| Frontera Generation TX | Utilities | 0 | — | A |
| FRONTERA PRODUCE LTD TX | Agriculture & Forestry | 0 | — | A |
| Frontera Textile Distributors LLC TX | Wholesale Trade | 0 | — | C |
| Frontgrade Colorado Springs CO | Manufacturing | 0 | — | C |
| Frontgrade Technologies NH | Manufacturing | 0 | — | A |
| Frontida BioPharm LLc PA | Manufacturing | 0 | — | A |
| Frontida Inc WI | Healthcare & Social Assistance | 0 | — | A |
| Frontida Management Group LLC WI | Healthcare & Social Assistance | 0 | — | A |
| Frontier WA | Manufacturing | 0 | — | A |
| Frontier Access TX | Administrative & Waste Services | 0 | — | D |
| Frontier Ag Co., Inc. CA | Wholesale Trade | 0 | — | C |
| Frontier Ag, Inc. KS | Wholesale Trade | 0 | — | A |
| Frontier Airlines AZ | Transportation & Warehousing | 0 | — | A |
| Frontier Airlines CO | Transportation & Warehousing | 15 | $255,871 | B |
| Frontier Airlines FL | Transportation & Warehousing | 0 | — | D |
| Frontier Airlines GA | Transportation & Warehousing | 0 | — | C |
| Frontier Airlines IL | Transportation & Warehousing | 0 | — | C |
| Frontier Airlines NJ | Transportation & Warehousing | 0 | — | F |
| Frontier Airlines NV | Transportation & Warehousing | 0 | — | D |
| Frontier Airlines PA | Transportation & Warehousing | 0 | — | A |
| Frontier Airlines, Inc. Miami International Airport FL | — | 0 | — | — |
| Frontier Airlines, Inc. Orlando International Airport FL | — | 0 | — | — |
| Frontier Auto Sales, Inc. dba Frontier Toyota CA | — | 0 | — | — |
| Frontier Behavioral Health WA | Healthcare & Social Assistance | 0 | — | F |
| Frontier Bridge Inc OK | Construction | 0 | — | D |
| Frontier Building Products Pacific, Inc CA | Construction | 0 | — | F |
| Frontier Charter Academy OR | Educational Services | 0 | — | A |
| Frontier Communications FL | — | 0 | — | — |
| Frontier Communications ID | — | 0 | — | — |
| Frontier Communications IN | — | 0 | — | — |
| Frontier Communications OH | — | 0 | — | — |
| Frontier Communications OR | — | 0 | — | — |
| Frontier Communications SC | — | 0 | — | — |
| Frontier Communications Corp. (Technical Support Organization) NY | — | 0 | — | — |
| Frontier Communications Corp.-Citezens Telecom Services TX | — | 0 | — | — |
| Frontier Communications Corp.-Citizens Telecom Services TX | — | 0 | — | — |
| Frontier Communications Corporation MO | — | 0 | — | — |
| Frontier Communications Corporations OH | — | 0 | — | — |
| Frontier Communications Parent, Inc. CA | Information & Media | 0 | — | B |
| Frontier Communications Parent, Inc. CT | Information & Media | 0 | — | A |
| Frontier Communications Parent, Inc. FL | Information & Media | 0 | — | A |
| Frontier Communications Parent, Inc. IN | Information & Media | 0 | — | A |
| Frontier Communications Parent, Inc. NY | Information & Media | 0 | — | B |
| Frontier Communications Parent, Inc. TX | Information & Media | 7 | $134,778 | A |
| Frontier Communications Parent, Inc. WV | Information & Media | 0 | — | A |
| Frontier Community Services OH | Healthcare & Social Assistance | 0 | — | F |
| FRONTIER COOLING CA | Agriculture & Forestry | 0 | — | A |
| Frontier Cooperative IA | Manufacturing | 0 | — | F |
| Frontier Dairy, LLC KS | Agriculture & Forestry | 0 | — | A |
| Frontier Dental Laboratories, Inc. CA | Manufacturing | 0 | — | A |
