1. Peter Thiel, Clarium Capital Management - $2.6 million

2. Stephen Oskoui, Smiley Media - $602,000

3. Margaret McMahon, self-employed - $200,000

4. Gunter Marksteiner, WHDT World Television Service - $163,000

5. Scott Banister, self-employed - $50,000

*Top donors for 2012 election cycle; numbers through Nov. 26, 2012.

Source: Center for Responsive Politics, Federal Election Commission