The Center uses a hierarchical coding system to classify organizations by industry and interest group. At the top level are 13 sectors — ten covering business groups and one each for "labor," "ideological/single-issues," and "other." Below that are about 100 industries, more detailed than the broad sectors.


Industry Total
Pharmaceuticals/Health Products $156,681,957
Electronics Mfg & Equip $80,617,366
Insurance $80,428,145
Oil & Gas $58,299,162
Business Associations $55,546,839
Electric Utilities $55,282,381
Air Transport $54,922,668
Misc Manufacturing & Distributing $54,649,615
Hospitals/Nursing Homes $54,262,159
Telecom Services $53,127,580
Securities & Investment $52,277,794
Health Services/HMOs $51,147,096
Real Estate $49,088,263
Health Professionals $44,841,438
Education $40,350,981
Internet $38,594,964
Civil Servants/Public Officials $38,291,154
Automotive $32,545,496
Commercial Banks $30,899,937
TV/Movies/Music $25,697,818
View all industries

NOTE: Figures on this page are calculations by the Center for Responsive Politics based on data from the Senate Office of Public Records. Data for the most recent year was downloaded on July 23, 2020 and includes spending from January 1 - June 30. Prior years include spending from January through December.

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