401(k) · DOL Form 5500 · 2023

Commonwealth Fusion Systems LLC 401(k) Plan

Data updated 2026-08-25

$21M
Total assets Small plan by assets
371
Participants Below avg headcount
73rd
Percentile by assets National rank
$56,132
Avg per participant Low balance/head
PlainRetire home → About this data RSS: change history

Official DOL plan name: Cfs 401(k) Plan · Sponsored by Commonwealth Fusion Systems LLC · Massachusetts · Professional & Technical Services

$21M in assets, 371 participants

Commonwealth Fusion Systems LLC's Cfs 401(k) Plan reported $21M in total assets and 371 participants in its 2023 DOL Form 5500 filing, ranking in the 73rd 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.

  • #14,896 in Professional & Technical Services (20,321 peers)

Commonwealth Fusion Systems LLC multi-year trail

Commonwealth Fusion Systems LLC's plans moved +345.3% in assets from 2022 to 2024; this filing shows Cfs 401(k) Plan at $21M / 371 participants.

#14,896
in Professional & Technical Services (20,321 peers)
+129.5%
assets growth YoY

Cfs 401(k) Plan's outsized position by total assets

Cfs 401(k) Plan vs every filed plan by assets

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

$20,824,840 Top 27% higher than 73% 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

Cfs 401(k) Plan among mid-size filed plans by headcount

Plan-year 2023 Form 5500 filings with a reported participant count, partitioned by headcount band, not by assets. Cfs 401(k) Plan sits mid-pack in the medium band (371 participants).

What changed between DOL Form 5500 filings

plan year 2022 → plan year 2023

  • Cfs 401(k) Plan reported participants rose from 156 in the plan year 2022 filing to 371 in the plan year 2023 filing.
  • Cfs 401(k) Plan end-of-year assets rose from $9M in the plan year 2022 filing to $21M in the plan year 2023 filing.
  • Cfs 401(k) Plan reported net income rose from $6M in the plan year 2022 filing to $12M in the plan year 2023 filing.

See the national 2022→2023 release diff →

Published 5500 schedule card

Filing strip 823262257 · Commonwealth Fusion Systems LLC PY 2023 · 401(k)

Cfs 401(k) Plan · $21M · 371 · 73rd

  • EOY $21M
  • EOY 371
  • EOY 73rd
  • EOY 401(k)
  • EOY near Homedics 401(k) Savings Plan
  • EOY ind #14896

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 Professional & Technical Services retirement plans → · Plans in Massachusetts →

Cfs 401(k) Plan in the asset neighbourhood

Pacific Mobile Structures, Inc. 401(k) Retirement PlanPacific Mobile Structures, I…$21MForbes Retirement Plan$21MCfs 401(k) Plan$21MHomedics 401(k) Savings Plan$21MIntertrust Technologies Corporation 401(k) Savings PlanIntertrust Technologies Corp…$21M
End-of-year total assets ($M) among Cfs 401(k) Plan and nearest nationwide 401(k) peers. Source: DOL Form 5500 plan year 2023.

Commonwealth Fusion Systems LLC multi-year asset trail

Sponsor-wide plan assets over time

All Commonwealth Fusion Systems LLC plans reported in each filing year

Latest sponsor-wide plan assets
$40M 345.31213984415047% vs 2022
2024 filing year
$0M$10M$20M$30M$40M$50M 202220232024 $9.08M $40.4M ▲ +345.2%
Year Plans Participants Total Assets
2022 1 156 $9M
2023 1 371 $21M
2024 1 589 $40M

Commonwealth Fusion Systems LLC filing trail (2023)

Total Assets (Beginning of Year)$9M
Net Assets (End of Year)$21M
Net Income$12M
Employer EIN823262257
Plan Effective Date2021-01-01
Filing StatusFILING RECEIVED

Nearby 401(k) Plans in Massachusetts

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

Cfs 401(k) Plan vs. nearby 401(k) plans in Massachusetts, assets vs. participants Scatter plot of 6 data points. -20000020000400006000080000 -10010203040 Total assets ($B) Participants Cfs 401(k) Plan, Total assets ($B): 0.02082484 · Participants: 371Cfs 401(k) PlanFidelity 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
Cfs 401(k) Plan vs. nearby 401(k) plans in Massachusetts, assets vs. participants
Compare Cfs 401(k) Plan side-by-side with 3 peers →

Cfs 401(k) Plan's out-of-state 401(k) peers by assets and headcount

Outside Massachusetts, the nearest 401(k) by assets is Homedics 401(k) Savings Plan in MI ($21M); by covered participants it is Fis 401(k) Plan in OK (371 participants). Same-state nearby plans are listed separately above.

Closest by plan assets

Nearest other-state filings by tot_assets_eoy ($21M here).

Similar participant headcount

Nearest other-state filings by covered participants (371 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 Cfs 401(k) Plan assets move in 2023? ▼
Cfs 401(k) Plan surged - up 129.5% during 2023, from $9M to $21M. Reported net income was $12M.
How have Commonwealth Fusion Systems LLC plan assets changed over time? ▼
Across 3 plan years on file (2022-2024), Commonwealth Fusion Systems LLC's sponsor-wide assets grew 345.3%, from $9M to $40M.
Which 401(k) plans are similar in size to Cfs 401(k) Plan? ▼
Among 401(k) plans in other states, the closest by assets is Homedics 401(k) Savings Plan in MI ($21M, 227 participants).
Which 401(k) plans cover a similar participant headcount to Cfs 401(k) Plan? ▼
Among 401(k) plans in other states, the closest by covered participants is Fis 401(k) Plan in OK (371 participants, N/A 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 823262257.

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.