| Maymont Foundation VA | Arts & Entertainment | 0 | — | C |
| Maynard Electric Company NC | Construction | 0 | — | A |
| Maynard Steel Casting Company WI | Manufacturing | 0 | — | F |
| Maynard Steel Casting So WI | Manufacturing | 0 | — | F |
| Maynard, Inc. AR | Manufacturing | 0 | — | C |
| Mayne Framing Supply Inc WV | Wholesale Trade | 0 | — | C |
| Mayne Pharma NC | Manufacturing | 0 | — | C |
| Mayne Pharma Commercial LLC NC | Manufacturing | 0 | — | A |
| Mayne Street Preschool CA | — | 0 | — | — |
| Mayo MN | — | 0 | — | — |
| Mayo Belle Plaine Clinic MN | — | 0 | — | — |
| Mayo Clinic AZ | Healthcare & Social Assistance | 0 | — | F |
| Mayo Clinic FL | Healthcare & Social Assistance | 0 | — | C |
| Mayo Clinic MN | Healthcare & Social Assistance | 178 | $170,078 | D |
| Mayo Clinic WI | Retail Trade | 0 | — | B |
| Mayo Clinic Caledonia MN | — | 0 | — | — |
| Mayo Clinic Florida Office FL | — | 0 | — | — |
| Mayo Clinic Health System - Franciscan WI | — | 0 | — | — |
| Mayo Clinic Health System - Franscican Healthcare IA | — | 0 | — | — |
| Mayo Clinic Montgomery MN | — | 0 | — | — |
| Mayo Construction ND | Construction | 0 | — | F |
| Mayo Fairmont MN | — | 0 | — | — |
| Mayo Manufacturing MN | Manufacturing | 0 | — | F |
| Mayo Northridge MN | — | 0 | — | — |
| Mayo Springfield Hospital & Clinic & Lamberton Clinic 2019 MN | — | 0 | — | — |
| Mayo St. James MN | — | 0 | — | — |
| Mayo Waseca MN | — | 0 | — | — |
| Mayo4Sam LLC dba P.J. Sweeney's Restaurant & Pub NJ | — | 0 | — | — |
| Mayoka Services, LLC MD | Construction | 0 | — | F |
| Mayor Construction LLC WA | Construction | 0 | — | F |
| Mayor West Coast LLC., dba MWC CA | Transportation & Warehousing | 0 | — | F |
| Mayoral Brothers Inc. CA | Agriculture & Forestry | 0 | — | F |
| Mayrich Construction Corp. NY | — | 0 | — | — |
| Mayrich Equipment Corp. NY | — | 0 | — | — |
| Mayrich Foundation Company LLC NY | — | 0 | — | — |
| Mays Concrete, Inc. CO | Construction | 0 | — | F |
| Mays Home Health of Paris TX, LLC TX | Healthcare & Social Assistance | 0 | — | A |
| Mays Home Health TX, LLC TX | Healthcare & Social Assistance | 0 | — | F |
| Mays Homecall Home Health of Stillwater, LLC OK | Healthcare & Social Assistance | 0 | — | A |
| Mays Hospice Care Inc. OK | Healthcare & Social Assistance | 0 | — | F |
| Mays Housecall Home Health of Ada, LLC OK | Healthcare & Social Assistance | 0 | — | A |
| Mays Housecall Home Health of Antlers, LLC OK | Healthcare & Social Assistance | 0 | — | C |
| Mays Housecall Home Health of Tulsa, LLC OK | Healthcare & Social Assistance | 0 | — | A |
| Mays Housecall of Antlers, LLC OK | Healthcare & Social Assistance | 0 | — | A |
| Mays Plus Inc OK | Healthcare & Social Assistance | 0 | — | F |
| Mays Plus Inc TX | Healthcare & Social Assistance | 0 | — | A |
| Mays Professional Home Health of Sallisaw, LLC OK | Healthcare & Social Assistance | 0 | — | A |
| Mayser MI | Manufacturing | 0 | — | A |
| Maysteel SC | — | 0 | — | — |
| Maysteel WI | Manufacturing | 0 | — | F |
