| Mason Dixon Animal Emergency Hospital PA | Professional & Technical Services | 0 | — | F |
| Mason Dixon Energy Services WV | Construction | 0 | — | A |
| Mason Electric Company CA | Manufacturing | 0 | — | F |
| Mason Express UT | Transportation & Warehousing | 0 | — | A |
| Mason Farms PA | Agriculture & Forestry | 0 | — | F |
| Mason General Contracting CA | Construction | 0 | — | A |
| Mason General Hospital and Clinics WA | Healthcare & Social Assistance | 0 | — | F |
| Mason Health WA | Educational Services | 0 | — | A |
| Mason Health and Rehabilitation Center IN | Healthcare & Social Assistance | 0 | — | F |
| Mason Hotel Associates, LLC OH | Accommodation & Food Services | 0 | — | F |
| Mason Industries Inc NY | Manufacturing | 0 | — | F |
| Mason Livesay Scientific TN | Professional & Technical Services | 0 | — | A |
| Mason Manufacturing, LLC IL | Manufacturing | 0 | — | F |
| Mason Road Sheet Metal TX | Manufacturing | 0 | — | B |
| Mason Structural Steel LLC OH | Retail Trade | 0 | — | B |
| Mason Structure KY | Construction | 0 | — | C |
| Mason Technologies Inc. NY | Construction | 0 | — | B |
| Mason Tractor and Equipment Company, Inc GA | Wholesale Trade | 0 | — | D |
| Mason Transit Authority WA | Transportation & Warehousing | 0 | — | C |
| Mason Trucking Inc UT | Transportation & Warehousing | 0 | — | B |
| Mason Vitamins, Inc. FL | Wholesale Trade | 1 | $86,840 | — |
| Mason's Dozing & Construction, Inc. GA | Construction | 0 | — | F |
| Masonic & Eastern Star Home OR | Healthcare & Social Assistance | 0 | — | F |
| Masonic Care Community NY | Healthcare & Social Assistance | 0 | — | F |
| Masonic Center for Health and Rehab WI | Healthcare & Social Assistance | 0 | — | F |
| Masonic Home of Montana MT | Healthcare & Social Assistance | 0 | — | A |
| 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 GA | Wholesale Trade | 0 | — | A |
| Masonite IA | Manufacturing | 0 | — | F |
| Masonite KS | Manufacturing | 0 | — | C |
| Masonite NC | Manufacturing | 0 | — | F |
| Masonite TN | Manufacturing | 0 | — | D |
| Masonite Archectial NJ | Manufacturing | 0 | — | F |
| Masonite Charlotte NC | Manufacturing | 0 | — | D |
| Masonite Coorporation TX | — | 0 | — | — |
| Masonite Corporation FL | Manufacturing | 1 | $97,682 | A |
| Masonite Corporation KY | — | 0 | — | — |
| Masonite Corporation LA | Manufacturing | 0 | — | A |
| Masonite Corporation MA | Wholesale Trade | 0 | — | F |
| Masonite Corporation MO | — | 0 | — | — |
| Masonite Corporation NJ | Manufacturing | 0 | — | F |
| Masonite Corporation NY | Wholesale Trade | 0 | — | F |
