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 | Assembly Democratic Camp Community | Joel for Wisconsin | $340,000 | 10/26/2020 |
| 2 | State Senate Democratic Community | Democratic Party of Wisconsin | $267,600 | 10/29/2020 |
| 3 | Republican Party of Wisconsin | Friends of Eric Wimberger | $250,000 | 10/28/2020 |
| 4 | Representative Assembly Campaign Com RACC | Republican Party of Wisconsin | $210,000 | 10/28/2020 |
| 5 | State Senate Democratic Community | Democratic Party of Wisconsin | $151,250 | 10/28/2020 |
| 6 | Republican Party of Wisconsin | Friends of Alberta Darling | $150,000 | 10/28/2020 |
| 7 | Democratic Party of Wisconsin | Friends of Deb Andraca | $140,000 | 10/27/2020 |
| 8 | Democratic Party of Wisconsin | Friends of Sara Rodriguez For Wisconsin | $125,000 | 10/27/2020 |
| 9 | Democratic Party of Wisconsin | Emily Siegrist for Wisconsin | $120,000 | 10/26/2020 |
| 10 | Democratic Party of Wisconsin | Piotrowski for State Senate | $112,428 | 10/28/2020 |
| 11 | Plotkin for Senate | State Senate Democratic Comm | $110,240 | 10/28/2020 |
| 12 | Piotrowski for State Senate | State Senate Democratic Comm | $101,000 | 10/27/2020 |
| 13 | Stacy Herzing | Democratic Party of Wisconsin | $100,000 | 10/28/2020 |
| 14 | Republican Party of Wisconsin | Citizens for Rob Hutton | $99,200 | 10/25/2020 |
| 15 | Representative Assembly Campaign Com RACC | Steffen for Wisconsin | $93,000 | 10/27/2020 |
| 16 | Representative Assembly Campaign Com RACC | Friends & Neighbors of Robin Vos | $90,000 | 10/28/2020 |
| 17 | Amanda WhiteEagle for Wisconsin | Democratic Party of Wisconsin | $76,700 | 10/28/2020 |
| 18 | Representative Assembly Campaign Com RACC | Novak For Assembly | $76,000 | 10/27/2020 |
| 19 | Assembly Democratic Camp Community | Friends of Sara Rodriguez For Wisconsin | $70,000 | 10/27/2020 |
| 20 | Republican Party of Wisconsin | Knodl Assembly 24 | $50,400 | 10/29/2020 |
| 21 | Republican Party of Wisconsin | Knodl Assembly 24 | $50,200 | 10/31/2020 |
| 21 | Republican Party of Wisconsin | Citizens for Rob Hutton | $50,200 | 10/31/2020 |
| 23 | Assembly Democratic Camp Community | Joel for Wisconsin | $50,000 | 10/28/2020 |
| 23 | Dale Leibowitz | Democratic Party of Wisconsin | $50,000 | 10/27/2020 |
| 23 | Democratic Party of Wisconsin | Assembly Democratic Camp Comm | $50,000 | 10/28/2020 |
| 23 | Democratic Party of Wisconsin | Friends of Kathy Hinkfuss | $50,000 | 10/28/2020 |
| 23 | Judith Rubin | Democratic Party of Wisconsin | $50,000 | 10/29/2020 |
| 23 | Lynde B. Uihlein | Democratic Party of Wisconsin | $50,000 | 10/30/2020 |
| 23 | Michael Sacks | Democratic Party of Wisconsin | $50,000 | 10/30/2020 |
| 23 | Republican Party of Wisconsin | Testin for Senate | $50,000 | 10/28/2020 |
| 23 | Robert Rubin | Democratic Party of Wisconsin | $50,000 | 10/29/2020 |
| 32 | Republican Party of Wisconsin | Ken Skowronski for Assembly | $44,696 | 10/25/2020 |
| 33 | Friends of Jacob Malinowski | Democratic Party of Wisconsin | $44,000 | 10/29/2020 |
| 34 | Representative Assembly Campaign Com RACC | Robert Wittke for Assembly | $43,837 | 10/26/2020 |
| 35 | Democratic Party of Wisconsin | DanSchierlForAssembly55 | $42,500 | 10/28/2020 |
| 36 | Representative Assembly Campaign Com RACC | Sanfelippo for Assembly | $41,216 | 10/25/2020 |
| 37 | Democratic Party of Wisconsin | Pfaff for State Senate | $40,000 | 10/27/2020 |
| 37 | Democratic Party of Wisconsin | Winker for Wisconsin | $40,000 | 10/28/2020 |
| 37 | Democratic Party of Wisconsin | Perry for Wisconsin | $40,000 | 10/30/2020 |
| 37 | Friends of Sarah for Assembly | Democratic Party of Wisconsin | $40,000 | 10/28/2020 |
| 37 | Friends Of Steve Doyle | Democratic Party of Wisconsin | $40,000 | 10/29/2020 |
| 42 | Democratic Party of Wisconsin | Piotrowski for State Senate | $38,829 | 10/28/2020 |
| 43 | Committee to Elect a Republican Senate | Friends of Alberta Darling | $35,000 | 10/30/2020 |
| 44 | Democratic Party of Wisconsin | Friends of Jacob Malinowski | $32,000 | 10/28/2020 |
| 45 | Assembly Democratic Camp Community | Emily Siegrist for Wisconsin | $30,000 | 10/26/2020 |
| 45 | Assembly Democratic Camp Community | Joel for Wisconsin | $30,000 | 10/27/2020 |
| 45 | Hulsen Media Services, LLC | Assembly Democratic Camp Comm | $30,000 | 10/30/2020 |
| 48 | Anthony Nicoletti | Democratic Party of Wisconsin | $25,000 | 10/28/2020 |
| 48 | Daniel Lubetzky | Democratic Party of Wisconsin | $25,000 | 10/30/2020 |
| 48 | Friends of Nick Milroy | Assembly Democratic Camp Comm | $25,000 | 10/26/2020 |
| 48 | Friends Of Steve Doyle | Assembly Democratic Camp Comm | $25,000 | 10/26/2020 |
| 48 | Republican Party of Wisconsin | Knodl Assembly 24 | $25,000 | 10/29/2020 |
| 48 | Robert A. Greenheck | Republican Party of Wisconsin | $25,000 | 10/26/2020 |
| 48 | Scott Shenker | Democratic Party of Wisconsin | $25,000 | 10/29/2020 |
| 48 | Stacy Herzing | Democratic Party of Wisconsin | $25,000 | 10/30/2020 |
| 48 | Wiliam Haney | Democratic Party of Wisconsin | $25,000 | 10/30/2020 |
| 57 | Democratic Party of Wisconsin | Kriss Marion for SW Wisconsin | $20,000 | 10/27/2020 |
| 57 | Democratic Party of Wisconsin | Meyers for Assembly | $20,000 | 10/28/2020 |
| 57 | Representative Assembly Campaign Com RACC | Zimmerman for Wisconsin | $20,000 | 10/26/2020 |
| 57 | Representative Assembly Campaign Com RACC | Friends of Kevin Hoyer | $20,000 | 10/30/2020 |
| 61 | Democratic Party of Wisconsin | Emily Siegrist for Wisconsin | $19,595 | 10/27/2020 |
| 62 | Zimmerman for Wisconsin | Republican Party of Wisconsin | $18,808 | 10/28/2020 |
| 63 | Republican Party of Wisconsin | Testin for Senate | $18,225 | 10/28/2020 |
| 64 | Democratic Party of Wisconsin | Emily Siegrist for Wisconsin | $17,753 | 10/29/2020 |
| 65 | Democratic Party of Wisconsin | August for Assembly | $15,500 | 10/28/2020 |
| 66 | Antonia Grilikhes-Lasky | Democratic Party of Wisconsin | $15,000 | 10/30/2020 |
| 66 | Representative Assembly Campaign Com RACC | Macco for Wisconsin | $15,000 | 10/29/2020 |
| 66 | Sebastian Scripps | Democratic Party of Wisconsin | $15,000 | 10/29/2020 |
| 69 | Republican Party of Wisconsin | Friends of Eric Wimberger | $13,167 | 10/28/2020 |
| 70 | Democratic Party of Wisconsin | Friends of Sara Rodriguez For Wisconsin | $12,831 | 10/27/2020 |
| 71 | Democratic Party of Wisconsin | Pfaff for State Senate | $12,823 | 10/26/2020 |
| 72 | Democratic Party of Wisconsin | Friends of Sarah for Assembly | $12,802 | 10/27/2020 |
| 73 | Democratic Party of Wisconsin | Patty for Senate | $12,770 | 10/26/2020 |
| 74 | Democratic Party of Wisconsin | Patty for Senate | $12,630 | 10/26/2020 |
| 75 | Democratic Party of Wisconsin | Amanda WhiteEagle for Wisconsin | $12,416 | 10/27/2020 |
| 76 | Democratic Party of Wisconsin | Joel for Wisconsin | $11,620 | 10/27/2020 |
| 77 | Assembly Democratic Camp Community | Democratic Party of Wisconsin | $11,571 | 10/27/2020 |
| 78 | Democratic Party of Wisconsin | August for Assembly | $11,495 | 10/27/2020 |
| 79 | Democratic Party of Wisconsin | Hansen for Wisconsin | $11,420 | 10/26/2020 |
| 80 | Friends of Mary | Republican Party of Wisconsin | $11,312 | 10/27/2020 |
| 81 | Democratic Party of Wisconsin | Hansen for Wisconsin | $11,250 | 10/26/2020 |
| 82 | Representative Assembly Campaign Com RACC | Steffen for Wisconsin | $10,500 | 10/27/2020 |
| 83 | Anne Bartley | Democratic Party of Wisconsin | $10,000 | 10/28/2020 |
| 83 | Committee to Elect a Republican Senate | Friends of Eric Wimberger | $10,000 | 10/30/2020 |
| 83 | Democratic Party of Wisconsin | Meyers for Assembly | $10,000 | 10/27/2020 |
| 83 | John Noel | Democratic Party of Wisconsin | $10,000 | 10/26/2020 |
| 83 | Representative Assembly Campaign Com RACC | Clint Moses for WI 29th | $10,000 | 10/28/2020 |
| 83 | Representative Assembly Campaign Com RACC | Robert Wittke for Assembly | $10,000 | 10/28/2020 |
| 89 | Republican Party of Wisconsin | Taxpayers for Stafsholt | $9,492 | 10/28/2020 |
| 90 | Republican Party of Wisconsin | Friends of Alberta Darling | $9,470 | 10/29/2020 |
| 91 | Republican Party of Wisconsin | Friends of Eric Wimberger | $9,217 | 10/29/2020 |
| 92 | Wisconsin ACRE - Action Committe For Rural Electri | Assembly Democratic Camp Comm | $9,000 | 10/26/2020 |
| 93 | Democratic Party of Wisconsin | Emily Siegrist for Wisconsin | $8,126 | 10/29/2020 |
| 94 | Republican Party of Wisconsin | Friends of Alberta Darling | $7,941 | 10/30/2020 |
| 95 | Feyen for Senate | Republican Party of Wisconsin | $7,926 | 10/29/2020 |
| 95 | Republican Party of Wisconsin | Feyen for Senate | $7,926 | 10/26/2020 |
| 95 | Republican Party of Wisconsin | Feyen for Senate | $7,926 | 10/30/2020 |
| 98 | Republican Party of Wisconsin | Kapanke for Senate | $7,838 | 10/28/2020 |
| 99 | Republican Party of Wisconsin | Kapanke for Senate | $7,734 | 10/29/2020 |
| 100 | Democratic Party of Wisconsin | Emily Siegrist for Wisconsin | $7,522 | 10/27/2020 |
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