| NRECA Group Benefits Trust | 501(c)(9) | Arlington, VA | $725 million |
| NECA-Ibew Welfare Trust Fund | 501(c)(9) | Decatur, IL | $170 million |
| California Small Manufacturing Health & Welfare Trust Fund | 501(c)(9) | Phoenix, AZ | $14 million |
| Health Plan of CareOregon | 501(c)(3) | Portland, OR | $220 million |
| Law Enforcement Health Benefits (LEHB) | 501(c)(8) | Philadelphia, PA | $165 million |
| Film Musicians Secondary Markets Fund (FMSMF) | 501(c)(6) | Encino, CA | $124 million |
| Container Royalty Fund | 501(c)(6) | Jersey City, NJ | $104 million |
| Steamfitters' Industry Trust Fund | 501(c)(5) | Long Island City, NY | $84 million |
| Steamfitters Industry Fund Office | 501(c)(5) | Long Island City, NY | $52 million |
| Polish National Alliance of the US of NA | 501(c)(8) | Chicago, IL | $41 million |
| Luso-American Financial A Fraternal Benefit Society | 501(c)(8) | Dublin, CA | $14 million |
| Liuna Local 731 Training Fund | 501(c)(3) | Astoria, NY | $6.9 million |
| National Academy of Sciences Retiree Welfare Benefit Plan Trust | 501(c)(3) | Portsmouth, NH | $6.8 million |
| Multi-Plan Services Agency | 501(c)(5) | Alameda, CA | $6.1 million |
| WB Community Health (WBCH) | 501(c)(3) | Cranston, RI | $149 million |
| Electrical Industry Labor Management Cooperation Trust | 501(c)(5) | Dorchester, MA | $49 million |
| Keep Them Safe Foundation | 501(c)(3) | Brooklyn, NY | $4.5 million |
| Hampton Roads Shipping Association Ila Container Royalty Fund | 501(c)(6) | Norfolk, VA | $30 million |
| Reformed Benefits Association | 501(c)(3) | Grand Rapids, MI | $15 million |
| District Council 37 Education Fund | 501(c)(3) | New York, NY | $7.5 million |
| Sheet Metal Workers' Local 100 Apprent Trust Fund of the Wash DC Area | 501(c)(3) | Suitland, MD | $2.7 million |
| Central States SE and SW Areas Health and Welfare Fund | 501(c)(9) | Chicago, IL | $4.9 billion |
| 1199seiu National Benefit Fund for Health and Human Service Employees | 501(c)(9) | New York, NY | $2.0 billion |
| National Elevator Industry Health Benefit Plan | 501(c)(9) | Newtown Square, PA | $1.0 billion |
| Line Construction Benefit Fund | 501(c)(9) | Lombard, IL | $1.0 billion |
| Management-Ila Managed Health Care Trust Fund | 501(c)(9) | New York, NY | $773 million |
| Neca IBEW Family Medical Care Trust Fund | 501(c)(9) | Rockville, MD | $708 million |
| Unite Here Health | 501(c)(9) | Aurora, IL | $699 million |
| Accenture United States Benefit Trust | 501(c)(9) | Chicago, IL | $691 million |
| Midwest Operating Engineers Welfare Fund | 501(c)(9) | Countryside, IL | $576 million |
| Exelon Corporation Employees' Benefit Trust | 501(c)(9) | Chicago, IL | $520 million |
| United Federation of Teachers Welfare Fund | 501(c)(9) | New York, NY | $429 million |
| Nyc District Council of Carpenters Welfare Fund | 501(c)(9) | New York, NY | $416 million |
| New York Hotel Trades Council and Hotel Association of Nyc Health Benefits Fund | 501(c)(9) | New York, NY | $314 million |
| Laborers Health and Welfare Trust Fund for Southern California | 501(c)(9) | Covina, CA | $292 million |
| Excavators Union 731 Welfare | 501(c)(9) | Astoria, NY | $265 million |
| Electrical Insurance Trustees | 501(c)(9) | Chicago, IL | $263 million |
| Special Agents Mutual Benefit Association | 501(c)(9) | Rockville, MD | $241 million |
| Compass Rose Benefits Group | 501(c)(9) | Reston, VA | $233 million |
| Chicago and Vicinity Laborers' District Council Health and Welfare Plan | 501(c)(9) | Westchester, IL | $222 million |
| Carpenters Trusts of Western Washington | 501(c)(9) | Seattle, WA | $219 million |
| Mason Tenders' District Council Welfare Fund | 501(c)(9) | New York, NY | $219 million |
| Western Growers | 501(c)(9) | Irvine, CA | $210 million |
| Heavy and General Laborers Local 472 and Local 172 of New Jersey Welfare Fund | 501(c)(9) | Newark, NJ | $206 million |
| Teamsters Union Local 25 Health Services and Insurance Plan | 501(c)(9) | Charlestown, MA | $206 million |
| Directors Guild of America - Producer Health Plan | 501(c)(9) | Los Angeles, CA | $206 million |
| 1199SEIU Greater New York Benefit Fund | 501(c)(9) | New York, NY | $198 million |
| District Council 33 Health -welfare Fund | 501(c)(9) | Philadelphia, PA | $197 million |
| Northeast Carpenters Health Fund | 501(c)(9) | Edison, NJ | $194 million |
| General Employees Trust Fund | 501(c)(9) | Brisbane, CA | $181 million |
| Pipe Fitters Welfare Fund Local 597 | 501(c)(9) | Chicago, IL | $170 million |
| Operating Engineers Local No 825 Welfare Fund | 501(c)(9) | Springfield, NJ | $170 million |
| IBEW Local 18 Health and Welfare Trust | 501(c)(9) | Los Angeles, CA | $167 million |
| Transit Employees Health and Welfare Plan | 501(c)(9) | Forestville, MD | $161 million |
| Armed Forces Benefit Association (AFBA) | 501(c)(9) | Alexandria, VA | $157 million |
| Electrical Welfare Trust Fund | 501(c)(9) | Lanham, MD | $156 million |
| Ufcw National Health and Welfare Fund | 501(c)(9) | Englewood, NJ | $156 million |
| Chicago and Vicinity Laborers' District Council Retiree Health and Welfare Plan | 501(c)(9) | Westchester, IL | $137 million |
| Seafarers Health and Benefits Plan | 501(c)(9) | Camp Springs, MD | $134 million |
| Seiu Local 1 and Participating Employers Health Trust | 501(c)(9) | Chicago, IL | $132 million |
| Welfare Trust Fund Local 804 | 501(c)(9) | Long Island City, NY | $126 million |
| Iron Workers Local 40 361 and 417 Health | 501(c)(9) | New York, NY | $125 million |
| Seiu Healthcare Il Home Care and Child Care Fund | 501(c)(9) | Chicago, IL | $123 million |
| Plumbers Local Union No 1 Welfare Fund | 501(c)(9) | Long Island City, NY | $122 million |
| Division 1181 Atu - New York Welfare Fund | 501(c)(9) | Valley Stream, NY | $118 million |
| Painting Industry Insurance Fund | 501(c)(9) | New York, NY | $117 million |
| Christian Brothers Risk Pooling Trust | 501(c)(3) | Romeoville, IL | $116 million |
| Los Angeles County Fire Fighters Local 1014 Health and Welfare Plan | 501(c)(9) | El Monte, CA | $115 million |
| California Service Employees Health and Welfare Trust Fund | 501(c)(9) | Brisbane, CA | $112 million |
| National Iam Benefit Trust Fund | 501(c)(9) | Washington, DC | $109 million |
| Philadelphia Area Independent School Business Officers Association | 501(c)(9) | Wayne, PA | $109 million |
| Automobile Mechanics' Local No 701 Union and Industry Welfare | 501(c)(9) | Burr Ridge, IL | $107 million |
| Local 282 Welfare Trust Fund | 501(c)(9) | New Hyde Park, NY | $103 million |
| Southern California Drug Benefit Fund | 501(c)(9) | Los Angeles, CA | $103 million |
| Local 464A United Food and Commercial Workers Union Welfare Service Benefit Fund | 501(c)(9) | Little Falls, NJ | $103 million |
| Smart-Mta Trust Fund | 501(c)(9) | Irwindale, CA | $100 million |
| Operating Engineers Welfare Fund of Eastern Pa & Delaware Local 542 | 501(c)(9) | Fort Washington, PA | $100 million |
| IUOE Local 15 | 501(c)(9) | Long Island City, NY | $98 million |
| United Mine Workers of America 1992 Benefit Plan | 501(c)(9) | Washington, DC | $93 million |
| Steamfitters Local Union 420 | 501(c)(9) | Philadelphia, PA | $89 million |
| United Food and Commercial Workers Union Local 1262 Employers Welfare Fund | 501(c)(9) | Clifton, NJ | $87 million |
| UFCW Local 1500 Welfare Fund | 501(c)(9) | Westbury, NY | $80 million |
| Plumbers Welfare Fund Local 1301 UA | 501(c)(9) | Chicago, IL | $79 million |
| International Brotherhood of Electrical Workers - 0164 Local Joint Welfare Fund | 501(c)(5) | Roseland, NJ | $78 million |
| Board of Trustees of SMWIA Lu No 28 Welfare Fund | 501(c)(9) | Mineola, NY | $78 million |
| District Council 47 Health and Welfare Fund | 501(c)(9) | Philadelphia, PA | $78 million |
| Steamfitters Industry Fund | 501(c)(9) | Long Island City, NY | $76 million |
| Suburban Teamsters of Northern Illinois Welfare Fund | 501(c)(9) | West Chicago, IL | $76 million |
| IUOE Local 4 Health & Welfare Plan | 501(c)(9) | Medway, MA | $74 million |
| National Organization of Industrial Trade Unions (NOITU) | 501(c)(9) | Jamaica, NY | $71 million |
| Bellsouth Corporation Rfa Life Veba Trust | 501(c)(9) | Dallas, TX | $70 million |
| Local 580 Insurance Fund | 501(c)(9) | New York, NY | $70 million |
| Bakery and Confectionery Union and Industry International Health Benefits Fund | 501(c)(9) | Kensington, MD | $69 million |
| International Union of Operating Engineers Local 399 Health and Welfare Tru | 501(c)(9) | Chicago, IL | $66 million |
| Central States Joint Board Health and Welfare Trust Fund | 501(c)(9) | Hillside, IL | $65 million |
| United Mine Workers of America Combined Benefit Fund | 501(c)(9) | Washington, DC | $64 million |
| Trustees of the University of Pennsylvania Retiree Medical and Death Benefits Trust | 501(c)(3) | Philadelphia, PA | $64 million |
| Teamsters Local 727 Health and Welfare Fund | 501(c)(9) | Park Ridge, IL | $63 million |
| Philadelphia Fire Fighters Union Local 22 IAF AFL-CIO Health Fund | 501(c)(9) | Philadelphia, PA | $62 million |
| Iron Workers Locals 40 and 361 Topping Out Out Fund | 501(c)(9) | New York, NY | $57 million |
| Philadelphia Federation of Teachers Health and Welfare Fund | 501(c)(9) | Philadelphia, PA | $56 million |
| Graham Holdings Company EBAT | 501(c)(9) | Arlington, VA | $56 million |
| Metro-ILA Funds | 501(c)(9) | Rutherford, NJ | $55 million |
| Automotive Industries Welfare Fund | 501(c)(9) | Dublin, CA | $54 million |
| Retiree Health and Welfare Fund of Patrolmen's Benevolent Association of New York City | 501(c)(9) | New York, NY | $54 million |
| Allied Pilots Association Welfare Benefits Trust | 501(c)(9) | Fort Worth, TX | $54 million |
| Pipefitters Union Local No 537 Health and Welfare Fund | 501(c)(9) | Dorchester, MA | $53 million |
| SEIU Local 32BJ District 36 Benefit Fund | 501(c)(9) | Philadelphia, PA | $53 million |
| Board of Trustees Greater St Louis Construction Laborers Welfare Fund | 501(c)(9) | Saint Louis, MO | $53 million |
| IUPAT District Council 21 | 501(c)(9) | Philadelphia, PA | $53 million |
| Local 68 Engineers Union Welfare Board of Trustees | 501(c)(9) | West Caldwell, NJ | $51 million |
| Teamsters Local 710 | 501(c)(9) | Mokena, IL | $51 million |
| Welfare Fund Teamsters Local 237 Ibt Gen Acct | 501(c)(9) | New York, NY | $51 million |
| New England Health Care Employees Welfare Fund | 501(c)(9) | Hartford, CT | $50 million |
| Sheet Metal Workers Health Fund of Local Union No 19 | 501(c)(9) | Philadelphia, PA | $50 million |
| Psc-Cuny Welfare Fund | 501(c)(9) | New York, NY | $49 million |
| Local 817 Ibt Welfare Fund | 501(c)(9) | Great Neck, NY | $48 million |
| Teamsters Local 705 | 501(c)(9) | Chicago, IL | $47 million |
| Toyota Motor Sales USA | 501(c)(9) | Plano, TX | $47 million |
| Local 812 Health Fund | 501(c)(9) | Great Neck, NY | $46 million |
| International Brotherhood of TMSTRS 863 Welfare Fund | 501(c)(9) | Mountainside, NJ | $45 million |
| Health and Welfare Fund of the pba of the city of new york | 501(c)(9) | New York, NY | $45 million |
| Local 338 RWDSU / UFCW | 501(c)(9) | Mineola, NY | $44 million |
| Ironworkers Local 11 Welfare Fund | 501(c)(9) | Springfield, NJ | $44 million |
| NJBLS Welfare Fund | 501(c)(9) | Jersey City, NJ | $43 million |
| Fox Valley Laborers Health and Welfare Fund | 501(c)(9) | Elgin, IL | $42 million |
| International Union of Operating Engineers Local 138 Welfare Fund | 501(c)(9) | Farmingdale, NY | $41 million |
| The Catholic Charities USA Employee Welfare Benefit Trust | 501(c)(9) | Alexandria, VA | $41 million |
| United Teamster Fund | 501(c)(9) | Brooklyn, NY | $41 million |
| Social Service Employees Union Local 371 Administrative Fund | 501(c)(9) | New York, NY | $40 million |
| Uswu Local 74 Welfare Fund Local 74 Welfare Fund | 501(c)(9) | Long Island City, NY | $40 million |
| Ironworkers Local 580 | 501(c)(9) | New York, NY | $39 million |
| Airconditioning and Refrigeration Industry Health and Welfare Trust | 501(c)(9) | Orange, CA | $39 million |
| Uniformed Firefighters Association of Greater New York | 501(c)(9) | New York, NY | $39 million |
| Craft Division of Local 1049 Health and Welfare Fund | 501(c)(9) | Holtsville, NY | $39 million |
| Chicago Area Ib of T Health and Welfare Trust Fund | 501(c)(9) | Downers Grove, IL | $39 million |
| Stanford University Trust for Post Retirement and Post Employment Benefits | 501(c)(9) | Redwood City, CA | $39 million |
| Sheet Metal Workers Union Local No 17 Insurance Fund | 501(c)(9) | Dorchester, MA | $38 million |
| Ua Local 38 Health and Welfare Trust Fund of SF Marin Sonoma Lake and Mendo Counties | 501(c)(9) | San Francisco, CA | $38 million |
| Laborer's District Council Building and Construction Industry H&W Fund | 501(c)(9) | Philadelphia, PA | $37 million |
| Benefit Fund For Hospital And | 501(c)(9) | Philadelphia, PA | $37 million |
| United Wire Metal and Machine Health and Welfare Fund | 501(c)(9) | Long Island City, NY | $37 million |
| Wisconsin Health Fund (WHF) | 501(c)(9) | Milwaukee, WI | $37 million |
| Ironworkers District Council of New England Health & Welfare Fund | 501(c)(9) | Dorchester, MA | $36 million |
| Teamsters Local 830 Welfare Fund | 501(c)(9) | Philadelphia, PA | $36 million |
| Smart Local 265 Welfare Fund | 501(c)(9) | Carol Stream, IL | $35 million |
| Producers' Health Benefits Plan | 501(c)(9) | West Covina, CA | $35 million |
| IBEW Electrial Workers General Welfare Fund | 501(c)(9) | Warrenville, IL | $35 million |
| Administrative Fund of the Detectives Endowment Association | 501(c)(9) | New York, NY | $34 million |
| Laborers' National Health and Welfare Fund | 501(c)(9) | Washington, DC | $34 million |