| NLNuzelmeyer LLC | Bear | DE | — | ◇ UNVERIFIED |
| NPNyacol Products Incorporated | Ashland | MA | — | ◇ UNVERIFIED |
| NINytrex Industries, INC. | Macon | GA | — | ◇ UNVERIFIED |
| NPNyx Professional Make Up Hq | El Segundo | CA | — | ◇ UNVERIFIED |
| OCOak-bark CORP | Riegelwood | NC | — | ◇ UNVERIFIED |
| OPOaklite Products, INC | La Mirada | CA | — | ◇ UNVERIFIED |
| OCOasis Creative Design Company, LLC | Alamogordo | NM | — | ◇ UNVERIFIED |
| OCOasis Creative Design Company, LLC | Alamogordo | NM | — | ◇ UNVERIFIED |
| OCObagi Cosmeceuticals LLC | Long Beach | CA | — | ◇ UNVERIFIED |
| OIObenauf's, Inc. | Peck | ID | — | ◇ UNVERIFIED |
| OFOberon Fuels Kershaw Facility | Brawley | CA | — | ◇ UNVERIFIED |
| OObiter | Champaign | IL | — | ◇ UNVERIFIED |
| OCObsidian Chemical Solutions LLC | Midland | TX | — | ◇ UNVERIFIED |
| OCOccidental Chemical CORP | Mobile | AL | — | ◇ UNVERIFIED |
| OCOccidental Chemical CORP | New Castle | DE | — | ◇ UNVERIFIED |
| OCOccidental Chemical CORP. | Niagara Falls | NY | — | ◇ UNVERIFIED |
| OCOccidental Chemical Corporation | Jersey City | NJ | — | ◇ UNVERIFIED |
| OCOccidental Chemical Corporation – Augusta Silicate Plant | Augusta | GA | — | ◇ UNVERIFIED |
| OAOci Alabama LLC | Decatur | AL | — | ◇ UNVERIFIED |
| OMOc Minx Cosmetics | Laguna Hills | CA | — | ◇ UNVERIFIED |
| OPOctogen Pharmical Company | Cumming | GA | — | ◇ UNVERIFIED |
| OPOdin Pharmaceuticals LLC | Somerset | NJ | — | ◇ UNVERIFIED |
| OLOdry LLC | Miami | FL | — | ◇ UNVERIFIED |
| OTOdyssey Thera, INC | San Ramon | CA | — | ◇ UNVERIFIED |
| OIOemeta INC. | Salt Lake City | UT | — | ◇ UNVERIFIED |
| OIOep Innovations INC | San Diego | CA | — | ◇ UNVERIFIED |
| OEOes Equipment | San Diego | CA | — | ◇ UNVERIFIED |
| OAOhio Aluminum Chemicals LLC | Hamilton | OH | — | ◇ UNVERIFIED |
| OWOhio Warewashing Systems Inc. | Olmsted Township | OH | — | ◇ UNVERIFIED |
| OLOhm Laboratories INC. - Black Horse Lane | Monmouth Junction | NJ | — | ◇ UNVERIFIED |
| OLOhm Laboratories INC. New Brunswick Facility | New Brunswick | NJ | — | ◇ UNVERIFIED |
| OLOhm Laboratories INC. North Brunswick Facilit | North Brunswick | NJ | — | ◇ UNVERIFIED |
| OPOhr Paharma LLC (ohr Pharmaceutical) | San Diego | CA | — | ◇ UNVERIFIED |
| OCOhsu Creekside Pharmacy | Beaverton | OR | — | ◇ UNVERIFIED |
| OSOilfield Solutions Midland | Midland | TX | — | ◇ UNVERIFIED |
| OLOjp LLC | Los Angeles | CA | — | ◇ UNVERIFIED |
| OMOklahoma Materials Recycling | Atoka | OK | — | ◇ UNVERIFIED |
| OSOklahoma Steel Castings | Tulsa | OK | — | ◇ UNVERIFIED |
| OLOlay LLC | Cayey | PR | — | ◇ UNVERIFIED |
| OLOlay LLC | Cayey | PR | — | ◇ UNVERIFIED |
| OBOld Bridge Chemicals INC | Old Bridge Twp | NJ | — | ◇ UNVERIFIED |
| OTOld Town Soap Co. | Landis | NC | — | ◇ UNVERIFIED |
| O3Olein 3 Green Valley Industrial Park | Yabucoa | PR | — | ◇ UNVERIFIED |
| OCOlfera Corporation | South San Francisco | CA | — | ◇ UNVERIFIED |
| OFOligo Factory INC | Holliston | MA | — | ◇ UNVERIFIED |
| OBOlin - Blue Cube Operations, LLC | Plaquemine | LA | — | ◇ UNVERIFIED |
| OCOlin CORP Lake Charles Plant | Westlake | LA | — | ◇ UNVERIFIED |
| OCOlin CORP - Moundsville Plant | Moundsville | WV | — | ◇ UNVERIFIED |
| OCOlin Corporation | Manchester | TN | — | ◇ UNVERIFIED |
| OCOlin Corporation - Winchester Division | East Alton | IL | — | ◇ UNVERIFIED |
| OCOlin CORP Oxford Operations | East Alton | IL | — | ◇ UNVERIFIED |
| OROlin Rd Crude Butadiene Ms Mc 43 44 | Beaumont | TX | — | ◇ UNVERIFIED |
| OCOliver Chemical CO INC | Cincinnati | OH | — | ◇ UNVERIFIED |
| OTOliver Tucher | Los Altos | CA | — | ◇ UNVERIFIED |
| OCOlympic Chemical CORP | Tacoma | WA | — | ◇ UNVERIFIED |
| OMOlympic Mountain Products | Kent | WA | — | ◇ UNVERIFIED |
| OTOmaha Transloading Corporation | Omaha | NE | — | ◇ UNVERIFIED |
| OTOmaha Transloading Corporation | Omaha | NE | — | ◇ UNVERIFIED |
| OCOmega Chemical CORP Omega Reco | Whittier | CA | — | ◇ UNVERIFIED |
| ODOmega & Delta CO INC | Carolina | PR | — | ◇ UNVERIFIED |
| ODOmega & Delta CO INC | Carolina | PR | — | ◇ UNVERIFIED |
| OEOmg Electronic Chemicals | South Plainfield | NJ | — | ◇ UNVERIFIED |
| OEOmg Electronic Chemicals LLC | Newark | NJ | — | ◇ UNVERIFIED |
| OBOmni Bioenergy LLC | Granite City | IL | — | ◇ UNVERIFIED |
| OIOmni Industrial Solutions, INC | Longview | TX | — | ◇ UNVERIFIED |
| OIOmniox INC | San Carlos | CA | — | ◇ UNVERIFIED |
| OPOmni Preventive Care 3m Espe | Bentonville | AR | — | ◇ UNVERIFIED |
| OSOmnova Solutions INC. | Akron | OH | — | ◇ UNVERIFIED |
| OSOmnova Solutions INC. - Calhoun Latex Plant | Calhoun | GA | — | ◇ UNVERIFIED |
| OIOmya, INC. (n7709) | Escanaba | MI | — | ◇ UNVERIFIED |
| OSOmya Specialty Materials | Long Beach | CA | — | ◇ UNVERIFIED |
| OOncosenx | San Diego | CA | — | ◇ UNVERIFIED |
 On Demand Pharmaceuticals, INC. | Rockville | MD | — | ◇ UNVERIFIED |
| On Demand Pharmaceuticals, INC. | Tupelo | MS | — | ◇ UNVERIFIED |
| ONOndeo Nalco CO | Ellwood City | PA | — | ◇ UNVERIFIED |
| OCOnesource Compounding Pharmacy | Santa Cruz | CA | — | ◇ UNVERIFIED |
| OUOne Up Mfg 3 | Gardena | CA | — | ◇ UNVERIFIED |
| OWOne World, LLC | Argyle | TX | — | ◇ UNVERIFIED |
| OPOnline Packaging INC | Plover | WI | — | ◇ UNVERIFIED |
| OOnscent/norwood | Norwood | NJ | — | ◇ UNVERIFIED |
| OTOn Target Staffing, LLC | Auburndale | FL | — | ◇ UNVERIFIED |
| OBOpen Book Extracts | Roxboro | NC | — | ◇ UNVERIFIED |
| ODOpen Door Packaging | Chino | CA | — | ◇ UNVERIFIED |
| OPOpi Products INC. | N Hollywood | CA | — | ◇ UNVERIFIED |
| OIOptikem Intl | Denver | CO | — | ◇ UNVERIFIED |
| OCOption Care Enter Dba Walgreens Infus Services | Paducah | KY | — | ◇ UNVERIFIED |
| OCOption Care Enterprises INC Dba Option Care | Chico | CA | — | ◇ UNVERIFIED |
| OSOptum Specialty Pharmacy #801 | Phoenix | AZ | — | ◇ UNVERIFIED |
| OCOrange Carbon Black Plant | Orange | TX | — | ◇ UNVERIFIED |
| OCOrange County Chemical Supply Drum Site | Santa Fe Springs | CA | — | ◇ UNVERIFIED |
| OMOrasis Medical | Laguna Hills | CA | — | ◇ UNVERIFIED |
| OBOregon Basin - Polyacrylamide Plant | Park | WY | — | ◇ UNVERIFIED |
| OGOregon Global Distribution | Medford | OR | — | ◇ UNVERIFIED |
| OBOrganic By Nature | Long Beach | CA | — | ◇ UNVERIFIED |
| OCOrganic Consultants (woodruff) | Eugene | OR | — | ◇ UNVERIFIED |
 Organic Dyes and Pigments | Providence | RI | — | ◇ UNVERIFIED |
| OFOrganic Filling Solutions LLC | Chatsworth | CA | — | ◇ UNVERIFIED |
| OLOrganics LLC | Chicago | IL | — | ◇ UNVERIFIED |
| OUOrganon USA INC. | West Orange | NJ | — | ◇ UNVERIFIED |
| OOrica | Bonne Terre | MO | — | ◇ UNVERIFIED |
