| Missouri Cobalt, LLC MO | Mining & Extraction | 1 | $185,000 | — |
| Missouri Community Improvement Industries, Inc (MCII) MO | Healthcare & Social Assistance | 0 | — | A |
| MISSOURI DELTA MEDICAL CENTER MO | Healthcare & Social Assistance | 2 | $375,000 | B |
| Missouri Drywall Supply Inc MO | Wholesale Trade | 0 | — | F |
| Missouri History Museum MO | Arts & Entertainment | 0 | — | A |
| Missouri Hotel Partners, LLC IN | Accommodation & Food Services | 0 | — | A |
| Missouri Lions Eye Research Foundation IL | Healthcare & Social Assistance | 0 | — | A |
| Missouri Lions Eye Research Foundation KS | Healthcare & Social Assistance | 0 | — | A |
| Missouri Lions Eye Research Foundation MO | Healthcare & Social Assistance | 0 | — | D |
| Missouri Metals MO | Manufacturing | 0 | — | A |
| Missouri Military Academy MO | Educational Services | 3 | $48,618 | — |
| Missouri Organic Recycling MO | Wholesale Trade | 0 | — | F |
| Missouri Petroleum MO | Construction | 0 | — | A |
| Missouri Prime Beef MO | Administrative & Waste Services | 0 | — | A |
| Missouri Prime Beef Packers MO | — | 0 | — | — |
| Missouri Rehabilitation Center MO | — | 0 | — | — |
| Missouri Residential Care MO | Healthcare & Social Assistance | 0 | — | A |
| MISSOURI RIVER CONTRACTORS LLC MT | Construction | 0 | — | F |
| MISSOURI RURAL ELECTRIC COOPERATIVE MO | Utilities | 0 | — | A |
| Missouri Slope Lutheran Care Center Inc. ND | Healthcare & Social Assistance | 1 | $84,968 | F |
| Missouri Smelting Technology TN | Manufacturing | 0 | — | B |
| Missouri Southern Seed Corp MO | Wholesale Trade | 0 | — | A |
| Missouri Southern State University MO | Educational Services | 3 | $56,536 | — |
| Missouri State Univeristy MO | Educational Services | 2 | $67,437 | — |
| Missouri State University MO | Educational Services | 7 | $91,959 | — |
| Missouri Thistle, Inc. MO | Manufacturing | 0 | — | F |
| Missouri Tooling & Automation MO | Manufacturing | 0 | — | F |
| Missouri Valley Family YMCA ND | Healthcare & Social Assistance | 0 | — | F |
| Missouri Valley, Inc. TX | Construction | 0 | — | A |
| Missouri Walnut MO | — | 0 | — | — |
| Missouri Western State University MO | Educational Services | 3 | $78,188 | — |
| Missouri-Pacific Lumber MO | Manufacturing | 0 | — | C |
| Mister Kleen Maintenance Co, Inc. VA | Administrative & Waste Services | 0 | — | B |
| Mister Landscaper FL | Retail Trade | 0 | — | A |
| Mister P Express IN | Transportation & Warehousing | 0 | — | F |
| Mister Pizza, Inc. IA | Accommodation & Food Services | 0 | — | A |
| MISTER PRICE, INC. PR | Wholesale Trade | 0 | — | F |
| Mister Sparky Electric CO | Construction | 0 | — | F |
| Mister Sparky Electric GA | Construction | 0 | — | F |
| Mister Sparky Electric IN | Construction | 0 | — | F |
| Mister Sparky Electric OH | Construction | 0 | — | A |
| Mister Sparky Electric PA | Construction | 0 | — | F |
| Mistica Foods, LLC IL | Manufacturing | 0 | — | A |
| Mistick Construction PA | Construction | 0 | — | F |
| Mistral AI, Inc. CA | Information & Media | 4 | $288,750 | — |
| Mistral Inc. MD | Manufacturing | 0 | — | F |
| Mistras Group, Inc. and subsidiary Quality Services Laboratories In AK | — | 0 | — | — |
| Mistro, Inc. CA | Information & Media | 1 | $131,082 | — |
| Misty Harbor IA | — | 0 | — | — |
| Misty Willow Healthcare Inc. TX | Healthcare & Social Assistance | 0 | — | A |
