401(k) · DOL Form 5500 · 2024

Alterra Mountain Company 401(k) Plan

Data updated 2026-08-25

$366M
Total assets Above avg plan size
10,620
Participants Very large workforce
96th
Percentile by assets National rank
$34,448
Avg per participant Low balance/head
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Official DOL plan name: Alterra Mountain Company U.S. Inc. 401(k) Retirement Plan · Sponsored by Alterra Mountain Company · Colorado · Arts, Entertainment & Recreation

$366M in assets, 10,620 participants

Alterra Mountain Company's Alterra Mountain Company U.S. Inc. 401(k) Retirement Plan reported $366M in total assets and 10,620 participants in its 2024 DOL Form 5500 filing, ranking in the 96th 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.

  • #2,882 in Arts, Entertainment & Recreation (2,921 peers)

Coverage in Colorado

Alterra Mountain Company U.S. Inc. 401(k) Retirement Plan covers 10,620 participants in Colorado, 28x the typical Colorado plan (state average ~376 per filing). Assets: $366M.

#2,882
in Arts, Entertainment & Recreation (2,921 peers)
+17.8%
assets growth YoY
3.7×
vs typical plan assets (national mean)

Alterra Mountain Company U.S. Inc. 401(k) Retirement Plan's outsized position by total assets

Alterra Mountain Company U.S. Inc. 401(k) Retirement Plan vs every filed plan by assets

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

$365,835,665 Top 4% higher than 96% 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

Alterra Mountain Company U.S. Inc. 401(k) Retirement Plan's mega-plan peer group by participant headcount

Plan-year 2024 Form 5500 filings with a reported participant count, partitioned by headcount band, not by assets. Alterra Mountain Company U.S. Inc. 401(k) Retirement Plan is a mega filing (10,620 participants), the rightmost band on the breakdown.

What changed between DOL Form 5500 filings

plan year 2023 → plan year 2024

  • Alterra Mountain Company U.S. Inc. 401(k) Retirement Plan reported net income fell from $70M in the plan year 2023 filing to $55M in the plan year 2024 filing.
  • Alterra Mountain Company U.S. Inc. 401(k) Retirement Plan end-of-year assets rose from $310M in the plan year 2023 filing to $366M in the plan year 2024 filing.
  • Alterra Mountain Company U.S. Inc. 401(k) Retirement Plan reported participants fell from 11,850 in the plan year 2023 filing to 10,620 in the plan year 2024 filing.

See the national 2023→2024 release diff →

Published 5500 schedule card

Filing strip 911616891 · Alterra Mountain Company PY 2024 · 401(k)

Alterra Mountain Company U.S. Inc. 401(k) Retirement Plan · $366M · 10,620 · 96th

  • PHOTO $366M
  • IND 10,620
  • EOY 96th
  • 5500 401(k)
  • ASSETS near Joyson Safety Systems 401(k) Plan
  • PCT ind #2882

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 Colorado →

Alterra Mountain Company U.S. Inc. 401(k) Retirement Plan in the asset neighbourhood

Tenaris 401(k) Savings Plan$366MAlterra Mountain Company U.S. Inc. 401(k) Retirement PlanAlterra Mountain Company U.S…$366MJoyson Safety Systems 401(k) PlanJoyson Safety Systems 401(k)…$366MStandard Motor Products, Inc. Profit Sharing 401(k) Capital Accumulation PlanStandard Motor Products, Inc…$366MThe Kaplan, Inc. Tax Deferred Savings Plan for Salaried EmployeesThe Kaplan, Inc. Tax Deferre…$366M
End-of-year total assets ($M) among Alterra Mountain Company U.S. Inc. 401(k) Retirement Plan and nearest nationwide 401(k) peers. Source: DOL Form 5500 plan year 2024.

Colorado filing particulars

Total Assets (Beginning of Year)$310M
Net Assets (End of Year)$366M
Net Income$55M
Employer EIN911616891
Plan Effective Date1978-06-30
Filing StatusFILING RECEIVED

Sponsor Plan History (Alterra Mountain Company)

Sponsor-wide plan assets over time

All Alterra Mountain Company plans reported in each filing year

Latest sponsor-wide plan assets
$366M 52.330290910832176% vs 2022
2024 filing year
$200M$250M$300M$350M$400M 202220232024 $240M $366M ▲ +52.3%
Year Plans Participants Total Assets
2022 1 12,118 $240M
2023 1 11,850 $310M
2024 1 10,620 $366M

Nearby 401(k) Plans in Colorado

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

Alterra Mountain Company U.S. Inc. 401(k) Retirement Plan vs. nearby 401(k) plans in Colorado, assets vs. participants Scatter plot of 6 data points. 020000400006000080000 01234 Total assets ($B) Participants Alterra Mountain Company U.S. Inc. 401(k) Retirement Plan, Total assets ($B): 0.365835665 · Participants: 10620Alterra Mountain Company U.S. Inc. 401(k) Retirement PlanDavita Retirement Savings Plan, Total assets ($B): 3.81412558 · Participants: 57900Davita Retirement Savings PlanBall Corporation 401(k) and Employee Stock Ownership Plan, Total assets ($B): 2.319532435 · Participants: 9935Ball Corporation 401(k) and Employee Stock Ownership PlanArcadis U.S., Inc. Retirement Savings Plan, Total assets ($B): 2.259964434 · Participants: 7607Arcadis U.S., Inc. Retirement Savings PlanEmpower Retirement, LLC 401(k) Savings Plan, Total assets ($B): 2.234179481 · Participants: 10185Empower Retirement, LLC 401(k) Savings PlanWoodward Retirement Savings Plan, Total assets ($B): 1.965265264 · Participants: 6210Woodward Retirement Savings Plan
Alterra Mountain Company U.S. Inc. 401(k) Retirement Plan vs. nearby 401(k) plans in Colorado, assets vs. participants
Compare Alterra Mountain Company U.S. Inc. 401(k) Retirement Plan side-by-side with 3 peers →

Scale composition for Alterra Mountain Company U.S. Inc. 401(k) Retirement Plan

Alterra Mountain Company U.S. Inc. 401(k) Retirement Plan reports $366M in end-of-year assets across 10,620 participants (0.003% of the $12.3T held by all Form 5500 filers in the national rollup , and 0.011% of 93,925,755 covered participants) - about $34,448 per participant (25% of the national average assets-per-participant) . Net income for plan year 2024 was $55M.

This plan identity (EIN 911616891, plan #001) has 3 Form 5500 filings on file from 2022 to 2024 , with end-of-year assets moving from $240M to $366M (+52.3%) while covered participants moved from 12,118 to 10,620 . Single-year sparse filers cannot show that trail.

Plan year Participants EOY assets Filing
2022 12,118 $240M Open filing
2023 11,850 $310M Open filing
2024 · index core 10,620 $366M This page

Alterra Mountain Company U.S. Inc. 401(k) Retirement Plan's out-of-state 401(k) peers by assets and headcount

Outside Colorado, the nearest 401(k) by assets is Joyson Safety Systems 401(k) Plan in MI ($366M); by covered participants it is The 401(k) Savings and Profit Sharing Plan of S&p Global Inc. and Its Subsidiaries in NY (10,615 participants). Same-state nearby plans are listed separately above.

Similar participant headcount

Nearest other-state filings by covered participants (10,620 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 Alterra Mountain Company U.S. Inc. 401(k) Retirement Plan assets move in 2024? ▼
Alterra Mountain Company U.S. Inc. 401(k) Retirement Plan grew sharply - up 17.8% during 2024, from $310M to $366M. Reported net income was $55M.
How have Alterra Mountain Company plan assets changed over time? ▼
Across 3 plan years on file (2022-2024), Alterra Mountain Company's sponsor-wide assets grew 52.3%, from $240M to $366M.
Where does Alterra Mountain Company U.S. Inc. 401(k) Retirement Plan rank by assets among Form 5500 filers? ▼
Alterra Mountain Company U.S. Inc. 401(k) Retirement Plan ranks in the 96th percentile by end-of-year assets among 123,622 plans that reported assets for plan year 2024 (in the top 5% of all filed plans by assets).
Which 401(k) plans are similar in size to Alterra Mountain Company U.S. Inc. 401(k) Retirement Plan? ▼
Among 401(k) plans in other states, the closest by assets is Joyson Safety Systems 401(k) Plan in MI ($366M, 1,038 participants).
Which 401(k) plans cover a similar participant headcount to Alterra Mountain Company U.S. Inc. 401(k) Retirement Plan? ▼
Among 401(k) plans in other states, the closest by covered participants is The 401(k) Savings and Profit Sharing Plan of S&p Global Inc. and Its Subsidiaries in NY (10,615 participants, $5.7B 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 911616891.

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.