401(k) · DOL Form 5500 · 2024

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

Data updated 2026-08-25

$661M
Total assets Above avg plan size
4,342
Participants Above avg headcount
98th
Percentile by assets National rank
$152,262
Avg per participant Above avg balance/head
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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

$661M in assets, 4,342 participants

Board of Trustees of the Western Wa U.a. Supplemental Pension Plan's Western Washington U.a. Supplemental Pension Plan reported $661M in total assets and 4,342 participants in its 2024 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.

  • #8,828 in Construction (9,039 peers)

Coverage in Washington

Western Washington U.a. Supplemental Pension Plan covers 4,342 participants in Washington, 2.9x the typical Washington plan (state average ~1,476 per filing). Assets: $661M.

#8,828
in Construction (9,039 peers)
+15.2%
assets growth YoY
6.6×
vs typical plan assets (national mean)

Western Washington U.a. Supplemental Pension Plan's outsized position by total assets

Western Washington U.a. Supplemental Pension Plan vs every filed plan by assets

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

$661,120,477 Top 2% higher than 98% 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

Western Washington U.a. Supplemental Pension Plan'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. Western Washington U.a. Supplemental Pension Plan lands in the large band (4,342 participants).

What changed between DOL Form 5500 filings

plan year 2023 → plan year 2024

  • Western Washington U.a. Supplemental Pension Plan reported participants rose from 2,158 in the plan year 2023 filing to 4,342 in the plan year 2024 filing.
  • Western Washington U.a. Supplemental Pension Plan end-of-year assets rose from $574M in the plan year 2023 filing to $661M in the plan year 2024 filing.
  • Western Washington U.a. Supplemental Pension Plan reported net income fell from $100M in the plan year 2023 filing to $88M in the plan year 2024 filing.

See the national 2023→2024 release diff →

EBSA filing schedule strip

Filing strip 911879397 · Board of Trustees of the Western Wa U.a. Supplemental Pension Plan PY 2024 · 401(k)

Western Washington U.a. Supplemental Pension Plan · $661M · 4,342 · 98th

  • PHOTO $661M
  • IND 4,342
  • EOY 98th
  • 5500 401(k)
  • ASSETS near Bj's Wholesale Club, Inc. 401(k) Savings Plan
  • PCT ind #8828

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 Washington →

Western Washington U.a. Supplemental Pension Plan in the asset neighbourhood

Western Washington U.a. Supplemental Pension PlanWestern Washington U.a. Supp…$661MBj's Wholesale Club, Inc. 401(k) Savings PlanBj's Wholesale Club, Inc. 40…$661MLouisiana Health Service & Indemnity Co. Tax-Favored Savings ProgramLouisiana Health Service & I…$661MEllucian Retirement Plan$660MMeijer 401(k) Retirement Plan IIMeijer 401(k) Retirement Pla…$660M
End-of-year total assets ($M) among Western Washington U.a. Supplemental Pension Plan and nearest nationwide 401(k) peers. Source: DOL Form 5500 plan year 2024.

Washington filing particulars

Total Assets (Beginning of Year)$574M
Net Assets (End of Year)$661M
Net Income$88M
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)

Sponsor-wide plan assets over time

All Board of Trustees of the Western Wa U.a. Supplemental Pension Plan plans reported in each filing year

Latest sponsor-wide plan assets
$661M 39.92336217242783% vs 2022
2024 filing year
$400M$500M$600M$700M 202220232024 $472M $661M ▲ +39.9%
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 Scatter plot of 6 data points. -500000050000010000001500000 -20020406080 Total assets ($B) Participants Western Washington U.a. Supplemental Pension Plan, Total assets ($B): 0.661120477 · Participants: 4342Western Washington U.a. Supplemental Pension PlanThe Boeing Company 401(k) Retirement Plan, Total assets ($B): 73.910477714 · Participants: 139394The Boeing Company 401(k) Retirement PlanMicrosoft Corporation Savings Plus 401(k) Plan, Total assets ($B): 65.646011638 · Participants: 118818Microsoft Corporation Savings Plus 401(k) PlanCostco 401(k) Retirement Plan, Total assets ($B): 41.017392708 · Participants: 202468Costco 401(k) Retirement PlanAmazon 401(k) Plan, Total assets ($B): 34.593744657 · Participants: 1209303Amazon 401(k) Plan401(k) Savings Plan, Total assets ($B): 10.074085187 · Participants: 86668401(k) Savings Plan
Western Washington U.a. Supplemental Pension Plan vs. nearby 401(k) plans in Washington, assets vs. participants
Compare Western Washington U.a. Supplemental Pension Plan side-by-side with 3 peers →

Western Washington U.a. Supplemental Pension Plan's out-of-state 401(k) peers by assets and headcount

Outside Washington, the nearest 401(k) by assets is Bj's Wholesale Club, Inc. 401(k) Savings Plan in MA ($661M); by covered participants it is Ctca 401(k) Savings and Retirement Plan in IL (4,338 participants). Same-state nearby plans are listed separately above.

Closest by plan assets

Nearest other-state filings by tot_assets_eoy ($661M here).

Similar participant headcount

Nearest other-state filings by covered participants (4,342 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 Western Washington U.a. Supplemental Pension Plan assets move in 2024? ▼
Western Washington U.a. Supplemental Pension Plan grew sharply - up 15.2% during 2024, from $574M to $661M. Reported net income was $88M.
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 123,622 plans that reported assets for plan year 2024 (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 Bj's Wholesale Club, Inc. 401(k) Savings Plan in MA ($661M, 31,034 participants).
Which 401(k) plans cover a similar participant headcount to Western Washington U.a. Supplemental Pension Plan? ▼
Among 401(k) plans in other states, the closest by covered participants is Ctca 401(k) Savings and Retirement Plan in IL (4,338 participants, $445M 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 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.