| National Association of Letter Carriers - Nalc HQS (NALC) | 501(c)(5) | Washington, DC | $1.8 billion |
| United Steelworkers USW | 501(c)(5) | Pittsburgh, PA | $554 million |
| Service Employees International Union (SEIU) | 501(c)(5) | Washington, DC | $254 million |
| Teamsters - TCWH (IBT) | 501(c)(5) | Washington, DC | $238 million |
| National Football League Players Association (NFLPA) | 501(c)(5) | Washington, DC | $123 million |
| Unite Here | 501(c)(5) | New York, NY | $92 million |
| National Treasury Employees Union / National Headquarters (NTEU) | 501(c)(5) | Washington, DC | $38 million |
| Ohio Farm Bureau Federation | 501(c)(5) | Columbus, OH | $19 million |
| American Federation of Musicians of the US & Canada (AFM) | 501(c)(5) | New York, NY | $13 million |
| United Food & Commercial Workers Union - Ufcw | 501(c)(5) | Washington, DC | $239 million |
| Amalgamated Transit Union (ATU) | 501(c)(5) | Silver Spring, MD | $53 million |
| IBEW Local Union No. 26 | 501(c)(5) | Lanham, MD | $26 million |
| Pennsylvania State Education Association (PSEA) | 501(c)(6) | Harrisburg, PA | $79 million |
| Ohio Education Association | 501(c)(6) | Columbus, OH | $67 million |
| National Railway Labor Conference (NRLC) | 501(c)(6) | Arlington, VA | $10 million |
| Kentucky Education Association | 501(c)(6) | Frankfort, KY | $9.8 million |
| Center for Contract Compliance | 501(c)(6) | Covina, CA | $9.6 million |
| Realty Advisory Board on Labor Relations (RAB) | 501(c)(6) | New York, NY | $7.1 million |
| Carpenter Contractor Alliance of Metropolitan New York (NYCDCC) | 501(c)(6) | New York, NY | $5.1 million |
| Joint Safety and Training Institute | 501(c)(6) | San Fernando, CA | $4.7 million |
| New York Electrical Contractors Association | 501(c)(6) | New York, NY | $3.4 million |
| Association of Union Constructors (TAUC) | 501(c)(6) | Arlington, VA | $3.0 million |
| Building Trades Employers' Association of Eastern Massachusetts | 501(c)(6) | Braintree, MA | $2.9 million |
| Electrical Contractors Association of City of Chicago (ECA) | 501(c)(6) | Westchester, IL | $2.8 million |
| California Public Employers Labor Relations Association (CALPELRA) | 501(c)(6) | Newark, CA | $2.4 million |
| Industrial Employers and Distributors Association | 501(c)(6) | Emeryville, CA | $2.1 million |
| AFM and SAG-AFTRA INTELLECTUAL PROPERTY Rights DISTRIBUTION FUND | 501(c)(6) | Valley Village, CA | $93 million |
| 1199Seiu League Training and Upgrading Fund | 501(c)(3) | New York, NY | $73 million |
| Writers Guild of America West (WGAW) | 501(c)(5) | Los Angeles, CA | $48 million |
| National Domestic Workers Alliance (NDWA) | 501(c)(3) | New York, NY | $28 million |
| Liuna Chicagoland Laborers' District Council Training and Apprentice Fund | 501(c)(3) | Carol Stream, IL | $23 million |
| Educational and Cultural Trust Fund of the Electrical Industry | 501(c)(5) | Flushing, NY | $22 million |
| United Association Local Union 290 (UA Local 290) | 501(c)(3) | Tualatin, OR | $13 million |
| United Associations Plumbers & Steamfitters Local Union 342 | 501(c)(3) | Concord, CA | $13 million |
| UA Steamfitters Local 602 | 501(c)(3) | Landover, MD | $11 million |
| Laborers-Employers Cooperation and Education Trust (LECET) | 501(c)(5) | Washington, DC | $8.9 million |
| Local 126 IBEW Occupational Safety Health & EducationTrust | 501(c)(3) | Collegeville, PA | $7.8 million |
| National Basketball Players Association (NBPA) | 501(c)(5) | New York, NY | $311 million |
| District Council 37 (DC37) | 501(c)(5) | New York, NY | $292 million |
| Air Line Pilots Association International (ALPA) | 501(c)(5) | Mclean, VA | $246 million |
| California Teachers Association | 501(c)(5) | Burlingame, CA | $220 million |
| United Welfare Fund (USWU) | 501(c)(5) | New Rochelle, NY | $211 million |
| American Federation of Teachers - Parent Organization (AFT) | 501(c)(5) | Washington, DC | $211 million |
| International Brotherhood of Electrical Workers - Headquarters | 501(c)(5) | Washington, DC | $190 million |
| 1199SEIU United Healthcare Workers East | 501(c)(5) | New York, NY | $187 million |
| International Association of Machinists and Aerospace Workers - Grand Lodge (IAM) | 501(c)(5) | Upper Marlboro, MD | $147 million |
| American Federation of State County and Municipal Employees | 501(c)(5) | Washington, DC | $140 million |
| Sag-Aftra (Sag-Aftra) | 501(c)(5) | Los Angeles, CA | $131 million |
| Communications Workers of America AFL-CIO CLC (CWA) | 501(c)(5) | Washington, DC | $128 million |
| American Federation of Labor and Congress of Industrial Organizations (AFL-CIO) | 501(c)(5) | Washington, DC | $118 million |
| Service Employees International Union Local 32BJ | 501(c)(5) | New York, NY | $112 million |
| United Brotherhood of Carpenters and Joiners of America | 501(c)(5) | Washington, DC | $106 million |
| Laborers' International Union of North America (LIUNA) | 501(c)(5) | Washington, DC | $101 million |
| International Union of Operating Engineers | 501(c)(5) | Washington, DC | $88 million |
| International Association of Sheet Metal Air Rail and Transportation Workers (SMART) | 501(c)(5) | Washington, DC | $84 million |
| International Association of Fire Fighters (IAFF) | 501(c)(5) | Washington, DC | $83 million |
| Carp 46 No Ca Counties Conf Board- Ub B of Carp and Join of America | 501(c)(5) | Oakland, CA | $74 million |
| American Federation of Government Employees | 501(c)(5) | Washington, DC | $73 million |
| Operating Engineers Local 3 (OE3) | 501(c)(5) | Concord, CA | $69 million |
| Allied Pilots Association | 501(c)(5) | Fort Worth, TX | $66 million |
| International Association of Bridge Structural Ornamental and Reinforcing Iron Workers (IABSORIW) | 501(c)(5) | Washington, DC | $63 million |
| American Postal Workers Union - AFL-CIO | 501(c)(5) | Washington, DC | $61 million |
| North Atlantic States Regional Council of Carpenters | 501(c)(5) | Boston, MA | $60 million |
| Electrical Industry Labor Management Cooperation Trust | 501(c)(5) | Dorchester, MA | $60 million |
| Washington Education Association | 501(c)(5) | Federal Way, WA | $56 million |
| United Teachers Los Angeles (UTLA) | 501(c)(5) | Los Angeles, CA | $56 million |
| International Union of Bricklayers and Allied Craftworkers - Bac (BAC) | 501(c)(5) | Washington, DC | $55 million |
| New York State Nurses Association (NYSNA) | 501(c)(5) | New York, NY | $54 million |
| International Union of Operating Engineers Local 150 (IUOE Local 150) | 501(c)(5) | Countryside, IL | $52 million |
| Massachusetts Teachers Association | 501(c)(5) | Quincy, MA | $50 million |
| Hotel and Gaming Trades Council AFL-CIO (HTC) | 501(c)(5) | New York, NY | $48 million |
| Directors Guild of America (DGA) | 501(c)(5) | Los Angeles, CA | $45 million |
| International Union of Operating Engineers Local 12 (IUOE Local 12) | 501(c)(5) | Pasadena, CA | $43 million |
| International Alliance of Theatrical Stage Employees (IATSE) | 501(c)(5) | New York, NY | $41 million |
| Transportation Communications Unioniam | 501(c)(5) | Rockville, MD | $40 million |
| American Farm Bureau Federation (AFBF) | 501(c)(5) | Washington, DC | $37 million |
| United Nurses Association of Caunion of Health Care Professionals Nuhhce AFSCME AFL-CIO | 501(c)(5) | San Dimas, CA | $36 million |
| International Longshoremen's Association - National Headquarters (ILA) | 501(c)(5) | North Bergen, NJ | $32 million |
| Transport Workers Union (TWU) | 501(c)(5) | Washington, DC | $31 million |
| National Air Traffic Controllers Association AFL-CIO | 501(c)(5) | Washington, DC | $30 million |
| Actors' Equity Association | 501(c)(5) | New York, NY | $29 million |
| International Union of Operating Engineers Local 302 | 501(c)(5) | Bothell, WA | $25 million |
| International Union of Operating Enginee LCL Union 1515a15b15c15d15g15h AFL-CIO | 501(c)(5) | Long Island City, NY | $25 million |
| Southwest Airlines Pilots Association | 501(c)(5) | Dallas, TX | $25 million |
| National Association of Government Employees / Nage (NAGE) | 501(c)(5) | Quincy, MA | $24 million |
| International Union of Operating Engineers Local 39 (IUOE) | 501(c)(5) | San Francisco, CA | $22 million |
| Council of School Supervisors and Administrators (CSA) | 501(c)(5) | New York, NY | $21 million |
| Construction and General Building Laborers LOCAL 79 | 501(c)(5) | New York, NY | $21 million |
| Office and Professional Employees International Union | 501(c)(5) | New York, NY | $20 million |
| United Service Workers Union (USWU) | 501(c)(5) | New Rochelle, NY | $19 million |
| Great Lakes Region Organizing Committee | 501(c)(5) | Chicago, IL | $18 million |
| International Union of Operating Engineers Local 825 (IUOE825) | 501(c)(5) | Springfield, NJ | $17 million |
| Ironworkers Union Local 7 | 501(c)(5) | South Boston, MA | $17 million |
| Utility Workers Union of America (UWUA) | 501(c)(5) | Washington, DC | $15 million |
| Retail Wholesale & Department Store Union (RWDSU) | 501(c)(5) | New York, NY | $14 million |
| United Mine Workers of America (UMWA) | 501(c)(5) | Triangle, VA | $13 million |
| International Union of Operating Engineers Local 542 | 501(c)(5) | Fort Washington, PA | $13 million |
| Laborers Eastern Region Organizing Fund (LEROF) | 501(c)(5) | East Brunswick, NJ | $13 million |
| Association for Los Angeles Deputy Sheriffs (ALADS) | 501(c)(5) | Monterey Park, CA | $12 million |
| Coast Longshore Division | 501(c)(5) | San Francisco, CA | $11 million |
| Association of Profess Flight Attendants | 501(c)(5) | Euless, TX | $11 million |
| Writers Guild of America East | 501(c)(5) | New York, NY | $11 million |
| United Union of Roofers Waterproofers & Allied Workers | 501(c)(5) | Washington, DC | $11 million |
| International Union of Operating Engineers Local 4 | 501(c)(5) | Medway, MA | $11 million |
| BCTGM International Union (BCTGM) | 501(c)(5) | Kensington, MD | $10 million |
| International Union of Bricklayers and Allied Craftworkers Local 1 New York | 501(c)(5) | Long Island City, NY | $10 million |
| International Association of Bridge Structural and Ornamental Ironworkers Local 433 | 501(c)(5) | City of Industry, CA | $10 million |
| International Union of Operating Engineers Local 68-68a-68b-68c-68d | 501(c)(5) | West Caldwell, NJ | $9.2 million |
| Carpenters-Contractors Cooperation Committee | 501(c)(5) | Los Angeles, CA | $9.2 million |
| New York State Laborers Organizing Fund (NTSLOF) | 501(c)(5) | Bayside, NY | $8.1 million |
| Sheet Metal Workers Local 17 | 501(c)(5) | Dorchester, MA | $7.6 million |
| Seafarers Joint Employment Fund | 501(c)(5) | Camp Springs, MD | $7.4 million |
| Sergents Benevolent Association (SBA) | 501(c)(5) | New York, NY | $7.3 million |
| LIUNA Mid-Atlantic Region | 501(c)(5) | Reston, VA | $7.0 million |
| United Unions | 501(c)(5) | Washington, DC | $6.7 million |
| New Jersey State Laborers-Employers Cooperation and Education Trust | 501(c)(5) | East Brunswick, NJ | $6.6 million |
| Nassau County Police Benevolent Association | 501(c)(5) | Mineola, NY | $6.4 million |
| International Association Bridge Structural & Ornamen Reinforcing Iron Workers Local Union 40 | 501(c)(5) | New York, NY | $6.2 million |
| Brotherhood of Railroad Signalmen | 501(c)(5) | Front Royal, VA | $6.0 million |
| International Association of Bridge Ironworkers Local Union No 11 | 501(c)(5) | Bloomfield, NJ | $5.9 million |
| Ironworkers Union Local 377 | 501(c)(5) | San Francisco, CA | $5.2 million |
| National Farmers Union (NFU) | 501(c)(5) | Washington, DC | $5.2 million |
| National Conference of Firemen & Oilers | 501(c)(5) | Falls Church, VA | $5.2 million |
| Machinists Institute | 501(c)(3) | Seattle, WA | $5.1 million |
| contd - Association | 501(c)(3) | Falls Church, VA | $2.2 million |
| The Independent Drivers Guild | 501(c)(3) | Long Island City, NY | $8.7 million |
| Chicago Journeymen Plumbers Local Union 130 UA | 501(c)(3) | Chicago, IL | $7.7 million |
| American Guild of Musical Artists | 501(c)(5) | New York, NY | $5.9 million |
| UA Local 12 | 501(c)(3) | Boston, MA | $4.0 million |
| Missouri Valley Line Constructors National Electrical Contractors Association in | 501(c)(6) | Kansas City, MO | $339 million |
| Laborers-Employers Cooperation and Education Trust (LECET) | 501(c)(5) | Washington, DC | $316 million |
| New Jersey Education Association - Central Organization (NJEA) | 501(c)(5) | Trenton, NJ | $155 million |
| Electrical Industry Board of Nassau and Suffolk Counties | 501(c)(5) | Hauppauge, NY | $101 million |
| Iowa Farm Bureau Federation | 501(c)(5) | West Des Moines, IA | $65 million |
| Illinois Education Association | 501(c)(5) | Springfield, IL | $62 million |
| International Brotherhood of Boilermakers Iron Ship Builders | 501(c)(5) | Kansas City, MO | $61 million |
| Michigan Education Association | 501(c)(5) | East Lansing, MI | $58 million |
| National Organization of Industrial Trade Unions (NOITU) | 501(c)(9) | Jamaica, NY | $46 million |
| Teamsters Local 710 | 501(c)(9) | Mokena, IL | $45 million |
| Florida Education Association | 501(c)(5) | Tallahassee, FL | $43 million |
| Service Employees International Union | 501(c)(5) | Salem, OR | $35 million |
| Texas Farm Bureau | 501(c)(5) | Waco, TX | $27 million |
| Illinois Farm Business Farm Management Association | 501(c)(5) | Urbana, IL | $17 million |
| ILWU Local 142 | 501(c)(5) | Honolulu, HI | $16 million |
| NC Farm Bureau Federation | 501(c)(5) | Raleigh, NC | $16 million |
| Arkansas Farm Bureau (ArFB) | 501(c)(5) | Little Rock, AR | $16 million |
| Kentucky Farm Bureau Federation | 501(c)(5) | Louisville, KY | $15 million |
| Michigan Farm Bureau | 501(c)(5) | Lansing, MI | $15 million |
| Independent Pilots Association | 501(c)(5) | Louisville, KY | $14 million |
| Local 825 Labor Management Fund (ELEC 825) | 501(c)(5) | Springfield, NJ | $14 million |