Politics and Business magazines
- Marshfield Clinic Inc.
- Martek Biosciences Corporation
- Martell and Company S.A.
- Marten Transport, Ltd.
- Martha Stewart Living Omnimedia, L.L.C.
- Martignetti Companies
- Martin Franchises, Inc.
- Martin Industries, Inc.
- Martin Marietta Corporation
- Martin-Baker Aircraft Company Limited
- Martini & Rossi SpA
- Martz Group
- Marubeni Corporation
- Marubeni K.K.
- Maruha Group Inc.
- Marui Co., Ltd.
- Marui Company Ltd
- Maruzen Co., Limited
- Marvel Entertainment Group, Inc.
- Marvel Entertainment, Inc.