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 | League of Conservation Voters | Wisconsin Conservation Voters Independent Expenditure Committee | $250,000 | 07/17/2020 |
| 2 | Green Advocacy Project | Wisconsin Conservation Voters Independent Expenditure Committee | $100,000 | 07/13/2020 |
| 3 | Stanley Bobowski | Bobowski for Senator | $2,000 | 07/17/2020 |
| 4 | Hecke Charlie Van | Pro-Life WI Victory Fund PAC | $965 | 07/15/2020 |
| 5 | Jane Hansen | Citizens for Karl Jaeger | $500 | 07/16/2020 |
| 5 | John H. Jacobs IV | Tauchen for Assembly | $500 | 07/14/2020 |
| 5 | Lawrence Kexel | Friends of Tod Ohnstad | $500 | 07/13/2020 |
| 5 | Mike Coakley | Bobowski for Senator | $500 | 07/16/2020 |
| 9 | David Brafman | Abie for Assembly | $360 | 07/14/2020 |
| 10 | Planned Parenthood Advocates of WI Election Fund | Friends of Mark Spreitzer | $300 | 07/15/2020 |
| 11 | Gail Luedke | WIA PAC | $250 | 07/15/2020 |
| 11 | Julie Brussow | Spiros for Assembly | $250 | 07/17/2020 |
| 13 | Mark Spreitzer | Friends of Mark Spreitzer | $210 | 07/18/2020 |
| 14 | Eric Frank | Abie for Assembly | $200 | 07/16/2020 |
| 14 | Monica Carter | Citizens for Karl Jaeger | $200 | 07/15/2020 |
| 16 | James J. Silbernagel | IFAPAC Wisconsin | $180 | 07/15/2020 |
| 17 | Linda Leder | Republican Party of Portage County | $160 | 07/14/2020 |
| 18 | Paul Hiniker | Citizens for Karl Jaeger | $150 | 07/15/2020 |
| 19 | Daniel P. Krueger | WEC Energy Group PAC (WEC PAC) | $125 | 07/17/2020 |
| 19 | Robert M. Garvin | WEC Energy Group PAC (WEC PAC) | $125 | 07/17/2020 |
| 21 | Brian K. Manthey | WEC Energy Group PAC (WEC PAC) | $113 | 07/17/2020 |
| 22 | Patrick Schillinger | WEC Energy Group PAC (WEC PAC) | $110 | 07/17/2020 |
| 23 | Dennis Rader | Citizens for Karl Jaeger | $100 | 07/15/2020 |
| 23 | Donald Kurklis | Friends of Tod Ohnstad | $100 | 07/13/2020 |
| 23 | Ed Chiera | Friends of Mark Spreitzer | $100 | 07/17/2020 |
| 23 | Helen Hoar | Chequamegon Democratic Party | $100 | 07/17/2020 |
| 23 | Jennifer Friday | Citizens for Karl Jaeger | $100 | 07/12/2020 |
| 23 | Lawrence J. Romuald | Tauchen for Assembly | $100 | 07/14/2020 |
| 23 | Mordechai Eisenbach | Abie for Assembly | $100 | 07/16/2020 |
| 23 | Stephen Olson | Bobowski for Senator | $100 | 07/12/2020 |
| 23 | Vernon Peterson | WEC Energy Group PAC (WEC PAC) | $100 | 07/17/2020 |
| 23 | William Guc | WEC Energy Group PAC (WEC PAC) | $100 | 07/17/2020 |
| 33 | Mullane Elizabeth D. Stueck | WEC Energy Group PAC (WEC PAC) | $83 | 07/17/2020 |
| 34 | Eric Larson | Citizens for Karl Jaeger | $75 | 07/16/2020 |
| 34 | James A. Schubilske | WEC Energy Group PAC (WEC PAC) | $75 | 07/17/2020 |
| 36 | Theodore Eidukas | WEC Energy Group PAC (WEC PAC) | $63 | 07/17/2020 |
| 37 | Adam Ruppert | Chequamegon Democratic Party | $50 | 07/17/2020 |
| 37 | Cheryl Braun | Citizens for Karl Jaeger | $50 | 07/15/2020 |
| 37 | Christopher Larowe | WEC Energy Group PAC (WEC PAC) | $50 | 07/17/2020 |
| 37 | Craig Jamison | Republican Party of Portage County | $50 | 07/14/2020 |
| 37 | Daniel Carney | Friends of Tod Ohnstad | $50 | 07/13/2020 |
| 37 | David Michalski | Bobowski for Senator | $50 | 07/16/2020 |
| 37 | Dennis Flath | Friends of Tod Ohnstad | $50 | 07/13/2020 |
| 37 | Joanne Heindel | Citizens for Karl Jaeger | $50 | 07/16/2020 |
| 37 | John A. Zaganczyk | WEC Energy Group PAC (WEC PAC) | $50 | 07/17/2020 |
| 37 | Molly Mulroy | WEC Energy Group PAC (WEC PAC) | $50 | 07/17/2020 |
| 37 | Paul Spicer | WEC Energy Group PAC (WEC PAC) | $50 | 07/17/2020 |
| 37 | Roman Wojciechowicz | Friends of Tod Ohnstad | $50 | 07/13/2020 |
| 37 | Scott Laskis | Friends of Tod Ohnstad | $50 | 07/13/2020 |
| 50 | William Mastoris | WEC Energy Group PAC (WEC PAC) | $45 | 07/17/2020 |
| 51 | Joel M. Haubrich | WEC Energy Group PAC (WEC PAC) | $42 | 07/17/2020 |
| 51 | Tom Metcalfe | WEC Energy Group PAC (WEC PAC) | $42 | 07/17/2020 |
| 53 | Brandon Masbruch | IFAPAC Wisconsin | $40 | 07/15/2020 |
| 53 | Robert E. Heiderman | IFAPAC Wisconsin | $40 | 07/15/2020 |
| 53 | Ronald R. Schneller | IFAPAC Wisconsin | $40 | 07/15/2020 |
| 53 | Rudi Feller | IFAPAC Wisconsin | $40 | 07/15/2020 |
| 57 | Avraham Schwartz | Abie for Assembly | $36 | 07/15/2020 |
| 57 | David T. Megna | WEC Energy Group PAC (WEC PAC) | $36 | 07/17/2020 |
| 59 | Zierer Jennifer B. Bognar | WEC Energy Group PAC (WEC PAC) | $32 | 07/17/2020 |
| 60 | James Anton | Friends of Mark Spreitzer | $30 | 07/16/2020 |
| 61 | David L. Hughes | WEC Energy Group PAC (WEC PAC) | $27 | 07/17/2020 |
| 62 | Arno Morton | Republican Party of Portage County | $25 | 07/14/2020 |
| 62 | Duane Fameree | WEC Energy Group PAC (WEC PAC) | $25 | 07/17/2020 |
| 62 | John Cuchosz | Republican Party of Portage County | $25 | 07/14/2020 |
| 62 | Karl Jaeger | Citizens for Karl Jaeger | $25 | 07/16/2020 |
| 62 | Mary Eileen Ameigh | Republican Party of Portage County | $25 | 07/14/2020 |
| 62 | Robert Pisciotti | Friends of Tod Ohnstad | $25 | 07/13/2020 |
| 62 | Terry Spice | Citizens for Karl Jaeger | $25 | 07/12/2020 |
| 62 | Walter Rickert | Citizens for Karl Jaeger | $25 | 07/15/2020 |
| 70 | Alvin R. Ciepluch | WEC Energy Group PAC (WEC PAC) | $23 | 07/17/2020 |
| 71 | Leonard Rentmeester | WEC Energy Group PAC (WEC PAC) | $21 | 07/17/2020 |
| 71 | Erica-Nicole Harris | WEC Energy Group PAC (WEC PAC) | $21 | 07/17/2020 |
| 71 | Suzanne M. Clausing | WEC Energy Group PAC (WEC PAC) | $21 | 07/17/2020 |
| 74 | Phyllis Koleske | WEC Energy Group PAC (WEC PAC) | $20 | 07/17/2020 |
| 74 | Jean Bohaczek | Citizens for Karl Jaeger | $20 | 07/12/2020 |
| 74 | Otto Marquardt | WEC Energy Group PAC (WEC PAC) | $20 | 07/17/2020 |
| 74 | Susan Lewis | Citizens for Karl Jaeger | $20 | 07/15/2020 |
| 74 | Terrance Warthen | Friends of Tod Ohnstad | $20 | 07/13/2020 |
| 79 | Shabsi Travitsky | Abie for Assembly | $18 | 07/14/2020 |
| 80 | August P. Richter IV | IFAPAC Wisconsin | $17 | 07/15/2020 |
| 80 | Larry D. Goebel | IFAPAC Wisconsin | $17 | 07/15/2020 |
| 82 | Stephen C. Karolek | WEC Energy Group PAC (WEC PAC) | $15 | 07/17/2020 |
| 82 | Timothy B. Lang | WEC Energy Group PAC (WEC PAC) | $15 | 07/17/2020 |
| 84 | Roger C. Krause | IFAPAC Wisconsin | $14 | 07/15/2020 |
| 84 | Todd Duffield | WEC Energy Group PAC (WEC PAC) | $14 | 07/17/2020 |
| 86 | Clarice M. Zellmer | WEC Energy Group PAC (WEC PAC) | $13 | 07/17/2020 |
| 86 | Jennifer M. Buchanan | WEC Energy Group PAC (WEC PAC) | $13 | 07/17/2020 |
| 86 | Joseph K. Fletcher | WEC Energy Group PAC (WEC PAC) | $13 | 07/17/2020 |
| 86 | Laurence M. Toro | WEC Energy Group PAC (WEC PAC) | $13 | 07/17/2020 |
| 86 | Thomas E. Hawley | WEC Energy Group PAC (WEC PAC) | $13 | 07/17/2020 |
| 91 | Mark S. Farnan | IFAPAC Wisconsin | $12 | 07/15/2020 |
| 91 | Richard A. Balch | IFAPAC Wisconsin | $12 | 07/15/2020 |
| 91 | Timothy Dwyer | IFAPAC Wisconsin | $12 | 07/15/2020 |
| 94 | Hallie M. Sebena | WEC Energy Group PAC (WEC PAC) | $11 | 07/17/2020 |
| 95 | Andrew J. Bird | IFAPAC Wisconsin | $10 | 07/15/2020 |
| 95 | Chris R. Henderson | IFAPAC Wisconsin | $10 | 07/15/2020 |
| 95 | Clement Stencil | Republican Party of Portage County | $10 | 07/14/2020 |
| 95 | George Wiesner | WEC Energy Group PAC (WEC PAC) | $10 | 07/17/2020 |
| 95 | Gregory J. Retzlaff | WEC Energy Group PAC (WEC PAC) | $10 | 07/17/2020 |
| 95 | Jody Arendt | WEC Energy Group PAC (WEC PAC) | $10 | 07/17/2020 |
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