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  1. Companies/
  2. Isthmus Engineering and Manufacturi

Filings through Oct 24, 2026.

Isthmus Engineering and Manufacturi

EIN 39-1422973-industrial automation-Latest filing 2025
Plans
1
Retirement
1
$33.6M assets
Health & Benefits
0
Participants
92
4035 OWL CREEK DRIVE - MADISON, WI 53718608-512-1114isthmuseng.comLinkedIn51-200 employeesindustrial automation
Plans on this EIN
1 filing
#001401(k)-$33.6M - 92 part

Plan summaries

The plan page shows fees vs peers, audit grade, asset history, contributions and Schedule C providers.

Retirement#001

ISTHMUS ENGINEERING AND MANUFACTURING EMPLOYEES' RETIREMENT PLAN

401(k)

Assets$33.6M
Participants92
On the plan page
Fees vs peersAudit gradeAsset trajectoryContributionsSch C providers
Open plan
This company has one plan on file. Open the plan page to see all of its data.

Retirement plans

1 plan on this EIN

PlanNameTypeAssetsParticipantsLatest year
#001ISTHMUS ENGINEERING AND MANUFACTURING EMPLOYEES' RETIREMENT PLAN401(k)$33.6M922025
  • ISTHMUS ENGINEERING AND MANUFACTURING EMPLOYEES' RETIREMENT PLAN$33.6M
    #001 · 401(k) · 202592
Retirement plans
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