401(k) · DOL Form 5500 · 2023

Suffolk Construction Company, Inc. 401(k) Plan

Data updated 2026-08-11

$280M
Total assets: 1,826
Participants: 96th
Percentile by assets: $153,338
Avg per participant

Official DOL plan name: Suffolk Construction Company, Inc. 401(k) Retirement Plan · Sponsored by Suffolk Construction Company, Inc. · Massachusetts · Construction

$280M in assets, 1,826 participants

Suffolk Construction Company, Inc.'s Suffolk Construction Company, Inc. 401(k) Retirement Plan reported $280M in total assets and 1,826 participants in its 2023 DOL Form 5500 filing, ranking in the 96th 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.

96th percentile by assets (of 127,072 plans)
#8,592 in Construction (9,030 peers)

Coverage in Massachusetts

Suffolk Construction Company, Inc. 401(k) Retirement Plan covers 1,826 participants in Massachusetts, 2.8x the typical Massachusetts plan (state average ~659 per filing). Assets: $280M.

$280M
total plan assets (2023 EOY): 1,826
covered participants: 96th
percentile by assets (of 127,072 plans): $153,338
avg assets per participant

Where Suffolk Construction Company, Inc. 401(k) Retirement Plan sits by total assets

Suffolk Construction Company, Inc. 401(k) Retirement Plan vs every filed plan by assets

End-of-year total assets · plan year 2023 · DOL Form 5500

$279,995,066 Top 4% higher than 96% 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

Suffolk Construction Company, Inc. 401(k) Retirement Plan reported net income rose from -$44M in the plan year 2022 filing to $44M in the plan year 2023 filing.
Suffolk Construction Company, Inc. 401(k) Retirement Plan end-of-year assets rose from $236M in the plan year 2022 filing to $280M in the plan year 2023 filing.
Suffolk Construction Company, Inc. 401(k) Retirement Plan reported participants rose from 1,687 in the plan year 2022 filing to 1,826 in the plan year 2023 filing.

See the national 2022→2023 release diff →

State

Massachusetts

Industry

Construction

Participants vs Massachusetts filers

In Massachusetts, the average filing covers about 659 participants across 4,265 plans. Suffolk Construction Company, Inc. 401(k) Retirement Plan reports 1,826 participants - 2.8x that state average ($280M EOY assets).

Massachusetts filing particulars

Total Assets (Beginning of Year)	$236M
Net Assets (End of Year)	$280M
Net Income	$44M
Employer EIN	042776356
Plan Effective Date	1993-01-01
Filing Status	FILING RECEIVED

Sponsor Plan History (Suffolk Construction Company, Inc.)

Total plan assets by year, all Suffolk Construction Company, Inc. plans on file

Year	Plans	Participants	Total Assets
2022	1	1,687	$236M
2023	1	1,826	$280M
2024	1	1,935	$336M

Nearby 401(k) Plans in Massachusetts

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

Suffolk Construction Company, Inc. 401(k) Retirement Plan vs. nearby 401(k) plans in Massachusetts, assets vs. participants

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

Compare Suffolk Construction Company, Inc. 401(k… side-by-side with 3 peers →

Similar-Sized 401(k) Plans Nationally

401(k) plans in other states closest to Suffolk Construction Company, Inc. 401(k) Retirement Plan by total assets, not by location.

Hyundai Motor Manufacturing Alabama, LLC 401(k) Plan (AL) $280M · 3,738
Stillwater Mining Company Bargaining Unit 401(k) Plan (MT) $280M · 1,324
St. Jude Heritage Medical Group 401(k) Profit Sharing Plan (CA) $280M · 349
Allen Matkins Profit Sharing and 401(k) Plan (CA) $280M · 365

Frequently Asked Questions

How did Suffolk Construction Company, Inc. 401(k) Retirement Plan assets move in 2023? ▼

Suffolk Construction Company, Inc. 401(k) Retirement Plan grew sharply - up 18.9% during 2023, from $236M to $280M. Reported net income was $44M.

How have Suffolk Construction Company, Inc. plan assets changed over time? ▼

Across 3 plan years on file (2022-2024), Suffolk Construction Company, Inc.'s sponsor-wide assets grew 42.8%, from $236M to $336M.

Where does Suffolk Construction Company, Inc. 401(k) Retirement Plan rank by assets among Form 5500 filers? ▼

Suffolk Construction Company, Inc. 401(k) Retirement Plan ranks in the 96th percentile by end-of-year assets among 127,072 plans that reported assets for plan year 2023 (in the top 5% of all filed plans by assets).

Which 401(k) plans are similar in size to Suffolk Construction Company, Inc. 401(k) Retirement Plan? ▼

Among 401(k) plans in other states, the closest by assets is Hyundai Motor Manufacturing Alabama, LLC 401(k) Plan in AL ($280M, 3,738 participants).

Next read for Suffolk Construction Company, Inc. 401(k…

Filing takeaways

Ways to act on Suffolk Construction Company, Inc. 401(k) Retirement Plan's numbers.

By total assets, Suffolk Construction Company, Inc. 401(k) Retirement Plan ranks in the top 5% of all filed plans by assets. See the largest plans
Compare it side-by-side against 3 similar 401(k) plans in Massachusetts. Compare plans
Suffolk Construction Company, Inc.'s sponsor-wide assets have grown 42.8% since 2022 across 3 plan years on file. More Construction plans

Source: U.S. Department of Labor, Employee Benefits Security Administration (EBSA), Form 5500 public disclosure dataset. Plan year 2023.

Source: DOL EFAST2 filing system (efast.dol.gov) - original filing retrieval by EIN 042776356.