401(k) · DOL Form 5500 · 2022

Board of Trustees of the Western Wa U.a. Supplemental Pension Plan 401(k) Plan

Data updated 2026-08-11

$472M
Total assets
5,114
Participants
98th
Percentile by assets
$92,391
Avg per participant
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Official DOL plan name: Western Washington U.a. Supplemental Pension Plan · Sponsored by Board of Trustees of the Western Wa U.a. Supplemental Pension Plan · Washington · Construction

$472M in assets, 5,114 participants

Board of Trustees of the Western Wa U.a. Supplemental Pension Plan's Western Washington U.a. Supplemental Pension Plan reported $472M in total assets and 5,114 participants in its 2022 DOL Form 5500 filing, ranking in the 98th 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.

  • 98th percentile by assets (of 139,126 plans)
  • #9,692 in Construction (9,927 peers)

Coverage in Washington

Western Washington U.a. Supplemental Pension Plan covers 5,114 participants in Washington, 3.5x the typical Washington plan (state average ~1,476 per filing). Assets: $472M.

$472M
total plan assets (2022 EOY)
5,114
covered participants
98th
percentile by assets (of 139,126 plans)
$92,391
avg assets per participant

The plan reported a net loss of $84M for the year, a single-year figure driven by markets and benefit payments, not a measure of plan health.

State
Washington
Industry
Construction

Participants vs Washington filers

In Washington, the average filing covers about 1,476 participants across 2,612 plans. Western Washington U.a. Supplemental Pension Plan reports 5,114 participants - 3.5x that state average ($472M EOY assets).

Washington filing particulars

Total Assets (Beginning of Year)$559M
Net Assets (End of Year)$472M
Net Income-$84M
Employer EIN911879397
Plan Effective Date1998-01-01
Filing StatusFILING RECEIVED

Sponsor Plan History (Board of Trustees of the Western Wa U.a. Supplemental Pension Plan)

$400M$500M$600M$700M 202220232024 $472M $661M ▲ +39.9%
Total plan assets by year, all Board of Trustees of the Western Wa U.a. Supplemental Pension Plan plans on file
Year Plans Participants Total Assets
2022 1 5,114 $472M
2023 1 2,158 $574M
2024 1 4,342 $661M

Nearby 401(k) Plans in Washington

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

Western Washington U.a. Supplemental Pension Plan vs. nearby 401(k) plans in Washington, assets vs. participants

Western Washington U.a. Supplemental Pension Plan vs. nearby 401(k) plans in Washington, assets vs. participants Scatter plot of 6 data points. -500000050000010000001500000 -20020406080 Total assets ($B) Participants Western Washington U…The Boeing Company 4…Microsoft Corporatio…Costco 401(k) Retire…Amazon 401(k) PlanT-Mobile USA, Inc. 4…
Western Washington U.a. Supplemental Pension Plan vs. nearby 401(k) plans in Washington, assets vs. participants
Compare Western Washington U.a. Supplemental Pen… side-by-side with 3 peers →

Scale composition for Western Washington U.a. Supplemental Pension Plan

Western Washington U.a. Supplemental Pension Plan reports $472M in end-of-year assets across 5,114 participants (0.004% of the $12.3T held by all Form 5500 filers in the national rollup , and 0.005% of 93,925,755 covered participants) - about $92,391 per participant (67% of the national average assets-per-participant) . Net income for plan year 2022 was -$84M.

This plan identity (EIN 911879397, plan #001) has 3 Form 5500 filings on file from 2022 to 2024 , with end-of-year assets moving from $472M to $661M (+39.9%) while covered participants moved from 5,114 to 4,342 . Single-year sparse filers cannot show that trail.

Plan year Participants EOY assets Filing
2022 5,114 $472M This page
2023 2,158 $574M Open filing
2024 · index core 4,342 $661M Open filing

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

Similar-Sized 401(k) Plans Nationally

401(k) plans in other states closest to Western Washington U.a. Supplemental Pension Plan by total assets, not by location.

Frequently Asked Questions

How did Western Washington U.a. Supplemental Pension Plan assets move in 2022? ▼
Western Washington U.a. Supplemental Pension Plan declined sharply - down 15.4% during 2022, from $559M to $472M. Reported net income was -$84M.
How have Board of Trustees of the Western Wa U.a. Supplemental Pension Plan plan assets changed over time? ▼
Across 3 plan years on file (2022-2024), Board of Trustees of the Western Wa U.a. Supplemental Pension Plan's sponsor-wide assets grew 39.9%, from $472M to $661M.
Where does Western Washington U.a. Supplemental Pension Plan rank by assets among Form 5500 filers? ▼
Western Washington U.a. Supplemental Pension Plan ranks in the 98th percentile by end-of-year assets among 139,126 plans that reported assets for plan year 2022 (in the top 5% of all filed plans by assets).
Which 401(k) plans are similar in size to Western Washington U.a. Supplemental Pension Plan? ▼
Among 401(k) plans in other states, the closest by assets is Schreiber Foods, Inc. 401(k) Retirement Savings Plan in WI ($473M, 6,029 participants).

Next read for Western Washington U.a. Supplemental Pen…

Filing takeaways

Ways to act on Western Washington U.a. Supplemental Pension Plan's numbers.

  • By total assets, Western Washington U.a. Supplemental Pension 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 Washington. Compare plans
  • Board of Trustees of the Western Wa U.a. Supplemental Pension Plan's sponsor-wide assets have grown 39.9% 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 2022.

Source: DOL EFAST2 filing system (efast.dol.gov) - original filing retrieval by EIN 911879397.

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.