401(k) · DOL Form 5500 · 2023

Suffolk Construction Company, Inc. 401(k) Plan

Data updated 2026-08-25

$280M
Total assets Near avg plan size
1,826
Participants Near avg headcount
96th
Percentile by assets National rank
$153,338
Avg per participant Above avg balance/head
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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.

  • #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.

#8,592
in Construction (9,030 peers)
+18.9%
assets growth YoY
2.8×
vs typical plan assets (national mean)

Suffolk Construction Company, Inc. 401(k) Retirement Plan's outsized position 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

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 2023

Suffolk Construction Company, Inc. 401(k) Retirement Plan's large-plan peer group by participant headcount

Plan-year 2023 Form 5500 filings with a reported participant count, partitioned by headcount band, not by assets. Suffolk Construction Company, Inc. 401(k) Retirement Plan lands in the large band (1,826 participants).

What changed between DOL Form 5500 filings

plan year 2022 → 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 →

EBSA filing schedule strip

Filing strip 042776356 · Suffolk Construction Company, Inc. PY 2023 · 401(k)

Suffolk Construction Company, Inc. 401(k) Retirement Plan · $280M · 1,826 · 96th

  • EBSA $280M
  • EBSA 1,826
  • EBSA 96th
  • EBSA 401(k)
  • EBSA near Hyundai Motor Manufacturing Alabama, LLC 401(k) Plan
  • EBSA ind #8592

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 →

Suffolk Construction Company, Inc. 401(k) Retirement Plan in the asset neighbourhood

St. Jude Heritage Medical Group 401(k) Profit Sharing PlanSt. Jude Heritage Medical Gr…$280MHyundai Motor Manufacturing Alabama, LLC 401(k) PlanHyundai Motor Manufacturing …$280MSuffolk Construction Company, Inc. 401(k) Retirement PlanSuffolk Construction Company…$280MStillwater Mining Company Bargaining Unit 401(k) PlanStillwater Mining Company Ba…$280MAllen Matkins Profit Sharing and 401(k) PlanAllen Matkins Profit Sharing…$280M
End-of-year total assets ($M) among Suffolk Construction Company, Inc. 401(k) Retirement Plan and nearest nationwide 401(k) peers. Source: DOL Form 5500 plan year 2023.

Massachusetts filing particulars

Total Assets (Beginning of Year)$236M
Net Assets (End of Year)$280M
Net Income$44M
Employer EIN042776356
Plan Effective Date1993-01-01
Filing StatusFILING RECEIVED

Sponsor Plan History (Suffolk Construction Company, Inc.)

Sponsor-wide plan assets over time

All Suffolk Construction Company, Inc. plans reported in each filing year

Latest sponsor-wide plan assets
$336M 42.8014756998374% vs 2022
2024 filing year
$200M$250M$300M$350M 202220232024 $236M $336M ▲ +42.8%
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 Scatter plot of 6 data points. -20000020000400006000080000 -10010203040 Total assets ($B) Participants Suffolk Construction Company, Inc. 401(k) Retirement Plan, Total assets ($B): 0.279995066 · Participants: 1826Suffolk Construction Company, Inc. 401(k) Retirement PlanFidelity Retirement Savings Plan, Total assets ($B): 28.649852331 · Participants: 62289Fidelity Retirement Savings PlanLiberty Mutual 401(k) Plan, Total assets ($B): 10.556596852 · Participants: 37052Liberty Mutual 401(k) PlanMassachusetts Institute of Technology Supplemental 401(k) Plan, Total assets ($B): 6.829912863 · Participants: 14094Massachusetts Institute of Technology Supplemental 401(k) PlanBoston Scientific Corporation 401(k) Retirement Savings Plan, Total assets ($B): 5.786107181 · Participants: 19881Boston Scientific Corporation 401(k) Retirement Savings PlanPhilips North America 401(k) Plan, Total assets ($B): 5.779286156 · Participants: 19120Philips North America 401(k) Plan
Suffolk Construction Company, Inc. 401(k) Retirement Plan vs. nearby 401(k) plans in Massachusetts, assets vs. participants
Compare Suffolk Construction Company, Inc. 401(k) Retirement Plan side-by-side with 3 peers →

Suffolk Construction Company, Inc. 401(k) Retirement Plan's out-of-state 401(k) peers by assets and headcount

Outside Massachusetts, the nearest 401(k) by assets is Hyundai Motor Manufacturing Alabama, LLC 401(k) Plan in AL ($280M); by covered participants it is Gci 401(k) Plan in AK (1,826 participants). Same-state nearby plans are listed separately above.

Similar participant headcount

Nearest other-state filings by covered participants (1,826 participants); asset peers above are excluded.

DOL Form 5500 plan year 2023. Asset totals can differ widely at the same headcount; neither axis is a quality rating.

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).
Which 401(k) plans cover a similar participant headcount to Suffolk Construction Company, Inc. 401(k) Retirement Plan? ▼
Among 401(k) plans in other states, the closest by covered participants is Gci 401(k) Plan in AK (1,826 participants, $402M in assets).

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.

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.