401(k) · DOL Form 5500 · 2023

Mass General Brigham Incorporated 401(k) Plan

Data updated 2026-08-25

$629M
Total assets Above avg plan size
5,766
Participants Above avg headcount
98th
Percentile by assets National rank
$109,060
Avg per participant Below 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

$629M in assets, 5,766 participants

Mass General Brigham Incorporated's Consolidated 401(a) and 401(k) Program of Mass General Brigham and Member Organizations reported $629M in total assets and 5,766 participants in its 2023 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.

  • #17,331 in Healthcare & Social Assistance (17,684 peers)

Coverage in Massachusetts

Consolidated 401(a) and 401(k) Program of Mass General Brigham and Member Organizations covers 5,766 participants in Massachusetts, 8.8x the typical Massachusetts plan (state average ~659 per filing). Assets: $629M.

#17,331
in Healthcare & Social Assistance (17,684 peers)
+15.6%
assets growth YoY
6.3×
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 2023 · DOL Form 5500

$628,837,764 Top 2% higher than 98% of 127,068 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 2023

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

Plan-year 2023 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 (5,766 participants).

What changed between DOL Form 5500 filings

plan year 2022 → plan year 2023

  • Consolidated 401(a) and 401(k) Program of Mass General Brigham and Member Organizations reported net income rose from $29M in the plan year 2022 filing to $85M in the plan year 2023 filing.
  • Consolidated 401(a) and 401(k) Program of Mass General Brigham and Member Organizations end-of-year assets rose from $544M in the plan year 2022 filing to $629M in the plan year 2023 filing.
  • Consolidated 401(a) and 401(k) Program of Mass General Brigham and Member Organizations reported participants fell from 6,104 in the plan year 2022 filing to 5,766 in the plan year 2023 filing.

See the national 2022→2023 release diff →

EBSA filing schedule strip

Filing strip 043230035 · Mass General Brigham Incorporated PY 2023 · 401(k)

Consolidated 401(a) and 401(k) Program of Mass General Brigham and Member Organizations · $629M · 5,766 · 98th

  • NET $629M
  • NET 5,766
  • NET 98th
  • NET 401(k)
  • NET near Gensler 401(k) Savings Plan
  • NET ind #17331

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

Williams-Sonoma, Inc. 401(k) PlanWilliams-Sonoma, Inc. 401(k)…$629MTake-Two Interactive Software, Inc. 401(k) PlanTake-Two Interactive Softwar…$629MGensler 401(k) Savings Plan$629MConsolidated 401(a) and 401(k) Program of Mass General Brigham and Member OrganizationsConsolidated 401(a) and 401(…$629MCsg Incentive Savings Plan$629M
End-of-year total assets ($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 2023.

Massachusetts filing particulars

Total Assets (Beginning of Year)$544M
Net Assets (End of Year)$629M
Net Income$85M
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): 0.628837764 · Participants: 5766Consolidated 401(a) and 401(k) Program of Mass General Brigham and Member OrganizationsFidelity Retirement Savings Plan, Total assets ($B): 28.649852331 · Participants: 62289Fidelity Retirement Savings PlanLiberty Mutual 401(k) Plan, Total assets ($B): 10.556596852 · Participants: 37052Liberty Mutual 401(k) PlanMassachusetts Institute of Technology Supplemental 401(k) Plan, Total assets ($B): 6.829912863 · Participants: 14094Massachusetts Institute of Technology Supplemental 401(k) PlanBoston Scientific Corporation 401(k) Retirement Savings Plan, Total assets ($B): 5.786107181 · Participants: 19881Boston Scientific Corporation 401(k) Retirement Savings PlanPhilips North America 401(k) Plan, Total assets ($B): 5.779286156 · Participants: 19120Philips North America 401(k) Plan
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 $629M in end-of-year assets across 5,766 participants (0.005% of the $12.3T held by all Form 5500 filers in the national rollup , and 0.006% of 93,925,755 covered participants) - about $109,060 per participant (79% of the national average assets-per-participant) . Net income for plan year 2023 was $85M.

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 This page
2024 · index core 5,146 $645M Open filing

The same sponsor also keeps 3 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 Gensler 401(k) Savings Plan in CA ($629M); by covered participants it is Team Select Holding, LLC 401(k) Retirement Plan in AZ (5,766 participants). Same-state nearby plans are listed separately above.

Closest by plan assets

Nearest other-state filings by tot_assets_eoy ($629M here).

Similar participant headcount

Nearest other-state filings by covered participants (5,766 participants); asset peers above are excluded.

DOL Form 5500 plan year 2023. 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 2023? ▼
Consolidated 401(a) and 401(k) Program of Mass General Brigham and Member Organizations grew sharply - up 15.6% during 2023, from $544M to $629M. Reported net income was $85M.
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 127,072 plans that reported assets for plan year 2023 (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 Gensler 401(k) Savings Plan in CA ($629M, 4,702 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 Team Select Holding, LLC 401(k) Retirement Plan in AZ (5,766 participants, $15M in assets).

Source: U.S. Department of Labor, Employee Benefits Security Administration (EBSA), Form 5500 public disclosure dataset. Plan year 2023.

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.