Contributions to Dave Zien
Negative contribution amounts denote returned contributions
| State | Year | Contributor | Office | Result | Amount | 
| Wis. | 2004 | ALLIANT ENERGY | Senate | Not Up For Election | $350 | 
| Wis. | 2004 | JOHN DEERE & CO | Senate | Not Up For Election | $500 | 
| Wis. | 2004 | SABMILLER | Senate | Not Up For Election | $100 | 
| Wis. | 2004 | NATIONAL RIFLE ASSOCIATION | Senate | Not Up For Election | $1,000 | 
| Wis. | 2002 | ALLIANT ENERGY | Senate | Won | $250 | 
| Wis. | 2002 | VERIZON | Senate | Won | $500 | 
| Wis. | 2002 | VERIZON | Senate | Won | $500 | 
| Wis. | 1998 | ALLIANT ENERGY | Senate | Won | $100 | 
| Wis. | 1998 | GTE CORP | Senate | Won | $200 |