| Financial Industry Regulatory Authority (FINRA) | 501(c)(6) | Washington, DC | $1.2 billion |
| National Football League (NFL) | 501(c)(6) | New York, NY | $619 million |
| Securities Investor Protection Corporation (SIPC) | 501(c)(6) | Washington, DC | $486 million |
| New York Shipping Association (NYSA) | 501(c)(6) | Edison, NJ | $262 million |
| National Association of Realtors (NAR) | 501(c)(6) | Chicago, IL | $223 million |
| National Rural Electric Cooperative Association (NRECA) | 501(c)(6) | Arlington, VA | $178 million |
| United States Chamber of Commerce (USCC) | 501(c)(6) | Washington, DC | $178 million |
| Dairy Management Inc (DMI) | 501(c)(6) | Rosemont, IL | $157 million |
| American Beverage Association (ABA) | 501(c)(6) | Washington, DC | $125 million |
| American Chemistry Council (ACC) | 501(c)(6) | Washington, DC | $121 million |
| Young Presidents Organization (YPO) | 501(c)(6) | Irving, TX | $107 million |
| National Federation of Independent Business (NFIB) | 501(c)(6) | Nashville, TN | $99 million |
| Edison Electric Institute (EEI) | 501(c)(6) | Washington, DC | $96 million |
| International Council of Shopping Centers (ICSC) | 501(c)(6) | New York, NY | $80 million |
| CTIA-The Wireless Association | 501(c)(6) | Washington, DC | $78 million |
| Biotechnology Industry Organization (BIO) | 501(c)(6) | Washington, DC | $76 million |
| National Cable and Telecommunications Association (NCTA) | 501(c)(6) | Washington, DC | $71 million |
| National Association of Broadcasters (NAB) | 501(c)(6) | Washington, DC | $70 million |
| Securities Industry and Financial Markets Association (SIFMA) | 501(c)(6) | New York, NY | $66 million |
| National Association of Home Builder (NAHB) | 501(c)(6) | Washington, DC | $65 million |
| CompTIA | 501(c)(6) | Downers Grove, IL | $65 million |
| Americas Health Insurance Plans (AHIP) | 501(c)(6) | Washington, DC | $62 million |
| Business Software Alliance (BSA) | 501(c)(6) | Washington, DC | $59 million |
| Association of American Railroads (AAR) | 501(c)(6) | Washington, DC | $59 million |
| Motion Picture Association of America (MPAA) | 501(c)(6) | Sherman Oaks, CA | $57 million |
| Nuclear Energy Institute (NEI) | 501(c)(6) | Washington, DC | $54 million |
| National Retail Federation (NRF) | 501(c)(6) | Washington, DC | $54 million |
| National Marine Manufacturers Association (NMMA) | 501(c)(6) | Chicago, IL | $51 million |
| SoundExchange | 501(c)(6) | Washington, DC | $47 million |
| Amt-The Association for Manufacturing Technology (AMT) | 501(c)(6) | Mclean, VA | $47 million |
| National Cooperative Business Association (NCBA) | 501(c)(6) | Washington, DC | $44 million |
| National Business Aviation Association (NBAA) | 501(c)(6) | Washington, DC | $43 million |
| Independent Community Bankers of America (ICBA) | 501(c)(6) | Sauk Centre, MN | $42 million |
| National Association of Manufacturers (NAM) | 501(c)(6) | Washington, DC | $42 million |
| Association of National Advertisers (ANA) | 501(c)(6) | New York, NY | $38 million |
| Entertainment Software Association (ESA) | 501(c)(6) | Washington, DC | $35 million |
| Grocery Manufacturers Association (GMA) | 501(c)(6) | Washington, DC | $35 million |
| Advanced Medical Technology Association (AdvaMed) | 501(c)(6) | Washington, DC | $35 million |
| National Association of Convenience Stores (NACS) | 501(c)(6) | Alexandria, VA | $34 million |
| American Gas Association (AGA) | 501(c)(6) | Washington, DC | $34 million |
| United State Travel Association | 501(c)(6) | Washington, DC | $32 million |
| Alliance of Automobile Manufacturers | 501(c)(6) | Washington, DC | $32 million |
| InfoComm International | 501(c)(6) | Fairfax, VA | $32 million |
| Food Marketing Institute (FMI) | 501(c)(6) | Arlington, VA | $31 million |
| Specialty Food Association | 501(c)(6) | New York, NY | $28 million |
| National Defense Industrial Association (NDIA) | 501(c)(3) | Arlington, VA | $28 million |
| Futures Industry Association (FIA) | 501(c)(6) | Washington, DC | $27 million |
| Consumer Healthcare Products Association (CHPA) | 501(c)(6) | Washington, DC | $27 million |
| Recording Industry Association of America (RIAA) | 501(c)(6) | Washington, DC | $26 million |
| Cotton Council International (CCI) | 501(c)(6) | Washington, DC | $26 million |
| Cruise Lines International Association (CLIA) | 501(c)(6) | Washington, DC | $25 million |
| Council of Better Business Bureaus (CBBB) | 501(c)(6) | Arlington, VA | $25 million |
| American Coatings Association (ACA) | 501(c)(6) | Washington, DC | $24 million |
| International Association of Amusement Parks and Attractions (IAAPA) | 501(c)(6) | Orlando, FL | $23 million |
| National Electrical Manufacturers Association (NEMA) | 501(c)(6) | Arlington, VA | $23 million |
| Vision Council of America (VCA) | 501(c)(6) | Alexandria, VA | $22 million |
| American Public Transit Association (APTA) | 501(c)(6) | Washington, DC | $22 million |
| Financial Services Roundtable (FSR) | 501(c)(6) | Washington, DC | $21 million |
| Associated Builders and Contractors (ABC) | 501(c)(6) | Washington, DC | $19 million |
| Recreation Vehicle Industry Association (RVIA) | 501(c)(6) | Reston, VA | $19 million |
| Associated General Contractors of America (AGC) | 501(c)(6) | Arlington, VA | $18 million |
| Retail Industry Leaders Association (RILA) | 501(c)(6) | Arlington, VA | $18 million |
| American Society of Pension Professionals & Actuaries (ASPPA) | 501(c)(6) | Arlington, VA | $18 million |
| Auto Care Association | 501(c)(6) | Bethesda, MD | $17 million |
| U.S. Wheat Associates (USW) | 501(c)(6) | Arlington, VA | $17 million |
| Mechanical Contractors Association of America (MCAA) | 501(c)(6) | Rockville, MD | $17 million |
| Aerospace Industries Association (AIA) | 501(c)(6) | Arlington, VA | $17 million |
| International Franchise Association (IFA) | 501(c)(6) | Washington, DC | $16 million |
| National Confectioners Association (NCA) | 501(c)(6) | Washington, DC | $16 million |
| Distilled Spirits Council of the United States (DISCUS) | 501(c)(6) | Washington, DC | $16 million |
| National Association of Federal Credit Unions (NAFCU) | 501(c)(6) | Arlington, VA | $16 million |
| Motor and Equipment Manufacturers Association (MEMA) | 501(c)(6) | RTP, NC | $16 million |
| American Council of Engineering Companies (ACEC) | 501(c)(6) | Washington, DC | $14 million |
| Council of Insurance Agents and Brokers | 501(c)(6) | Washington, DC | $14 million |
| Healthcare Distribution Management Association (HDMA) | 501(c)(6) | Arlington, VA | $13 million |
| National Beer Wholesalers Association (NBWA) | 501(c)(6) | Alexandria, VA | $13 million |
| Parenteral Drug Association (PDA) | 501(c)(6) | Bethesda, MD | $13 million |
| American Land Title Association (ALTA) | 501(c)(6) | Washington, DC | $13 million |
| Helicopter Association International (HAI) | 501(c)(6) | Alexandria, VA | $12 million |
| Society of the Plastics Industry (SPI) | 501(c)(6) | Washington, DC | $11 million |
| Prestressed Concrete Institute (PCI) | 501(c)(6) | Chicago, IL | $11 million |
| National Roofing Contractors Association (NRCA) | 501(c)(6) | Rosemont, IL | $11 million |
| Asian American Hotel Owners Association (AAHOA) | 501(c)(6) | Atlanta, GA | $11 million |
| Wine and Spirits Wholesalers of America (WSWA) | 501(c)(6) | Washington, DC | $11 million |
| Software and Information Industry Association (SIIA) | 501(c)(6) | Washington, DC | $11 million |
| Equipment Leasing and Finance Association (ELFA) | 501(c)(6) | Washington, DC | $10 million |
| Association for Unmanned Vehicle Systems International (AUVSI) | 501(c)(6) | Arlington, VA | $10 million |
| Telecommunications Industry Association (TIA) | 501(c)(6) | Arlington, VA | $10 million |
| American Cleaning Institute (ACI) | 501(c)(6) | Washington, DC | $9.7 million |
| Financial Services Institute (FSI) | 501(c)(6) | Washington, DC | $9.5 million |
| Specialty Graphic Imaging Association (SGIA) | 501(c)(6) | Fairfax, VA | $9.4 million |
| National Stone, Sand and Gravel Association (NSSGA) | 501(c)(6) | Alexandria, VA | $9.4 million |
| Manufacturers Alliance for Productivity and Innovation (MAPI) | 501(c)(6) | Arlington, VA | $8.7 million |
| Association of Home Appliance Manufacturers (AHAM) | 501(c)(6) | Washington, DC | $8.7 million |
| National Association for Home Care (NAHC) | 501(c)(6) | Washington, DC | $8.2 million |
| International Sign Association (ISA) | 501(c)(6) | Alexandria, VA | $7.8 million |
| National Glass Association (NGA) | 501(c)(6) | Vienna, VA | $7.6 million |
| PCIA - The Wireless Infrastructure Association | 501(c)(6) | Alexandria, VA | $7.4 million |
| Direct Selling Association (DSA) | 501(c)(6) | Washington, DC | $7.3 million |
| Electronic Transactions Association (ETA) | 501(c)(6) | Washington, DC | $7.1 million |
| Rubber Manufactures Association (RMA) | 501(c)(6) | Washington, DC | $7.1 million |
| Aluminum Association | 501(c)(6) | Arlington, VA | $6.9 million |
| International Foodservice Distributors Association (IFDA) | 501(c)(6) | Mclean, VA | $6.8 million |
| American Frozen Food Institute (AFFI) | 501(c)(6) | MC Lean, VA | $6.7 million |
| American Advertising Federation (AAF) | 501(c)(6) | Washington, DC | $6.5 million |
| National Waste and Recycling Association (NWRA) | 501(c)(6) | Arlington, VA | $6.2 million |
| Consumer Specialty Products Association (CSPA) | 501(c)(6) | Washington, DC | $6.1 million |
| Advanced Energy Economy (AEE) | 501(c)(6) | San Francisco, CA | $6.0 million |
| Archery Trade Association (ATA) | 501(c)(6) | New Ulm, MN | $5.8 million |
| Organic Trade Association (OTA) | 501(c)(6) | Washington, DC | $5.4 million |
| American Gear Manufacturers Association (AGMA) | 501(c)(6) | Alexandria, VA | $4.8 million |
| American Apparel and Footwear Association (AAFA) | 501(c)(6) | Washington, DC | $4.7 million |
| Compressed Gas Association (CGA) | 501(c)(6) | Chantilly, VA | $4.5 million |
| Electronic Retailing Association (ERA) | 501(c)(6) | Mclean, VA | $4.5 million |
| Organization for International Investment (OFII) | 501(c)(6) | Washington, DC | $4.4 million |
| American International Automobile Dealers Association (AIADA) | 501(c)(6) | Alexandria, VA | $4.2 million |
| Society for Marketing Professional Services (SMPS) | 501(c)(6) | Alexandria, VA | $3.8 million |
| Independent Lubricant Manufacturers Association (ILMA) | 501(c)(6) | Alexandria, VA | $3.3 million |
| New England Automated Clearing House (NEACH) | 501(c)(6) | Burlington, MA | $3.2 million |
| California Association of Community Managers Inc (CACM) | 501(c)(6) | Laguna Hills, CA | $3.1 million |
| Associated Builders and Contractors (ABC) | 501(c)(6) | Anaheim, CA | $2.7 million |
| National Association of Professional Insurance Agents (PIA) | 501(c)(6) | Alexandria, VA | $2.0 million |
| National Cannabis Industry Association (NCIA) | 501(c)(6) | Denver, CO | $1.7 million |
| Pharmaceutical Research and Manufacturers of America (PhRMA) | 501(c)(6) | Washington, DC | $270 million |
| Consumer Electronics Association (CEA) | 501(c)(6) | Arlington, VA | $108 million |
| Conference of State Bank Supervisors (CSBS) | 501(c)(3) | Washington, DC | $78 million |
| Packaging Machinery Manufacturers Institute (PMMI) | 501(c)(6) | Reston, VA | $68 million |
| Mortgage Bankers Association (MBA) | 501(c)(6) | Washington, DC | $67 million |
| National Association of Chain Drug Stores Inc (NACDS) | 501(c)(6) | Arlington, VA | $40 million |
| National Apartment Association (NAA) | 501(c)(6) | Arlington, VA | $29 million |
| American Wind Energy Association (AWEA) | 501(c)(6) | Washington, DC | $21 million |
| National Multifamily Housing Council (NMHC) | 501(c)(6) | Washington, DC | $17 million |
| Institute of Scrap Recycling Industries Inc (ISRI) | 501(c)(6) | Washington, DC | $13 million |
| United States Telecom Association (USTelecom) | 501(c)(6) | Washington, DC | $12 million |
| National Association of Theatre Owners (NATO) | 501(c)(6) | Washington, DC | $11 million |
| National Alcohol Beverage Control Association (NABCA) | 501(c)(6) | Alexandria, VA | $10 million |
| American Petroleum Institute (API) | 501(c)(6) | Washington, DC | $229 million |
| American Bankers Association (ABA) | 501(c)(6) | Washington, DC | $104 million |
| National Restaurant Association (NRA) | 501(c)(6) | Washington, DC | $97 million |
| American Trucking Associations (ATA) | 501(c)(6) | Arlington, VA | $42 million |
| National Futures Association (NFA) | 501(c)(6) | Chicago, IL | $79 million |
| Airlines for America (A4A) | 501(c)(6) | Washington, DC | $39 million |
| American Institute of Steel Construction (AISC) | 501(c)(6) | Chicago, IL | $23 million |
| BAI Center (BAI) | 501(c)(6) | Chicago, IL | $21 million |
| Illinois Health and Hospital Association (IHA) | 501(c)(6) | Naperville, IL | $20 million |
| Portland Cement Association | 501(c)(6) | Skokie, IL | $19 million |
| Super Bowl 50 Host Committee | 501(c)(6) | San Francisco, CA | $17 million |
| National Housewares Manufacturers Association (International Housewares Assoc) | 501(c)(6) | Rosemont, IL | $15 million |
| Farm Credit Council | 501(c)(6) | Washington, DC | $14 million |
| CCIM Institute | 501(c)(6) | Chicago, IL | $13 million |