Plan Ledger DOL Form 5500 · updated monthly

Mevion Medical Systems Inc.401(k)

MEVION MEDICAL SYSTEMS INC. 401(K) PROFIT SHARING PLAN · LITTLETON, MA · plan year 2024

Reported admin expense ratio · 2024
0.09%

Peer grade: A- · admin costs + employer contributions vs same-size plans · how grading works

Mevion Medical Systems Inc. reported $16,521 in plan administrative expenses for 2024: 0.09% of average plan assets, lower than ~75% of peers. Employer contributions averaged $3,395 per active participant. This ratio covers administrative expenses reported on the plan's Schedule H only; fund-level expense ratios are not included in public structured data — see methodology.

Across the 2 years on file its reported administrative ratio fell from 0.16% to 0.09%. The plan sits in the $10M–$50M size bracket, benchmarked here against 27,838 comparable plans and shown alongside other professional & technical services employers. By assets it is the 1,326th-largest of 2,726 plans among Massachusetts employers on file, and the 5,624th of 11,654 in professional & technical services. In 2024, employees put in $3.51 for every $1.00 the employer contributed; active participation has shrunk from 172 to 143 since 2022.

Plan summary
Net assets, end of year$19,619,365
Participants with balances204
Active participants143
Employer contributions$485,420
Employee contributions$1,704,192
Employer contribution per active participant$3,395
Average account balance$96,173
Benefits paid to participants$1,867,763
Plan auditUnmodified (clean) audit opinion
Plan history3
Yearassets · accounts · employer contribution
2024$19.6M · 204 accts · $485K emplr
2023$16.8M · 218 accts · $480K emplr
2022$12.6M · 243 accts · $377K emplr
Administrative expenses, itemized · 2024
Investment management$15,000
Total administrative$16,521
The Mevion Medical Systems Inc. 401(k) match · 2024
Employer contribution per active participant$3,395
Median for plans this size$2,416
2024$3,395 per active participant
2023$2,824 per active participant
2022$2,193 per active participant

Mevion Medical Systems Inc.'s 2024 employer contribution ran above the $2,416 median for plans its size. Filings report dollars actually contributed, not the match formula; the formula itself (for example, 50% of the first 6% of pay) lives in the plan's summary plan description from HR.

What these fees cost you

Annual cost at the plan's reported 2024 administrative ratio, against the median plan its size; fund expense ratios are extra. Compare any plan.

Service providers · 20242
NEW WEALTH ADVISORS, LLC · Investment advisory (plan)$15,000
JPMORGAN INVEST HOLDINGS LLC$721

Compensation shown is direct payments from plan assets reported on Schedule C. Providers paid through fund revenue-sharing appear as indirect.

Administrative cost history3
2024$16,521 · 0.09%
2023$20,951 · 0.14%
2022$20,390 · 0.16%
Same employer
Similar plansProfessional & Technical Services · Massachusetts
Connelly Partners, LLC MA$20.4M · 0.18%
Gray, Gray & Gray LLP MA$19.9M · 0.21%
Avania, LLC MA$19.5M · 0.08%
Treeline Biosciences, Inc. MA$19.5M · 0.01%
Amryt Pharmaceuticals, Inc. MA$19.5M · 0.35%
Curis, Inc. MA$19.5M · 0.01%

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Source: U.S. Department of Labor, Form 5500 series, EIN 200794350 · Verify on EFAST2 · Amounts are as reported by the plan sponsor for the plan year shown.