401(k) · DOL Form 5500 · 2024

Piston Automotive, LLC 401(k) Plan

Data updated 2026-08-25

$42M
Total assets Below avg plan size
1,195
Participants Near avg headcount
82nd
Percentile by assets National rank
$35,252
Avg per participant Low balance/head
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Official DOL plan name: Piston Group 401(k) Plan · Sponsored by Piston Automotive, LLC · Michigan · Manufacturing

$42M in assets, 1,195 participants

Piston Automotive, LLC's Piston Group 401(k) Plan reported $42M in total assets and 1,195 participants in its 2024 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.

  • #13,303 in Manufacturing (17,777 peers)

Where Piston Group 401(k) Plan sits by assets

Piston Group 401(k) Plan sits in the top quartile of all filed plans by assets, $42M for 1,195 participants (~$35,252/participant), up 21.3% in 2024.

#13,303
in Manufacturing (17,777 peers)
+21.3%
assets growth YoY
0.4×
vs typical plan assets (national mean)

Piston Group 401(k) Plan's outsized position by total assets

Piston Group 401(k) Plan vs every filed plan by assets

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

$42,126,630 Top 18% higher than 82% 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

Piston Group 401(k) 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. Piston Group 401(k) Plan lands in the large band (1,195 participants).

What changed between DOL Form 5500 filings

plan year 2023 → plan year 2024

  • Piston Group 401(k) Plan reported participants rose from 977 in the plan year 2023 filing to 1,195 in the plan year 2024 filing.
  • Piston Group 401(k) Plan end-of-year assets rose from $35M in the plan year 2023 filing to $42M in the plan year 2024 filing.
  • Piston Group 401(k) Plan reported net income fell from $8M in the plan year 2023 filing to $7M in the plan year 2024 filing.

See the national 2023→2024 release diff →

Published 5500 schedule card

Filing strip 383355223 · Piston Automotive, LLC PY 2024 · 401(k)

Piston Group 401(k) Plan · $42M · 1,195 · 82nd

  • BOOK $42M
  • BOOK 1,195
  • BOOK 82nd
  • BOOK 401(k)
  • BOOK near California School Employees Association 401(k) Plan
  • BOOK ind #13303

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 Manufacturing retirement plans → · Plans in Michigan →

Piston Group 401(k) Plan in the asset neighbourhood

Piston Group 401(k) Plan$42MCalifornia School Employees Association 401(k) PlanCalifornia School Employees …$42MNovatech, L.L.C. 401(k) Plan$42MRevolution Medicines, Inc. 401(k) Savings PlanRevolution Medicines, Inc. 4…$42MCorcoran Jennison Companies 401(k) PlanCorcoran Jennison Companies …$42M
End-of-year total assets ($M) among Piston Group 401(k) Plan and nearest nationwide 401(k) peers. Source: DOL Form 5500 plan year 2024.

Scale-class filing particulars (2024)

Total Assets (Beginning of Year)$35M
Net Assets (End of Year)$42M
Net Income$7M
Employer EIN383355223
Plan Effective Date1991-07-01
Filing StatusFILING RECEIVED

Sponsor Plan History (Piston Automotive, LLC)

Sponsor-wide plan assets over time

All Piston Automotive, LLC plans reported in each filing year

Latest sponsor-wide plan assets
$42M 55.96781792934436% vs 2022
2024 filing year
$25M$30M$35M$40M$45M 202220232024 $27M $42.1M ▲ +56.0%
Year Plans Participants Total Assets
2022 1 903 $27M
2023 1 977 $35M
2024 1 1,195 $42M

Nearby 401(k) Plans in Michigan

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

Piston Group 401(k) Plan vs. nearby 401(k) plans in Michigan, assets vs. participants Scatter plot of 6 data points. -20000020000400006000080000 -100102030 Total assets ($B) Participants Piston Group 401(k) Plan, Total assets ($B): 0.04212663 · Participants: 1195Piston Group 401(k) PlanGeneral Motors Retirement Savings Plan for Salaried Employees in the United States, Total assets ($B): 23.0591668 · Participants: 43053General Motors Retirement Savings Plan for Salaried Employees in the United StatesFord Motor Co. Savings and Stock Investment Plan for Salaried Employees, Total assets ($B): 17.26893589 · Participants: 31790Ford Motor Co. Savings and Stock Investment Plan for Salaried EmployeesThe Dow Chemical Company Employees' Savings Plan, Total assets ($B): 10.768606712 · Participants: 17128The Dow Chemical Company Employees' Savings PlanThe General Motors Personal Savings Plan for Hourly-Rate Employees in the United States, Total assets ($B): 9.568379082 · Participants: 42513The General Motors Personal Savings Plan for Hourly-Rate Employees in the United StatesFord Motor Co. Tax-Efficient Savings Plan for Hourly Employees, Total assets ($B): 8.2932975 · Participants: 60497Ford Motor Co. Tax-Efficient Savings Plan for Hourly Employees
Piston Group 401(k) Plan vs. nearby 401(k) plans in Michigan, assets vs. participants
Compare Piston Group 401(k) Plan side-by-side with 3 peers →

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

Outside Michigan, the nearest 401(k) by assets is California School Employees Association 401(k) Plan in CA ($42M); by covered participants it is Medallia, Inc. 401(k) Plan in CA (1,195 participants). Same-state nearby plans are listed separately above.

Similar participant headcount

Nearest other-state filings by covered participants (1,195 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 Piston Group 401(k) Plan assets move in 2024? ▼
Piston Group 401(k) Plan grew sharply - up 21.3% during 2024, from $35M to $42M. Reported net income was $7M.
How have Piston Automotive, LLC plan assets changed over time? ▼
Across 3 plan years on file (2022-2024), Piston Automotive, LLC's sponsor-wide assets grew 56.0%, from $27M to $42M.
Where does Piston Group 401(k) Plan rank by assets among Form 5500 filers? ▼
Piston Group 401(k) Plan ranks in the 82nd 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 Piston Group 401(k) Plan? ▼
Among 401(k) plans in other states, the closest by assets is California School Employees Association 401(k) Plan in CA ($42M, 270 participants).
Which 401(k) plans cover a similar participant headcount to Piston Group 401(k) Plan? ▼
Among 401(k) plans in other states, the closest by covered participants is Medallia, Inc. 401(k) Plan in CA (1,195 participants, $213M 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 383355223.

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.