401(k) · DOL Form 5500 · 2023

The Baseball Club of Seattle, Lllp 401(k) Plan

Data updated 2026-08-25

$59M
Total assets Below avg plan size
468
Participants Below avg headcount
87th
Percentile by assets National rank
$127,136
Avg per participant Near avg balance/head
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Official DOL plan name: The Seattle Mariners 401(k) Plan · Sponsored by The Baseball Club of Seattle, Lllp · Washington · Arts, Entertainment & Recreation

$59M in assets, 468 participants

The Baseball Club of Seattle, Lllp's The Seattle Mariners 401(k) Plan reported $59M in total assets and 468 participants in its 2023 DOL Form 5500 filing, ranking in the 87th 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.

  • #2,735 in Arts, Entertainment & Recreation (2,945 peers)

Coverage in Washington

The Seattle Mariners 401(k) Plan covers 468 participants in Washington, about 32% of the average Washington filer (state average ~1,476 per filing). Assets: $59M.

#2,735
in Arts, Entertainment & Recreation (2,945 peers)
+27.7%
assets growth YoY
0.6×
vs typical plan assets (national mean)

The Seattle Mariners 401(k) Plan's outsized position by total assets

The Seattle Mariners 401(k) Plan vs every filed plan by assets

End-of-year total assets · plan year 2023 · DOL Form 5500

$59,499,438 Top 13% higher than 87% of 127,068 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 2023

The Seattle Mariners 401(k) Plan among mid-size filed plans by headcount

Plan-year 2023 Form 5500 filings with a reported participant count, partitioned by headcount band, not by assets. The Seattle Mariners 401(k) Plan sits mid-pack in the medium band (468 participants).

What changed between DOL Form 5500 filings

plan year 2022 → plan year 2023

  • The Seattle Mariners 401(k) Plan reported net income rose from -$7M in the plan year 2022 filing to $13M in the plan year 2023 filing.
  • The Seattle Mariners 401(k) Plan end-of-year assets rose from $47M in the plan year 2022 filing to $59M in the plan year 2023 filing.
  • The Seattle Mariners 401(k) Plan reported participants rose from 411 in the plan year 2022 filing to 468 in the plan year 2023 filing.

See the national 2022→2023 release diff →

Plan-year Form 5500 strip

Filing strip 911545344 · The Baseball Club of Seattle, Lllp PY 2023 · 401(k)

The Seattle Mariners 401(k) Plan · $59M · 468 · 87th

  • NET $59M
  • NET 468
  • NET 87th
  • NET 401(k)
  • NET near Clune Construction Company 401(k) Retirement Plan
  • NET ind #2735

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 Arts, Entertainment & Recreation retirement plans → · Plans in Washington →

The Seattle Mariners 401(k) Plan in the asset neighbourhood

Gulf Coast Bank and Trust Company Savings Incentive PlanGulf Coast Bank and Trust Co…$60MThe Seattle Mariners 401(k) PlanThe Seattle Mariners 401(k) …$59MClune Construction Company 401(k) Retirement PlanClune Construction Company 4…$59MRockford Anesthesiologists Employee Retirement PlanRockford Anesthesiologists E…$59MOrepac Savings and Investment PlanOrepac Savings and Investmen…$59M
End-of-year total assets ($M) among The Seattle Mariners 401(k) Plan and nearest nationwide 401(k) peers. Source: DOL Form 5500 plan year 2023.

Washington filing particulars

Total Assets (Beginning of Year)$47M
Net Assets (End of Year)$59M
Net Income$13M
Employer EIN911545344
Plan Effective Date1994-07-01
Filing StatusFILING RECEIVED

Sponsor Plan History (The Baseball Club of Seattle, Lllp)

Sponsor-wide plan assets over time

All The Baseball Club of Seattle, Lllp plans reported in each filing year

Latest sponsor-wide plan assets
$120M 4.214444885863325% vs 2022
2024 filing year
$110M$115M$120M$125M$130M$135M 202220232024 $115M $120M ▲ +4.2%
Year Plans Participants Total Assets
2022 2 530 $115M
2023 2 578 $129M
2024 2 587 $120M

Nearby 401(k) Plans in Washington

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

The Seattle Mariners 401(k) Plan vs. nearby 401(k) plans in Washington, assets vs. participants Scatter plot of 6 data points. -50000050000100000150000200000250000 -20020406080 Total assets ($B) Participants The Seattle Mariners 401(k) Plan, Total assets ($B): 0.059499438 · Participants: 468The Seattle Mariners 401(k) PlanThe Boeing Company 401(k) Retirement Plan, Total assets ($B): 72.246135158 · Participants: 128910The Boeing Company 401(k) Retirement PlanMicrosoft Corporation Savings Plus 401(k) Plan, Total assets ($B): 53.225853429 · Participants: 123296Microsoft Corporation Savings Plus 401(k) PlanCostco 401(k) Retirement Plan, Total assets ($B): 33.384845813 · Participants: 192744Costco 401(k) Retirement PlanT-Mobile USA, Inc. 401(k) Retirement Savings Plan & Trust, Total assets ($B): 8.338937292 · Participants: 71538T-Mobile USA, Inc. 401(k) Retirement Savings Plan & Trust401(k) Savings Plan, Total assets ($B): 8.118808679 · Participants: 87590401(k) Savings Plan
The Seattle Mariners 401(k) Plan vs. nearby 401(k) plans in Washington, assets vs. participants
Compare The Seattle Mariners 401(k) Plan side-by-side with 3 peers →

The Seattle Mariners 401(k) Plan's out-of-state 401(k) peers by assets and headcount

Outside Washington, the nearest 401(k) by assets is Clune Construction Company 401(k) Retirement Plan in IL ($59M); by covered participants it is Banterra Corp. Profit Sharing Plan in IL (468 participants). Same-state nearby plans are listed separately above.

Similar participant headcount

Nearest other-state filings by covered participants (468 participants); asset peers above are excluded.

DOL Form 5500 plan year 2023. Asset totals can differ widely at the same headcount; neither axis is a quality rating.

Frequently Asked Questions

How did The Seattle Mariners 401(k) Plan assets move in 2023? ▼
The Seattle Mariners 401(k) Plan grew sharply - up 27.7% during 2023, from $47M to $59M. Reported net income was $13M.
How have The Baseball Club of Seattle, Lllp plan assets changed over time? ▼
Across 3 plan years on file (2022-2024), The Baseball Club of Seattle, Lllp's sponsor-wide assets grew 4.2%, from $115M to $120M.
Where does The Seattle Mariners 401(k) Plan rank by assets among Form 5500 filers? ▼
The Seattle Mariners 401(k) Plan ranks in the 87th percentile by end-of-year assets among 127,072 plans that reported assets for plan year 2023 (in the top quartile of all filed plans by assets).
Which 401(k) plans are similar in size to The Seattle Mariners 401(k) Plan? ▼
Among 401(k) plans in other states, the closest by assets is Clune Construction Company 401(k) Retirement Plan in IL ($59M, 637 participants).
Which 401(k) plans cover a similar participant headcount to The Seattle Mariners 401(k) Plan? ▼
Among 401(k) plans in other states, the closest by covered participants is Banterra Corp. Profit Sharing Plan in IL (468 participants, $65M in assets).

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 911545344.

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.