Data / Nonprofits / Massachusetts / Boston / Mutual and membership benefit
Mutual and membership benefit nonprofits in Boston, MA: 51 registered with the IRS
51 mutual and membership benefit nonprofits are registered with the IRS in Boston, MA, 5 of them 501(c)(3) charities; the 38 that report revenue took in $212.4 million. The largest by revenue: John Hancock Mutual Life Insurance Company Empl Welfare Trust ($95.4 million), Transit Employees Health and Welfare Fund ($23.2 million), Unitarian Universalist Associationemployee Benefits Trust ($18 million).
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Every organization, largest by revenue first
| Organization | Type | Since | Revenue | Assets | Filing |
|---|
| John Hancock Mutual Life Insurance Company Empl Welfare Trust | 501(c)(9) | 2014 | $95.4 million | $105.6 million | 2024-12 |
| Transit Employees Health and Welfare Fund | 501(c)(9) | 2019 | $23.2 million | $30.7 million | 2024-12 |
| Unitarian Universalist Associationemployee Benefits Trust | 501(c)(9) | 2009 | $18 million | $4.5 million | 2025-06 |
| NP Dr Phillips LLC | 501(c)(25) | 2023 | $10 million | $118.7 million | 2025-12 |
| John Hancock Mutual Life Ins Co Marketing Rep Welfare Trust | 501(c)(9) | 2014 | $7.4 million | $224.4 million | 2024-12 |
| NP Crosby LLC | 501(c)(25) | 2023 | $6.7 million | $79.4 million | 2025-12 |
| Boston Plasterers & Cement Masons & Asphalt Layers Loc 534 HLTH & Welf | 501(c)(9) | 1972 | $6.1 million | $8.8 million | 2026-03 |
| NP 18TH & Chet LLC | 501(c)(25) | 2023 | $6.1 million | $83.1 million | 2025-12 |
| NP Atlanta Infill Industrial LLC | 501(c)(25) | 2018 | $5.9 million | $69.6 million | 2025-12 |
| NP Abbey LLC | 501(c)(25) | 2023 | $5.9 million | $101.8 million | 2025-12 |
| NP Oak Lawn Commons LLC | 501(c)(25) | 2024 | $5.4 million | $76.9 million | 2025-12 |
| NP Six Forks LLC | 501(c)(25) | 2015 | $5 million | $50.1 million | 2025-12 |
| Professional Fire Fighters of Massachusetts Health and Welfare | 501(c)(9) | 2009 | $2.7 million | $205,202 | 2025-06 |
| NP Bangerter Crossing LLC | 501(c)(25) | 2019 | $2.5 million | $25.2 million | 2025-12 |
| Gardens at Gethsemane Inc | 501(c)(13) | 2002 | $1.9 million | $3.6 million | 2025-12 |
| CHMC Anesthesia Foundation Inc Retiree Medical Benefit Trust | 501(c)(9) | 2008 | $1.4 million | $33.9 million | 2025-06 |
| The American City Coalition Inc | 501(c)(3) | 2021 | $1.3 million | $696,135 | 2024-12 |
| Knickerbocker Terminus LLC | 501(c)(25) | 2025 | $1.3 million | $43.5 million | 2025-06 |
| Central Cemetery Association of Randolph | 501(c)(13) | 1964 | $991,551 | $6.8 million | 2025-03 |
| Tufts Medical Center-Employee After-Tax Contribution Trust | 501(c)(9) | 2009 | $789,625 | $6.8 million | 2024-12 |
| New England Venture Capital Association | 501(c)(6) | 2018 | $669,120 | $643,690 | 2025-12 |
| CHMC Otolaryngologic Foundation Inc Voluntary Employees Benefit Plan | 501(c)(9) | 2018 | $643,788 | $14.2 million | 2025-12 |
| Teamsters Local 25 Training Fund Inc | 501(c)(9) | 2016 | $440,614 | $708,613 | 2025-12 |
| Masspace Inc | 501(c)(6) | 2018 | $427,660 | $83,914 | 2025-12 |
| Knights Templar of the United States of America Boston Commande | 501(c)(10) | 2026 | $338,289 | $8.6 million | 2025-08 |
| Saint Fidelis Cemetery Support Foundation | 501(c)(3) | 2003 | $316,580 | $351,416 | 2025-12 |
| Cardiovascular Surgical Foundation Inc Retiree Medical Savings Acct | 501(c)(9) | 2026 | $238,354 | $1.6 million | 2025-09 |
| Wcribma-Veba | 501(c)(9) | 2006 | $209,745 | $8.2 million | 2024-12 |
| Tiffany Club New England | 501(c)(3) | 2014 | $181,289 | $6,808 | 2023-06 |
| Boston Pediatric Neurosurgical Foun Dation Inc Veba Trust | 501(c)(9) | 2026 | $152,631 | $152,744 | 2025-09 |
| Tufts Medical Center Retirement Savings Account Plan - Hospital-Co | 501(c)(9) | 2009 | $142,446 | $1.7 million | 2024-12 |
| Massachusetts Board of Bar Overseers Welfare Trust | 501(c)(9) | 2014 | $132,096 | $3.5 million | 2025-12 |
| Boston Public School Teachers Retirement Fund | 501(c)(11) | 1950 | $124,815 | $1.2 million | 2025-08 |
| Xi Sam-Fenway Alumni Corporation | 501(c)(7) | 2009 | $123,730 | $316,022 | 2024-12 |
| Knights Templar of the United States of America | 501(c)(10) | 1964 | $118,467 | $2.1 million | 2024-08 |
| York Rite Office Inc | 501(c)(10) | 2024 | $95,159 | $12,286 | 2025-08 |
| Propeller Club of Boston | 501(c)(6) | 2019 | $89,623 | $62,205 | 2025-12 |
| St Pauls Royal Arch Chapter | 501(c)(10) | 2026 | $86,282 | $987,053 | 2025-08 |
| American Federation of State County & Municipal Employees | 501(c)(5) | 1957 | $0 | $0 | 2025-12 |
| American Federation of State County & Municipal Employees | 501(c)(5) | 1957 | $0 | $0 | 2025-12 |
| Childrens Orthopedic Surgery Foundation Inc Veba Trust | 501(c)(9) | 2026 | | | |
| Grand Royal Arch Chapter of Massachusetts Inc | 501(c)(8) | 2025 | $0 | $2.8 million | 2025-08 |
| Greater Boston Choral Consortium Inc | 501(c)(3) | 2025 | $0 | $0 | 2025-07 |
| Lambda Alpha International | 501(c)(6) | 1968 | $0 | $0 | 2023-12 |
| MHCH Foundation Trust | 501(c)(3) | 2014 | | $629,879 | 2025-12 |
| Massachusetts Academy of Audiologyinc | 501(c)(6) | 2014 | $0 | $0 | 2024-12 |
| Massachusetts Black Lawyers Association | 501(c)(6) | 2013 | $0 | $231,153 | 2024-12 |
| NP Hawkins Press LLC | 501(c)(25) | 2026 | | | |
| The Henry Price Lodge | 501(c)(10) | 2026 | | | |
| Udt Club | 501(c)(10) | 2023 | $0 | $0 | 2025-08 |
| Water Ridge Realty Corporation | 501(c)(25) | 2017 | $0 | $0 | 2025-06 |
Other causes in Boston, MA
Every nonprofit in Boston, MA · Mutual and membership benefit nonprofits across the state · Nonprofits in every city of the state
Read from the IRS Exempt Organizations Business Master File, updated by the IRS on October 24, 2026 and rebuilt here every morning. Revenue and assets are from each organization's latest filing as the IRS lists it; the IRS record is the official one. Organizations only: no people are named on these pages.