| Masco Retail Cabinet Group OH | - | 0 | - | - |
| Masco Support Services IN | - | 0 | - | - |
| Mascot Softwares LLC. NJ | Professional & Technical Services | 1 | $110,000 | - |
| MASE Insights LLC PA | Professional & Technical Services | 8 | $92,000 | - |
| Maserati North America NJ | - | 0 | - | - |
| MASH Associates LLC TX | - | 1 | $118,500 | - |
| Mashable, Inc. NY | - | 0 | - | - |
| Mashantucket Pequot Tribal Nation CT | Public Administration | 0 | - | C |
| Mashgin Inc. CA | - | 1 | $160,000 | - |
| Mashwork, Inc. NY | Professional & Technical Services | 1 | $153,000 | - |
| Masimo Americas, Inc. CA | Manufacturing | 5 | $131,248 | - |
| Masimo Corporation CA | Wholesale Trade | 19 | $142,469 | A |
| Masimo Technology Cafe LLC CA | - | 1 | $72,446 | - |
| Masis Staffing Solutions MA | Administrative & Waste Services | 0 | - | A |
| Mask Transport, LLC. OR | Transportation & Warehousing | 0 | - | F |
| Maslow Media Company MI | - | 0 | - | - |
| Maslow Media Group WA | - | 0 | - | - |
| Maslow Media Group NM | - | 0 | - | - |
| Maslow Media Group NY | - | 0 | - | - |
| Maslow Media Group LLC dba Al Jazeera America LLC LA | - | 0 | - | - |
| Maslow Media Group, Inc. WI | - | 0 | - | - |
| Maslow Media Group, Inc. CA | - | 0 | - | - |
| Maslow Media Group, Inc. Al Jazeera America, LLC FL | - | 0 | - | - |
| Mason America, Inc. WA | Professional & Technical Services | 1 | $184,662 | - |
| Mason Brothers MN | Wholesale Trade | 1 | $125,029 | - |
| Mason City Clinic, P.C. IA | - | 0 | - | - |
| Mason Companies Inc WI | Management of Companies | 0 | - | F |
| Mason County Forest Products WA | - | 0 | - | - |
| Mason Dental, P.C. VT | Healthcare & Social Assistance | 1 | $155,875 | - |
| Mason Dental, P.C. VT | - | 1 | $152,360 | - |
| Mason District Hospital IL | Healthcare & Social Assistance | 0 | - | F |
| Mason Dixon Animal Emergency Hospital PA | Professional & Technical Services | 0 | - | F |
| Mason Electric Company CA | Manufacturing | 0 | - | F |
| Mason Farms PA | Agriculture & Forestry | 0 | - | - |
| Mason General Hospital and Clinics WA | Healthcare & Social Assistance | 0 | - | F |
| Mason Industries Inc NY | Manufacturing | 0 | - | F |
| Mason Manufacturing, LLC IL | Manufacturing | 0 | - | F |
| Mason Technologies Inc. NY | Construction | 1 | $100,901 | B |
| Mason Vitamins, Inc. FL | Wholesale Trade | 1 | $86,840 | - |
| Masonic Care Community NY | Healthcare & Social Assistance | 0 | - | F |
| Masonic Homes of Kentucky KY | Management of Companies | 0 | - | F |
| Masonic Medical Research Laboratory NY | Professional & Technical Services | 1 | $72,925 | - |
| Masonic Village NJ | Healthcare & Social Assistance | 0 | - | A |
| Masonic Village of the Grand Lodge of Pa PA | Healthcare & Social Assistance | 0 | - | F |
| Masonic Villages of the Grand Lodge of Pa PA | Healthcare & Social Assistance | 0 | - | F |
| Masonicare Corporation CT | Healthcare & Social Assistance | 0 | - | F |
| Masonicare Partners Home Health and Hospice CT | - | 0 | - | - |
| Masonico LLC MI | - | 0 | - | - |
| Masonite AL | Manufacturing | 0 | - | B |
| Masonite IA | Manufacturing | 0 | - | F |