Donations made to political groups or candidates must be disclosed under state law for greater transparency in elections. While Congress created the Federal Election Commission to oversee federal elections in 1974, each state is left to regulate its local elections.
| Rank | Contributor | Committee | Amount | Date |
|---|---|---|---|---|
| 1 | DPW - Federal Account | Assembly Democratic Camp Comm | $400,000 | 10/23/2020 |
| 2 | America Votes Action Fund | A Better Wisconsin Together Political Fund | $280,000 | 10/19/2020 |
| 3 | Democratic Party of Wisconsin | Assembly Democratic Camp Comm | $225,338 | 10/19/2020 |
| 4 | Herbert H. Kohl | Democratic Party of Wisconsin | $200,000 | 10/19/2020 |
| 4 | Representative Assembly Campaign Com RACC | Republican Party of Wisconsin | $200,000 | 10/21/2020 |
| 6 | Democratic Party of Wisconsin | Hansen for Wisconsin | $175,000 | 10/24/2020 |
| 7 | Democratic Party of Wisconsin | Piotrowski for State Senate | $150,000 | 10/23/2020 |
| 8 | Committee to Elect a Republican Senate | Friends of Eric Wimberger | $135,800 | 10/20/2020 |
| 9 | Democratic Party of Wisconsin | Kriss Marion for SW Wisconsin | $132,000 | 10/23/2020 |
| 10 | Republican Party of Wisconsin | Jim Ott for Assembly | $99,200 | 10/22/2020 |
| 11 | Committee to Elect a Republican Senate | Testin for Senate | $98,320 | 10/20/2020 |
| 12 | Committee to Elect a Republican Senate | Friends of Alberta Darling | $83,850 | 10/20/2020 |
| 13 | Democratic Party of Wisconsin | Kriss Marion for SW Wisconsin | $75,000 | 10/18/2020 |
| 13 | Democratic Party of Wisconsin | Friends of Jessica Katzenmeyer | $75,000 | 10/20/2020 |
| 13 | Democratic Party of Wisconsin | DanSchierlForAssembly55 | $75,000 | 10/20/2020 |
| 13 | Democratic Party of Wisconsin | Perry for Wisconsin | $75,000 | 10/20/2020 |
| 13 | Democratic Party of Wisconsin | August for Assembly | $75,000 | 10/20/2020 |
| 13 | Democratic Party of Wisconsin | Joel for Wisconsin | $75,000 | 10/20/2020 |
| 13 | Democratic Party of Wisconsin | Friends of Kathy Hinkfuss | $75,000 | 10/20/2020 |
| 13 | Democratic Party of Wisconsin | Brooks for Assembly | $75,000 | 10/20/2020 |
| 13 | Democratic Party of Wisconsin | Winker for Wisconsin | $75,000 | 10/20/2020 |
| 13 | Democratic Party of Wisconsin | Friends of Sarah for Assembly | $75,000 | 10/20/2020 |
| 13 | Democratic Party of Wisconsin | Friends of Jacob Malinowski | $75,000 | 10/22/2020 |
| 24 | Representative Assembly Campaign Com RACC | Friends & Neighbors of Robin Vos | $71,000 | 10/20/2020 |
| 25 | Representative Assembly Campaign Com RACC | Novak For Assembly | $70,000 | 10/23/2020 |
| 26 | Representative Assembly Campaign Com RACC | Macco for Wisconsin | $60,000 | 10/19/2020 |
| 26 | Representative Assembly Campaign Com RACC | Friends for Jessie | $60,000 | 10/19/2020 |
| 28 | Dominic Orr | Democratic Party of Wisconsin | $50,000 | 10/19/2020 |
| 29 | Representative Assembly Campaign Com RACC | Friends of Rachael Cabral Guevara | $42,100 | 10/24/2020 |
| 30 | Representative Assembly Campaign Com RACC | Steffen for Wisconsin | $40,200 | 10/24/2020 |
| 31 | Assembly Democratic Camp Community | Friends of Jessica Katzenmeyer | $40,000 | 10/19/2020 |
| 31 | Assembly Democratic Camp Community | August for Assembly | $40,000 | 10/20/2020 |
| 31 | Assembly Democratic Camp Community | DanSchierlForAssembly55 | $40,000 | 10/20/2020 |
| 31 | Assembly Democratic Camp Community | Winker for Wisconsin | $40,000 | 10/21/2020 |
| 35 | Representative Assembly Campaign Com RACC | Macco for Wisconsin | $36,000 | 10/21/2020 |
| 36 | WMC Issues Mobilization Council | WMC Jobs Fund | $35,000 | 10/19/2020 |
| 37 | Republican Party of Wisconsin | Friends of Alberta Darling | $33,818 | 10/22/2020 |
| 38 | Assembly Democratic Camp Community | Friends of Kathy Hinkfuss | $30,000 | 10/20/2020 |
| 38 | Assembly Democratic Camp Community | Joel for Wisconsin | $30,000 | 10/23/2020 |
| 38 | Representative Assembly Campaign Com RACC | Friends for Jessie | $30,000 | 10/21/2020 |
| 38 | Representative Assembly Campaign Com RACC | Friends for Jessie | $30,000 | 10/23/2020 |
| 38 | Republican Party of Wisconsin | Knodl Assembly 24 | $30,000 | 10/24/2020 |
| 43 | Drive Pac | D R I V E - Democrat Republican Independent Voter Education | $29,000 | 10/19/2020 |
| 44 | Assembly Democratic Camp Community | Kriss Marion for SW Wisconsin | $25,000 | 10/18/2020 |
| 44 | Hintz for Assembly | Assembly Democratic Camp Comm | $25,000 | 10/21/2020 |
| 46 | Representative Assembly Campaign Com RACC | Macco for Wisconsin | $20,000 | 10/23/2020 |
| 46 | WMC Issues Mobilization Council | WMC Jobs Fund | $20,000 | 10/19/2020 |
| 48 | Republican Party of Wisconsin | Testin for Senate | $18,224 | 10/22/2020 |
| 49 | Committee to Elect Joan Ballweg | Republican Party of Wisconsin | $15,838 | 10/21/2020 |
| 50 | Democratic Party of Wisconsin | Kristin Lyerly for State Assembly | $15,573 | 10/22/2020 |
| 51 | Democratic Party of Wisconsin | Friends Of Steve Doyle | $15,488 | 10/22/2020 |
| 52 | Assembly Democratic Camp Community | Meyers for Assembly | $15,000 | 10/19/2020 |
| 52 | Assembly Democratic Camp Community | DanSchierlForAssembly55 | $15,000 | 10/23/2020 |
| 52 | Assembly Democratic Camp Community | Winker for Wisconsin | $15,000 | 10/23/2020 |
| 52 | Assembly Democratic Camp Community | Friends of Sarah for Assembly | $15,000 | 10/23/2020 |
| 52 | Assembly Democratic Camp Community | Friends of Jessica Katzenmeyer | $15,000 | 10/23/2020 |
| 52 | Citizens for Dale Kooyenga | Committee to Elect a Republican Senate | $15,000 | 10/19/2020 |
| 52 | Citizens for Tiffany | Committee to Elect a Republican Senate | $15,000 | 10/23/2020 |
| 52 | Friends of Mary | Committee to Elect a Republican Senate | $15,000 | 10/23/2020 |
| 52 | St. Croix County Republican Party | Taxpayers for Stafsholt | $15,000 | 10/19/2020 |
| 52 | Taxpayers for Kapenga | Committee to Elect a Republican Senate | $15,000 | 10/19/2020 |
| 62 | Republican Party of Wisconsin | Kapanke for Senate | $13,424 | 10/21/2020 |
| 63 | Democratic Party of Wisconsin | Friends of Sarah for Assembly | $12,960 | 10/19/2020 |
| 63 | Friends of Sarah for Assembly | Democratic Party of Wisconsin | $12,960 | 10/19/2020 |
| 65 | Jonathan Eder | State Senate Democratic Comm | $12,500 | 10/22/2020 |
| 65 | Keith Gilkes | Committee to Elect a Republican Senate | $12,500 | 10/19/2020 |
| 67 | Democratic Party of Wisconsin | Amanda WhiteEagle for Wisconsin | $12,416 | 10/22/2020 |
| 68 | Future Now Fund | Assembly Democratic Camp Comm | $12,000 | 10/22/2020 |
| 68 | Future Now Fund | Democratic Party of Wisconsin | $12,000 | 10/22/2020 |
| 68 | International Association of Fire Fighters | Assembly Democratic Camp Comm | $12,000 | 10/19/2020 |
| 68 | International Association of Fire Fighters | State Senate Democratic Comm | $12,000 | 10/21/2020 |
| 72 | Representative Assembly Campaign Com RACC | Clint Moses for WI 29th | $11,340 | 10/23/2020 |
| 73 | Assembly Democratic Camp Community | Democratic Party of Wisconsin | $11,060 | 10/19/2020 |
| 74 | Democratic Party of Wisconsin | Kristin Lyerly for State Assembly | $10,416 | 10/19/2020 |
| 74 | Kristin Lyerly for State Assembly | Democratic Party of Wisconsin | $10,416 | 10/19/2020 |
| 76 | Barton Burstein | Democratic Party of Wisconsin | $10,000 | 10/20/2020 |
| 76 | Billie Kubly | Committee to Elect a Republican Senate | $10,000 | 10/23/2020 |
| 76 | Bricklayers and Allied Craftworkers Political Acti | Democratic Party of Wisconsin | $10,000 | 10/19/2020 |
| 76 | California Democracy Ventures Fund | Democratic Party of Wisconsin | $10,000 | 10/22/2020 |
| 76 | Democratic Party of Wisconsin | Friends of Katrina Shankland | $10,000 | 10/23/2020 |
| 76 | Friends of Robyn Vining | Assembly Democratic Camp Comm | $10,000 | 10/20/2020 |
| 76 | Friends Of Steve Doyle | Assembly Democratic Camp Comm | $10,000 | 10/21/2020 |
| 76 | Leslie White | Democratic Party of Wisconsin | $10,000 | 10/20/2020 |
| 76 | Maggie Mentel | Assembly Democratic Camp Comm | $10,000 | 10/22/2020 |
| 76 | Milwaukee County Democratic Party | Friends of Jessica Katzenmeyer | $10,000 | 10/23/2020 |
| 76 | National Democratic Redistricting, PAC | Milwaukee County Democratic Party | $10,000 | 10/23/2020 |
| 76 | Selina Lo | Democratic Party of Wisconsin | $10,000 | 10/19/2020 |
| 88 | Friends of Mary | Republican Party of Wisconsin | $9,627 | 10/21/2020 |
| 88 | Republican Party of Wisconsin | Friends of Mary | $9,627 | 10/21/2020 |
| 90 | Friends of Sara Rodriguez For Wisconsin | Democratic Party of Wisconsin | $9,523 | 10/19/2020 |
| 91 | Friends of Eric Wimberger | Republican Party of Wisconsin | $9,216 | 10/19/2020 |
| 91 | Republican Party of Wisconsin | Friends of Eric Wimberger | $9,216 | 10/19/2020 |
| 93 | Republican Party of Wisconsin | Testin for Senate | $9,037 | 10/20/2020 |
| 93 | Testin for Senate | Republican Party of Wisconsin | $9,037 | 10/19/2020 |
| 95 | Howard Erlanger | Democratic Party of Wisconsin | $9,000 | 10/18/2020 |
| 96 | Republican Party of Wisconsin | Kapanke for Senate | $8,933 | 10/20/2020 |
| 97 | Friends of Pat Snyder | Republican Party of Wisconsin | $8,488 | 10/23/2020 |
| 97 | Republican Party of Wisconsin | Feyen for Senate | $8,488 | 10/24/2020 |
| 99 | Friends & Neighbors of Robin Vos | Republican Party of Wisconsin | $8,160 | 10/19/2020 |
| 100 | Friends & Neighbors of Robin Vos | Republican Party of Wisconsin | $7,580 | 10/19/2020 |
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