401(k) · DOL Form 5500 · 2024

Trustees of Pipe Fitters Association Local 597 401(k) Plan

Data updated 2026-08-25

$2.5B
Total assets Very large vs avg
9,298
Participants Very large workforce
99th
Percentile by assets National rank
$267,894
Avg per participant High balance/head
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Official DOL plan name: Pipe Fitters Association L.U. 597, U.a. 401(k) Pla · Sponsored by Trustees of Pipe Fitters Association Local 597 · Illinois · Construction

$2.5B in assets, 9,298 participants

Trustees of Pipe Fitters Association Local 597's Pipe Fitters Association L.U. 597, U.a. 401(k) Pla reported $2.5B in total assets and 9,298 participants in its 2024 DOL Form 5500 filing, ranking in the 99th 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.

  • #8,994 in Construction (9,039 peers)

Coverage in Illinois

Pipe Fitters Association L.U. 597, U.a. 401(k) Pla covers 9,298 participants in Illinois, 12x the typical Illinois plan (state average ~779 per filing). Assets: $2.5B.

#8,994
in Construction (9,039 peers)
+15.6%
assets growth YoY
25×
vs typical plan assets (national mean)

Pipe Fitters Association L.U. 597, U.a. 401(k) Pla's outsized position by total assets

Pipe Fitters Association L.U. 597, U.a. 401(k) Pla vs every filed plan by assets

End-of-year total assets · plan year 2024 · DOL Form 5500

$2,490,881,596 Top 1% higher than 99% of 123,620 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 2024

Pipe Fitters Association L.U. 597, U.a. 401(k) Pla's large-plan peer group by participant headcount

Plan-year 2024 Form 5500 filings with a reported participant count, partitioned by headcount band, not by assets. Pipe Fitters Association L.U. 597, U.a. 401(k) Pla lands in the large band (9,298 participants).

What changed between DOL Form 5500 filings

plan year 2023 → plan year 2024

  • Pipe Fitters Association L.U. 597, U.a. 401(k) Pla end-of-year assets rose from $2.2B in the plan year 2023 filing to $2.5B in the plan year 2024 filing.
  • Pipe Fitters Association L.U. 597, U.a. 401(k) Pla reported net income fell from $352M in the plan year 2023 filing to $335M in the plan year 2024 filing.
  • Pipe Fitters Association L.U. 597, U.a. 401(k) Pla reported participants rose from 9,128 in the plan year 2023 filing to 9,298 in the plan year 2024 filing.

See the national 2023→2024 release diff →

Published 5500 schedule card

Filing strip 361820310 · Trustees of Pipe Fitters Association Local 597 PY 2024 · 401(k)

Pipe Fitters Association L.U. 597, U.a. 401(k) Pla · $2.5B · 9,298 · 99th

  • BOOK $2.5B
  • BOOK 9,298
  • BOOK 99th
  • BOOK 401(k)
  • BOOK near Amentum 401(k) Retirement Plan
  • BOOK ind #8994

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 Illinois →

Pipe Fitters Association L.U. 597, U.a. 401(k) Pla in the asset neighbourhood

Pipe Fitters Association L.U. 597, U.a. 401(k) PlaPipe Fitters Association L.U…$2.5BAmentum 401(k) Retirement PlanAmentum 401(k) Retirement Pl…$2.5BTriad 401(k) Retirement Plan$2.5BFinra Savings Plus Plan$2.5BNnpp Contractor Savings Plan$2.5B
End-of-year total assets ($B) among Pipe Fitters Association L.U. 597, U.a. 401(k) Pla and nearest nationwide 401(k) peers. Source: DOL Form 5500 plan year 2024.

Illinois filing particulars

Total Assets (Beginning of Year)$2.2B
Net Assets (End of Year)$2.5B
Net Income$335M
Employer EIN361820310
Plan Effective Date1999-01-01
Filing StatusFILING RECEIVED

Sponsor Plan History (Trustees of Pipe Fitters Association Local 597)

Sponsor-wide plan assets over time

All Trustees of Pipe Fitters Association Local 597 plans reported in each filing year

Latest sponsor-wide plan assets
$2.5B 38.2343266647739% vs 2022
2024 filing year
$1.5B$2B$2.5B$3B 202220232024 $1.8B $2.49B ▲ +38.3%
Year Plans Participants Total Assets
2022 1 9,124 $1.8B
2023 1 9,128 $2.2B
2024 1 9,298 $2.5B

Nearby 401(k) Plans in Illinois

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

Pipe Fitters Association L.U. 597, U.a. 401(k) Pla vs. nearby 401(k) plans in Illinois, assets vs. participants Scatter plot of 6 data points. -50000050000100000150000200000250000 0510152025 Total assets ($B) Participants Pipe Fitters Association L.U. 597, U.a. 401(k) Pla, Total assets ($B): 2.490881596 · Participants: 9298Pipe Fitters Association L.U. 597, U.a. 401(k) PlaAccenture United States 401(k) Match and Savings Plan, Total assets ($B): 21.302643276 · Participants: 66965Accenture United States 401(k) Match and Savings PlanState Farm 401(k) Savings Plan, Total assets ($B): 19.010099056 · Participants: 63297State Farm 401(k) Savings PlanUnited Airlines Pilot Retirement Account Plan, Total assets ($B): 16.835964452 · Participants: 16659United Airlines Pilot Retirement Account PlanAbbott Laboratories Stock Retirement Plan, Total assets ($B): 15.755668 · Participants: 38229Abbott Laboratories Stock Retirement PlanWalgreens Retirement Savings Plan, Total assets ($B): 14.535873337 · Participants: 233635Walgreens Retirement Savings Plan
Pipe Fitters Association L.U. 597, U.a. 401(k) Pla vs. nearby 401(k) plans in Illinois, assets vs. participants
Compare Pipe Fitters Association L.U. 597, U.a. 401(k) Pla side-by-side with 3 peers →

Scale composition for Pipe Fitters Association L.U. 597, U.a. 401(k) Pla

Pipe Fitters Association L.U. 597, U.a. 401(k) Pla reports $2.5B in end-of-year assets across 9,298 participants (0.020% of the $12.3T held by all Form 5500 filers in the national rollup , and 0.010% of 93,925,755 covered participants) - about $267,894 per participant (1.9x the national average assets-per-participant) . Net income for plan year 2024 was $335M.

This plan identity (EIN 361820310, plan #002) has 3 Form 5500 filings on file from 2022 to 2024 , with end-of-year assets moving from $1.8B to $2.5B (+38.2%) while covered participants moved from 9,124 to 9,298 . Single-year sparse filers cannot show that trail.

Plan year Participants EOY assets Filing
2022 9,124 $1.8B Open filing
2023 9,128 $2.2B Open filing
2024 · index core 9,298 $2.5B This page

Pipe Fitters Association L.U. 597, U.a. 401(k) Pla's out-of-state 401(k) peers by assets and headcount

Outside Illinois, the nearest 401(k) by assets is Amentum 401(k) Retirement Plan in VA ($2.5B); by covered participants it is The Savannah River Nuclear Solutions, LLC Defined Contribution Plan in SC (9,296 participants). Same-state nearby plans are listed separately above.

Closest by plan assets

Nearest other-state filings by tot_assets_eoy ($2.5B here).

Similar participant headcount

Nearest other-state filings by covered participants (9,298 participants); asset peers above are excluded.

DOL Form 5500 plan year 2024. Asset totals can differ widely at the same headcount; neither axis is a quality rating.

Frequently Asked Questions

How did Pipe Fitters Association L.U. 597, U.a. 401(k) Pla assets move in 2024? ▼
Pipe Fitters Association L.U. 597, U.a. 401(k) Pla grew sharply - up 15.6% during 2024, from $2.2B to $2.5B. Reported net income was $335M.
How have Trustees of Pipe Fitters Association Local 597 plan assets changed over time? ▼
Across 3 plan years on file (2022-2024), Trustees of Pipe Fitters Association Local 597's sponsor-wide assets grew 38.2%, from $1.8B to $2.5B.
Where does Pipe Fitters Association L.U. 597, U.a. 401(k) Pla rank by assets among Form 5500 filers? ▼
Pipe Fitters Association L.U. 597, U.a. 401(k) Pla ranks in the 99th percentile by end-of-year assets among 123,622 plans that reported assets for plan year 2024 (among the largest 1% of all filed plans).
Which 401(k) plans are similar in size to Pipe Fitters Association L.U. 597, U.a. 401(k) Pla? ▼
Among 401(k) plans in other states, the closest by assets is Amentum 401(k) Retirement Plan in VA ($2.5B, 31,017 participants).
Which 401(k) plans cover a similar participant headcount to Pipe Fitters Association L.U. 597, U.a. 401(k) Pla? ▼
Among 401(k) plans in other states, the closest by covered participants is The Savannah River Nuclear Solutions, LLC Defined Contribution Plan in SC (9,296 participants, $2.8B in assets).

Source: U.S. Department of Labor, Employee Benefits Security Administration (EBSA), Form 5500 public disclosure dataset. Plan year 2024.

Source: DOL EFAST2 filing system (efast.dol.gov) - original filing retrieval by EIN 361820310.

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.