNVERIFIED |
| OBOrange Box Productions Dba Fastsigns of Torrance | Torrance | CA | — | ◇ UNVERIFIED |
| OCOrange CO Name Plate CO INC | Santa Fe Springs | CA | — | ◇ UNVERIFIED |
| OCOrange Co, Pfrd/facilities Operations | Santa Ana | CA | — | ◇ UNVERIFIED |
| OCOrange County Color Graphics | Anaheim | CA | — | ◇ UNVERIFIED |
| OPOrange Park Machine, INC. | Orange Park | FL | — | ◇ UNVERIFIED |
| OSOrange State Steel | Bartow | FL | — | ◇ UNVERIFIED |
| OSOrange State Steel Construction, INC. | Riverview | FL | — | ◇ UNVERIFIED |
| OSOrange Steel Roofing Products | Orange | VA | — | ◇ UNVERIFIED |
| OLOrangeworks LLC | Fort Wayne | IN | — | ◇ UNVERIFIED |
| OAOrbital Atk | Clearfield | UT | — | ◇ UNVERIFIED |
| OAOrchard Ag Farms INC | Modesto | CA | — | ◇ UNVERIFIED |
| OCOrchard Cove INC | Canton | MA | — | ◇ UNVERIFIED |
| OMOrchard Machinery CORP | Chico | CA | — | ◇ UNVERIFIED |
| OMOrchard Machinery Corporation | Ceres | CA | — | ◇ UNVERIFIED |
| OMOrchard Machinery Corporation | Shafter | CA | — | ◇ UNVERIFIED |
| OMOrchard Machinery Corporation | Orland | CA | — | ◇ UNVERIFIED |
| OMOrchard Machinery Corportaion | Durham | CA | — | ◇ UNVERIFIED |
| OROrchard Rite | Yakima | WA | — | ◇ UNVERIFIED |
| OROrchard Rite Union Gap | Yakima | WA | — | ◇ UNVERIFIED |
| OSOrchard Shell | Collinsville | IL | — | ◇ UNVERIFIED |
| OMOrchid Mt Juliet LLC | Mount Juliet | TN | — | ◇ UNVERIFIED |
| OCOrco Construction Supply | Bloomington | CA | — | ◇ UNVERIFIED |
| OCOr CO Painting | Fullerton | CA | — | ◇ UNVERIFIED |
| OCOr. CO. Plating CO INC | Orange | CA | — | ◇ UNVERIFIED |
| ODOrdaz Drilling | Paramount | CA | — | ◇ UNVERIFIED |
| OSOrde Sign and Graphics, INC | De Pere | WI | — | ◇ UNVERIFIED |
| OMOrd Mfg INC | Ord | NE | — | ◇ UNVERIFIED |
| ODOreco Duct System INC | Baldwin Park | CA | — | ◇ UNVERIFIED |
| OAOregon Afscme Council 75 | Salem | OR | — | ◇ UNVERIFIED |
| OCOregon City Signs INC | Oregon City | OR | — | ◇ UNVERIFIED |
| OHOregon Holiday Products LLC | Forest Grove | OR | — | ◇ UNVERIFIED |
| OIOregon Industrial Repair INC | Salem | OR | — | ◇ UNVERIFIED |
| OMOregon Machine Works, INC. | Canby | OR | — | ◇ UNVERIFIED |
| OMOregon Metallurgy LLC | Troutdale | OR | — | ◇ UNVERIFIED |
| OPOregon Pacific Structural Fabrication, LLC | Mulino | OR | — | ◇ UNVERIFIED |
| OPOregon Precision Manufacturing INC | Sherwood | OR | — | ◇ UNVERIFIED |
| OSOreland Sheet Metal Inc | Huntingdon Valley | PA | — | ◇ UNVERIFIED |
| OMOremus Material LLC | Mccook | IL | — | ◇ UNVERIFIED |
| OEOren Elliott Products, INC. | Edgerton | OH | — | ◇ UNVERIFIED |
| OCOrganic Compounds & Fox Truckmounts INC | Gardena | CA | — | ◇ UNVERIFIED |
| OTOrganic Transit INC. | Durham | NC | — | ◇ UNVERIFIED |
| OLOrganized Living | Bloomington | IN | — | ◇ UNVERIFIED |
| OUOrica USA INC | Chana | IL | — | ◇ UNVERIFIED |
| OUOrica USA INC | Marion | IL | — | ◇ UNVERIFIED |
| OUOrica USA INC | Mccook | IL | — | ◇ UNVERIFIED |
| OIOrientations, Inc. | Blaine | MN | — | ◇ UNVERIFIED |
| OIOrientations INC Dba Designer Sign Systems | Minneapolis | MN | — | ◇ UNVERIFIED |
| OEOri Enterprises LLC | Price | UT | — | ◇ UNVERIFIED |
| OEOri Enterprises LLC | Wellington | UT | — | ◇ UNVERIFIED |
| OEOriginal Exhaust Manufacturers INC | Hopkinsville | KY | — | ◇ UNVERIFIED |
| OBOrigin Books LLC | Kent | WA | — | ◇ UNVERIFIED |
| OSOrin Screws Products | Van Nuys | CA | — | ◇ UNVERIFIED |
| OAOrion Asset Management Co., LLC | Akron | OH | — | ◇ UNVERIFIED |
| ODOrion Design Company INC. | Jonesboro | AR | — | ◇ UNVERIFIED |
| ODOrion Drilling Company, LLC | Corpus Christi | TX | — | ◇ UNVERIFIED |
| OIOrion Industries, INC. | Broadview Heights | OH | — | ◇ UNVERIFIED |
| OIOrion Industries, LTD. | Chicago | IL | — | ◇ UNVERIFIED |
| OIOrion Industries, LTD. | Chicago | IL | — | ◇ UNVERIFIED |
| OMOrion Manufacturing LLC | Orange | CA | — | ◇ UNVERIFIED |
| OPOrion Properties Group LLC | New Prague | MN | — | ◇ UNVERIFIED |
| OIOrlando Iron Works | Paterson | NJ | — | ◇ UNVERIFIED |
| OMOrlando Mart | Machesney Park | IL | — | ◇ UNVERIFIED |
| OIOrluck Industries INC | Otsego | MN | — | ◇ UNVERIFIED |
| ODOrnalux Design Company, INC. | Oakland | CA | — | ◇ UNVERIFIED |
| ODOrnamental Design Inc | Tampa | FL | — | ◇ UNVERIFIED |
| OIOrnamental Iron Concept,bartolome Fluxa | Van Nuys | CA | — | ◇ UNVERIFIED |
