| Castle Tire Recycling OR | Administrative & Waste Services | 0 | — | D |
| Castle Tire Recycling UT | Administrative & Waste Services | 0 | — | A |
| Castle Tire Recycling WA | Administrative & Waste Services | 0 | — | F |
| Castle Valley Mining UT | — | 0 | — | — |
| Castleberry Inn Development, LLC GA | Real Estate | 0 | — | A |
| CastleBranch Inc NC | Information & Media | 0 | — | A |
| CastleBridge Consulting, LLC FL | Professional & Technical Services | 1 | $165,000 | — |
| Castlegate Building Corporation FL | Construction | 0 | — | F |
| CastleKnight Management LP NY | Finance & Insurance | 3 | $158,333 | — |
| Castleman Tire and Repair KY | Other Services | 0 | — | A |
| Castlen Steel, LLC KY | Manufacturing | 0 | — | A |
| CastlePierce WI | Manufacturing | 0 | — | C |
| Castlerock Asset Management FL | Accommodation & Food Services | 0 | — | F |
| CASTLEROCK DEVELOPMENT, A CALIFORNIA CORPORATION CA | Construction | 0 | — | F |
| Castlerock Excavating Inc MT | Construction | 0 | — | A |
| Castlerock Farming and Transport. LLC CA | Agriculture & Forestry | 0 | — | A |
| Castlerock Hospitality - Bobby Hotel TN | — | 0 | — | — |
| CASTLETON COMMODITIES MANAGEMENT SERVICES LLC CT | Finance & Insurance | 10 | $152,000 | — |
| Castleton Lyons, Inc. KY | Agriculture & Forestry | 0 | — | D |
| Castleview Hospital UT | Healthcare & Social Assistance | 0 | — | A |
| Castlewood Country Club CA | — | 0 | — | — |
| Castlewood Farmers Elevator SD | Wholesale Trade | 0 | — | A |
| Castlewood Treatment Center MO | Healthcare & Social Assistance | 0 | — | A |
| Castlewood West CA | Healthcare & Social Assistance | 0 | — | A |
| Castleworks CA | Construction | 0 | — | F |
| Castlight Health, Inc. CA | Professional & Technical Services | 1 | $158,505 | — |
| Castlight Health, Inc. WA | Professional & Technical Services | 8 | $182,431 | — |
| CASTO Management Services FL | Real Estate | 0 | — | A |
| CASTO Management Services NC | Real Estate | 0 | — | A |
| CASTO Management Services, Inc. OH | Real Estate | 1 | $103,000 | B |
| Casto Technical Services WV | Construction | 0 | — | A |
| Castolin Eutectic WI | Manufacturing | 0 | — | F |
| Castone Corporation AL | Manufacturing | 0 | — | B |
| Castoro Cellars CA | Manufacturing | 0 | — | F |
| Castro Constructions Inc CO | Construction | 0 | — | A |
| Castro County Hospital District TX | Healthcare & Social Assistance | 0 | — | A |
| Castro Roofing of Texas, LLC TX | Construction | 0 | — | A |
| Castro Valley Health Inc. CA | Administrative & Waste Services | 1 | $90,000 | — |
| Castro Valley Sanitary District CA | Public Administration | 0 | — | C |
| Castwell Products, LLC Revised Notice) IL | — | 0 | — | — |
| Casual Aluminum LLC FL | Manufacturing | 0 | — | F |
| Casual Elegance Enterprises, Inc. FL | Other Services | 0 | — | D |
| Casual Films Inc. NY | Arts & Entertainment | 1 | $137,090 | — |
| Casual Line Corporation FL | Manufacturing | 0 | — | B |
| Casual Living Unlimited PA | Manufacturing | 0 | — | F |
| Casual Plastics LLC FL | Manufacturing | 0 | — | F |
| Casual Style Inc. IL | Retail Trade | 2 | $71,760 | — |
| CASWELL COUNTY LOCAL GOVERNMENT NC | Public Administration | 0 | — | C |
| Caswell Developmental Center NC | Healthcare & Social Assistance | 0 | — | F |
| Cat 5 Couriers FL | Transportation & Warehousing | 0 | — | D |
