401(k) · DOL Form 5500 · 2023

Alterra Mountain Company 401(k) Plan

Data updated 2026-08-25

$310M
Total assets Above avg plan size
11,850
Participants Very large workforce
96th
Percentile by assets National rank
$26,197
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

$310M in assets, 11,850 participants

Alterra Mountain Company's Alterra Mountain Company U.S. Inc. 401(k) Retirement Plan reported $310M in total assets and 11,850 participants in its 2023 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.

  • #2,905 in Arts, Entertainment & Recreation (2,945 peers)

Coverage in Colorado

Alterra Mountain Company U.S. Inc. 401(k) Retirement Plan covers 11,850 participants in Colorado, 32x the typical Colorado plan (state average ~376 per filing). Assets: $310M.

#2,905
in Arts, Entertainment & Recreation (2,945 peers)
+29.3%
assets growth YoY
3.1×
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 2023 · DOL Form 5500

$310,432,411 Top 4% higher than 96% 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

Alterra Mountain Company U.S. Inc. 401(k) Retirement 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. Alterra Mountain Company U.S. Inc. 401(k) Retirement Plan is a mega filing (11,850 participants), the rightmost band on the breakdown.

What changed between DOL Form 5500 filings

plan year 2022 → plan year 2023

  • Alterra Mountain Company U.S. Inc. 401(k) Retirement Plan reported net income rose from -$55M in the plan year 2022 filing to $70M in the plan year 2023 filing.
  • Alterra Mountain Company U.S. Inc. 401(k) Retirement Plan end-of-year assets rose from $240M in the plan year 2022 filing to $310M in the plan year 2023 filing.
  • Alterra Mountain Company U.S. Inc. 401(k) Retirement Plan reported participants fell from 12,118 in the plan year 2022 filing to 11,850 in the plan year 2023 filing.

See the national 2022→2023 release diff →

Form 5500 schedule snapshot

Filing strip 911616891 · Alterra Mountain Company PY 2023 · 401(k)

Alterra Mountain Company U.S. Inc. 401(k) Retirement Plan · $310M · 11,850 · 96th

  • PHOTO $310M
  • IND 11,850
  • EOY 96th
  • 5500 401(k)
  • ASSETS near Retirement Plan of Sullivan & Cromwell LLP
  • PCT ind #2905

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

Map Communications Holdings, Inc. 401(k) Employees' Stock Ownership PlanMap Communications Holdings,…$311MNutanix, Inc. 401(k) Plan$311MRetirement Plan of Sullivan & Cromwell LLPRetirement Plan of Sullivan …$311MAlterra Mountain Company U.S. Inc. 401(k) Retirement PlanAlterra Mountain Company U.S…$310MDominion Enterprises 401(k) Employees' Savings PlanDominion Enterprises 401(k) …$310M
End-of-year total assets ($M) among Alterra Mountain Company U.S. Inc. 401(k) Retirement Plan and nearest nationwide 401(k) peers. Source: DOL Form 5500 plan year 2023.

Colorado filing particulars

Total Assets (Beginning of Year)$240M
Net Assets (End of Year)$310M
Net Income$70M
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): 0.310432411 · Participants: 11850Alterra Mountain Company U.S. Inc. 401(k) Retirement PlanDavita Retirement Savings Plan, Total assets ($B): 3.326219779 · Participants: 57711Davita Retirement Savings PlanBall Corporation 401(k) and Employee Stock Ownership Plan, Total assets ($B): 2.806549522 · Participants: 10349Ball Corporation 401(k) and Employee Stock Ownership PlanEmpower Retirement, LLC 401(k) Savings Plan, Total assets ($B): 1.852270164 · Participants: 10036Empower Retirement, LLC 401(k) Savings PlanWoodward Retirement Savings Plan, Total assets ($B): 1.765770435 · Participants: 5847Woodward Retirement Savings PlanArcadis U.S., Inc. Retirement Savings Plan, Total assets ($B): 1.686655183 · Participants: 5491Arcadis U.S., Inc. 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 $310M in end-of-year assets across 11,850 participants (0.003% of the $12.3T held by all Form 5500 filers in the national rollup , and 0.013% of 93,925,755 covered participants) - about $26,197 per participant (19% of the national average assets-per-participant) . Net income for plan year 2023 was $70M.

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 This page
2024 · index core 10,620 $366M Open filing

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

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 Retirement Plan of Sullivan & Cromwell LLP in NY ($311M); by covered participants it is Gsk 401(k) Plan in PA (11,837 participants). Same-state nearby plans are listed separately above.

Similar participant headcount

Nearest other-state filings by covered participants (11,850 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 Alterra Mountain Company U.S. Inc. 401(k) Retirement Plan assets move in 2023? ▼
Alterra Mountain Company U.S. Inc. 401(k) Retirement Plan grew sharply - up 29.3% during 2023, from $240M to $310M. Reported net income was $70M.
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 127,072 plans that reported assets for plan year 2023 (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 Retirement Plan of Sullivan & Cromwell LLP in NY ($311M, 185 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 Gsk 401(k) Plan in PA (11,837 participants, $8.1B 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 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.