| Mary Goss Nursing Home LA | Healthcare & Social Assistance | 0 | — | F |
| Mary Gran Nursing Center NC | Healthcare & Social Assistance | 0 | — | F |
| Mary Greeley Medical Center IA | Healthcare & Social Assistance | 2 | $63,045 | F |
| Mary Health of the Sick Convalescent & Nursing Hospital Inc CA | Healthcare & Social Assistance | 0 | — | F |
| MARY HEALTH OF THE SICK CONVALESCENT AND NURSING HOSPITAL INC CA | Healthcare & Social Assistance | 0 | — | F |
| MARY HITCHCOCK MEMORIAL HOSPITAL NH | Healthcare & Social Assistance | 14 | $63,142 | F |
| Mary Kay, Inc. TX | Manufacturing | 0 | — | A |
| Mary Lawrence Corp. NJ | Retail Trade | 0 | — | B |
| Mary Rutan Hospital OH | Healthcare & Social Assistance | 1 | $410,000 | — |
| Mary Wade Home CT | Healthcare & Social Assistance | 0 | — | F |
| Mary Washington Healtcare VA | Healthcare & Social Assistance | 0 | — | F |
| Mary Washington Healthcare VA | Healthcare & Social Assistance | 1 | $325,000 | F |
| Mary Washington Healthcare Physicians VA | Healthcare & Social Assistance | 4 | $366,250 | — |
| Mary's Gone Crackers NV | Manufacturing | 0 | — | F |
| Mary's Tack and Feed CA | Retail Trade | 0 | — | B |
| Marycrest Mano CA | Healthcare & Social Assistance | 0 | — | F |
| Maryfield Inc NC | Healthcare & Social Assistance | 0 | — | F |
| Maryhaven OH | Healthcare & Social Assistance | 0 | — | D |
| Maryhaven Center of Hope NY | Healthcare & Social Assistance | 0 | — | F |
| Maryhaven Center of Hope Inc. (Children's Residential Program, Boy's Dormitory, Young Men's Dormitory, Center Dormitory and CRP House A and C - Port Jefferson) NY | — | 0 | — | — |
| Maryhaven Center of Hope, Inc. (Vocational Rehabilitation and Day Habilitation Transportation Services Dept.) NY | — | 0 | — | — |
| Maryhill Manor, Inc. WI | Healthcare & Social Assistance | 0 | — | F |
| Maryhurst KY | Healthcare & Social Assistance | 0 | — | F |
| Maryland Academy of Sciences MD | Arts & Entertainment | 0 | — | A |
| Maryland American Water MD | Utilities | 0 | — | A |
| Maryland and Virginia Milk Producers Cooperative Association, Inc. dba Maola MD | — | 0 | — | — |
| Maryland Applicators, Inc. MD | Construction | 0 | — | A |
| Maryland Cinema Investments, LLC d/b/a Cinépolis MD | — | 0 | — | — |
| Maryland Cleaning & Abatement Services Corp MD | Administrative & Waste Services | 0 | — | A |
| Maryland Coalition of Families MD | — | 0 | — | — |
| Maryland Department of Health MD | Public Administration | 1 | $62,754 | — |
| Maryland Department of Public Safety & Correctional Services MD | Public Administration | 0 | — | D |
| Maryland Department of Public Safety and Correctional Services MD | Public Administration | 0 | — | F |
| Maryland Department of Transportation Maryland Port Administration MD | Public Administration | 0 | — | C |
| Maryland Electric Company LLC. TN | Construction | 0 | — | D |
| Maryland Gardens Post Acute AZ | Healthcare & Social Assistance | 0 | — | F |
| Maryland Health Ent. MD | Management of Companies | 0 | — | A |
| Maryland Health Enterprises MD | Healthcare & Social Assistance | 0 | — | F |
| Maryland Home Care Solutions, Inc. MD | Healthcare & Social Assistance | 0 | — | F |
| Maryland Management Company MD | Real Estate | 0 | — | A |
| Maryland Mechanical Systems Inc MD | Construction | 0 | — | A |
| Maryland Medical First, P.A. MD | Healthcare & Social Assistance | 7 | $237,857 | — |
| Maryland Paper Company AL | Manufacturing | 0 | — | A |
| Maryland Paper Company CA | Manufacturing | 0 | — | F |
| Maryland Paper Company MD | Manufacturing | 0 | — | F |
| Maryland Paper Company WV | Manufacturing | 0 | — | A |
| Maryland Portable Concrete MD | Manufacturing | 0 | — | F |
| Maryland Sportservice, Inc. MD | — | 0 | — | — |
| Maryland University of Integrative Health, Inc. MD | — | 0 | — | — |
| Maryland Vascular Specialists MD | Healthcare & Social Assistance | 0 | — | A |
