401(k) · DOL Form 5500 · 2023
The Middlesex Corporation 401(k) Plan
Data updated 2026-08-25
- $103M
- Total assets Near avg plan size
- 772
- Participants Near avg headcount
- 91st
- Percentile by assets National rank
- $132,974
- Avg per participant Near avg balance/head
Official DOL plan name: Middlesex Corporation Retirement Savings Plan · Sponsored by The Middlesex Corporation · Massachusetts · Construction
$103M in assets, 772 participants
The Middlesex Corporation's Middlesex Corporation Retirement Savings Plan reported $103M in total assets and 772 participants in its 2023 DOL Form 5500 filing, ranking in the 91st 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.
- #8,105 in Construction (9,030 peers)
Where Middlesex Corporation Retirement Savings Plan sits by assets
Middlesex Corporation Retirement Savings Plan sits in the top 10% of all filed plans by assets, $103M for 772 participants (~$132,974/participant), up 18.1% in 2023.
- #8,105
- in Construction (9,030 peers)
- +18.1%
- assets growth YoY
- 1.0×
- vs typical plan assets (national mean)
Middlesex Corporation Retirement Savings Plan's outsized position by total assets
Middlesex Corporation Retirement Savings Plan vs every filed plan by assets
End-of-year total assets · plan year 2023 · DOL Form 5500
$102,656,093 Top 9% higher than 91% of 127,068 filed plans
Dashed line + filled bar = this entry, among filed plans.
Source U.S. Department of Labor Form 5500 filings (EBSA) · plan year 2023
Middlesex Corporation Retirement Savings Plan among mid-size filed plans by headcount
Plan-year 2023 Form 5500 filings with a reported participant count, partitioned by headcount band, not by assets. Middlesex Corporation Retirement Savings Plan sits mid-pack in the medium band (772 participants).
What changed between DOL Form 5500 filings
plan year 2022 → plan year 2023
- Middlesex Corporation Retirement Savings Plan reported net income rose from -$22M in the plan year 2022 filing to $16M in the plan year 2023 filing.
- Middlesex Corporation Retirement Savings Plan end-of-year assets rose from $87M in the plan year 2022 filing to $103M in the plan year 2023 filing.
- Middlesex Corporation Retirement Savings Plan reported participants fell from 868 in the plan year 2022 filing to 772 in the plan year 2023 filing.
DOL schedule card
Filing strip 042534615 · The Middlesex Corporation PY 2023 · 401(k)
Middlesex Corporation Retirement Savings Plan · $103M · 772 · 91st
- PCT $103M
- PCT 772
- PCT 91st
- PCT 401(k)
- PCT near Isec, Inc. 401(k) Savings Plan
- PCT ind #8105
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 →
Middlesex Corporation Retirement Savings Plan in the asset neighbourhood
Scale-class filing particulars (2023)
| Total Assets (Beginning of Year) | $87M |
|---|---|
| Net Assets (End of Year) | $103M |
| Net Income | $16M |
| Employer EIN | 042534615 |
| Plan Effective Date | 1992-10-16 |
| Filing Status | FILING 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
| 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.
- Fidelity Retirement Savings Plan $28.6B · 62,289
- Liberty Mutual 401(k) Plan $10.6B · 37,052
- Massachusetts Institute of Technology Supplemental 401(k) Plan $6.8B · 14,094
- Boston Scientific Corporation 401(k) Retirement Savings Plan $5.8B · 19,881
- Philips North America 401(k) Plan $5.8B · 19,120
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 Isec, Inc. 401(k) Savings Plan in CO ($103M); by covered participants it is Associated Terminals, L.L.C. 401(k) Plan in LA (772 participants). Same-state nearby plans are listed separately above.
Closest by plan assets
Nearest other-state filings by tot_assets_eoy ($103M here).
- Isec, Inc. 401(k) Savings Plan (CO) $103M · 832
- Pension Plan for the Local Union No. 131 International Brotherhood of Electrical Wrkrs (MI) $103M · 975
- Kroenke Sports 401(k) Savings Plan (CO) $103M · 2,413
- Shutterstock, Inc. 401(k) Plan (NY) $103M · 686
Similar participant headcount
Nearest other-state filings by covered participants (772 participants); asset peers above are excluded.
- Associated Terminals, L.L.C. 401(k) Plan (LA) 772 · 0 off
- Tumi, Inc. Profit Sharing/401(k) Plan (NJ) 772 · 0 off
- Goodwill Industries-Manasota, Inc. Retirement Plan (FL) 772 · 0 off
- The Maschhoffs 401(k) Plan (IL) 772 · 0 off
DOL Form 5500 plan year 2023. Asset totals can differ widely at the same headcount; neither axis is a quality rating.