| Institute of Electrical and Electronics Engineers (IEEE) | 501(c)(3) | Piscataway, NJ | $547 million |
| New York Shipping Association | 501(c)(6) | Edison, NJ | $287 million |
| National Rural Electric Cooperative Association (NRECA) | 501(c)(6) | Arlington, VA | $194 million |
| United States Chamber of Commerce (USCC) | 501(c)(6) | Washington, DC | $167 million |
| American Chemistry Council (ACC) | 501(c)(6) | Washington, DC | $127 million |
| Public Interest Registry (PIR) | 501(c)(3) | Reston, VA | $93 million |
| American Beverage Association (ABA) | 501(c)(6) | Washington, DC | $90 million |
| Biotechnology Innovation Organization (BIO) | 501(c)(6) | Washington, DC | $87 million |
| The Computing Technology Industry Association | 501(c)(6) | Downers Grove, IL | $81 million |
| International Council of Shopping Centers (ICSC) | 501(c)(6) | New York, NY | $80 million |
| Motion Picture Association of America (MPAA) | 501(c)(6) | Sherman Oaks, CA | $76 million |
| CTIA-The Wireless Association | 501(c)(6) | Washington, DC | $74 million |
| National Association of Home Builders (NAHB) | 501(c)(6) | Washington, DC | $74 million |
| Ncta - The Internet and Television Association (NCTA) | 501(c)(6) | Washington, DC | $65 million |
| National Marine Manufacturers Association (NMMA) | 501(c)(6) | Chicago, IL | $62 million |
| American Gas Association (AGA) | 501(c)(6) | Washington, DC | $61 million |
| America's Health Insurance Plans (AHIP) | 501(c)(6) | Washington, DC | $61 million |
| Bsathe Software Alliance (BSA) | 501(c)(6) | Washington, DC | $58 million |
| Securities Industry and Financial Markets Association (SIFMA) | 501(c)(6) | New York, NY | $57 million |
| National Retail Federation (NRF) | 501(c)(6) | Washington, DC | $56 million |
| American National Standards Institute (ANSI) | 501(c)(3) | New York, NY | $56 million |
| Association of American Railroads (AAR) | 501(c)(6) | Washington, DC | $53 million |
| Association of National Advertisers (ANA) | 501(c)(6) | New York, NY | $51 million |
| National Association of Manufacturers (NAM) | 501(c)(6) | Washington, DC | $51 million |
| Amt-The Association for Manufacturing Technology (AMT) | 501(c)(6) | Mclean, VA | $49 million |
| National Business Aviation Association (NBAA) | 501(c)(6) | Washington, DC | $47 million |
| National Cooperative Business Association (NCBA) | 501(c)(6) | Washington, DC | $42 million |
| Advanced Medical Technology Association (AdvaMed) | 501(c)(6) | Washington, DC | $41 million |
| Entertainment Software Association (ESA) | 501(c)(6) | Washington, DC | $40 million |
| National Association of Convenience Stores (NACS) | 501(c)(6) | Alexandria, VA | $39 million |
| Independent Community Bankers of America (ICBA) | 501(c)(6) | Sauk Centre, MN | $39 million |
| Avixa | 501(c)(6) | Fairfax, VA | $37 million |
| Alliance of Automobile Manufacturers | 501(c)(6) | Washington, DC | $34 million |
| United State Travel Association | 501(c)(6) | Washington, DC | $33 million |
| Recording Industry Association of America (RIAA) | 501(c)(6) | Washington, DC | $30 million |
| Specialty Food Association | 501(c)(6) | New York, NY | $29 million |
| The Foundation Center | 501(c)(3) | New York, NY | $29 million |
| Food Marketing Institute (FMI) | 501(c)(6) | Arlington, VA | $29 million |
| Council of Better Business Bureaus (CBBB) | 501(c)(6) | Arlington, VA | $29 million |
| Futures Industry Association (FIA) | 501(c)(6) | Washington, DC | $28 million |
| National Defense Industrial Association | 501(c)(3) | Alexandria, VA | $27 million |
| International Association of Amusement Parks and Attractions (IAAPA) | 501(c)(6) | Orlando, FL | $26 million |
| Cotton Council International (CCI) | 501(c)(6) | Washington, DC | $25 million |
| Vision Council of America (VCA) | 501(c)(6) | Alexandria, VA | $24 million |
| Consumer Healthcare Products Association (CHPA) | 501(c)(6) | Washington, DC | $24 million |
| Cruise Lines International Association (CLIA) | 501(c)(6) | Washington, DC | $24 million |
| Financial Services Roundtable (FSR) | 501(c)(6) | Washington, DC | $22 million |
| Auto Care Association | 501(c)(6) | Bethesda, MD | $22 million |
| American Public Transit Association (APTA) | 501(c)(6) | Washington, DC | $22 million |
| Aerospace Industries Association (AIA) | 501(c)(6) | Arlington, VA | $22 million |
| National Electrical Manufacturers Association (NEMA) | 501(c)(6) | Rosslyn, VA | $21 million |
| National Confectioners Association (NCA) | 501(c)(6) | Washington, DC | $20 million |
| Associated Builders and Contractors (ABC) | 501(c)(6) | Washington, DC | $20 million |
| Mechanical Contractors Association of America (MCAA) | 501(c)(6) | Rockville, MD | $20 million |
| Retail Industry Leaders Association (RILA) | 501(c)(6) | Washington, DC | $19 million |
| Recreation Vehicle Industry Association (RVIA) | 501(c)(6) | Reston, VA | $19 million |
| Grocery Manufacturers Association (GMA) | 501(c)(6) | Arlington, VA | $19 million |
| American Land Title Association (ALTA) | 501(c)(6) | Washington, DC | $17 million |
| Motor and Equipment Manufacturers Association (MEMA) | 501(c)(6) | Research Triangle Park, NC | $17 million |
| Council of Insurance Agents and Brokers | 501(c)(6) | Washington, DC | $17 million |
| U.S. Wheat Associates (USW) | 501(c)(6) | Arlington, VA | $17 million |
| Healthcare Distribution Alliance (HDMA) | 501(c)(6) | Arlington, VA | $16 million |
| Plastics Industry Association (SPI) | 501(c)(6) | Washington, DC | $16 million |
| American Council of Engineering Companies (ACEC) | 501(c)(6) | Washington, DC | $16 million |
| Association for the Advancement of Medical Instrumentation (AAMI) | 501(c)(6) | Arlington, VA | $15 million |
| The Council (DISCUS) | 501(c)(6) | Washington, DC | $15 million |
| Asian American Hotel Owners Association (AAHOA) | 501(c)(6) | Atlanta, GA | $14 million |
| National Beer Wholesalers Association (NBWA) | 501(c)(6) | Alexandria, VA | $14 million |
| Wine and Spirits Wholesalers of America (WSWA) | 501(c)(6) | Washington, DC | $13 million |
| Precastprestressed Concrete Institute | 501(c)(6) | Chicago, IL | $12 million |
| Helicopter Association International (HAI) | 501(c)(6) | Alexandria, VA | $12 million |
| Specialty Graphic Imaging Association (SGIA) | 501(c)(6) | Fairfax, VA | $12 million |
| Worldwide Erc | 501(c)(6) | Arlington, VA | $11 million |
| Association for Unmanned Vehicle Systems International (AUVSI) | 501(c)(6) | Arlington, VA | $11 million |
| Association for Corporate Growth | 501(c)(6) | Chicago, IL | $11 million |
| National Association for Home Care (NAHC) | 501(c)(6) | Washington, DC | $11 million |
| Telecommunications Industry Association (TIA) | 501(c)(6) | Arlington, VA | $11 million |
| American Coatings Association (ACA) | 501(c)(6) | Washington, DC | $10 million |
| National Glass Association (NGA) | 501(c)(6) | Vienna, VA | $10 million |
| Destinations International (DMAI) | 501(c)(6) | Washington, DC | $10 million |
| Smart Electric Power Alliance | 501(c)(3) | Washington, DC | $10 million |
| Wireless Infrastructure Association | 501(c)(6) | Arlington, VA | $10 million |
| Personal Care Products Council Foundation | 501(c)(3) | Washington, DC | $10 million |
| National Stone, Sand and Gravel Association (NSSGA) | 501(c)(6) | Alexandria, VA | $9.4 million |
| National Roofing Contractors Association | 501(c)(6) | Rosemont, IL | $9.4 million |
| Direct Selling Association (DSA) | 501(c)(6) | Washington, DC | $9.4 million |
| Equipment Leasing and Finance Association (ELFA) | 501(c)(6) | Washington, DC | $9.2 million |
| Arabian Horse Association (AHA) | 501(c)(5) | Aurora, CO | $9.1 million |
| Software and Information Industry Association (SIIA) | 501(c)(6) | Washington, DC | $8.7 million |
| Aluminum Association | 501(c)(6) | Arlington, VA | $8.6 million |
| International Sign Association (ISA) | 501(c)(6) | Alexandria, VA | $8.3 million |
| Association of Home Appliance Manufacturers (AHAM) | 501(c)(6) | Washington, DC | $7.8 million |
| Electronic Transactions Association (ETA) | 501(c)(6) | Washington, DC | $7.7 million |
| International Foodservice Distributors Association (IFDA) | 501(c)(6) | Mclean, VA | $7.4 million |
| National Waste and Recycling Association (NWRA) | 501(c)(6) | Arlington, VA | $6.9 million |
| Us Tire Manufacturers Association (RMA) | 501(c)(6) | Washington, DC | $6.9 million |
| Household and Commercial Products Association (CSPA) | 501(c)(6) | Washington, DC | $6.3 million |
| American Advertising Federation (AAF) | 501(c)(6) | Washington, DC | $5.9 million |
| American Gear Manufacturers Association (AGMA) | 501(c)(6) | Alexandria, VA | $5.4 million |
| Organization for International Investment (OFII) | 501(c)(6) | Washington, DC | $5.3 million |
| American Apparel and Footwear Association (AAFA) | 501(c)(6) | Washington, DC | $5.2 million |
| Organic Trade Association (OTA) | 501(c)(6) | Washington, DC | $5.2 million |
| American International Automobile Dealers Association (AIADA) | 501(c)(6) | Alexandria, VA | $4.6 million |
| Compressed Gas Association | 501(c)(6) | Chantilly, VA | $4.5 million |
| American Frozen Food Institute (AFFI) | 501(c)(6) | Arlington, VA | $4.5 million |
| Independent Lubricant Manufacturers Association (ILMA) | 501(c)(6) | Alexandria, VA | $4.1 million |
| Associated Builders and Contractors of Southern California | 501(c)(6) | Anaheim, CA | $4.1 million |
| National Cannabis Industry Association (NCIA) | 501(c)(6) | Washington, DC | $4.0 million |
| National Association of Professional Insurance Agents (PIA) | 501(c)(6) | Alexandria, VA | $1.8 million |
| Leadingage Pa Foundation | 501(c)(3) | Mechanicsburg, PA | $280,515 |
| Pharmaceutical Research and Manufacturers of America (PhRMA) | 501(c)(6) | Washington, DC | $459 million |
| Ces (CEA) | 501(c)(6) | Arlington, VA | $126 million |
| American Association of State Highway and Transportation Officials (AASHTO) | 501(c)(3) | Washington, DC | $88 million |
| Mortgage Bankers Association (MBA) | 501(c)(6) | Washington, DC | $83 million |
| Packaging Machinery Manufacturers Institute (PMMI) | 501(c)(6) | Reston, VA | $78 million |
| National Association of Chain Drug Stores (NACDS) | 501(c)(6) | Arlington, VA | $41 million |
| National Apartment Association (NAA) | 501(c)(6) | Arlington, VA | $36 million |
| American Wind Energy Association (AWEA) | 501(c)(6) | Washington, DC | $22 million |
| National Multifamily Housing Council (NMHC) | 501(c)(6) | Washington, DC | $18 million |
| Institute of Scrap Recycling Industries (ISRI) | 501(c)(6) | Washington, DC | $15 million |
| United States Telecom Association (USTelecom) | 501(c)(6) | Washington, DC | $13 million |
| National Association of Theatre Owners (NATO) | 501(c)(6) | Washington, DC | $12 million |
| National Rifle Association (NRA) | 501(c)(4) | Fairfax, VA | $352 million |
| National Restaurant Association (NRA) | 501(c)(6) | Washington, DC | $289 million |
| American Petroleum Institute (API) | 501(c)(6) | Washington, DC | $234 million |
| American Bankers Association (ABA) | 501(c)(6) | Washington, DC | $135 million |
| National Association of Counties | 501(c)(4) | Washington, DC | $45 million |
| American Trucking Associations (ATA) | 501(c)(6) | Arlington, VA | $44 million |
| Freedom Partners | 501(c)(6) | Arlington, VA | $127 million |
| Groupe Speciale Mobile Association (GSMA) | 501(c)(6) | United Kingdom, | $124 million |
| National Futures Association (NFA) | 501(c)(6) | Chicago, IL | $115 million |
| National Automobile Dealers Association | 501(c)(6) | Tysons, VA | $98 million |
| Confederation of Indian Industry (CII) | 501(c)(6) | Arlington, VA | $82 million |
| Investment Company Institute (ICI) | 501(c)(6) | Washington, DC | $79 million |
| GS1 Us | 501(c)(6) | Lawrenceville, NJ | $71 million |
| Myrtle Beach Area Chamber of Commerce (MBACC) | 501(c)(6) | Myrtle Beach, SC | $53 million |
| Ohio Harness Horsemen's Association (OHHA) | 501(c)(6) | Grove City, OH | $52 million |
| Specialty Equipment Market Association | 501(c)(6) | Diamond Bar, CA | $50 million |
| Inter-Industry Conference on Auto Collision Repairs (I-CAR) | 501(c)(6) | Hoffman Estates, IL | $49 million |
| International Swaps and Derivatives Association (ISDA) | 501(c)(6) | New York, NY | $49 million |
| Country Music Association | 501(c)(6) | Nashville, TN | $49 million |
| American Council of Life Insurers (ACLI) | 501(c)(6) | Washington, DC | $46 million |
| National Shooting Sports Foundation (NSSF) | 501(c)(6) | Newtown, CT | $46 million |
| California Association of Realtors | 501(c)(6) | Los Angeles, CA | $45 million |
| Diamond Producers Association (DPA) | 501(c)(6) | New York, NY | $45 million |
| Apcia Apci | 501(c)(6) | Chicago, IL | $44 million |
| International Copper Association | 501(c)(6) | Mclean, VA | $44 million |
| American Fuel and Petrochemical Manufacturers (AFPM) | 501(c)(6) | Washington, DC | $43 million |
| Airlines for America (A4A) | 501(c)(6) | Washington, DC | $39 million |
| Florida Realtors | 501(c)(6) | Orlando, FL | $38 million |