Employer · plans filed under one EIN
Mass General Brigham Incorporated
Somerville, MA · Health care and social assistance
Form 5500 information is as filed by the plan administrator with the Department of Labor and may be amended. Figures reflect the plan year shown, not current balances.
3 retirement plans with 100 or more participants file Form 5500 under Mass General Brigham Incorporated's employer identification number (Somerville, Massachusetts). Their latest filings total 242,569 participant records and $29.0B in net assets.
The largest is Consolidated 403(b) Program of Mass General Brigham and Member Organizations, a 403(b) plan with 136,132 participants. A person can be counted in more than one plan, so the participant total is a count of records rather than of people.
Employer contributions across the plans were $357M and participant contributions $669M in the latest plan years; benefits paid were $1.53B. Schedule C compensation reported to service provider organisations totalled $8.0M.
Combined net assets moved from $83.6M in 2009 to $29.0B in 2024 (up 34560%). Plan mergers and spin-offs show up here as steps in the series.
Plans
| Plan | Kind | Plan year | Participants | Net assets | Per participant | Employer / active | Sch. C compensation |
|---|---|---|---|---|---|---|---|
| Consolidated 403(b) Program of Mass General Brigham and Member Organizations | 403(b) plan | 2024 | 136,132 | $16.7B | $123,011 | $2,129 | $4.3M |
| Consolidated Cash Balance Program of Mass General Brigham and Member Organizations | cash balance pension plan | 2024 | 96,507 | $11.6B | $120,057 | $2,983 | $3.6M |
| Consolidated 401(a) and 401(k) Program of Mass General Brigham and Member Organizations | 401(k) plan | 2024 | 9,930 | $645M | $64,973 | $1,347 | $112K |
| US median, plan year 2024: DC plans $53,102 per participant, $2,175 employer contribution per active participant; DB plans $86,221 and $10,244. | |||||||
Trend by plan year
| Plan year | Plans | Participant records | Net assets | Employer contributions | Participant contributions |
|---|---|---|---|---|---|
| 2024 | 3 | 242,569 | $29.0B | $357M | $669M |
| 2023 | 3 | 233,524 | $25.9B | $260M | $602M |
| 2022 | 3 | 228,886 | $21.7B | $240M | $562M |
| 2021 | 3 | 218,243 | $19.6B | $433M | $515M |
| 2020 | 3 | 208,616 | $23.2B | $173M | $474M |
| 2019 | 3 | 199,248 | $19.1B | $546M | $420M |
| 2018 | 3 | 187,016 | $17.0B | $589M | $381M |
| 2017 | 3 | 170,333 | $15.6B | $275M | $342M |
| 2016 | 3 | 134,884 | $12.4B | $513M | $120M |
| 2015 | 3 | 139,825 | $10.7B | $540M | $284M |
| 2014 | 2 | 102,641 | $6.24B | $135M | $270M |
| 2013 | 2 | 86,493 | $6.02B | $85.1M | $235M |
| 2012 | 1 | 3,510 | $90.0M | $0 | $0 |
| 2011 | 1 | 3,897 | $83.7M | $0 | $0 |
| 2010 | 1 | 4,080 | $85.1M | $0 | $0 |
| 2009 | 1 | 4,078 | $83.6M | $41K | $0 |
History of the plans listed above, in the years each filed the full Form 5500 with 100 or more participants. Plans that have since terminated are not included.
Service providers
| Organisation | Services reported | Plans | Compensation reported |
|---|---|---|---|
| Fidelity Investments | Participant loan processing; Consulting (general) | 2 | $4,434,997 |
| Alight Solutions LLC | Recordkeeping and information management; Participant communication | 1 | $2,620,380 |
| State Street Corporation | Trustee (bank, trust company, or similar financial institution) | 1 | $421,753 |
| Willis Towers Watson LLC | Actuarial | 1 | $376,666 |
| Conduent | Recordkeeping and information management | 1 | $107,939 |
| Morgan Lewis and Bochius LLP | Legal | 1 | $45,521 |
| TIAA-CREF | Participant loan processing | 1 | $11,412 |
Organisations paid $5,000 or more by any of these plans, from Schedule C. Individuals are not shown.
Questions and answers
How many retirement plans does Mass General Brigham Incorporated have?
3 plans with 100 or more participants filed Form 5500 under its employer identification number for the latest plan years: Consolidated 403(b) Program of Mass General Brigham and Member Organizations, Consolidated Cash Balance Program of Mass General Brigham and Member Organizations and Consolidated 401(a) and 401(k) Program of Mass General Brigham and Member Organizations. Smaller plans and plans filed under a subsidiary's number are not grouped here.
How much does Mass General Brigham Incorporated contribute to its plans?
$356,905,632 in employer contributions across these plans in their latest plan years, about $2,473 per active participant record. Form 5500 reports totals and not the match or accrual formula.
Who provides services to these plans?
Schedule C filings name Fidelity Investments, Alight Solutions LLC, State Street Corporation and Willis Towers Watson LLC and others. Only organisations paid $5,000 or more by a plan are listed on Schedule C.
Where does this come from?
Form 5500 annual reports filed with the Department of Labor's EFAST2 system, from the EBSA research files, with filings received through 24 Aug 2026. Figures are as filed and may be amended.
Provenance
Source: U.S. Department of Labor, Employee Benefits Security Administration, Form 5500 research files, public domain, with filings received through 24 Aug 2026. Plans are grouped by the sponsor's employer identification number exactly as filed; a company that files under several EINs appears as several employers. See the methodology and corrections.