401(k) · DOL Form 5500 · 2023

Marin Sanitary Service, Inc. 401(k) Plan

Data updated 2026-08-25

$36M
Total assets Below avg plan size
184
Participants Below avg headcount
82nd
Percentile by assets National rank
$195,716
Avg per participant Above avg balance/head
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Official DOL plan name: Sonoma Marin 401(k) Plan · Sponsored by Marin Sanitary Service, Inc. · California · Administrative & Support Services

$36M in assets, 184 participants

Marin Sanitary Service, Inc.'s Sonoma Marin 401(k) Plan reported $36M in total assets and 184 participants in its 2023 DOL Form 5500 filing, ranking in the 82nd 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.

  • #3,972 in Administrative & Support Services (4,372 peers)

Coverage in California

Sonoma Marin 401(k) Plan covers 184 participants in California, about 29% of the average California filer (state average ~630 per filing). Assets: $36M.

#3,972
in Administrative & Support Services (4,372 peers)
+18.2%
assets growth YoY
0.4×
vs typical plan assets (national mean)

Sonoma Marin 401(k) Plan's outsized position by total assets

Sonoma Marin 401(k) Plan vs every filed plan by assets

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

$36,011,700 Top 18% higher than 82% 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

Sonoma Marin 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. Sonoma Marin 401(k) Plan sits mid-pack in the medium band (184 participants).

What changed between DOL Form 5500 filings

plan year 2022 → plan year 2023

  • Sonoma Marin 401(k) Plan reported net income rose from -$3M in the plan year 2022 filing to $6M in the plan year 2023 filing.
  • Sonoma Marin 401(k) Plan end-of-year assets rose from $30M in the plan year 2022 filing to $36M in the plan year 2023 filing.
  • Sonoma Marin 401(k) Plan reported participants rose from 178 in the plan year 2022 filing to 184 in the plan year 2023 filing.

See the national 2022→2023 release diff →

Form 5500 schedule snapshot

Filing strip 941520192 · Marin Sanitary Service, Inc. PY 2023 · 401(k)

Sonoma Marin 401(k) Plan · $36M · 184 · 82nd

  • EOY $36M
  • 5500 184
  • ASSETS 82nd
  • PCT 401(k)
  • EIN near Piedmont Triad Anesthesia Retirement Plan
  • RANK ind #3972

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 Administrative & Support Services retirement plans → · Plans in California →

Sonoma Marin 401(k) Plan in the asset neighbourhood

Kcg, Inc. 401(k) Plan$36MSonoma Marin 401(k) Plan$36MPiedmont Triad Anesthesia Retirement PlanPiedmont Triad Anesthesia Re…$36MPaul Miller & Its Affiliates 401(k) PlanPaul Miller & Its Affiliates…$36MStutzman, Bromberg, Esserman & Plifka 401(k) Retirement PlanStutzman, Bromberg, Esserman…$36M
End-of-year total assets ($M) among Sonoma Marin 401(k) Plan and nearest nationwide 401(k) peers. Source: DOL Form 5500 plan year 2023.

California filing particulars

Total Assets (Beginning of Year)$30M
Net Assets (End of Year)$36M
Net Income$6M
Employer EIN941520192
Plan Effective Date1992-01-01
Filing StatusFILING RECEIVED

Sponsor Plan History (Marin Sanitary Service, Inc.)

Sponsor-wide plan assets over time

All Marin Sanitary Service, Inc. plans reported in each filing year

Latest sponsor-wide plan assets
$41M 33.738735242187126% vs 2022
2024 filing year
$25M$30M$35M$40M$45M 202220232024 $30.5M $40.7M ▲ +33.8%
Year Plans Participants Total Assets
2022 1 178 $30M
2023 1 184 $36M
2024 1 185 $41M

Nearby 401(k) Plans in California

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

Sonoma Marin 401(k) Plan vs. nearby 401(k) plans in California, assets vs. participants Scatter plot of 6 data points. -50000050000100000150000200000250000 -200204060 Total assets ($B) Participants Sonoma Marin 401(k) Plan, Total assets ($B): 0.0360117 · Participants: 184Sonoma Marin 401(k) PlanWells Fargo & Company 401(k) Plan, Total assets ($B): 51.831350351 · Participants: 193919Wells Fargo & Company 401(k) PlanGoogle LLC 401(k) Savings Plan, Total assets ($B): 39.047152408 · Participants: 122867Google LLC 401(k) Savings PlanOracle Corporation 401(k) Savings and Investment Plan, Total assets ($B): 26.320437734 · Participants: 63105Oracle Corporation 401(k) Savings and Investment PlanIntel 401(k) Savings Plan, Total assets ($B): 22.17918189 · Participants: 59863Intel 401(k) Savings PlanApple 401(k) Plan, Total assets ($B): 19.779511539 · Participants: 106111Apple 401(k) Plan
Sonoma Marin 401(k) Plan vs. nearby 401(k) plans in California, assets vs. participants
Compare Sonoma Marin 401(k) Plan side-by-side with 3 peers →

Sonoma Marin 401(k) Plan's out-of-state 401(k) peers by assets and headcount

Outside California, the nearest 401(k) by assets is Piedmont Triad Anesthesia Retirement Plan in NC ($36M); by covered participants it is Afiniti 401(k) Plan in DC (184 participants). Same-state nearby plans are listed separately above.

Similar participant headcount

Nearest other-state filings by covered participants (184 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 Sonoma Marin 401(k) Plan assets move in 2023? ▼
Sonoma Marin 401(k) Plan grew sharply - up 18.2% during 2023, from $30M to $36M. Reported net income was $6M.
How have Marin Sanitary Service, Inc. plan assets changed over time? ▼
Across 3 plan years on file (2022-2024), Marin Sanitary Service, Inc.'s sponsor-wide assets grew 33.7%, from $30M to $41M.
Where does Sonoma Marin 401(k) Plan rank by assets among Form 5500 filers? ▼
Sonoma Marin 401(k) Plan ranks in the 82nd 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 Sonoma Marin 401(k) Plan? ▼
Among 401(k) plans in other states, the closest by assets is Piedmont Triad Anesthesia Retirement Plan in NC ($36M, 69 participants).
Which 401(k) plans cover a similar participant headcount to Sonoma Marin 401(k) Plan? ▼
Among 401(k) plans in other states, the closest by covered participants is Afiniti 401(k) Plan in DC (184 participants, $5M 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 941520192.

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.