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  2. Cox Engineering Company
  • Retirement analytics
  • Benefits analytics
  • Plan summaries
  • Retirement plans
  • Health & Benefits plans

Filings through Oct 24, 2026.

Cox Engineering Company

EIN 04-2017923-defense & space-Latest filing 2025
Plans
3
Retirement
2
$30.7M assets
Health & Benefits
1
$2.8M premiums
Participants
631
21 PACELLA PARK DR - RANDOLPH, MA 02368339-832-0135LinkedIn1-10 employeesdefense & space
Plans on this EIN
3 filings
#001401(k)-$26.9M - 197 part#002401(k)-$3.8M - 141 part#501Fully insured-$2.8M - 465 lives

Health & Benefits portfolio - carriers, brokers and premium across this company's health and benefits plan.

Retirement portfolio analytics

2 plans aggregated / $30.7M assets / 338 participants

Assets by plan

Share of aggregate retirement assets

  • PLAN AND TRUST (#001)$26.9M
  • SYSTEMS UNION 401(K) (#002)$3.8M
Total $30.7MSelect a row to open it

Recordkeeper share

DC plan assets by Schedule C recordkeeper

Entrenched
  • THE VANGUARD GROUP, INC.$26.9M
  • (Not disclosed)$3.8M
Total $30.7MSelect a row to open it

Participants by plan

Active + retired + deferred vested

  • PLAN AND TRUST (#001)197
  • SYSTEMS UNION 401(K) (#002)141
Total 338Select a row to open it

Benefits portfolio analytics

1 plan / $2.8M premiums / 465 covered lives

Coverage by line

Premium dollars by benefit type (bundled lines overlap)

  • Health$2.2M
  • Short-term disability$460K
  • Life$251K
  • Long-term disability$215K
  • Dental$135K
  • Vision$14K
Total $2.8M6 rows
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Plan summaries

Each card links to its plan page. The plan page shows fees vs peers, audit grade, history and counterparties.

Retirement#001

COX ENGINEERING COMPANY 401(K) PLAN AND TRUST

401(k)

Assets$26.9M
Participants197
On the plan page
Fees vs peersAudit gradeAsset trajectoryContributionsSch C providers
Open plan
Retirement#002

CAMBRIDGEPORT AIR SYSTEMS UNION 401(K) PLAN

401(k)

Assets$3.8M
Participants141
On the plan page
Fees vs peersAudit gradeAsset trajectoryContributionsSch C providers
Open plan
Health & Benefits#501

COX ENGINEERING COMPANY WELFARE BENEFITS PLAN

Fully insured - HARVARD PILGRIM HEALTH CARE

Premiums$2.8M
Covered lives465
On the plan page
Premium breakdownCarriersBrokersCoverage stats
Open plan

Retirement plans

2 plans on this EIN

PlanNameTypeAssetsParticipantsLatest year
#001COX ENGINEERING COMPANY 401(K) PLAN AND TRUST401(k)$26.9M1972025
#002CAMBRIDGEPORT AIR SYSTEMS UNION 401(K) PLAN401(k)$3.8M1412025
  • COX ENGINEERING COMPANY 401(K) PLAN AND TRUST$26.9M
    #001 · 401(k) · 2025197
  • CAMBRIDGEPORT AIR SYSTEMS UNION 401(K) PLAN$3.8M
    #002 · 401(k) · 2025141

Health & Benefits plans

1 plan on this EIN

PlanNameFundingCarrierPremiumsCoveredLatest year
#501COX ENGINEERING COMPANY WELFARE BENEFITS PLANFully insuredHARVARD PILGRIM HEALTH CARE$2.8M4652025
  • COX ENGINEERING COMPANY WELFARE BENEFITS PLAN$2.8M
    #501 · Fully insured · HARVARD PILGRIM HEALTH CARE · 2025465
Retirement plans
Health & Benefits plans

On this page

  1. Retirement analytics
  2. Benefits analytics
  3. Plan summaries
  4. Retirement plans
  5. Health & Benefits plans
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