| NRECA Group Benefits Trust | 501(c)(9) | Arlington, VA | $725 million |
| NECA-Ibew Welfare Trust Fund | 501(c)(9) | Decatur, IL | $204 million |
| California Small Manufacturing Health & Welfare Trust Fund | 501(c)(9) | Phoenix, AZ | $12 million |
| Contract Services Administration Trust Fund | 501(c)(6) | Burbank, CA | $23 million |
| Container Royalty Central Collection Fund | 501(c)(6) | Lyndhurst, NJ | $5.0 million |
| Law Enforcement Health Benefits (LEHB) | 501(c)(8) | Philadelphia, PA | $135 million |
| KSKJ Life (KSKJL) | 501(c)(8) | Joliet, IL | $99 million |
| Steamfitters' Industry Trust Fund | 501(c)(5) | Long Island City, NY | $68 million |
| Steamfitters Industry Fund Office | 501(c)(5) | Long Island City, NY | $45 million |
| Eder Financial (BBT) | 501(c)(3) | Elgin, IL | $33 million |
| SEIU 775 Benefits Group | 501(c)(3) | Seattle, WA | $33 million |
| Altrua Ministries | 501(c)(3) | Austin, TX | $24 million |
| Laborers Training and Retraining Trust Fund for Northern California | 501(c)(3) | Pleasanton, CA | $24 million |
| Mutual Beneficial Association (MBA) | 501(c)(8) | Berwyn, PA | $20 million |
| Operating Engineers Funds | 501(c)(5) | Pasadena, CA | $19 million |
| The Building Service 32Bj Benefit Funds | 501(c)(3) | New York, NY | $19 million |
| Luso-American Financial A Fraternal Benefit Society | 501(c)(8) | Dublin, CA | $13 million |
| New York City District Council of Carpenters Benefit Funds (NYCDCCBF) | 501(c)(3) | New York, NY | $13 million |
| KJZT Family Life (CFFT - KJZT) | 501(c)(8) | Austin, TX | $12 million |
| PMTA ILA Containerization Fund | 501(c)(5) | Cherry Hill, NJ | $7.0 million |
| Liuna Local 731 Training Fund | 501(c)(3) | Astoria, NY | $6.8 million |
| Multi-Plan Services Agency | 501(c)(5) | Alameda, CA | $6.7 million |
| National Academy of Sciences Retiree Welfare Benefit Plan Trust | 501(c)(3) | Portsmouth, NH | $6.4 million |
| Keep Them Safe Foundation | 501(c)(3) | Brooklyn, NY | $6.3 million |
| Physicians Organization at Childrens Hospital | 501(c)(3) | Boston, MA | $86 million |
| Police Benevolent Association of the CITY of New YORK | 501(c)(5) | New York, NY | $27 million |
| Job Security Fund of the Electrician Industry | 501(c)(5) | Flushing, NY | $23 million |
| Midwest Operating Engineers Fringe Benefit Funds | 501(c)(5) | Countryside, IL | $17 million |
| Community Foundation of Greater Greensboro | 501(c)(3) | Greensboro, NC | $16 million |
| Hudson East River Systems LLC | 501(c)(3) | New York, NY | $13 million |
| Laborers Health & Safety Fund of North America (LHSFNA) | 501(c)(5) | Washington, DC | $9.9 million |
| International Union of Operating Engineers Local 14-14B | 501(c)(5) | Flushing, NY | $5.4 million |
| District Council 37 Education Fund | 501(c)(3) | New York, NY | $7.3 million |
| Former Player Labor-Management Cooperation Committee Trust | 501(c)(5) | Washington, DC | $6.0 million |
| Sheet Metal Benefit Plans Administrative Corporation (SMBPAC) | 501(c)(5) | Manhattan Beach, CA | $5.4 million |
| International Union of Operating Engineers Local 701 | 501(c)(3) | Seattle, WA | $3.1 million |
| Central States Southeast and Southwest Areas Health and Welfare Fund | 501(c)(9) | Chicago, IL | $5.1 billion |
| 1199seiu National Benefit Fund for Health and Human Service Employees | 501(c)(9) | New York, NY | $2.0 billion |
| Building Service 32bj Health Fund | 501(c)(9) | New York, NY | $1.6 billion |
| Unite Here Health | 501(c)(9) | Aurora, IL | $1.1 billion |
| Line Construction Benefit Fund | 501(c)(9) | Lombard, IL | $1.0 billion |
| National Elevator Industry Health Benefit Plan | 501(c)(9) | Newtown Square, PA | $925 million |
| Management-Ila Managed Health Care Trust Fund | 501(c)(9) | New York, NY | $825 million |
| Neca IBEW Family Medical Care Trust Fund | 501(c)(9) | Rockville, MD | $648 million |
| Midwest Operating Engineers Welfare Fund | 501(c)(9) | Countryside, IL | $632 million |
| New York Hotel Trades Council and Hotel Association of Nyc Health Benefits Fund | 501(c)(9) | New York, NY | $447 million |
| United Federation of Teachers Welfare Fund | 501(c)(9) | New York, NY | $439 million |
| Nyc District Council of Carpenters Welfare Fund | 501(c)(9) | New York, NY | $405 million |
| Reta Trust | 501(c)(9) | Walnut Creek, CA | $276 million |
| Electrical Insurance Trustees | 501(c)(9) | Alsip, IL | $275 million |
| Los Angeles Police Relief Association (LAPRA) | 501(c)(9) | Los Angeles, CA | $273 million |
| Northwest Carpenters Health and Security Plan | 501(c)(9) | Seattle, WA | $270 million |
| 1199SEIU Greater New York Benefit Fund | 501(c)(9) | New York, NY | $252 million |
| Chicago and Vicinity Laborers' District Council Health and Welfare Plan | 501(c)(9) | Westchester, IL | $245 million |
| Special Agents Mutual Benefit Association | 501(c)(9) | Rockville, MD | $239 million |
| Mason Tenders' District Council Welfare Fund | 501(c)(9) | New York, NY | $237 million |
| District Council 37 Health and Security Plan Trust | 501(c)(9) | New York, NY | $231 million |
| United Agricultural Benefit Trust | 501(c)(9) | Irvine, CA | $231 million |
| Heavy and General Laborers Local 472 and Local 172 of New Jersey Welfare Fund | 501(c)(9) | Newark, NJ | $218 million |
| Compass Rose Benefits Group | 501(c)(9) | Reston, VA | $217 million |
| Health and Welfare Trust Fund Local 103 IBEW | 501(c)(9) | Boston, MA | $217 million |
| TML Multistate Intergovernmental Employee Benefits | 501(c)(9) | Austin, TX | $207 million |
| Teamsters Union Local 25 Health Services and Insurance Plan | 501(c)(9) | Charlestown, MA | $206 million |
| Local 94 94A 94B Health and Benefit Trust Fund IUOE AFL-CIO | 501(c)(9) | New York, NY | $205 million |
| General Employees Trust Fund | 501(c)(9) | Brisbane, CA | $196 million |
| 1199 SEIU NBF for Home Care Employees | 501(c)(9) | New York, NY | $194 million |
| District Council 33 Health -welfare Fund | 501(c)(9) | Philadelphia, PA | $185 million |
| Massachusetts Institute of Technology Welfare Benefit Plans Trust | 501(c)(3) | Cambridge, MA | $184 million |
| Operating Engineers Local No 825 Welfare Fund | 501(c)(9) | Springfield, NJ | $181 million |
| Directors Guild of America - Producer Health Plan | 501(c)(9) | Los Angeles, CA | $177 million |
| Eastern Atlantic States Carpenters Health Fund | 501(c)(9) | Philadelphia, PA | $175 million |
| Transit Employees Health and Welfare Plan | 501(c)(9) | Forestville, MD | $175 million |
| Massachusetts Laborers' Health and Welfare Fund | 501(c)(9) | Burlington, MA | $170 million |
| IBEW Local 18 Health and Welfare Trust | 501(c)(9) | Los Angeles, CA | $170 million |
| Pipe Fitters Welfare Fund Local 597 | 501(c)(9) | Chicago, IL | $167 million |
| Electrical Welfare Trust Fund | 501(c)(9) | Lanham, MD | $163 million |
| Ufcw National Health and Welfare Fund | 501(c)(9) | Englewood, NJ | $151 million |
| Los Angeles County Fire Fighters Local 1014 Health and Welfare Plan | 501(c)(9) | El Monte, CA | $148 million |
| Excavators Union 731 Welfare | 501(c)(9) | Astoria, NY | $148 million |
| Seiu Local 1 and Participating Employers Health Trust | 501(c)(9) | Chicago, IL | $136 million |
| Armed Forces Benefit Association (AFBA) | 501(c)(9) | Alexandria, VA | $134 million |
| Welfare Trust Fund Local 804 | 501(c)(9) | Long Island City, NY | $132 million |
| Chicago and Vicinity Laborers' District Council Retiree Health and Welfare Plan | 501(c)(9) | Westchester, IL | $130 million |
| Seafarers Health and Benefits Plan | 501(c)(9) | Camp Springs, MD | $129 million |
| California Service Employees Health and Welfare Trust Fund | 501(c)(9) | Brisbane, CA | $124 million |
| Division 1181 Atu - New York Welfare Fund | 501(c)(9) | Valley Stream, NY | $124 million |
| Iron Workers Local 40 361 and 417 Health | 501(c)(9) | New York, NY | $119 million |
| Seiu Healthcare Il Home Care and Child Care Fund | 501(c)(9) | Chicago, IL | $118 million |
| Painting Industry Insurance Fund | 501(c)(9) | New York, NY | $118 million |
| Philadelphia Area Independent School Business Officers Association | 501(c)(9) | Wayne, PA | $116 million |
| National Iam Benefit Trust Fund | 501(c)(9) | Washington, DC | $114 million |
| IUOE Local 15 | 501(c)(9) | Long Island City, NY | $105 million |
| Southern California Drug Benefit Fund | 501(c)(9) | Los Angeles, CA | $104 million |
| Automobile Mechanics' Local No 701 Union and Industry Welfare | 501(c)(9) | Burr Ridge, IL | $101 million |
| Smart-Mta Trust Fund | 501(c)(9) | Irwindale, CA | $100 million |
| Local 464A United Food and Commercial Workers Union Welfare Service Benefit Fund | 501(c)(9) | Little Falls, NJ | $99 million |
| Plumbers Local Union No 1 Welfare Fund | 501(c)(9) | Long Island City, NY | $98 million |
| Fringe Benefit Plan for Service Contract Act Employees of Maximus Serices LLC | 501(c)(9) | Mclean, VA | $95 million |
| Operating Engineers Welfare Fund of Eastern Pa & Delaware Local 542 | 501(c)(9) | Fort Washington, PA | $93 million |
| Steamfitters Local Union 420 | 501(c)(9) | Philadelphia, PA | $90 million |
| United Food and Commercial Workers Union Local 1262 Employers Welfare Fund | 501(c)(9) | Clifton, NJ | $88 million |
| San Francisco Culinary Bartenders & Service Employees Welfare Fund | 501(c)(9) | Seattle, WA | $85 million |
| United Mine Workers of America 1992 Benefit Plan | 501(c)(9) | Washington, DC | $85 million |
| District Council 47 Health and Welfare Fund | 501(c)(9) | Philadelphia, PA | $84 million |
| Local 282 Welfare Trust Fund | 501(c)(9) | New Hyde Park, NY | $84 million |
| IUOE Local 30 Benefits Fund | 501(c)(9) | Whitestone, NY | $80 million |
| Plumbers Welfare Fund Local 1301 UA | 501(c)(9) | Chicago, IL | $79 million |
| Steamfitters Industry Fund | 501(c)(9) | Long Island City, NY | $78 million |
| UFCW Local 1500 Welfare Fund | 501(c)(9) | Westbury, NY | $78 million |
| International Brotherhood of Electrical Workers - 0164 Local Joint Welfare Fund | 501(c)(5) | Roseland, NJ | $77 million |
| IUOE Local 4 Health & Welfare Plan | 501(c)(9) | Medway, MA | $76 million |
| Pavers and Roadbuilders DC Welfare Fund | 501(c)(9) | Whitestone, NY | $73 million |
| Teamsters Local 727 Health and Welfare Fund | 501(c)(9) | Park Ridge, IL | $71 million |
| Suburban Teamsters of Northern Illinois Welfare Fund | 501(c)(9) | West Chicago, IL | $69 million |
| International Union of Operating Engineers Local 399 Health and Welfare Tru | 501(c)(9) | Chicago, IL | $69 million |
| Trustees of the University of Pennsylvania Retiree Medical and Death Benefits Trust | 501(c)(3) | Philadelphia, PA | $68 million |
| Philadelphia Federation of Teachers Health and Welfare Fund | 501(c)(9) | Philadelphia, PA | $66 million |
| Board of Trustees of SMW Lu No 28 Welfare Fund | 501(c)(9) | Mineola, NY | $65 million |
| Central States Joint Board Health and Welfare Trust Fund | 501(c)(9) | Hillside, IL | $61 million |
| Navistar Retiree Health Benefit Trust | 501(c)(9) | Lisle, IL | $58 million |
| Iron Workers Locals 40 and 361 Topping Out Out Fund | 501(c)(9) | New York, NY | $58 million |
| Sheet Metal Workers Local 73 Welfare Fund | 501(c)(9) | Hillside, IL | $58 million |
| Sheet Metal Workers Health Fund of Local Union No 19 | 501(c)(9) | Philadelphia, PA | $57 million |
| SEIU Local 32BJ District 36 Benefit Fund | 501(c)(9) | Philadelphia, PA | $56 million |
| IUPAT District Council 21 | 501(c)(9) | Philadelphia, PA | $54 million |
| Pipefitters Union Local No 537 Health and Welfare Fund | 501(c)(9) | Dorchester, MA | $54 million |
| Retiree Health and Welfare Fund of Patrolmen's Benevolent Association of New York City | 501(c)(9) | New York, NY | $53 million |
| Local 68 Engineers Union Welfare Fund | 501(c)(9) | West Caldwell, NJ | $52 million |
| Local 817 Ibt Welfare Fund | 501(c)(9) | Great Neck, NY | $52 million |
| United Mine Workers of America Combined Benefit Fund | 501(c)(9) | Washington, DC | $51 million |
| Metro-ILA Funds | 501(c)(9) | Rutherford, NJ | $51 million |
| Graham Holdings Company EBAT | 501(c)(9) | Arlington, VA | $51 million |
| Local 812 Health Fund | 501(c)(9) | Great Neck, NY | $50 million |
| Sheet Metal Workers Union Local No 17 Insurance Fund | 501(c)(9) | Dorchester, MA | $50 million |
| Automotive Industries Welfare Fund | 501(c)(9) | Dublin, CA | $48 million |
| Allied Pilots Association Welfare Benefits Plan Master Trust | 501(c)(9) | Fort Worth, TX | $47 million |
| Psc-Cuny Welfare Fund | 501(c)(9) | Brooklyn, NY | $46 million |
| Local 580 Insurance Fund | 501(c)(9) | New York, NY | $45 million |
| Local 338 RWDSU / UFCW | 501(c)(9) | Mineola, NY | $45 million |
| International Brotherhood of TMSTRS 863 Welfare Fund | 501(c)(9) | Mountainside, NJ | $45 million |
| NJBLS Welfare Fund | 501(c)(9) | Iselin, NJ | $45 million |
| Health and Welfare Fund of the pba of the city of new york | 501(c)(9) | New York, NY | $44 million |
| Fox Valley Laborers Health and Welfare Fund | 501(c)(9) | Elgin, IL | $44 million |
| Teamsters Local 705 | 501(c)(9) | Chicago, IL | $43 million |
| Welfare Fund Teamsters Local 237 Ibt Gen Acct | 501(c)(9) | New York, NY | $43 million |
| Airconditioning and Refrigeration Industry Health and Welfare Trust | 501(c)(9) | Orange, CA | $42 million |
| International Union of Operating Engineers Local 138 Welfare Fund | 501(c)(9) | Farmingdale, NY | $42 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 |
| IBEW Electrial Workers General Welfare Fund | 501(c)(9) | Warrenville, IL | $40 million |