401(k) · DOL Form 5500 · 2024

Peter H. Mattson & Co., Inc. 401(k) Plan

Data updated 2026-08-25

$33M
Total assets Below avg plan size
59
Participants Small participant base
79th
Percentile by assets National rank
$552,127
Avg per participant High balance/head
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Official DOL plan name: Mattson & Co. 401(k) Savings Plan · Sponsored by Peter H. Mattson & Co., Inc. · California · Professional & Technical Services

$33M in assets, 59 participants

Peter H. Mattson & Co., Inc.'s Mattson & Co. 401(k) Savings Plan reported $33M in total assets and 59 participants in its 2024 DOL Form 5500 filing, ranking in the 79th 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.

  • #15,892 in Professional & Technical Services (20,173 peers)

Where Mattson & Co. 401(k) Savings Plan sits by assets

Mattson & Co. 401(k) Savings Plan sits in the top quartile of all filed plans by assets, $33M for 59 participants (~$552,127/participant), up 21.1% in 2024.

#15,892
in Professional & Technical Services (20,173 peers)
+21.1%
assets growth YoY
0.3×
vs typical plan assets (national mean)

Mattson & Co. 401(k) Savings Plan's outsized position by total assets

Mattson & Co. 401(k) Savings Plan vs every filed plan by assets

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

$32,575,515 Top 21% higher than 79% 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

Mattson & Co. 401(k) Savings Plan among smaller filed plans by headcount

Plan-year 2024 Form 5500 filings with a reported participant count, partitioned by headcount band, not by assets. Mattson & Co. 401(k) Savings Plan is a small filing (59 participants) on this national headcount ladder.

What changed between DOL Form 5500 filings

plan year 2023 → plan year 2024

  • Mattson & Co. 401(k) Savings Plan end-of-year assets rose from $27M in the plan year 2023 filing to $33M in the plan year 2024 filing.
  • Mattson & Co. 401(k) Savings Plan reported participants fell from 62 in the plan year 2023 filing to 59 in the plan year 2024 filing.
  • Mattson & Co. 401(k) Savings Plan reported net income rose from $5M in the plan year 2023 filing to $6M in the plan year 2024 filing.

See the national 2023→2024 release diff →

EBSA filing schedule strip

Filing strip 942456738 · Peter H. Mattson & Co., Inc. PY 2024 · 401(k)

Mattson & Co. 401(k) Savings Plan · $33M · 59 · 79th

  • BOY $33M
  • SCH 59
  • EBSA 79th
  • PART 401(k)
  • TYPE near Simon Roofing & Sheet Metal Corp 401(k) Profit Sharing
  • NET ind #15892

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 California →

Mattson & Co. 401(k) Savings Plan in the asset neighbourhood

Mattson & Co. 401(k) Savings PlanMattson & Co. 401(k) Savings…$33MMid-Hudson Valley Federal Credit Union 401(k) PlanMid-Hudson Valley Federal Cr…$33MJim's Formal Wear Inc 401(k) Profit Sharing PlanJim's Formal Wear Inc 401(k)…$33MSimon Roofing & Sheet Metal Corp 401(k) Profit SharingSimon Roofing & Sheet Metal …$33MNeuroscience Group of Northeast Wisconsin,S.C. Profit Sharing Plan and TrustNeuroscience Group of Northe…$33M
End-of-year total assets ($M) among Mattson & Co. 401(k) Savings Plan and nearest nationwide 401(k) peers. Source: DOL Form 5500 plan year 2024.

Scale-class filing particulars (2024)

Total Assets (Beginning of Year)$27M
Net Assets (End of Year)$33M
Net Income$6M
Employer EIN942456738
Plan Effective Date2002-07-01
Filing StatusFILING RECEIVED

Sponsor Plan History (Peter H. Mattson & Co., Inc.)

Sponsor-wide plan assets over time

All Peter H. Mattson & Co., Inc. plans reported in each filing year

Latest sponsor-wide plan assets
$39M 24.29576407628043% vs 2022
2024 filing year
$30M$35M$40M 202220232024 $31.1M $38.7M ▲ +24.3%
Year Plans Participants Total Assets
2022 2 116 $31M
2023 2 123 $35M
2024 2 120 $39M

Nearby 401(k) Plans in California

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

Mattson & Co. 401(k) Savings Plan vs. nearby 401(k) plans in California, assets vs. participants Scatter plot of 6 data points. -50000050000100000150000 -200204060 Total assets ($B) Participants Mattson & Co. 401(k) Savings Plan, Total assets ($B): 0.032575515 · Participants: 59Mattson & Co. 401(k) Savings PlanGoogle LLC 401(k) Savings Plan, Total assets ($B): 48.738057415 · Participants: 116712Google LLC 401(k) Savings PlanOracle Corporation 401(k) Savings and Investment Plan, Total assets ($B): 31.02646504 · Participants: 58962Oracle Corporation 401(k) Savings and Investment PlanIntel 401(k) Savings Plan, Total assets ($B): 24.850880304 · Participants: 55298Intel 401(k) Savings PlanApple 401(k) Plan, Total assets ($B): 24.714519387 · Participants: 101450Apple 401(k) PlanCisco Systems,Inc. 401(k) Plan, Total assets ($B): 22.728425546 · Participants: 40452Cisco Systems,Inc. 401(k) Plan
Mattson & Co. 401(k) Savings Plan vs. nearby 401(k) plans in California, assets vs. participants
Compare Mattson & Co. 401(k) Savings Plan side-by-side with 3 peers →

Mattson & Co. 401(k) Savings Plan's out-of-state 401(k) peers by assets and headcount

Outside California, the nearest 401(k) by assets is Simon Roofing & Sheet Metal Corp 401(k) Profit Sharing in OH ($33M); by covered participants it is Elite Cuisine, LLC 401(k) Profit Sharing Plan in MO (59 participants). Same-state nearby plans are listed separately above.

Similar participant headcount

Nearest other-state filings by covered participants (59 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 Mattson & Co. 401(k) Savings Plan assets move in 2024? ▼
Mattson & Co. 401(k) Savings Plan grew sharply - up 21.1% during 2024, from $27M to $33M. Reported net income was $6M.
How have Peter H. Mattson & Co., Inc. plan assets changed over time? ▼
Across 3 plan years on file (2022-2024), Peter H. Mattson & Co., Inc.'s sponsor-wide assets grew 24.3%, from $31M to $39M.
Where does Mattson & Co. 401(k) Savings Plan rank by assets among Form 5500 filers? ▼
Mattson & Co. 401(k) Savings Plan ranks in the 79th percentile by end-of-year assets among 123,622 plans that reported assets for plan year 2024 (in the top quartile of all filed plans by assets).
Which 401(k) plans are similar in size to Mattson & Co. 401(k) Savings Plan? ▼
Among 401(k) plans in other states, the closest by assets is Simon Roofing & Sheet Metal Corp 401(k) Profit Sharing in OH ($33M, 450 participants).
Which 401(k) plans cover a similar participant headcount to Mattson & Co. 401(k) Savings Plan? ▼
Among 401(k) plans in other states, the closest by covered participants is Elite Cuisine, LLC 401(k) Profit Sharing Plan in MO (59 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 942456738.

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.