401(k) · DOL Form 5500 · 2024

Mevion Medical Systems Inc. 401(k) Plan

Data updated 2026-08-25

$20M
Total assets Small plan by assets
177
Participants Small participant base
70th
Percentile by assets National rank
$110,844
Avg per participant Below avg balance/head
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Official DOL plan name: Mevion Medical Systems Inc. 401(k) Profit Sharing Plan · Sponsored by Mevion Medical Systems Inc. · Massachusetts · Professional & Technical Services

$20M in assets, 177 participants

Mevion Medical Systems Inc.'s Mevion Medical Systems Inc. 401(k) Profit Sharing Plan reported $20M in total assets and 177 participants in its 2024 DOL Form 5500 filing, ranking in the 70th 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.

  • #13,943 in Professional & Technical Services (20,173 peers)

Coverage in Massachusetts

Mevion Medical Systems Inc. 401(k) Profit Sharing Plan covers 177 participants in Massachusetts, about 27% of the average Massachusetts filer (state average ~659 per filing). Assets: $20M.

#13,943
in Professional & Technical Services (20,173 peers)
+16.5%
assets growth YoY

Mevion Medical Systems Inc. 401(k) Profit Sharing Plan's outsized position by total assets

Mevion Medical Systems Inc. 401(k) Profit Sharing Plan vs every filed plan by assets

End-of-year total assets · plan year 2024 · DOL Form 5500

$19,619,365 Top 30% higher than 70% of 123,620 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 2024

Mevion Medical Systems Inc. 401(k) Profit Sharing Plan among mid-size filed plans by headcount

Plan-year 2024 Form 5500 filings with a reported participant count, partitioned by headcount band, not by assets. Mevion Medical Systems Inc. 401(k) Profit Sharing Plan sits mid-pack in the medium band (177 participants).

What changed between DOL Form 5500 filings

plan year 2023 → plan year 2024

  • Mevion Medical Systems Inc. 401(k) Profit Sharing Plan reported net income fell from $4M in the plan year 2023 filing to $3M in the plan year 2024 filing.
  • Mevion Medical Systems Inc. 401(k) Profit Sharing Plan end-of-year assets rose from $17M in the plan year 2023 filing to $20M in the plan year 2024 filing.
  • Mevion Medical Systems Inc. 401(k) Profit Sharing Plan reported participants rose from 172 in the plan year 2023 filing to 177 in the plan year 2024 filing.

See the national 2023→2024 release diff →

DOL schedule card

Filing strip 200794350 · Mevion Medical Systems Inc. PY 2024 · 401(k)

Mevion Medical Systems Inc. 401(k) Profit Sharing Plan · $20M · 177 · 70th

  • BOY $20M
  • SCH 177
  • EBSA 70th
  • PART 401(k)
  • TYPE near Global Educational Excellence 401(k) Profit Sharing Plan
  • NET ind #13943

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 →

Mevion Medical Systems Inc. 401(k) Profit Sharing Plan in the asset neighbourhood

Mevion Medical Systems Inc. 401(k) Profit Sharing PlanMevion Medical Systems Inc. …$20MGlobal Educational Excellence 401(k) Profit Sharing PlanGlobal Educational Excellenc…$20MAlert Media, Inc. 401(k) Plan$20MSt. Clair Specialty Physicians, P. C. Employees'St. Clair Specialty Physicia…$20MIodine Software LLC 401(k) PlanIodine Software LLC 401(k) P…$20M
End-of-year total assets ($M) among Mevion Medical Systems Inc. 401(k) Profit Sharing Plan and nearest nationwide 401(k) peers. Source: DOL Form 5500 plan year 2024.

Massachusetts filing particulars

Total Assets (Beginning of Year)$17M
Net Assets (End of Year)$20M
Net Income$3M
Employer EIN200794350
Plan Effective Date2006-01-01
Filing StatusFILING RECEIVED

Sponsor Plan History (Mevion Medical Systems Inc.)

Sponsor-wide plan assets over time

All Mevion Medical Systems Inc. plans reported in each filing year

Latest sponsor-wide plan assets
$20M 55.93700068441232% vs 2022
2024 filing year
$10M$15M$20M$25M 202220232024 $12.6M $19.6M ▲ +56.0%
Year Plans Participants Total Assets
2022 1 166 $13M
2023 1 172 $17M
2024 1 177 $20M

Nearby 401(k) Plans in Massachusetts

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

Mevion Medical Systems Inc. 401(k) Profit Sharing Plan vs. nearby 401(k) plans in Massachusetts, assets vs. participants Scatter plot of 6 data points. -20000020000400006000080000 -10010203040 Total assets ($B) Participants Mevion Medical Systems Inc. 401(k) Profit Sharing Plan, Total assets ($B): 0.019619365 · Participants: 177Mevion Medical Systems Inc. 401(k) Profit Sharing PlanFidelity Retirement Savings Plan, Total assets ($B): 34.201609937 · Participants: 66907Fidelity Retirement Savings PlanLiberty Mutual 401(k) Plan, Total assets ($B): 11.352606499 · Participants: 34618Liberty Mutual 401(k) PlanMassachusetts Institute of Technology Supplemental 401(k) Plan, Total assets ($B): 7.720373045 · Participants: 14762Massachusetts Institute of Technology Supplemental 401(k) PlanBoston Scientific Corporation 401(k) Retirement Savings Plan, Total assets ($B): 6.775289067 · Participants: 20639Boston Scientific Corporation 401(k) Retirement Savings PlanState Street Salary Savings Program, Total assets ($B): 6.532301643 · Participants: 12777State Street Salary Savings Program
Mevion Medical Systems Inc. 401(k) Profit Sharing Plan vs. nearby 401(k) plans in Massachusetts, assets vs. participants
Compare Mevion Medical Systems Inc. 401(k) Profit Sharing Plan side-by-side with 3 peers →

Mevion Medical Systems Inc. 401(k) Profit Sharing Plan's out-of-state 401(k) peers by assets and headcount

Outside Massachusetts, the nearest 401(k) by assets is Global Educational Excellence 401(k) Profit Sharing Plan in MI ($20M); by covered participants it is Greater Houston Retailers Association 401(k) Plan in TX (177 participants). Same-state nearby plans are listed separately above.

Similar participant headcount

Nearest other-state filings by covered participants (177 participants); asset peers above are excluded.

DOL Form 5500 plan year 2024. Asset totals can differ widely at the same headcount; neither axis is a quality rating.

Frequently Asked Questions

How did Mevion Medical Systems Inc. 401(k) Profit Sharing Plan assets move in 2024? ▼
Mevion Medical Systems Inc. 401(k) Profit Sharing Plan grew sharply - up 16.5% during 2024, from $17M to $20M. Reported net income was $3M.
How have Mevion Medical Systems Inc. plan assets changed over time? ▼
Across 3 plan years on file (2022-2024), Mevion Medical Systems Inc.'s sponsor-wide assets grew 55.9%, from $13M to $20M.
Which 401(k) plans are similar in size to Mevion Medical Systems Inc. 401(k) Profit Sharing Plan? ▼
Among 401(k) plans in other states, the closest by assets is Global Educational Excellence 401(k) Profit Sharing Plan in MI ($20M, 630 participants).
Which 401(k) plans cover a similar participant headcount to Mevion Medical Systems Inc. 401(k) Profit Sharing Plan? ▼
Among 401(k) plans in other states, the closest by covered participants is Greater Houston Retailers Association 401(k) Plan in TX (177 participants, $496K in assets).

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 200794350.

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.