| 1 | International Brotherhood of Electrical Workers Washington | $1.8B | $174.8M | $2.6B |
| 2 | United Mine Workers of America 1993 Benefit Plan and Trust Washington | $781.3M | $541.6M | $216.1M |
| 3 | American Foreign Service Protective Association Washington | $690.5M | $687.3M | $183.6M |
| 4 | National Education Association of the United States Washington | $678.2M | $402.8M | $443.0M |
| 5 | Securities Investor Protection Corporation Washington | $625.3M | $625.3M | $5.1B |
| 6 | Pharmaceutical Research and Manufacturers of America Washington | $524.9M | $521.3M | $349.0M |
| 7 | International Brotherhood of Teamsters Washington | $519.9M | $223.8M | $609.3M |
| 8 | NPR Foundation Washington | $404.8M | $23.0M | $403.7M |
| 9 | United Brotherhood of Carpenters & Joiners of America Washington | $401.4M | $124.3M | $815.8M |
| 10 | Service Employees International Union Washington | $371.8M | $280.8M | $405.8M |
| 11 | Laborers-employers Benefit Plan Collection Trust Washington | $348.5M | $348.5M | $2.1M |
| 12 | Communications Workers of America Afl-cio Clc Washington | $347.7M | $144.1M | $610.4M |
| 13 | International Brotherhood of Electrical Workers Washington | $338.9M | $204.4M | $834.4M |
| 14 | National Park Foundation Washington | $323.8M | $275.1M | $560.6M |
| 15 | Population Services International Washington | $321.6M | $306.3M | $257.6M |
| 16 | American Petroleum Institute Washington | $268.0M | $252.3M | $109.9M |
| 17 | American Chemistry Council Washington | $246.4M | $186.1M | $167.4M |
| 18 | American Bankers Association Washington | $244.7M | $175.4M | $903.4M |
| 19 | Washington Gas Light Company Management Veba Tr Washington | $236.3M | $30.1M | $234.5M |
| 20 | American Federation of Teachers Washington | $231.2M | $218.1M | $128.6M |
| 21 | Chamber of Commerce of the United States of America Washington | $226.2M | $225.8M | $147.0M |
| 22 | Patient Access Network Foundation Washington | $225.9M | $203.0M | $471.3M |
| 23 | Biotechnology Innovation Organization Washington | $214.1M | $117.7M | $170.1M |
| 24 | Laborers International Union of North America Washington | $208.8M | $111.0M | $409.2M |
| 25 | Neighborhood Reinvestment Corp. Washington | $205.7M | $205.7M | $75.2M |
| 26 | American Federation of State County & Municipal Employees Washington | $190.3M | $190.3M | $393.5M |
| 27 | International Union of Operating Engineers Washington | $183.3M | $107.4M | $582.8M |
| 28 | National Restaurant Association Washington | $168.5M | $116.5M | $200.6M |
| 29 | Nuclear Energy Institute INC Washington | $161.1M | $59.4M | $99.2M |
| 30 | Ctia-the Wireless Association Washington | $160.4M | $104.3M | $311.1M |
| 31 | American Beverage Association Washington | $160.3M | $103.8M | $130.9M |
| 32 | Community Partnership for the Prevention of Homelessness Washington | $150.9M | $150.9M | $153.4M |
| 33 | National Association of Home Builders of the United States Washington | $145.4M | $90.0M | $155.6M |
| 34 | Board of Trustees of National Iam B Enefit Trust Fund Washington | $144.4M | $131.4M | $91.3M |
| 35 | American Federation of Labor & Congress of Industrial Orgs Washington | $135.9M | $131.2M | $164.1M |
| 36 | United Mine Workers of America 1992 Benefit Fund Washington | $132.7M | $87.8M | $45.0M |
| 37 | Share Our Strength Washington | $131.2M | $79.1M | $62.6M |
| 38 | National Association of Broadcasters Washington | $125.1M | $71.5M | $207.9M |
| 39 | National Womens Law Center Washington | $118.4M | $41.4M | $118.4M |
| 40 | Mortgage Bankers Association of America Washington | $117.1M | $59.7M | $174.1M |
| 41 | American Institute of Architects Washington | $116.6M | $70.1M | $230.3M |
| 42 | Unidosus Washington | $110.5M | $75.9M | $139.6M |
| 43 | Marys Center for Maternal and Child Care INC Washington | $110.4M | $103.5M | $41.0M |
| 44 | Investment Company Institute Washington | $109.3M | $83.2M | $146.4M |
| 45 | International Association Pension Plan Washington | $107.4M | $64.5M | $132.4M |
| 46 | National Association of County and City Health Officials Washington | $101.9M | $101.9M | $35.2M |
| 47 | International Association of Fire Fighters Washington | $96.5M | $84.1M | $55.4M |
| 48 | Plastics Industry Association INC Washington | $91.2M | $58.6M | $39.6M |
| 49 | Ncta-the Internet & Television Association Washington | $90.4M | $67.5M | $104.4M |
| 50 | US Travel Association Washington | $84.8M | $36.5M | $45.9M |