Businesses and Occupations
- Marsh & McLennan Companies, Inc.
- Marsh Supermarkets Inc
- Martha Stewart Living Omnimedia Inc
- Mary Kay Inc
- Marzotto S.p.A
- Masco Corp
- Massachusetts Mutual Life Insurance Company
- MasTec Inc
- Matsushita Electric Industrial Co. Ltd
- Matsushita Electric Works Ltd
- Mattel Inc
- Matthews International Corp
- Maxicare Health Plans Inc
- Maxwell Communication Corp. plc
- Mayo Foundation
- Maytag Corp
- Mazda Motor Corp
- MBNA Corp
- McCormick & Company, Inc.
- McDermott International Inc