| O'Reilly Automotive Stores, Inc NC | Retail Trade | 0 | - | F |
| O'Reilly Automotive Stores, Inc OH | Retail Trade | 0 | - | C |
| O'Reilly Automotive Stores, Inc TN | Retail Trade | 0 | - | F |
| O'Reilly Automotive Stores, Inc TX | Retail Trade | 0 | - | D |
| O'Reilly Automotive Stores, Inc UT | Retail Trade | 0 | - | D |
| O'Reilly Automotive Stores, Inc WA | Retail Trade | 0 | - | F |
| O'Reilly Automotive, Inc. AZ | - | 0 | - | - |
| O'Reilly Hospitality Management CO | Accommodation & Food Services | 0 | - | F |
| O'Reilly Hospitality Management TX | Accommodation & Food Services | 0 | - | F |
| O(1) Labs Operating Corporation CA | Information & Media | 2 | $235,000 | - |
| O-AT-KA Milk Products NY | Manufacturing | 0 | - | F |
| O-I (Owens-Illinois, Inc./Owens-Brockway Glass Container, Inc.) TX | - | 0 | - | - |
| O. Bahat, J. Gordon A Dental Corporation CA | - | 1 | $156,000 | - |
| O.A. Both Corporation MA | - | 1 | $124,537 | - |
| O.C. Jones & Sons, Inc. CA | Construction | 0 | - | F |
| O.C. Seacrets, Inc. MD | Accommodation & Food Services | 0 | - | C |
| O.C. Tanner Company UT | Manufacturing | 2 | $135,506 | - |
| O.C. Tanner Company UT | - | 3 | $142,771 | - |
| O.C. Tanner Recognition Company UT | - | 1 | $300,000 | - |
| O.E. Wheel Distributors LLC FL | - | 1 | $100,000 | - |
| O.E.C. Shipping Los Angeles, Inc. CA | Professional & Technical Services | 2 | $63,000 | - |
| O.E.S. Equipment, LLC TX | Real Estate | 1 | $98,509 | - |
| O.M.G Entertainment CA | Professional & Technical Services | 2 | $74,880 | - |
| O.P.E.N. America, Inc. dba: OpenWorks AZ | - | 0 | - | - |
| O.P.H Laguna Hills, Inc. dba The Original Pancake House CA | - | 0 | - | - |
| O.P.H. - R.B., Inc., The Original Pancake House CA | - | 0 | - | - |
| O.P.I. Products Inc. CA | - | 0 | - | - |
| O.R. Builders Inc. CA | Construction | 0 | - | F |
| O.S. Kelly Company OH | Manufacturing | 0 | - | F |
| O.W. Lee Co., Inc. CA | - | 0 | - | - |
| O.W. Lee, Inc. TX | Manufacturing | 0 | - | F |
| O1 Communications, Inc. CA | - | 0 | - | - |
| O2 Technologies INC CA | Professional & Technical Services | 10 | $99,500 | - |
| O2M Technologies, LLC IL | Healthcare & Social Assistance | 1 | $69,576 | - |
| O3 Technology Solutions LLC NJ | Professional & Technical Services | 40 | $102,898 | - |
| O3 Technology Solutions, LLC NY | Professional & Technical Services | 2 | $92,248 | - |
| O3b Networks USA, LLC VA | Professional & Technical Services | 1 | $121,040 | - |
| o9 Solutions, Inc. TX | Professional & Technical Services | 61 | $147,512 | - |
| OA Logistics CA | - | 0 | - | - |
| OA Logistics GA | - | 0 | - | - |
| Oa Valley Hospital District CA | Healthcare & Social Assistance | 0 | - | F |
| Oacaa & Opae OH | - | 0 | - | - |
| Oak and Iron Fitness NC | Arts & Entertainment | 1 | $38,500 | - |
| Oak Beverages, Inc. (Warehouse) NY | - | 0 | - | - |
| Oak Creek Homes TX | Manufacturing | 0 | - | F |
| Oak Crest Academy LLC CA | - | 2 | $80,109 | - |
| Oak Farms Dallas West TX | - | 0 | - | - |
| Oak Forest Management, LLC TX | Construction | 1 | $74,152 | - |
| Oak Forest Realty MA | - | 1 | $90,230 | - |
| Oak Forest Realty, LLC MA | Real Estate | 2 | $80,080 | - |