Defined Benefit (Pension) · DOL Form 5500 · 2023

Massachusetts Mutual Life Insurance Company Pension Plan

Data updated 2026-08-25

$2.6B
Total assets Very large vs avg
14,462
Participants Very large workforce
99th
Percentile by assets National rank
$179,057
Avg per participant Above avg balance/head
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Official DOL plan name: Massmutual Pension Plan · Sponsored by Massachusetts Mutual Life Insurance Company · Massachusetts · Finance & Insurance

$2.6B in assets, 14,462 participants

Massachusetts Mutual Life Insurance Company's Massmutual Pension Plan reported $2.6B in total assets and 14,462 participants in its 2023 DOL Form 5500 filing, ranking in the 99th 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.

  • #8,769 in Finance & Insurance (8,869 peers)

Coverage in Massachusetts

Massmutual Pension Plan covers 14,462 participants in Massachusetts, 22x the typical Massachusetts plan (state average ~659 per filing). Assets: $2.6B.

#8,769
in Finance & Insurance (8,869 peers)
+2.4%
assets growth YoY
26×
vs typical plan assets (national mean)

Massmutual Pension Plan's outsized position by total assets

Massmutual Pension Plan vs every filed plan by assets

End-of-year total assets · plan year 2023 · DOL Form 5500

$2,589,519,071 Top 1% higher than 99% 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

Massmutual Pension Plan's mega-plan peer group by participant headcount

Plan-year 2023 Form 5500 filings with a reported participant count, partitioned by headcount band, not by assets. Massmutual Pension Plan is a mega filing (14,462 participants), the rightmost band on the breakdown.

What changed between DOL Form 5500 filings

plan year 2022 → plan year 2023

  • Massmutual Pension Plan reported net income rose from -$620M in the plan year 2022 filing to $13M in the plan year 2023 filing.
  • Massmutual Pension Plan end-of-year assets rose from $2.5B in the plan year 2022 filing to $2.6B in the plan year 2023 filing.
  • Massmutual Pension Plan reported participants fell from 14,729 in the plan year 2022 filing to 14,462 in the plan year 2023 filing.

See the national 2022→2023 release diff →

Plan-year Form 5500 strip

Filing strip 041590850 · Massachusetts Mutual Life Insurance Company PY 2023 · Defined Benefit (Pension)

Massmutual Pension Plan · $2.6B · 14,462 · 99th

  • EBSA $2.6B
  • PART 14,462
  • TYPE 99th
  • NET Defined Benefit (Pension)
  • BOOK near Caterpillar Inc. Non-Contributory Pension Plan
  • VS-ST ind #8769

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 →

Massmutual Pension Plan in the asset neighbourhood

Sound Retirement Trust$2.6BBurlington Northern Santa Fe Retirement PlanBurlington Northern Santa Fe…$2.6BPension Plan for Eaton Corporation EmployeesPension Plan for Eaton Corpo…$2.6BMassmutual Pension Plan$2.6BCaterpillar Inc. Non-Contributory Pension PlanCaterpillar Inc. Non-Contrib…$2.6B
End-of-year total assets ($B) among Massmutual Pension Plan and nearest nationwide Defined Benefit (Pension) peers. Source: DOL Form 5500 plan year 2023.

Massachusetts filing particulars

Total Assets (Beginning of Year)$2.5B
Net Assets (End of Year)$2.5B
Net Income$13M
Employer EIN041590850
Plan Effective Date1948-01-01
Filing StatusFILING RECEIVED

Sponsor Plan History (Massachusetts Mutual Life Insurance Company)

Sponsor-wide plan assets over time

All Massachusetts Mutual Life Insurance Company plans reported in each filing year

Latest sponsor-wide plan assets
$7.0B 12.184255137909904% vs 2022
2024 filing year
$6B$6.5B$7B$7.5B 202220232024 $6.23B $6.98B ▲ +12.0%
Year Plans Participants Total Assets
2022 4 30,601 $6.2B
2023 4 29,481 $6.7B
2024 4 27,323 $7.0B

Nearby Defined Benefit (Pension) Plans in Massachusetts

Peer Defined Benefit (Pension) plans, same state, same plan type, ranked by total assets.

Massmutual Pension Plan vs. nearby Defined Benefit (Pension) plans in Massachusetts, assets vs. participants Scatter plot of 6 data points. 020000400006000080000 24681012 Total assets ($B) Participants Massmutual Pension Plan, Total assets ($B): 2.589519071 · Participants: 14462Massmutual Pension PlanConsolidated Cash Balance Program of Mass General Brigham and Member Organizations, Total assets ($B): 10.325856564 · Participants: 58745Consolidated Cash Balance Program of Mass General Brigham and Member OrganizationsNew England Teamsters Pension Fund, Total assets ($B): 9.092299586 · Participants: 21786New England Teamsters Pension FundLiberty Mutual Retirement Benefit Plan, Total assets ($B): 6.892259637 · Participants: 37145Liberty Mutual Retirement Benefit PlanMassachusetts Institute of Technology Basic Retirement Plan, Total assets ($B): 5.381626447 · Participants: 11888Massachusetts Institute of Technology Basic Retirement PlanN. Atlantic States Carp. Pension Fund, Total assets ($B): 4.973349354 · Participants: 17166N. Atlantic States Carp. Pension Fund
Massmutual Pension Plan vs. nearby Defined Benefit (Pension) plans in Massachusetts, assets vs. participants
Compare Massmutual Pension Plan side-by-side with 3 peers →

Scale composition for Massmutual Pension Plan

Massmutual Pension Plan reports $2.6B in end-of-year assets across 14,462 participants (0.021% of the $12.3T held by all Form 5500 filers in the national rollup , and 0.015% of 93,925,755 covered participants) - about $179,057 per participant (1.3x the national average assets-per-participant) . Net income for plan year 2023 was $13M.

This plan identity (EIN 041590850, plan #001) has 3 Form 5500 filings on file from 2022 to 2024 , with end-of-year assets moving from $2.5B to $2.5B (-1.0%) while covered participants moved from 14,729 to 13,404 . Single-year sparse filers cannot show that trail.

Plan year Participants EOY assets Filing
2022 14,729 $2.5B Open filing
2023 14,462 $2.6B This page
2024 · index core 13,404 $2.5B Open filing

The same sponsor also keeps 3 other index-core plans on PlainRetire:

Massmutual Pension Plan's out-of-state Defined Benefit (Pension) peers by assets and headcount

Outside Massachusetts, the nearest Defined Benefit (Pension) by assets is Caterpillar Inc. Non-Contributory Pension Plan in TX ($2.6B); by covered participants it is Duke Energy Retirement Cash Balance Plan in NC (14,485 participants). Same-state nearby plans are listed separately above.

Closest by plan assets

Nearest other-state filings by tot_assets_eoy ($2.6B here).

Similar participant headcount

Nearest other-state filings by covered participants (14,462 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 Massmutual Pension Plan assets move in 2023? ▼
Massmutual Pension Plan edged up modestly - up 2.4% during 2023, from $2.5B to $2.6B. Reported net income was $13M.
How have Massachusetts Mutual Life Insurance Company plan assets changed over time? ▼
Across 3 plan years on file (2022-2024), Massachusetts Mutual Life Insurance Company's sponsor-wide assets grew 12.2%, from $6.2B to $7.0B.
Where does Massmutual Pension Plan rank by assets among Form 5500 filers? ▼
Massmutual Pension Plan ranks in the 99th percentile by end-of-year assets among 127,072 plans that reported assets for plan year 2023 (among the largest 1% of all filed plans).
Which Defined Benefit (Pension) plans are similar in size to Massmutual Pension Plan? ▼
Among Defined Benefit (Pension) plans in other states, the closest by assets is Caterpillar Inc. Non-Contributory Pension Plan in TX ($2.6B, 1,921 participants).
Which Defined Benefit (Pension) plans cover a similar participant headcount to Massmutual Pension Plan? ▼
Among Defined Benefit (Pension) plans in other states, the closest by covered participants is Duke Energy Retirement Cash Balance Plan in NC (14,485 participants, $4.0B 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 041590850.

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.