| Mid-West Machine Products, inc. CO | Manufacturing | 0 | — | F |
| Mid-West Mfg, LLC IL | Manufacturing | 0 | — | F |
| Mid-West Moving & Storage, Inc. IL | Transportation & Warehousing | 0 | — | A |
| Mid-West Spring & Stamping IN | Manufacturing | 0 | — | F |
| MID-WOOD INC OH | Wholesale Trade | 0 | — | F |
| MIDA Industries, Inc. CA | — | 0 | — | — |
| MidAmerica Bedding, Inc WI | Manufacturing | 0 | — | F |
| MidAmerican Energy Company IA | Utilities | 6 | $49,717,330 | D |
| MidAmerican Energy Company IL | Utilities | 0 | — | A |
| MidAmerican Energy Company SD | Utilities | 0 | — | A |
| Midas Management & Research TX | Professional & Technical Services | 1 | $130,915 | — |
| Midas Trucking Inc CA | Transportation & Warehousing | 0 | — | F |
| Midatlantic Albertsons PA | Transportation & Warehousing | 0 | — | C |
| MidAtlantic Construction, Inc. PA | Construction | 0 | — | A |
| MidAtlantic Cooperative Solutions PA | Manufacturing | 0 | — | F |
| MidCarolina Pediatrics, P.A. NC | Healthcare & Social Assistance | 1 | $68,640 | — |
| Midco International Inc. IL | Manufacturing | 0 | — | F |
| Midco Sales, LLC AZ | Retail Trade | 0 | — | F |
| Midcoast - 123 Med ME | Healthcare & Social Assistance | 0 | — | F |
| Midcoast - 60 Baribeau ME | Healthcare & Social Assistance | 0 | — | A |
| Midcoast TOHC ME | Real Estate | 0 | — | F |
| Midcon Cables Company MO | Manufacturing | 0 | — | F |
| Midcon Cables Company SC | Manufacturing | 0 | — | D |
| MidCon Services, LLC TX | Transportation & Warehousing | 0 | — | B |
| Midcon Underground Construction Inc. NE | Construction | 0 | — | A |
| Midcontinent Communications MN | Information & Media | 0 | — | A |
| Midcontinent Communications SD | Information & Media | 3 | $58,726 | — |
| Midcontinent Independent System Operator, Inc. IN | Utilities | 5 | $138,755 | — |
| Midcontinent Media, Inc. MN | Information & Media | 0 | — | F |
| Middle Creek Swine, LLC. IL | Agriculture & Forestry | 0 | — | F |
| Middle East Bakery, Inc. MA | Manufacturing | 0 | — | A |
| Middle Georgia Electric Membership Coorperation GA | Utilities | 0 | — | F |
| MIDDLE GEORGIA STATE UNIVERSITY GA | Educational Services | 2 | $67,943 | — |
| Middle Kentucky CAP, Inc KY | Healthcare & Social Assistance | 0 | — | F |
| Middle Kentucky Community Action Partnership, Inc. KY | Healthcare & Social Assistance | 0 | — | D |
| Middle Peninsula Northern Neck Community Services Board VA | Healthcare & Social Assistance | 0 | — | C |
| Middle River Aerostructure Systems MD | Manufacturing | 1 | $72,467 | — |
| Middle River Marine IL | Transportation & Warehousing | 0 | — | B |
| Middle Tennessee Electric Membership Corporation TN | Utilities | 0 | — | F |
| Middle Tennessee Lumber Company TN | Manufacturing | 0 | — | F |
| Middle Tennessee Natural Gas TN | Utilities | 0 | — | A |
| Middle Tennessee Natural Gas Utility District TN | Utilities | 0 | — | F |
| Middle Tennessee State University TN | Educational Services | 2 | $92,121 | — |
| Middle TN Electric Membership Corporation TN | Utilities | 0 | — | F |
| Middle West Mfg Corp. WI | Manufacturing | 0 | — | A |
| Middleburg Animal Hospital VA | Professional & Technical Services | 0 | — | A |
| Middlebury Cheese Company, LLC IN | Manufacturing | 0 | — | D |
| Middlebury Convalescent Home, Incorporated CT | Healthcare & Social Assistance | 0 | — | F |
| Middlebury Electric, Inc. IN | Construction | 0 | — | A |
| Middlebury Institute of International Studies at Monterey CA | — | 0 | — | — |
