| American Cementing OH | Mining & Extraction | 0 | — | A |
| American Cementing OK | Mining & Extraction | 0 | — | A |
| American Cementing TX | Mining & Extraction | 0 | — | A |
| American Cementing WY | Mining & Extraction | 0 | — | A |
| American Central Transport, Inc. MO | Transportation & Warehousing | 0 | — | B |
| AMERICAN CHAMPION AIRCRAFT CORP WI | Manufacturing | 0 | — | A |
| AMERICAN CHARMS INC. GA | Retail Trade | 0 | — | D |
| American Chase LLC PA | Professional & Technical Services | 7 | $100,051 | — |
| American Chemet Corporation MT | Manufacturing | 0 | — | F |
| American Chemical Solutions, LLC MI | Manufacturing | 0 | — | F |
| American Chiller Service, Inc. CA | Construction | 0 | — | C |
| AMERICAN CHROME CHICAGO COMPANY IL | Wholesale Trade | 1 | $70,200 | — |
| American Civil Construction, Inc FL | Construction | 0 | — | D |
| AMERICAN CIVIL CONSTRUCTORS WEST COAST CA | Construction | 0 | — | A |
| AMERICAN CIVIL CONSTRUCTORS WEST COAST NC | Construction | 0 | — | A |
| American Cloud, LLC CA | Information & Media | 1 | $80,000 | — |
| American CM Hospice Inc. CA | Healthcare & Social Assistance | 0 | — | F |
| American Coach Leasing Corp NJ | Transportation & Warehousing | 0 | — | F |
| American Coastal Insurance Corp. FL | Professional & Technical Services | 0 | — | A |
| American Coastal Insurance Corp. NY | Finance & Insurance | 0 | — | A |
| American Coil Processing OH | Manufacturing | 0 | — | F |
| American Cold Forge OH | Manufacturing | 0 | — | F |
| American College Education, Inc. CA | Educational Services | 1 | $79,622 | — |
| American College of Radiology PA | — | 0 | — | — |
| American College of Radiology VA | Professional & Technical Services | 5 | $136,337 | — |
| American Colloid Company PA | Manufacturing | 0 | — | F |
| AMERICAN COLORS OH | Manufacturing | 0 | — | D |
| American Comb Corp NJ | Wholesale Trade | 0 | — | C |
| American Combustion Industries, Inc. MD | Construction | 0 | — | C |
| American Combustion Service, Inc. IL | Construction | 0 | — | A |
| American Commercial Barge Line IL | Transportation & Warehousing | 0 | — | A |
| American Commercial Barge Line IN | Transportation & Warehousing | 0 | — | A |
| American Commercial Barge Line LA | Transportation & Warehousing | 0 | — | A |
| American Commercial Barge Line MO | Transportation & Warehousing | 0 | — | A |
| American Commercial Barge Line TN | Transportation & Warehousing | 0 | — | A |
| American Commercial Barge Line TX | Transportation & Warehousing | 0 | — | A |
| American Commercial Barge Line (ACBL) IL | Transportation & Warehousing | 0 | — | A |
| American Commercial Barge Line (ACBL) IN | Transportation & Warehousing | 0 | — | A |
| American Commercial Barge Line (ACBL) LA | Transportation & Warehousing | 0 | — | A |
| American Commercial Barge Line (ACBL) MO | Transportation & Warehousing | 0 | — | A |
| American Commercial Barge Line (ACBL) TN | Transportation & Warehousing | 0 | — | A |
| American Commercial Barge Line (ACBL) TX | Transportation & Warehousing | 0 | — | A |
| American Commercial College-Lubbock TX | — | 0 | — | — |
| American Commercial College-Odessa TX | — | 0 | — | — |
| American Commercial College-San Angelo TX | — | 0 | — | — |
| American Commercial College-Wichita Falls TX | — | 0 | — | — |
| American Commercial Industrial Electric LLC TN | Construction | 0 | — | A |
| American Communications Construction Inc. TX | Construction | 0 | — | B |
| American Community Mutual Insurance Co. MI | — | 0 | — | — |
| American Compaction Equipment, INC. CA | Manufacturing | 0 | — | A |