Scorecard for the top 10 outside spenders
| Rank | Group | Wins-Losses | Total spent |
| 1 | Restore Our Future | 0-1 | $143 million |
| 2 | American Crossroads | 3-10 | $105 million |
| 3 | Crossroads GPS | 7-17 | $71 million |
| 4 | Priorities USA Action | 1-0 | $67 million |
| 5 | Majority PAC | 14-3 | $37 million |
| 6 | Americans for Prosperity | 1-2 | $37 million |
| 7 | U.S. Chamber of Commerce | 7-33 | $36 million |
| 8 | House Majority PAC | 40-31 | $31 million |
| 9 | Service Employees International Union | 52-29 | $30 million |
| 10 | American Future Fund | 5-17 | $25 million |
Source/Methodology: Center for Public Integrity analysis of Federal Election Commission data collected by the Center for Responsive Politics and the Sunlight Foundation. Total spending and win-loss records calculated based on all 2011-2012 election cycle activity, including the November general election, primaries and special elections.