401(k) · DOL Form 5500 · 2023

Rock Holdings, Inc. 401(k) Plan

Data updated 2026-08-25

$1.9B
Total assets Very large vs avg
18,984
Participants Very large workforce
99th
Percentile by assets National rank
$101,444
Avg per participant Below avg balance/head
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Official DOL plan name: Rock Holdings & Associated Companies Savings Plan · Sponsored by Rock Holdings, Inc. · Michigan · Finance & Insurance

$1.9B in assets, 18,984 participants

Rock Holdings, Inc.'s Rock Holdings & Associated Companies Savings Plan reported $1.9B in total assets and 18,984 participants in its 2023 DOL Form 5500 filing, ranking in the 99th 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.

  • #8,739 in Finance & Insurance (8,869 peers)

Coverage in Michigan

Rock Holdings & Associated Companies Savings Plan covers 18,984 participants in Michigan, 30x the typical Michigan plan (state average ~638 per filing). Assets: $1.9B.

#8,739
in Finance & Insurance (8,869 peers)
+17.7%
assets growth YoY
19×
vs typical plan assets (national mean)

Rock Holdings & Associated Companies Savings Plan's outsized position by total assets

Rock Holdings & Associated Companies Savings Plan vs every filed plan by assets

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

$1,925,817,555 Top 1% higher than 99% 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

Rock Holdings & Associated Companies Savings Plan's mega-plan peer group by participant headcount

Plan-year 2023 Form 5500 filings with a reported participant count, partitioned by headcount band, not by assets. Rock Holdings & Associated Companies Savings Plan is a mega filing (18,984 participants), the rightmost band on the breakdown.

What changed between DOL Form 5500 filings

plan year 2022 → plan year 2023

  • Rock Holdings & Associated Companies Savings Plan reported net income rose from -$330M in the plan year 2022 filing to $290M in the plan year 2023 filing.
  • Rock Holdings & Associated Companies Savings Plan reported participants fell from 27,216 in the plan year 2022 filing to 18,984 in the plan year 2023 filing.
  • Rock Holdings & Associated Companies Savings Plan end-of-year assets rose from $1.6B in the plan year 2022 filing to $1.9B in the plan year 2023 filing.

See the national 2022→2023 release diff →

Published 5500 schedule card

Filing strip 510415135 · Rock Holdings, Inc. PY 2023 · 401(k)

Rock Holdings & Associated Companies Savings Plan · $1.9B · 18,984 · 99th

  • BOOK $1.9B
  • BOOK 18,984
  • BOOK 99th
  • BOOK 401(k)
  • BOOK near Tcs 401(k) Plan
  • BOOK ind #8739

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 Finance & Insurance retirement plans → · Plans in Michigan →

Rock Holdings & Associated Companies Savings Plan in the asset neighbourhood

Rock Holdings & Associated Companies Savings PlanRock Holdings & Associated C…$1.9BTcs 401(k) Plan$1.9BOri 401(k) Savings and Profit Sharing PlanOri 401(k) Savings and Profi…$1.9BNcr Savings Plan$1.9BAssurant 401(k) Plan$1.9B
End-of-year total assets ($B) among Rock Holdings & Associated Companies Savings Plan and nearest nationwide 401(k) peers. Source: DOL Form 5500 plan year 2023.

Michigan filing particulars

Total Assets (Beginning of Year)$1.6B
Net Assets (End of Year)$1.9B
Net Income$290M
Employer EIN510415135
Plan Effective Date2002-08-01
Filing StatusFILING RECEIVED

Sponsor Plan History (Rock Holdings, Inc.)

Sponsor-wide plan assets over time

All Rock Holdings, Inc. plans reported in each filing year

Latest sponsor-wide plan assets
$2.2B 36.172161579248154% vs 2022
2024 filing year
$1.4B$1.6B$1.8B$2B$2.2B$2.4B 202220232024 $1.64B $2.23B ▲ +36.0%
Year Plans Participants Total Assets
2022 1 27,216 $1.6B
2023 1 18,984 $1.9B
2024 1 15,298 $2.2B

Nearby 401(k) Plans in Michigan

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

Rock Holdings & Associated Companies Savings Plan vs. nearby 401(k) plans in Michigan, assets vs. participants Scatter plot of 6 data points. 10000200003000040000500006000070000 0510152025 Total assets ($B) Participants Rock Holdings & Associated Companies Savings Plan, Total assets ($B): 1.925817555 · Participants: 18984Rock Holdings & Associated Companies Savings PlanGeneral Motors Retirement Savings Plan for Salaried Employees in the United States, Total assets ($B): 20.378449285 · Participants: 47299General Motors Retirement Savings Plan for Salaried Employees in the United StatesFord Motor Co. Savings and Stock Investment Plan for Salaried Employees, Total assets ($B): 15.588575271 · Participants: 30516Ford Motor Co. Savings and Stock Investment Plan for Salaried EmployeesThe Dow Chemical Company Employees' Savings Plan, Total assets ($B): 10.084842211 · Participants: 18088The Dow Chemical Company Employees' Savings PlanThe General Motors Personal Savings Plan for Hourly-Rate Employees in the United States, Total assets ($B): 8.580684909 · Participants: 40393The 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): 7.617084451 · Participants: 59195Ford Motor Co. Tax-Efficient Savings Plan for Hourly Employees
Rock Holdings & Associated Companies Savings Plan vs. nearby 401(k) plans in Michigan, assets vs. participants
Compare Rock Holdings & Associated Companies Savings Plan side-by-side with 3 peers →

Scale composition for Rock Holdings & Associated Companies Savings Plan

Rock Holdings & Associated Companies Savings Plan reports $1.9B in end-of-year assets across 18,984 participants (0.016% of the $12.3T held by all Form 5500 filers in the national rollup , and 0.020% of 93,925,755 covered participants) - about $101,444 per participant (73% of the national average assets-per-participant) . Net income for plan year 2023 was $290M.

This plan identity (EIN 510415135, plan #005) has 3 Form 5500 filings on file from 2022 to 2024 , with end-of-year assets moving from $1.6B to $2.2B (+36.2%) while covered participants moved from 27,216 to 15,298 . Single-year sparse filers cannot show that trail.

Plan year Participants EOY assets Filing
2022 27,216 $1.6B Open filing
2023 18,984 $1.9B This page
2024 · index core 15,298 $2.2B Open filing

The same sponsor also keeps 1 other index-core plan on PlainRetire:

Rock Holdings & Associated Companies Savings Plan's out-of-state 401(k) peers by assets and headcount

Outside Michigan, the nearest 401(k) by assets is Tcs 401(k) Plan in NJ ($1.9B); by covered participants it is John Deere Savings and Investment Plan in IL (19,031 participants). Same-state nearby plans are listed separately above.

Closest by plan assets

Nearest other-state filings by tot_assets_eoy ($1.9B here).

Similar participant headcount

Nearest other-state filings by covered participants (18,984 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 Rock Holdings & Associated Companies Savings Plan assets move in 2023? ▼
Rock Holdings & Associated Companies Savings Plan grew sharply - up 17.7% during 2023, from $1.6B to $1.9B. Reported net income was $290M.
How have Rock Holdings, Inc. plan assets changed over time? ▼
Across 3 plan years on file (2022-2024), Rock Holdings, Inc.'s sponsor-wide assets grew 36.2%, from $1.6B to $2.2B.
Where does Rock Holdings & Associated Companies Savings Plan rank by assets among Form 5500 filers? ▼
Rock Holdings & Associated Companies Savings Plan ranks in the 99th percentile by end-of-year assets among 127,072 plans that reported assets for plan year 2023 (among the largest 1% of all filed plans).
Which 401(k) plans are similar in size to Rock Holdings & Associated Companies Savings Plan? ▼
Among 401(k) plans in other states, the closest by assets is Tcs 401(k) Plan in NJ ($1.9B, 52,922 participants).
Which 401(k) plans cover a similar participant headcount to Rock Holdings & Associated Companies Savings Plan? ▼
Among 401(k) plans in other states, the closest by covered participants is John Deere Savings and Investment Plan in IL (19,031 participants, $11.0B 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 510415135.

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.