Defined Benefit (Pension) · DOL Form 5500 · 2024
Liberty Mutual Group Inc. Pension Plan
Data updated 2026-08-25
- $6.3B
- Total assets Very large vs avg
- 34,910
- Participants Very large workforce
- 100th
- Percentile by assets National rank
- $179,051
- Avg per participant Above avg balance/head
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.
- #8,511 in Finance & Insurance (8,549 peers)
Coverage in Massachusetts
Liberty Mutual Retirement Benefit Plan covers 34,910 participants in Massachusetts, 53x the typical Massachusetts plan (state average ~659 per filing). Assets: $6.3B.
- #8,511
- in Finance & Insurance (8,549 peers)
- -9.3%
- assets change YoY
- 63×
- vs typical plan assets (national mean)
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.
Liberty Mutual Retirement Benefit Plan's outsized position by total assets
Liberty Mutual Retirement Benefit Plan vs every filed plan by assets
End-of-year total assets · plan year 2024 · DOL Form 5500
$6,250,686,483 Highest reported value at or above every one of 123,620 filed plans
Dashed line + filled bar = this entry, among filed plans.
Source U.S. Department of Labor Form 5500 filings (EBSA) · plan year 2024
Liberty Mutual Retirement Benefit Plan's mega-plan peer group by participant headcount
Plan-year 2024 Form 5500 filings with a reported participant count, partitioned by headcount band, not by assets. Liberty Mutual Retirement Benefit Plan is a mega filing (34,910 participants), the rightmost band on the breakdown.
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.
Plan-year Form 5500 strip
Filing strip 043583679 · Liberty Mutual Group Inc. PY 2024 · Defined Benefit (Pension)
Liberty Mutual Retirement Benefit Plan · $6.3B · 34,910 · 100th
- ASSETS $6.3B
- PCT 34,910
- EIN 100th
- RANK Defined Benefit (Pension)
- PHOTO near Ntess Retirement Income Plan
- IND ind #8511
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 Finance & Insurance retirement plans → · Plans in Massachusetts →
Liberty Mutual Retirement Benefit Plan in the asset neighbourhood
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.)
Sponsor-wide plan assets over time
All Liberty Mutual Group Inc. plans reported in each filing year
- Latest sponsor-wide plan assets
- $17.6B 13.170791316782784% vs 2022
- 2024 filing year
| 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.
- Consolidated Cash Balance Program of Mass General Brigham and Member Organizations $11.6B · 60,621
- New England Teamsters Pension Fund $9.1B · 21,577
- 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
Scale composition for Liberty Mutual Retirement Benefit Plan
Liberty Mutual Retirement Benefit Plan reports $6.3B in end-of-year assets across 34,910 participants (0.051% of the $12.3T held by all Form 5500 filers in the national rollup , and 0.037% of 93,925,755 covered participants) - about $179,051 per participant (1.3x the national average assets-per-participant) . Net income for plan year 2024 was -$563M.
This plan identity (EIN 043583679, plan #001) has 3 Form 5500 filings on file from 2022 to 2024 , with end-of-year assets moving from $6.8B to $6.3B (-7.5%) while covered participants moved from 33,087 to 34,910 . Single-year sparse filers cannot show that trail.
| Plan year | Participants | EOY assets | Filing |
|---|---|---|---|
| 2022 | 33,087 | $6.8B | Open filing |
| 2023 | 37,145 | $6.9B | Open filing |
| 2024 · index core | 34,910 | $6.3B | This page |
The same sponsor also keeps 1 other index-core plan on PlainRetire:
- Liberty Mutual 401(k) Plan (401(k), $11.4B, 34,618 participants)
Liberty Mutual Retirement Benefit Plan's out-of-state Defined Benefit (Pension) peers by assets and headcount
Outside Massachusetts, the nearest Defined Benefit (Pension) by assets is Ntess Retirement Income Plan in NM ($6.2B); by covered participants it is Rtx Consolidated Pension Plan in CT (36,180 participants). Same-state nearby plans are listed separately above.
Closest by plan assets
Nearest other-state filings by tot_assets_eoy ($6.3B here).
- Ntess Retirement Income Plan (NM) $6.2B · 3,323
- Sutter Health Retirement Plan (CA) $6.2B · 37,201
- Mid-America Carpenters Regional Council Pension Fund (IL) $6.4B · 10,902
- Altria Retirement Plan (VA) $6.4B · 2,132
Similar participant headcount
Nearest other-state filings by covered participants (34,910 participants); asset peers above are excluded.
- Rtx Consolidated Pension Plan (CT) 36,180 · 1,270 off
- Allstate Retirement Plan (TX) 33,495 · 1,415 off
- Central States, Southeast & Southwest Areas Pension Plan (IL) 36,799 · 1,889 off
- 1199seiu Home Care Employees Pension Fund (NY) 32,875 · 2,035 off
DOL Form 5500 plan year 2024. Asset totals can differ widely at the same headcount; neither axis is a quality rating.