401(k) · DOL Form 5500 · 2023

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

Data updated 2026-08-11

$2.2B
Total assets: 9,128
Participants: 99th
Percentile by assets: $235,957
Avg per participant

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

$2.2B in assets, 9,128 participants

Trustees of Pipe Fitters Association Local 597's Pipe Fitters Association L.U. 597, U.a. 401(k) Pla reported $2.2B in total assets and 9,128 participants in its 2023 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.

99th percentile by assets (of 127,072 plans)
#8,982 in Construction (9,030 peers)

Coverage in Illinois

Pipe Fitters Association L.U. 597, U.a. 401(k) Pla covers 9,128 participants in Illinois, 12x the typical Illinois plan (state average ~779 per filing). Assets: $2.2B.

$2.2B
total plan assets (2023 EOY): 9,128
covered participants: 99th
percentile by assets (of 127,072 plans): $235,957
avg assets per participant

Pipe Fitters Association L.U. 597, U.a. 401(k) Pla reported net income rose from -$192M in the plan year 2022 filing to $352M in the plan year 2023 filing.
Pipe Fitters Association L.U. 597, U.a. 401(k) Pla end-of-year assets rose from $1.8B in the plan year 2022 filing to $2.2B in the plan year 2023 filing.

See the national 2023→2024 release diff →

State

Illinois

Industry

Construction

Participants vs Illinois filers

In Illinois, the average filing covers about 779 participants across 5,745 plans. Pipe Fitters Association L.U. 597, U.a. 401(k) Pla reports 9,128 participants - 12x that state average ($2.2B EOY assets).

Illinois filing particulars

Total Assets (Beginning of Year)	$1.8B
Net Assets (End of Year)	$2.2B
Net Income	$352M
Employer EIN	361820310
Plan Effective Date	1999-01-01
Filing Status	FILING RECEIVED

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

Total plan assets by year, all Trustees of Pipe Fitters Association Local 597 plans on file

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

Accenture United States 401(k) Match Savings Plan $17.6B · 69,974
State Farm 401(k) Savings Plan $16.9B · 60,246
Abbott Laboratories Stock Retirement Plan $14.5B · 38,012
United Airlines Pilot Retirement Account Plan $14.4B · 14,959
Walgreens Retirement Savings Plan $13.4B · 235,331

Compare Pipe Fitters Association L.U. 597, U.a. … 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 $2.2B in end-of-year assets across 9,128 participants (0.017% of the $12.3T held by all Form 5500 filers in the national rollup , and 0.010% of 93,925,755 covered participants) - about $235,957 per participant (1.7x the national average assets-per-participant) . Net income for plan year 2023 was $352M.

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	This page
2024 · index core	9,298	$2.5B	Open filing

The same sponsor also keeps 1 other index-core plan on PlainRetire:

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

Similar-Sized 401(k) Plans Nationally

401(k) plans in other states closest to Pipe Fitters Association L.U. 597, U.a. 401(k) Pla by total assets, not by location.

Alaska Airlines, Inc. Pilots Investment and Savings Plan (WA) $2.2B · 3,333
Unum Group 401(k) Retirement Plan (ME) $2.2B · 9,604
Agilent Technologies, Inc. 401(k) Plan (CA) $2.2B · 6,437
Teva Pharmaceuticals Retirement Savings Plan (NJ) $2.1B · 5,360

Frequently Asked Questions

How did Pipe Fitters Association L.U. 597, U.a. 401(k) Pla assets move in 2023? ▼

Pipe Fitters Association L.U. 597, U.a. 401(k) Pla grew sharply - up 19.5% during 2023, from $1.8B to $2.2B. Reported net income was $352M.

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 127,072 plans that reported assets for plan year 2023 (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 Alaska Airlines, Inc. Pilots Investment and Savings Plan in WA ($2.2B, 3,333 participants).

Next read for Pipe Fitters Association L.U. 597, U.a. …

Filing takeaways

Ways to act on Pipe Fitters Association L.U. 597, U.a. 401(k) Pla's numbers.

By total assets, Pipe Fitters Association L.U. 597, U.a. 401(k) Pla ranks among the largest 1% of all filed plans. See the largest plans
Compare it side-by-side against 3 similar 401(k) plans in Illinois. Compare plans
Trustees of Pipe Fitters Association Local 597's sponsor-wide assets have grown 38.2% 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 361820310.