| NDNovaphos Development LLC | Fort Meade | FL | — | ◇ UNVERIFIED |
| NPNova Pressroom Products | Jacksonville | FL | — | ◇ UNVERIFIED |
| NBNovozymes Biologicals INC - South Broad Street | Salem | VA | — | ◇ UNVERIFIED |
| NANufarm Americas INC | Chicago Heights | IL | — | ◇ UNVERIFIED |
| NLNumake-2 LLC of Mn | Little Falls | MN | — | ◇ UNVERIFIED |
| NINuset Industries, Orrco, 02 Bl (nuseti) | Salt Lake City | UT | — | ◇ UNVERIFIED |
| NNutrablend | Madera | CA | — | ◇ UNVERIFIED |
| NPNyacol Products Incorporated | Ashland | MA | — | ◇ UNVERIFIED |
| OCOak-bark CORP | Riegelwood | NC | — | ◇ UNVERIFIED |
| OFOberon Fuels Kershaw Facility | Brawley | CA | — | ◇ UNVERIFIED |
| OObiter | Champaign | IL | — | ◇ 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 |
| OAOhio Aluminum Chemicals LLC | Hamilton | OH | — | ◇ UNVERIFIED |
| OMOklahoma Materials Recycling | Atoka | OK | — | ◇ UNVERIFIED |
| OSOklahoma Steel Castings | Tulsa | OK | — | ◇ UNVERIFIED |
| OBOld Bridge Chemicals INC | Old Bridge Twp | NJ | — | ◇ UNVERIFIED |
| OFOligo Factory INC | Holliston | MA | — | ◇ UNVERIFIED |
| OBOlin - Blue Cube Operations, LLC | Plaquemine | LA | — | ◇ UNVERIFIED |
| OCOlin CORP Lake Charles Plant | Westlake | LA | — | ◇ UNVERIFIED |
| OCOlin Corporation | Manchester | TN | — | ◇ UNVERIFIED |
| OROlin Rd Crude Butadiene Ms Mc 43 44 | Beaumont | TX | — | ◇ UNVERIFIED |
| OCOliver Chemical CO INC | Cincinnati | OH | — | ◇ UNVERIFIED |
| OTOmaha Transloading Corporation | Omaha | NE | — | ◇ UNVERIFIED |
| OIOmya, INC. (n7709) | Escanaba | MI | — | ◇ UNVERIFIED |
| OCOrange Carbon Black Plant | Orange | TX | — | ◇ UNVERIFIED |
| OMOrasis Medical | Laguna Hills | CA | — | ◇ UNVERIFIED |
 Organic Dyes and Pigments | Providence | RI | — | ◇ UNVERIFIED |
| OEOrion Engineered Carbons, LLC. | Franklin | LA | — | ◇ UNVERIFIED |
| OEOrion Engineered Carbons LLC - Ivanhoe Carbon Black Plant | Franklin | LA | — | ◇ UNVERIFIED |
| OBOsprey Biotechnics | Sarasota | FL | — | ◇ UNVERIFIED |
| OEOxbow Energy Solutions | Texas City | TX | — | ◇ UNVERIFIED |
| OIOxford Immunotec USA Marlborough | Marlborough | MA | — | ◇ UNVERIFIED |
| OVOxy Vinyls LP - Deer Park Vcm Facility | Deer Park | TX | — | ◇ UNVERIFIED |
| PSP2 Sciences INC. | Naugatuck | CT | — | ◇ UNVERIFIED |
| PPP4 Production LLC (tv Facility) | Soda Springs | ID | — | ◇ UNVERIFIED |
| PPPacheco Plaza Cleaners | Novato | CA | — | ◇ UNVERIFIED |
| PBPacific Biodiesel INC | Kahului | HI | — | ◇ UNVERIFIED |
| PCPacific Compounding Pharmacy | Stockton | CA | — | ◇ UNVERIFIED |
| PHPacific Hydrotech Corporation | Mission Viejo | CA | — | ◇ UNVERIFIED |
 Pacific Industrial Development Corporation | Spartanburg | SC | — | ◇ UNVERIFIED |
| PLPacific Light Technologies | Portland | OR | — | ◇ UNVERIFIED |
| PPPact Pharma INC | Riverside | CA | — | ◇ UNVERIFIED |
 Pajarito Powder | Albuquerque | NM | — | ◇ UNVERIFIED |
| PTPAK Technologies Holding Company Inc. | Milwaukee | WI | — | ◇ UNVERIFIED |
| PDPampa Development & Manufacturing Center | Pampa | TX | — | ◇ UNVERIFIED |
