401(k) · DOL Form 5500 · 2022

The Middlesex Corporation 401(k) Plan

Data updated 2026-08-25

$87M
Total assets Below avg plan size
868
Participants Near avg headcount
92nd
Percentile by assets National rank
$100,166
Avg per participant Below avg balance/head
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Official DOL plan name: The Middlesex Corporation Retirement Savings Plan · Sponsored by The Middlesex Corporation · Massachusetts · Construction

$87M in assets, 868 participants

The Middlesex Corporation's The Middlesex Corporation Retirement Savings Plan reported $87M in total assets and 868 participants in its 2022 DOL Form 5500 filing, ranking in the 92nd 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.

  • #9,001 in Construction (9,927 peers)

Where The Middlesex Corporation Retirement Savings Plan sits by assets

The Middlesex Corporation Retirement Savings Plan sits in the top 10% of all filed plans by assets, $87M for 868 participants (~$100,166/participant), down 20.2% in 2022.

#9,001
in Construction (9,927 peers)
-20.2%
assets change YoY
0.9×
vs typical plan assets (national mean)

The plan reported a net loss of $22M for the year, a single-year figure driven by markets and benefit payments, not a measure of plan health.

The Middlesex Corporation Retirement Savings Plan's outsized position by total assets

The Middlesex Corporation Retirement Savings Plan vs every filed plan by assets

End-of-year total assets · plan year 2022 · DOL Form 5500

$86,944,368 Top 8% higher than 92% of 139,123 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 2022

The Middlesex Corporation Retirement Savings Plan among mid-size filed plans by headcount

Plan-year 2022 Form 5500 filings with a reported participant count, partitioned by headcount band, not by assets. The Middlesex Corporation Retirement Savings Plan sits mid-pack in the medium band (868 participants).

Plan-year Form 5500 strip

Filing strip 042534615 · The Middlesex Corporation PY 2022 · 401(k)

The Middlesex Corporation Retirement Savings Plan · $87M · 868 · 92nd

  • EIN $87M
  • EIN 868
  • EIN 92nd
  • EIN 401(k)
  • EIN near Hornbeck Offshore Services, Inc. 401(k) Plan
  • EIN ind #9001

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 Construction retirement plans → · Plans in Massachusetts →

The Middlesex Corporation Retirement Savings Plan in the asset neighbourhood

The Middlesex Corporation Retirement Savings PlanThe Middlesex Corporation Re…$87MHornbeck Offshore Services, Inc. 401(k) PlanHornbeck Offshore Services, …$87MPt Holdings, LLC 401(k) Plan$87MDynata, LLC Employee 401(k) PlanDynata, LLC Employee 401(k) …$87MAugusta Health Care Retirement Savings PlanAugusta Health Care Retireme…$87M
End-of-year total assets ($M) among The Middlesex Corporation Retirement Savings Plan and nearest nationwide 401(k) peers. Source: DOL Form 5500 plan year 2022.

Scale-class filing particulars (2022)

Total Assets (Beginning of Year)$109M
Net Assets (End of Year)$87M
Net Income-$22M
Employer EIN042534615
Plan Effective Date1992-10-16
Filing StatusFILING RECEIVED

Sponsor Plan History (The Middlesex Corporation)

Sponsor-wide plan assets over time

All The Middlesex Corporation plans reported in each filing year

Latest sponsor-wide plan assets
$118M 35.60155500814038% vs 2022
2024 filing year
$80M$90M$100M$110M$120M$130M 202220232024 $86.9M $118M ▲ +35.6%
Year Plans Participants Total Assets
2022 1 868 $87M
2023 1 772 $103M
2024 1 821 $118M

Nearby 401(k) Plans in Massachusetts

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

The Middlesex Corporation Retirement Savings Plan vs. nearby 401(k) plans in Massachusetts, assets vs. participants Scatter plot of 6 data points. -200000200004000060000 -100102030 Total assets ($B) Participants The Middlesex Corporation Retirement Savings Plan, Total assets ($B): 0.086944368 · Participants: 868The Middlesex Corporation Retirement Savings PlanFidelity Retirement Savings Plan, Total assets ($B): 22.953563448 · Participants: 52036Fidelity Retirement Savings PlanLiberty Mutual 401(k) Plan, Total assets ($B): 8.79802945 · Participants: 32843Liberty Mutual 401(k) PlanMassachusetts Institute of Technology Supplemental 401(k) Plan, Total assets ($B): 5.810585521 · Participants: 13690Massachusetts Institute of Technology Supplemental 401(k) PlanPhilips North America 401(k) Plan, Total assets ($B): 5.180251859 · Participants: 19750Philips North America 401(k) PlanBoston Scientific Corporation 401(k) Retirement Savings Plan, Total assets ($B): 4.853752256 · Participants: 18359Boston Scientific Corporation 401(k) Retirement Savings Plan
The Middlesex Corporation Retirement Savings Plan vs. nearby 401(k) plans in Massachusetts, assets vs. participants
Compare The Middlesex Corporation Retirement Savings Plan side-by-side with 3 peers →

The Middlesex Corporation Retirement Savings Plan's out-of-state 401(k) peers by assets and headcount

Outside Massachusetts, the nearest 401(k) by assets is Hornbeck Offshore Services, Inc. 401(k) Plan in LA ($87M); by covered participants it is Integrated Employer Solutions 401(k) Plan in UT (868 participants). Same-state nearby plans are listed separately above.

Closest by plan assets

Nearest other-state filings by tot_assets_eoy ($87M here).

Similar participant headcount

Nearest other-state filings by covered participants (868 participants); asset peers above are excluded.

DOL Form 5500 plan year 2022. Asset totals can differ widely at the same headcount; neither axis is a quality rating.

Frequently Asked Questions

How did The Middlesex Corporation Retirement Savings Plan assets move in 2022? ▼
The Middlesex Corporation Retirement Savings Plan declined sharply - down 20.2% during 2022, from $109M to $87M. Reported net income was -$22M.
How have The Middlesex Corporation plan assets changed over time? ▼
Across 3 plan years on file (2022-2024), The Middlesex Corporation's sponsor-wide assets grew 35.6%, from $87M to $118M.
Where does The Middlesex Corporation Retirement Savings Plan rank by assets among Form 5500 filers? ▼
The Middlesex Corporation Retirement Savings Plan ranks in the 92nd percentile by end-of-year assets among 139,126 plans that reported assets for plan year 2022 (in the top 10% of all filed plans by assets).
Which 401(k) plans are similar in size to The Middlesex Corporation Retirement Savings Plan? ▼
Among 401(k) plans in other states, the closest by assets is Hornbeck Offshore Services, Inc. 401(k) Plan in LA ($87M, 624 participants).
Which 401(k) plans cover a similar participant headcount to The Middlesex Corporation Retirement Savings Plan? ▼
Among 401(k) plans in other states, the closest by covered participants is Integrated Employer Solutions 401(k) Plan in UT (868 participants, $9M in assets).

Source: U.S. Department of Labor, Employee Benefits Security Administration (EBSA), Form 5500 public disclosure dataset. Plan year 2022.

Source: DOL EFAST2 filing system (efast.dol.gov) - original filing retrieval by EIN 042534615.

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.