401(k) · DOL Form 5500 · 2024

Mass General Brigham Incorporated 401(k) Plan

Data updated 2026-08-25

$645M
Total assets Above avg plan size
5,146
Participants Above avg headcount
98th
Percentile by assets National rank
$125,379
Avg per participant Near avg balance/head
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Official DOL plan name: Consolidated 401(a) and 401(k) Program of Mass General Brigham and Member Organizations · Sponsored by Mass General Brigham Incorporated · Massachusetts · Healthcare & Social Assistance

$645M in assets, 5,146 participants

Mass General Brigham Incorporated's Consolidated 401(a) and 401(k) Program of Mass General Brigham and Member Organizations reported $645M in total assets and 5,146 participants in its 2024 DOL Form 5500 filing, ranking in the 98th percentile by assets among filed plans. Figures are as reported by the plan sponsor to the Department of Labor, not audited or endorsed by PlainRetire.

  • #16,536 in Healthcare & Social Assistance (16,916 peers)

Coverage in Massachusetts

Consolidated 401(a) and 401(k) Program of Mass General Brigham and Member Organizations covers 5,146 participants in Massachusetts, 7.8x the typical Massachusetts plan (state average ~659 per filing). Assets: $645M.

#16,536
in Healthcare & Social Assistance (16,916 peers)
+2.6%
assets growth YoY
6.5×
vs typical plan assets (national mean)

Consolidated 401(a) and 401(k) Program of Mass General Brigham and Member Organizations's outsized position by total assets

Consolidated 401(a) and 401(k) Program of Mass General Brigham and Member Organizations vs every filed plan by assets

End-of-year total assets · plan year 2024 · DOL Form 5500

$645,200,306 Top 2% higher than 98% of 123,620 filed plans

This plan $0 $2,050,000,000 every filed plan with reported assets, bucketed by value

Dashed line + filled bar = this entry, among filed plans.

Source U.S. Department of Labor Form 5500 filings (EBSA) · plan year 2024

Consolidated 401(a) and 401(k) Program of Mass General Brigham and Member Organizations's large-plan peer group by participant headcount

Plan-year 2024 Form 5500 filings with a reported participant count, partitioned by headcount band, not by assets. Consolidated 401(a) and 401(k) Program of Mass General Brigham and Member Organizations lands in the large band (5,146 participants).

What changed between DOL Form 5500 filings

plan year 2023 → plan year 2024

  • Consolidated 401(a) and 401(k) Program of Mass General Brigham and Member Organizations reported net income fell from $85M in the plan year 2023 filing to $16M in the plan year 2024 filing.
  • Consolidated 401(a) and 401(k) Program of Mass General Brigham and Member Organizations reported participants fell from 5,766 in the plan year 2023 filing to 5,146 in the plan year 2024 filing.
  • Consolidated 401(a) and 401(k) Program of Mass General Brigham and Member Organizations end-of-year assets rose from $629M in the plan year 2023 filing to $645M in the plan year 2024 filing.

See the national 2023→2024 release diff →

EBSA filing schedule strip

Filing strip 043230035 · Mass General Brigham Incorporated PY 2024 · 401(k)

Consolidated 401(a) and 401(k) Program of Mass General Brigham and Member Organizations · $645M · 5,146 · 98th

  • PART $645M
  • PART 5,146
  • PART 98th
  • PART 401(k)
  • PART near Hensel Phelps Salary Retirement Plan
  • PART ind #16536

Stamps derive from this plan's Form 5500 line items (assets, participants, type, EIN, cohort placement) - not a quality rating of the sponsor. Read with Healthcare & Social Assistance retirement plans → · Plans in Massachusetts →

Consolidated 401(a) and 401(k) Program of Mass General Brigham and Member Organizations in the asset neighbourhood

Hensel Phelps Salary Retirement PlanHensel Phelps Salary Retirem…$646MConsolidated 401(a) and 401(k) Program of Mass General Brigham and Member OrganizationsConsolidated 401(a) and 401(…$645MTpg Global, LLC 401(k) Profit Sharing PlanTpg Global, LLC 401(k) Profi…$645MV2x 401(k) Retirement Plan$644MNaes Corporation Retirement & 401(k) PlanNaes Corporation Retirement …$644M
End-of-year total assets ($M) among Consolidated 401(a) and 401(k) Program of Mass General Brigham and Member Organizations and nearest nationwide 401(k) peers. Source: DOL Form 5500 plan year 2024.

Massachusetts filing particulars

Total Assets (Beginning of Year)$629M
Net Assets (End of Year)$645M
Net Income$16M
Employer EIN043230035
Plan Effective Date1996-01-01
Filing StatusFILING RECEIVED

Sponsor Plan History (Mass General Brigham Incorporated)

Sponsor-wide plan assets over time

All Mass General Brigham Incorporated plans reported in each filing year

Latest sponsor-wide plan assets
$29.0B 33.49288324467905% vs 2022
2024 filing year
$20B$25B$30B 202220232024 $21.7B $29B ▲ +33.5%
Year Plans Participants Total Assets
2022 3 136,155 $21.7B
2023 3 138,723 $25.9B
2024 3 142,326 $29.0B

Nearby 401(k) Plans in Massachusetts

Peer 401(k) plans, same state, same plan type, ranked by total assets.

Consolidated 401(a) and 401(k) Program of Mass General Brigham and Member Organizations vs. nearby 401(k) plans in Massachusetts, assets vs. participants Scatter plot of 6 data points. 020000400006000080000 -10010203040 Total assets ($B) Participants Consolidated 401(a) and 401(k) Program of Mass General Brigham and Member Organizations, Total assets ($B): 0.645200306 · Participants: 5146Consolidated 401(a) and 401(k) Program of Mass General Brigham and Member OrganizationsFidelity Retirement Savings Plan, Total assets ($B): 34.201609937 · Participants: 66907Fidelity Retirement Savings PlanLiberty Mutual 401(k) Plan, Total assets ($B): 11.352606499 · Participants: 34618Liberty Mutual 401(k) PlanMassachusetts Institute of Technology Supplemental 401(k) Plan, Total assets ($B): 7.720373045 · Participants: 14762Massachusetts Institute of Technology Supplemental 401(k) PlanBoston Scientific Corporation 401(k) Retirement Savings Plan, Total assets ($B): 6.775289067 · Participants: 20639Boston Scientific Corporation 401(k) Retirement Savings PlanState Street Salary Savings Program, Total assets ($B): 6.532301643 · Participants: 12777State Street Salary Savings Program
Consolidated 401(a) and 401(k) Program of Mass General Brigham and Member Organizations vs. nearby 401(k) plans in Massachusetts, assets vs. participants
Compare Consolidated 401(a) and 401(k) Program of Mass General Brigham and Member Organizations side-by-side with 3 peers →

Scale composition for Consolidated 401(a) and 401(k) Program of Mass General Brigham and Member Organizations

Consolidated 401(a) and 401(k) Program of Mass General Brigham and Member Organizations reports $645M in end-of-year assets across 5,146 participants (0.005% of the $12.3T held by all Form 5500 filers in the national rollup , and 0.005% of 93,925,755 covered participants) - about $125,379 per participant (91% of the national average assets-per-participant) . Net income for plan year 2024 was $16M.

This plan identity (EIN 043230035, plan #500) has 3 Form 5500 filings on file from 2022 to 2024 , with end-of-year assets moving from $544M to $645M (+18.6%) while covered participants moved from 6,104 to 5,146 . Single-year sparse filers cannot show that trail.

Plan year Participants EOY assets Filing
2022 6,104 $544M Open filing
2023 5,766 $629M Open filing
2024 · index core 5,146 $645M This page

The same sponsor also keeps 2 other index-core plans on PlainRetire:

Consolidated 401(a) and 401(k) Program of Mass General Brigham and Member Organizations's out-of-state 401(k) peers by assets and headcount

Outside Massachusetts, the nearest 401(k) by assets is Hensel Phelps Salary Retirement Plan in CO ($646M); by covered participants it is IBEW Local No. 716 Retirement Plan in TX (5,147 participants). Same-state nearby plans are listed separately above.

Closest by plan assets

Nearest other-state filings by tot_assets_eoy ($645M here).

Similar participant headcount

Nearest other-state filings by covered participants (5,146 participants); asset peers above are excluded.

DOL Form 5500 plan year 2024. Asset totals can differ widely at the same headcount; neither axis is a quality rating.

Frequently Asked Questions

How did Consolidated 401(a) and 401(k) Program of Mass General Brigham and Member Organizations assets move in 2024? ▼
Consolidated 401(a) and 401(k) Program of Mass General Brigham and Member Organizations edged up modestly - up 2.6% during 2024, from $629M to $645M. Reported net income was $16M.
How have Mass General Brigham Incorporated plan assets changed over time? ▼
Across 3 plan years on file (2022-2024), Mass General Brigham Incorporated's sponsor-wide assets grew 33.5%, from $21.7B to $29.0B.
Where does Consolidated 401(a) and 401(k) Program of Mass General Brigham and Member Organizations rank by assets among Form 5500 filers? ▼
Consolidated 401(a) and 401(k) Program of Mass General Brigham and Member Organizations ranks in the 98th percentile by end-of-year assets among 123,622 plans that reported assets for plan year 2024 (in the top 5% of all filed plans by assets).
Which 401(k) plans are similar in size to Consolidated 401(a) and 401(k) Program of Mass General Brigham and Member Organizations? ▼
Among 401(k) plans in other states, the closest by assets is Hensel Phelps Salary Retirement Plan in CO ($646M, 3,081 participants).
Which 401(k) plans cover a similar participant headcount to Consolidated 401(a) and 401(k) Program of Mass General Brigham and Member Organizations? ▼
Among 401(k) plans in other states, the closest by covered participants is IBEW Local No. 716 Retirement Plan in TX (5,147 participants, $132M in assets).

Source: U.S. Department of Labor, Employee Benefits Security Administration (EBSA), Form 5500 public disclosure dataset. Plan year 2024.

Source: DOL EFAST2 filing system (efast.dol.gov) - original filing retrieval by EIN 043230035.

Read our methodology - how this data is sourced, computed, and verified.

Data sourced from U.S. Department of Labor Form 5500 filings (EBSA). See our methodology for details.