| Menasha Corporation PAC
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| Menominee Cty Republican Party
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| Menominee Indian Tribe PAC
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| Menomonee Falls Taxpayers Association
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| Merck Sharp & Dohme Corp (Corporation)
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| Metcalfe for State Senate
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| MetLife PAC (Federal)
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| Metro Milw. Citizens Resp Govt
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| Metro Milwaukee Association of Commerce
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| Metropolitan Life Insurance
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| Metropolitan Milwaukee Association of Commerce PAC
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| Meyer Campaign Committee
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| Meyer for Assembly
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| Meyerhofer for Assembly
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| MG&E Credit Union (Corporation)
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| Michael Best & Friedrich (Corporation)
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| Michael R Jones for School Board (Local - Muskego-Norway School Board)
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| Michael Schraa for Assembly
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| Michael Schutz Campaign Fund (Local-Cross Plains, WI)
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| Michael Zeidler Comm
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