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.
Largest 100 Political Contributions (Week Ending March 13)
| Rank | Contributor | Committee | Amount | Date |
|---|---|---|---|---|
| 1 | Reid Hoffman | Democratic Party of Wisconsin | $490,000 | 03/10/2021 |
| 2 | Democratic Party of Wisconsin | Underly for WI | $300,000 | 03/12/2021 |
| 3 | Andrew J. Christenson | Christenson For Judge | $40,000 | 03/08/2021 |
| 4 | Winker for Wisconsin | Democratic Party of Wisconsin | $37,500 | 03/12/2021 |
| 5 | Democratic Party of Wisconsin | State Senate Democratic Comm | $22,500 | 03/10/2021 |
| 6 | Green Advocacy Project | Wisconsin Conservation Voters Independent Expenditure Committee | $20,000 | 03/11/2021 |
| 7 | United Food and Commercial Workers International U | Underly for WI | $18,000 | 03/12/2021 |
| 7 | WI Laborers District Council | Underly for WI | $18,000 | 03/12/2021 |
| 9 | AFT Wisconsin COPE | Underly for WI | $10,000 | 03/12/2021 |
| 9 | Ibew, PAC | IBEW Local 494 PAC | $10,000 | 03/10/2021 |
| 9 | Laura Lavey | Lavey for Judge | $10,000 | 03/10/2021 |
| 9 | Lynde Uihlein | Underly for WI | $10,000 | 03/12/2021 |
| 13 | New Media Firm | A Better Wisconsin Together Political Fund | $9,253 | 03/12/2021 |
| 14 | Republican Party of Wisconsin | Taxpayers for John Jagler | $7,143 | 03/09/2021 |
| 14 | Taxpayers for John Jagler | Republican Party of Wisconsin | $7,143 | 03/10/2021 |
| 14 | Taxpayers for John Jagler | Republican Party of Wisconsin | $7,143 | 03/11/2021 |
| 17 | WEAC Region 6 Political Action Committee | Underly for WI | $6,000 | 03/12/2021 |
| 18 | Republican Party of Wisconsin | Republican Party of Rock County | $5,600 | 03/13/2021 |
| 19 | Laurits Christensen | Underly for WI | $5,000 | 03/12/2021 |
| 19 | Scott M. Corbett | Corbett for Judge Committee | $5,000 | 03/08/2021 |
| 21 | WI Bankers Association PAC | Committee to Elect a Republican Senate | $4,000 | 03/12/2021 |
| 22 | Green Bay, PAC | Underly for WI | $3,500 | 03/12/2021 |
| 23 | Republican Party of Walworth County | Republican Party of Rock County | $3,455 | 03/13/2021 |
| 24 | Mandela for Wisconsin | Democratic Party of Wisconsin | $2,259 | 03/08/2021 |
| 25 | Brian Christenson | Christenson For Judge | $2,000 | 03/08/2021 |
| 25 | Chief Judge Lisa S. Neubauer | Citizens for Judge Jeff Davis | $2,000 | 03/12/2021 |
| 25 | CVS Health, PAC | Committee to Elect a Republican Senate | $2,000 | 03/09/2021 |
| 25 | Deanne White | PHILLIPSON FOR JUDGE | $2,000 | 03/10/2021 |
| 25 | Friends of Alberta Darling | Taxpayers for John Jagler | $2,000 | 03/13/2021 |
| 25 | Mary Christenson | Christenson For Judge | $2,000 | 03/08/2021 |
| 25 | Professional Firefighters of WI PAC | Winker for Wisconsin | $2,000 | 03/12/2021 |
| 25 | Taxpayers for Marklein | Taxpayers for John Jagler | $2,000 | 03/08/2021 |
| 25 | WEAC Region 6 Political Action Committee | Winker for Wisconsin | $2,000 | 03/12/2021 |
| 34 | Christina M. Mayer | Christina Mayer for Judge | $1,500 | 03/11/2021 |
| 35 | Adam Jarchow | Friends of Judge Shelley Grogan | $1,000 | 03/08/2021 |
| 35 | Arabia Vargas | Benitez-Morgan for Judge | $1,000 | 03/11/2021 |
| 35 | Born For Assembly | Citizens for Elijah Behnke | $1,000 | 03/07/2021 |
| 35 | Bryan Steil | Republican Party of Rock County | $1,000 | 03/13/2021 |
| 35 | Edward Thompson | Citizens for Elijah Behnke | $1,000 | 03/07/2021 |
| 35 | Feyen for Senate | Taxpayers for John Jagler | $1,000 | 03/08/2021 |
| 35 | Fonepac | Committee to Elect a Republican Senate | $1,000 | 03/09/2021 |
| 35 | Friends & Neighbors of Robin Vos | Citizens for Elijah Behnke | $1,000 | 03/07/2021 |
| 35 | Friends for Paul Farrow | Taxpayers for John Jagler | $1,000 | 03/08/2021 |
| 35 | Gerald Couri | Friends of Judge Shelley Grogan | $1,000 | 03/11/2021 |
| 35 | John Schwab | Friends of Judge Shelley Grogan | $1,000 | 03/08/2021 |
| 35 | John Stocks | Underly for WI | $1,000 | 03/11/2021 |
| 35 | Leigh Barker | Underly for WI | $1,000 | 03/10/2021 |
| 35 | Marianne Lubar | Underly for WI | $1,000 | 03/08/2021 |
| 35 | Mary Hanaway | Underly for WI | $1,000 | 03/09/2021 |
| 35 | Rebecca, PAC | Citizens for Elijah Behnke | $1,000 | 03/08/2021 |
| 35 | Russell Schieber | Taxpayers for John Jagler | $1,000 | 03/08/2021 |
| 35 | Scott Fitzgerald for Senate | Taxpayers for John Jagler | $1,000 | 03/13/2021 |
| 35 | WEAC Region 5 PAC | Underly for WI | $1,000 | 03/12/2021 |
| 35 | WI Cable, PAC | Taxpayers for John Jagler | $1,000 | 03/11/2021 |
| 55 | WEAC | Wisconsin Education Association Council | $953 | 03/11/2021 |
| 56 | Jefferson County Republican Party | Taxpayers for John Jagler | $750 | 03/08/2021 |
| 56 | Robyn R. Matousek | Citizens for Matousek | $750 | 03/09/2021 |
| 56 | Robyn R. Matousek | Citizens for Matousek | $750 | 03/12/2021 |
| 56 | Vorpagel for Assembly | Citizens for Elijah Behnke | $750 | 03/13/2021 |
| 60 | Rebecca L. Weiss | PHILLIPSON FOR JUDGE | $700 | 03/10/2021 |
| 61 | Eric Farnsworth | Citizens for Judge Jeff Davis | $650 | 03/12/2021 |
| 62 | Robert C. Rosendahl | Christina Mayer for Judge | $626 | 03/10/2021 |
| 63 | Clayton E. Smits | Underly for WI | $600 | 03/10/2021 |
| 64 | Shelly C. Krajacic | Underly for WI | $575 | 03/10/2021 |
| 65 | Eau Claire County Democratic Party | Democratic Party of Wisconsin | $564 | 03/12/2021 |
| 66 | Ryan Hetzel | Citizens for Judge Jeff Davis | $525 | 03/12/2021 |
| 67 | Alexandra E. Agar-Pratt | Underly for WI | $500 | 03/10/2021 |
| 67 | Alliance of Health Insurers PAC | Taxpayers for John Jagler | $500 | 03/13/2021 |
| 67 | Amy Loudenbeck for Assembly | Taxpayers for John Jagler | $500 | 03/11/2021 |
| 67 | Amy Loudenbeck for Assembly | Citizens for Elijah Behnke | $500 | 03/12/2021 |
| 67 | Avram Berk | Citizens for Judge Jeff Davis | $500 | 03/12/2021 |
| 67 | Bennett Hoffman | WHCA-WiCAL PAC | $500 | 03/08/2021 |
| 67 | Camilla Baughman | WHCA-WiCAL PAC | $500 | 03/08/2021 |
| 67 | Charles Domer | Citizens for Judge Jeff Davis | $500 | 03/12/2021 |
| 67 | Charles Ellis | Citizens for Elijah Behnke | $500 | 03/12/2021 |
| 67 | Citizens for August | Citizens for Elijah Behnke | $500 | 03/07/2021 |
| 67 | Daniel Gulling | Friends of Judge Shelley Grogan | $500 | 03/08/2021 |
| 67 | Daniel Ulik | Friends of Judge Shelley Grogan | $500 | 03/11/2021 |
| 67 | Eric R. Swanson | Professional Insurance Agents PAC | $500 | 03/10/2021 |
| 67 | Eric Schumann | Citizens for Elijah Behnke | $500 | 03/07/2021 |
| 67 | Friends of Julian Bradley | Taxpayers for John Jagler | $500 | 03/11/2021 |
| 67 | Friends of Terry Katsma | Citizens for Elijah Behnke | $500 | 03/07/2021 |
| 67 | Greg P. Devine | Underly for WI | $500 | 03/10/2021 |
| 67 | James Allen | Friends of Judge Shelley Grogan | $500 | 03/11/2021 |
| 67 | Jeanne Welch | Taxpayers for John Jagler | $500 | 03/13/2021 |
| 67 | Jeff Tate | Taxpayers for John Jagler | $500 | 03/11/2021 |
| 67 | Jim & Audrey Kusilek | Barron County Republican Party | $500 | 03/08/2021 |
| 67 | Jody Kaslow | Friends of Judge Shelley Grogan | $500 | 03/08/2021 |
| 67 | John Birdsall | Citizens for Judge Jeff Davis | $500 | 03/11/2021 |
| 67 | John D. Horn | Underly for WI | $500 | 03/10/2021 |
| 67 | Julie Underwood | Underly for WI | $500 | 03/11/2021 |
| 67 | Katherine Andersen | Citizens for Judge Jeff Davis | $500 | 03/09/2021 |
| 67 | Linda L. Helf | Underly for WI | $500 | 03/10/2021 |
| 67 | Lisa Mauer | Friends of Judge Shelley Grogan | $500 | 03/11/2021 |
| 67 | Margaret Depetro | Jane for Judge | $500 | 03/08/2021 |
| 67 | Margaret Wood | Underly for WI | $500 | 03/11/2021 |
| 67 | Operating Engineers 139 PAC | Citizens for Elijah Behnke | $500 | 03/12/2021 |
| 67 | Pamela Callahan | Angela Cunningham for Judge | $500 | 03/11/2021 |
| 67 | Patricia Smoody | Underly for WI | $500 | 03/10/2021 |
| 67 | Paul Dwyer | Underly for WI | $500 | 03/11/2021 |
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