| Occidental Chemical Corporation TX | Manufacturing | 0 | — | A |
| Occidental Oil & Gas Corporation TX | Mining & Extraction | 0 | — | B |
| Occidental Petroleum Corporation CO | Mining & Extraction | 0 | — | A |
| Occidental Petroleum Corporation TX | Mining & Extraction | 11 | $165,627 | A |
| Occidnetal Petroleum Corporate TX | Mining & Extraction | 0 | — | A |
| OCCK, Inc. KS | Healthcare & Social Assistance | 0 | — | D |
| Occupational Health Centers of California, A Medical Corporation TX | Healthcare & Social Assistance | 1 | $103,002 | — |
| Occupational Health Centers of Kansas, P.A. TX | Healthcare & Social Assistance | 1 | $104,000 | — |
| Occupational Health Centers of the Southwest, P.A. (TX) TX | Healthcare & Social Assistance | 3 | $89,688 | — |
| Occupational Medicine Clinic IN | Healthcare & Social Assistance | 0 | — | F |
| Occupational Services, Incorporated PA | Healthcare & Social Assistance | 0 | — | F |
| Occupational Training Center of Burlington County NJ | Healthcare & Social Assistance | 0 | — | A |
| OCE Mechanical, LLC OK | Construction | 0 | — | F |
| Ocean AI, LLC CA | Professional & Technical Services | 1 | $54,288 | — |
| Ocean Approved Inc. dba Atlantic Sea Farms ME | Manufacturing | 0 | — | A |
| Ocean Avenue Properties, LLC CA | Accommodation & Food Services | 0 | — | A |
| Ocean Avenue Seafood CA | — | 0 | — | — |
| Ocean Bay Management NY | Accommodation & Food Services | 0 | — | F |
| Ocean Beach Hospital WA | Healthcare & Social Assistance | 0 | — | F |
| Ocean Beach Peoples Food Inc CA | Retail Trade | 0 | — | F |
| Ocean Beauty Seafoods, Inc WA | — | 0 | — | — |
| Ocean Blue Solutions, Inc. OH | Professional & Technical Services | 2 | $102,565 | — |
| Ocean Breeze Holdings, LLC VA | Arts & Entertainment | 0 | — | F |
| Ocean Breeze International CA | Agriculture & Forestry | 0 | — | F |
| Ocean Bridge Media Group Inc CA | Professional & Technical Services | 1 | $72,000 | — |
| Ocean Closet Company LLC dba California Closets FL | Construction | 0 | — | A |
| Ocean Colony Partners, LLC dba half Moon Bay Golf Links CA | — | 0 | — | — |
| Ocean County Landfill Corp. NJ | Administrative & Waste Services | 0 | — | A |
| Ocean Crest Seafoods, Inc MA | Wholesale Trade | 0 | — | A |
| Ocean Detailing USA Management Inc FL | Other Services | 0 | — | C |
| Ocean DSP LLC WA | Transportation & Warehousing | 0 | — | A |
| Ocean Electric Corp NY | Construction | 0 | — | F |
| OCEAN FRONT INVESTORS SC | Accommodation & Food Services | 0 | — | — |
| Ocean Genomics, Inc. PA | Professional & Technical Services | 1 | $126,000 | — |
| Ocean Group, Inc. CA | Manufacturing | 0 | — | D |
| Ocean Group, Inc. TX | Manufacturing | 0 | — | A |
| Ocean Harvesters LA | Agriculture & Forestry | 0 | — | A |
| Ocean Harvesters MS | Agriculture & Forestry | 0 | — | F |
| Ocean Harvesters VA | Agriculture & Forestry | 0 | — | F |
| Ocean Healthcare NJ | Healthcare & Social Assistance | 0 | — | F |
| Ocean Holiday, LP CA | Accommodation & Food Services | 0 | — | F |
| Ocean House Management LLC RI | Accommodation & Food Services | 0 | — | F |
| OCEAN IT SOFT LLC CA | Professional & Technical Services | 1 | $85,634 | — |
| Ocean Lakes Service Corp. SC | Construction | 0 | — | F |
| Ocean Logistics PA | — | 0 | — | — |
| Ocean Mecca Motel Inc MD | Accommodation & Food Services | 0 | — | A |
| Ocean Medical Center NJ | Healthcare & Social Assistance | 0 | — | F |
| Ocean Mist Farms CA | Transportation & Warehousing | 0 | — | B |
| OCEAN MONMOUTH CARE LLC NJ | Healthcare & Social Assistance | 0 | — | A |
| Ocean Park Healthcare, LLC CA | Healthcare & Social Assistance | 0 | — | F |
