Defined Benefit (Pension) · DOL Form 5500 · 2024
Liberty Mutual Group Inc. Pension Plan
Data updated 2026-07-24
- $6.3B
- Total assets
- 34,910
- Participants
- 100th
- Percentile by assets
- $179,051
- Avg per participant
Official DOL plan name: Liberty Mutual Retirement Benefit Plan · Sponsored by Liberty Mutual Group Inc. · Massachusetts · Finance & Insurance
$6.3B in assets, 34,910 participants
Liberty Mutual Group Inc.'s Liberty Mutual Retirement Benefit Plan reported $6.3B in total assets and 34,910 participants in its 2024 DOL Form 5500 filing, ranking in the 100th 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.
- 100th percentile by assets (of 116,472 plans)
Coverage in Massachusetts
Liberty Mutual Retirement Benefit Plan covers 34,910 participants in Massachusetts, 54x the typical Massachusetts plan (state average ~641 per filing). Assets: $6.3B.
- $6.3B
- total plan assets (2024 EOY)
- 34,910
- covered participants
- 100th
- percentile by assets (of 116,472 plans)
- $179,051
- avg assets per participant
The plan reported a net loss of $563M for the year, a single-year figure driven by markets and benefit payments, not a measure of plan health.
What changed between DOL Form 5500 filings
plan year 2023 → plan year 2024
- Liberty Mutual Retirement Benefit Plan reported net income fell from $56M in the plan year 2023 filing to -$563M in the plan year 2024 filing.
- Liberty Mutual Retirement Benefit Plan end-of-year assets fell from $6.9B in the plan year 2023 filing to $6.3B in the plan year 2024 filing.
- Liberty Mutual Retirement Benefit Plan reported participants fell from 37,145 in the plan year 2023 filing to 34,910 in the plan year 2024 filing.
Participants vs Massachusetts filers
In Massachusetts, the average filing covers about 641 participants across 3,941 plans. Liberty Mutual Retirement Benefit Plan reports 34,910 participants - 54x that state average ($6.3B EOY assets).
Massachusetts filing particulars
| Total Assets (Beginning of Year) | $6.9B |
|---|---|
| Net Assets (End of Year) | $6.2B |
| Net Income | -$563M |
| Employer EIN | 043583679 |
| Plan Effective Date | 1951-05-01 |
| Filing Status | FILING RECEIVED |
Sponsor Plan History (Liberty Mutual Group Inc.)
| Year | Plans | Participants | Total Assets |
|---|---|---|---|
| 2022 | 2 | 65,930 | $15.6B |
| 2023 | 2 | 74,197 | $17.4B |
| 2024 | 2 | 69,528 | $17.6B |
Nearby Defined Benefit (Pension) Plans in Massachusetts
Peer Defined Benefit (Pension) plans, same state, same plan type, ranked by total assets.
Liberty Mutual Retirement Benefit Plan vs. nearby Defined Benefit (Pension) plans in Massachusetts, assets vs. participants
- Massachusetts Institute of Technology Basic Retirement Plan $5.9B · 12,533
- N. Atlantic States Carp. Pension Fund $5.1B · 16,946
- N. Atlantic States Carp. Guaranteed Annuity Fund $3.8B · 10,943
- Massachusetts Laborers' Pension Fund $2.5B · 10,203
- Massmutual Pension Plan $2.5B · 13,404
Similar-Sized Defined Benefit (Pension) Plans Nationally
Defined Benefit (Pension) plans in other states closest to Liberty Mutual Retirement Benefit Plan by total assets, not by location.
- Ntess Retirement Income Plan (NM) $6.2B · 3,323
- Sutter Health Retirement Plan (CA) $6.2B · 37,201
- Altria Retirement Plan (VA) $6.4B · 2,132
- Exelon Corporation Retirement Program (IL) $6.1B · 8,898
Frequently Asked Questions
How did Liberty Mutual Retirement Benefit Plan assets move in 2024? ▼
How have Liberty Mutual Group Inc. plan assets changed over time? ▼
Where does Liberty Mutual Retirement Benefit Plan rank by assets among Form 5500 filers? ▼
Which Defined Benefit (Pension) plans are similar in size to Liberty Mutual Retirement Benefit Plan? ▼
Next read for Liberty Mutual Retirement Benefit Plan
Filing takeaways
Ways to act on Liberty Mutual Retirement Benefit Plan's numbers.
- By total assets, Liberty Mutual Retirement Benefit Plan ranks among the largest 1% of all filed plans. See the largest plans
- Compare it side-by-side against 3 similar Defined Benefit (Pension) plans in Massachusetts. Compare plans
- Liberty Mutual Group Inc.'s sponsor-wide assets have grown 13.2% since 2022 across 3 plan years on file. More Finance & Insurance plans
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 043583679.
Read our methodology - how this data is sourced, computed, and verified.