Donations can be made to political candidates in various amounts. The FEC regulates these donations, and individual groups, excluding PACs, must disclose donations over $250 per year.
The following table lists the top 100 contributions donated to Brian Mast's campaign in 2020.
| Rank | Date | Amount | Contributor |
|---|---|---|---|
| 1 | 2020-03-04 | $14,400 | Gad Janay |
| 1 | 2020-03-15 | $14,400 | Marlene Janay |
| 3 | 2020-03-15 | $11,800 | Gad Janay |
| 4 | 2020-01-30 | $11,200 | John J. Cafaro |
| 4 | 2020-02-13 | $11,200 | Daniel Loeb |
| 4 | 2020-03-12 | $11,200 | Marjorie B. Buckley |
| 4 | 2020-03-12 | $11,200 | Walter W. Buckley Jr. |
| 8 | 2020-03-06 | $10,170 | Frederick A. Menowitz |
| 9 | 2020-06-19 | $8,400 | Edward Levy Jr. |
| 9 | 2020-06-19 | $8,400 | Linda Dresner |
| 11 | 2020-02-24 | $5,800 | Warren B. Galkin |
| 12 | 2020-02-26 | $5,700 | Steve Kanzer |
| 13 | 2020-01-11 | $5,600 | James Switzer |
| 13 | 2020-01-11 | $5,600 | Mary Ann Switzer |
| 13 | 2020-01-19 | $5,600 | James Crocker |
| 13 | 2020-01-29 | $5,600 | James Remington |
| 13 | 2020-02-03 | $5,600 | Harry Schwartz |
| 13 | 2020-02-17 | $5,600 | Joel Reinstein |
| 13 | 2020-03-19 | $5,600 | Frederick B. Sontag |
| 13 | 2020-03-19 | $5,600 | Susan T. Sontag |
| 13 | 2020-03-24 | $5,600 | Marshall Field |
| 13 | 2020-04-09 | $5,600 | Alfred Hoffman Jr. |
| 13 | 2020-04-09 | $5,600 | Dawn Hoffman |
| 13 | 2020-05-19 | $5,600 | Robert C. McCormack |
| 25 | 2020-02-12 | $5,400 | Sawyer C. Smith |
| 25 | 2020-02-25 | $5,400 | Barbara S. Feingold |
| 25 | 2020-02-25 | $5,400 | Eric I. Feingold |
| 25 | 2020-02-25 | $5,400 | Samantha Feingold |
| 25 | 2020-03-20 | $5,400 | Janis Lynn Smith |
| 30 | 2020-02-25 | $5,398 | Jeffrey P. Feingold |
| 31 | 2020-02-17 | $5,000 | Herbert Shear |
| 31 | 2020-02-17 | $5,000 | Joan Violin |
| 31 | 2020-02-17 | $5,000 | Mark Levy |
| 31 | 2020-02-17 | $5,000 | Sig Zises |
| 31 | 2020-02-21 | $5,000 | Anthony Difrancesco |
| 36 | 2020-02-17 | $4,000 | Gil Schwartzberg |
| 36 | 2020-02-17 | $4,000 | Herbert Wender |
| 36 | 2020-02-17 | $4,000 | Peter Sidel |
| 36 | 2020-03-03 | $4,000 | Richard Wennet |
| 36 | 2020-03-12 | $4,000 | Larry E. Brown |
| 36 | 2020-03-16 | $4,000 | Patsy Jochum |
| 36 | 2020-03-27 | $4,000 | George Brown |
| 43 | 2020-05-29 | $3,450 | Lewis Stahl |
| 44 | 2020-02-29 | $3,414 | Mary M. Ourisman |
| 45 | 2020-03-03 | $3,290 | Janet N. Bentley |
| 46 | 2020-02-17 | $3,000 | Mark Cohen |
| 47 | 2020-06-19 | $2,920 | Pattie Decker |
| 48 | 2020-02-24 | $2,900 | Kenneth L. Rolfe |
| 49 | 2020-05-29 | $2,871 | Helene Fried Stahl |
| 50 | 2020-05-19 | $2,800 | Lloyd B. Schiller |
| 50 | 2020-05-22 | $2,800 | Frederick A. Menowitz |
| 50 | 2020-05-28 | $2,800 | William Wallace |
| 50 | 2020-06-30 | $2,800 | Denise Pieczynski |
| 54 | 2020-01-23 | $2,656 | Marc Goldman |
| 55 | 2020-06-30 | $2,600 | Thomas Peterffy |
| 56 | 2020-02-14 | $2,400 | Robert A. Guerin |
| 56 | 2020-03-23 | $2,400 | Penn L. Siegel |
| 58 | 2020-05-15 | $2,200 | James E. Perrella |
| 59 | 2020-01-14 | $2,000 | Richard Scibelli |
| 59 | 2020-01-21 | $2,000 | Nick Smith |
| 59 | 2020-01-23 | $2,000 | Maredith Raegenia Leonard |
| 59 | 2020-01-23 | $2,000 | Peter Berger |
| 59 | 2020-02-03 | $2,000 | John H. Slavik |
| 59 | 2020-02-09 | $2,000 | Arvind Vakani |
| 59 | 2020-02-09 | $2,000 | Frederick A. Menowitz |
| 59 | 2020-02-12 | $2,000 | Peter H. Coors |
| 59 | 2020-02-13 | $2,000 | Michael Difrancesco |
| 59 | 2020-02-15 | $2,000 | Gene L. Kroner |
| 59 | 2020-02-17 | $2,000 | Barry Berg |
| 59 | 2020-02-17 | $2,000 | Chris Demain |
| 59 | 2020-02-17 | $2,000 | Howard Bromberg |
| 59 | 2020-02-17 | $2,000 | Janet Emerson |
| 59 | 2020-02-17 | $2,000 | John Wolf |
| 59 | 2020-02-17 | $2,000 | Michael Levin |
| 59 | 2020-02-17 | $2,000 | Patricia Lampert |
| 59 | 2020-02-17 | $2,000 | Ruth Naftaly |
| 59 | 2020-02-19 | $2,000 | Stanley Jacobson |
| 59 | 2020-02-20 | $2,000 | James Bacon |
| 59 | 2020-02-21 | $2,000 | Joan G. Hoffman |
| 59 | 2020-02-21 | $2,000 | Marvin O. Schlanger |
| 59 | 2020-02-21 | $2,000 | Peter K. Hoffman |
| 59 | 2020-02-21 | $2,000 | Steven M. Gottlieb |
| 59 | 2020-02-24 | $2,000 | Michael J. Brown Jr. |
| 59 | 2020-02-24 | $2,000 | Sandra K. Allen |
| 59 | 2020-02-25 | $2,000 | Norman Chambers |
| 59 | 2020-02-27 | $2,000 | Mike Gaudino |
| 59 | 2020-03-03 | $2,000 | Arthur M. Moren Jr. |
| 59 | 2020-03-03 | $2,000 | Marilyn Blanchard |
| 59 | 2020-03-06 | $2,000 | Carol A. Henrichs |
| 59 | 2020-03-10 | $2,000 | David Latham |
| 59 | 2020-03-17 | $2,000 | Dennis L. Riese |
| 59 | 2020-03-20 | $2,000 | James E. Dockter |
| 59 | 2020-03-20 | $2,000 | Zachary Berg |
| 59 | 2020-03-23 | $2,000 | Phillip B. Lassiter |
| 59 | 2020-03-31 | $2,000 | Sandra B. Constandine |
| 59 | 2020-03-31 | $2,000 | Sandra K. Allen |
| 59 | 2020-05-12 | $2,000 | Lynda R. Britton |
| 59 | 2020-05-18 | $2,000 | Bill Dobbelaer |
| 59 | 2020-05-29 | $2,000 | Janet M. Seizyk |
| 100 | 2020-02-25 | $1,900 | Melvin L. Duck |
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