401(k) · DOL Form 5500 · 2024

Seattle-Tacoma Box Company 401(k) Plan

Data updated 2026-08-25

$23M
Total assets Small plan by assets
217
Participants Below avg headcount
72nd
Percentile by assets National rank
$103,921
Avg per participant Below avg balance/head
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Official DOL plan name: Stb Retirement Savings Plan · Sponsored by Seattle-Tacoma Box Company · Washington · Professional & Technical Services

$23M in assets, 217 participants

Seattle-Tacoma Box Company's Stb Retirement Savings Plan reported $23M in total assets and 217 participants in its 2024 DOL Form 5500 filing, ranking in the 72nd 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.

  • #14,536 in Professional & Technical Services (20,173 peers)

Coverage in Washington

Stb Retirement Savings Plan covers 217 participants in Washington, about 15% of the average Washington filer (state average ~1,476 per filing). Assets: $23M.

#14,536
in Professional & Technical Services (20,173 peers)
+17.2%
assets growth YoY

Stb Retirement Savings Plan's outsized position by total assets

Stb Retirement Savings Plan vs every filed plan by assets

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

$22,550,820 Top 28% higher than 72% 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

Stb Retirement Savings Plan among mid-size filed plans by headcount

Plan-year 2024 Form 5500 filings with a reported participant count, partitioned by headcount band, not by assets. Stb Retirement Savings Plan sits mid-pack in the medium band (217 participants).

What changed between DOL Form 5500 filings

plan year 2023 → plan year 2024

  • Stb Retirement Savings Plan reported net income fell from $4M in the plan year 2023 filing to $3M in the plan year 2024 filing.
  • Stb Retirement Savings Plan end-of-year assets rose from $19M in the plan year 2023 filing to $23M in the plan year 2024 filing.
  • Stb Retirement Savings Plan reported participants rose from 205 in the plan year 2023 filing to 217 in the plan year 2024 filing.

See the national 2023→2024 release diff →

EBSA filing schedule strip

Filing strip 910402210 · Seattle-Tacoma Box Company PY 2024 · 401(k)

Stb Retirement Savings Plan · $23M · 217 · 72nd

  • TYPE $23M
  • NET 217
  • BOOK 72nd
  • VS-ST 401(k)
  • BOY near Mazuma Credit Union 401(k) Success Sharing Plan
  • SCH ind #14536

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 Professional & Technical Services retirement plans → · Plans in Washington →

Stb Retirement Savings Plan in the asset neighbourhood

Stb Retirement Savings Plan$23MMazuma Credit Union 401(k) Success Sharing PlanMazuma Credit Union 401(k) S…$23MPrestolite Retirement Savings PlanPrestolite Retirement Saving…$23MCalifornia Bank of Commerce Profit Sharing 401(k) PlanCalifornia Bank of Commerce …$23MThe Honest Company, Inc. 401(k) Profit Sharing PlanThe Honest Company, Inc. 401…$23M
End-of-year total assets ($M) among Stb Retirement Savings Plan and nearest nationwide 401(k) peers. Source: DOL Form 5500 plan year 2024.

Washington filing particulars

Total Assets (Beginning of Year)$19M
Net Assets (End of Year)$23M
Net Income$3M
Employer EIN910402210
Plan Effective Date2004-01-01
Filing StatusFILING RECEIVED

Sponsor Plan History (Seattle-Tacoma Box Company)

Sponsor-wide plan assets over time

All Seattle-Tacoma Box Company plans reported in each filing year

Latest sponsor-wide plan assets
$23M 50.919053577193594% vs 2022
2024 filing year
$10M$15M$20M$25M 202220232024 $14.9M $22.6M ▲ +50.9%
Year Plans Participants Total Assets
2022 1 276 $15M
2023 1 205 $19M
2024 1 217 $23M

Nearby 401(k) Plans in Washington

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

Stb Retirement Savings Plan vs. nearby 401(k) plans in Washington, assets vs. participants Scatter plot of 6 data points. -500000050000010000001500000 -20020406080 Total assets ($B) Participants Stb Retirement Savings Plan, Total assets ($B): 0.02255082 · Participants: 217Stb Retirement Savings 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
Stb Retirement Savings Plan vs. nearby 401(k) plans in Washington, assets vs. participants
Compare Stb Retirement Savings Plan side-by-side with 3 peers →

Stb Retirement Savings Plan's out-of-state 401(k) peers by assets and headcount

Outside Washington, the nearest 401(k) by assets is Mazuma Credit Union 401(k) Success Sharing Plan in KS ($23M); by covered participants it is Bell Pump Service Company, Inc. 401(k) Profit Sharing Plan in CT (217 participants). Same-state nearby plans are listed separately above.

Similar participant headcount

Nearest other-state filings by covered participants (217 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 Stb Retirement Savings Plan assets move in 2024? ▼
Stb Retirement Savings Plan grew sharply - up 17.2% during 2024, from $19M to $23M. Reported net income was $3M.
How have Seattle-Tacoma Box Company plan assets changed over time? ▼
Across 3 plan years on file (2022-2024), Seattle-Tacoma Box Company's sponsor-wide assets grew 50.9%, from $15M to $23M.
Which 401(k) plans are similar in size to Stb Retirement Savings Plan? ▼
Among 401(k) plans in other states, the closest by assets is Mazuma Credit Union 401(k) Success Sharing Plan in KS ($23M, 247 participants).
Which 401(k) plans cover a similar participant headcount to Stb Retirement Savings Plan? ▼
Among 401(k) plans in other states, the closest by covered participants is Bell Pump Service Company, Inc. 401(k) Profit Sharing Plan in CT (217 participants, N/A 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 910402210.

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.