Nonprofits most frequently named in corporate contribution disclosures

Rank Nonprofit Number of donor companies
1 U.S. Chamber of Commerce 62
2 Business Roundtable 53
3 National Association of Manufacturers 32
4 Grocery Manufacturers Association 14
4 TechAmerica 14
5 America's Health Insurance Plans 11
5 California Chamber of Commerce 11
5 Financial Services Roundtable 11
5 Retail Industry Leaders Association 11

Source: Center for Public Integrity review of corporate records that self-reported contributions or affiliations with politically active nonprofits and trade groups, most of which covered calendar year 2012.