Plan Ledger DOL Form 5500 · updated monthly

Mayville Engineering Company, Inc401(k)

MAYVILLE ENGINEERING COMPANY, INC. 401(K) PLAN · MILWAUKEE, WI · plan year 2025

Reported admin expense ratio · 2025
0.10%

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

Mayville Engineering Company, Inc reported $172,470 in plan administrative expenses for 2025: 0.10% of average plan assets, below the peer median. Employer contributions averaged $1,450 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 3 years on file its reported administrative ratio fell from 0.29% to 0.10%. The plan sits in the $50M–$250M size bracket, benchmarked here against 605 comparable plans and shown alongside other manufacturing employers. By assets it is the 143rd-largest of 1,936 plans among Wisconsin employers on file, and the 1,230th of 13,661 in manufacturing. In 2025, employees put in $2.72 for every $1.00 the employer contributed; active participation has grown from 2,134 to 2,366 since 2022.

Plan summary
Net assets, end of year$184,241,863
Participants with balances2,517
Active participants2,366
Employer contributions$3,431,205
Employee contributions$9,326,095
Employer contribution per active participant$1,450
Average account balance$73,199
Benefits paid to participants$27,849,138
Plan auditUnmodified (clean) audit opinion
AuditorWIPFLI LLP
Plan history4
Yearassets · accounts · employer contribution
2025$184.2M · 2,517 accts · $3.4M emplr
2024$156.1M · 2,652 accts · $3.4M emplr
2023$149.6M · 2,989 accts · $3.4M emplr
2022$117.6M · 2,904 accts · $2.5M emplr
Administrative expenses, itemized · 2025
Recordkeeping & contract admin$172,470
Total administrative$172,470
The Mayville Engineering Company, Inc 401(k) match · 2025
Employer contribution per active participant$1,450
Median for plans this size$4,093
2025$1,450 per active participant
2024$1,540 per active participant
2023$1,395 per active participant
2022$1,172 per active participant

Mayville Engineering Company, Inc's 2025 employer contribution ran below the $4,093 median for plans its size, in the bottom quarter of its peers. 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 2025 administrative ratio, against the median plan its size; fund expense ratios are extra. Compare any plan.

Service providers · 20251
PRINCIPAL LIFE INSURANCE COMPANY · Contract administrator · Loan processing$172,470

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

Administrative cost history4
2025$172,470 · 0.10%
2024$214,735 · 0.14%
2023$237,645 · 0.18%
2022$359,303 · 0.29%
All plans at this employer2
MAYVILLE ENGINEERING COMPANY, INC. EMPLOYEE STOCK OWNERSHIP PLANESOP
MAYVILLE ENGINEERING COMPANY, INC. 401(K) PLAN401(k)
Same employer
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Source: U.S. Department of Labor, Form 5500 series, EIN 390944729 · Verify on EFAST2 · Amounts are as reported by the plan sponsor for the plan year shown.