M
| M&M Office Interiors Corp. | Pewaukee |
| M.A. Mortenson Company | Brookfield |
| Machare and Associates, Inc. | Mequon |
| Machine Service, Inc. | Green Bay |
| MAD Typing and Consulting (MADTC) | Sun Prairie |
| MadCity | Madison |
| MadCityMatch.com | Madison | ||||
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| Madison Gas and Electric (MGE) | Madison |
| Madison Metro | Madison |
| Madison Newspapers, Inc. | Madison |
| Madison Valuation Associates | Madison |
| Magna Publications, Inc. | Madison |
| Mahler Enterprises Inc. | Milwaukee |
| Mahuta Tool Corporation | Germantown |
| Maier McIlnay & Schmitt Ltd. | Grafton |
| Main Street Industries | Madison |
| Malcom Marketing Communications | Madison |
| Management Decisions, Inc. | Milwaukee |
| Management Solutions International | Cedarburg |
| Mandel Group, Inc | Milwaukee |
| Manitowoc County Job Center | Manitowoc |
| Manpower Inc | Milwaukee |
| Manutec, Inc | Milwaukee |
| Marathon Electric Mfg. Corp. | Wausau |
| Marcus Corp | Milwaukee |
| Marine Travelift, Inc. | Sturgeon Bay |
| Marinette Marine Corp. | Marinette |
| Mark D. Olejniczak Realty, Inc. | Green Bay |
| Marketing Images, Inc. | Waukesha |
| Marketing Services, Inc. | Milwaukee |
| The Marquette County Tribune | Montello |
| Marquette Electronics, Inc. | Milwaukee |
| Marshall & Ilsley Corp | Milwaukee |
| Marshfield Area Chamber of Commerce | Marshfield |
| Martech Assemblies | Grafton |
| Marten Transport Ltd. | Mondovi |
| Martin Petersen Co. Inc. | Kenosha |
| Martin Schreiber & Associates | Milwaukee |
| Master Appliance Corp. | Racine |
| Master Lock Co. | Milwaukee |
| Material Interface, Inc. | Sussex |
| Mautz Paint Company | Madison |
| Max Network | Milwaukee |
| Max Weiss Co., Inc. | Milwaukee |
| Maynard Steel Casting Co. | Milwaukee |
| Maysteel Corp. | Menomonee Falls |
| M-B Companies, Inc. | New Holstein |
| MC2, Inc. | Milwaukee |
| McBee | Racine |
| McClure Engineering Associates, Inc. | Milwaukee |
| McFarlane Manufacturing Company, Inc. | Sauk City |
| McGlinchey & Associates | Brookfield |
| McKey Perforating Co., Inc. | New Berlin |
| McMillan Electric Co. | Woodville |
| MDM Cleaning Service | Milwaukee |
| Medalist Hardware, Inc. | |
| Media Movers | Delafield |
| Megal Development Corporation | Milwaukee |
| MEGTEC Systems | De Pere |
| Mehmert Store Services | Sussex |
| Meltric Corporation | Franklin |
| Menasha Corp | Neenah |
| Mequon Open MRI | Mequon |
| Merge Technologies Inc | Milwaukee |
| Mericle Internet Consulting | Madison |
| Merit Financial Services | Milwaukee |
| Meriter | Madison |
| Merrill Manufacturing Corporation | Melville |
| Metalcraft of Mayville, Inc. | Mayville |
| Metal-Era, Inc | Waukesha |
| Metalspun Products | Oak Creek |
| Metavante | Milwaukee |
| MetLife Financial Services | Milwaukee |
| Metro Builders Association | Waukesha |
| Metro Business Publications, Inc. | Milwaukee |
| Metro Mortgage Co., Inc. | Madison |
| Metso Minerals Industries, Inc. | Milwaukee |
| Metso Paper USA | Appleton |
| Meyer & Wallis | Milwaukee |
| Meyer Retaining Ring Company, Inc. | Milwaukee |
| MGIC Investment | Milwaukee |
| MGS Manufacturing Group Inc. | Germantown |
| MHTC.Net | Mount Horeb |
| Michael Best & Friedrich | Milwaukee |
| Micro Estimating Systems Inc. | New Berlin |
| Mid-City Blue, Inc. | Milwaukee |
| Midland Builders | Madison |
| Midland Paper Company | Wheeling |
| Midland Video Productions | Milwaukee |
| Mid-States Aluminum Corp. | Fond Du Lac |
| Midwest Cutting Tools Inc. | Waukesha |
| Midwest Concrete | Dodgeville |
| Midwest Engineering Services, Inc. | Waukesha |
| Midwest Express Airlines, Inc. | Oak Creek |
| Miller Electric Manufacturing Co. | Appleton |
| Milmark Hotel/Motel Investments | Brookfield |
| Milprint, Inc. | Oshkosh |
| Milwaukee Electric Tool Corp. | Brookfield |
| Milwaukee Forge | Milwaukee |
| Milwaukee Journal Sentinel | Milwaukee |
| Milwaukee Valve Co. | Milwaukee |
| The Milwaukee Wave | Milwaukee |
| The Milwaukee Women’s Center, Inc. | Milwaukee |
| Minacs Worldwide | Milwaukee |
| Ministry Health Care | Milwaukee |
| Mirro Co | Manitowoc |
| Mitchell Company | |
| Mitchell Metal Products, Inc. | Merrill |
| Modern Business Technology | Madison |
| Modern Equipment Co., Inc. | Port Washington |
| Modern Plastic Design Acrylics | Madison |
| Modine Manufacturing Co | Racine |
| Monarch Corporation | Milwaukee |
| Monopanel Technologies, Inc. | West Allis |
| Monterey Inc. | Janesville |
| Moore-Response Marketing | Green Bay |
| Morre Appraisal, Inc. | Elm Grove |
| Morris Material Handling, Inc. | Oak Creek |
| The Morrison Group | New Berlin |
| Mortara Instrument | Milwaukee |
| Mortgage One Financial Services | Madison |
| Motor Castings Co. | Milwaukee |
| MP Metal Products, Inc. | Ixonia |
| MPE Inc. | Milwaukee |
| MTE Corp. | Menomonee Falls |
| MTM, Inc. | Madison |
| Multi Products Co., Inc. | Racine |
| Murphy Associates | Brookfield |
| Murphy’s Auction Services | Delavan |
| Murray Hill Pottery Works | Milwaukee |
| My Natural Supplements | Stevens Point |
| MyWeather LLC | Madison |
N
| Nasco | Fort Atkinson |
| National Benefit Consultants | Brookfield |
| National Business Furniture | Milwauke |
| Natural Resource Technology Inc. | Pewaukee |
| Neenah Printing | Neenah |
| Nelson Industries, Inc. | Stoughton |
| Nemesis Networks, Inc. | Madison |
| Neohapsis | Milwaukee |
| Nercon Engineering & Mfg. Inc. | Oshkosh |
| NetCentric Data Solutions Company | La Crosse |
| NetSolutions Corporation | Milwaukee |
| N.E.W. Contracting Services, Inc. | Appleton |
| New Horizons Computer Learning Centers | Wauwatosa |
| New London Engineering | New London |
| New Rail Creative | Milwaukee |
| New Resources Corporation | Milwaukee |
| New Theory Procucts | Madison |
| Newell Rubbermaid | Freeport, IL |
| Newtek Merchant Solutions | New Berlin |
Brookfield |
| The Nicholas Company | Milwaukee |
| Niro, Inc. | Hudson |
| NMT Corporation | La Crosse |
| Nobles Manufacturing, Inc. | St. Croix Falls |
| Noelle Design | Madison |
| Norback, Ley & Associates LLC | Middleton |
| Nor-Lake Foodservice | Hudson |
| Norlight Telecommunications | Brookfield |
| North American BioIndustries Corp. | New Berlin |
| North Side Lumber and Fuel Co | Milwaukee |
| Northern Capital | Milwaukee |
| Northern Engraving Corp. | Sparta |
| Northern Labs, Inc. | Manitowoc |
| Northern Micrographics | La Crosse |
| Northern Oak Private Equity | Milwaukee |
| Northern Trust Corporation | Milwaukee |
| Northern Wisconsin Real Estate | Rhinelander |
| Northstar Print Group | Milwaukee |
| Northstar Real Estate and Development | St. Germain |
| Northwind Technical Services, Inc. | Delafield |
| NOVA Systems, Inc. | Milwaukee |
| Novagen, Inc. | Madison |
| NovoPrint USA Inc. | Milwaukee |
| NSD Consulting Inc. | Milwaukee |
