Alterra Mountain 401(k) plan

Alterra Mountain Company, Denver, CO. EIN 91-1616891. Annual reports 2009–2024. Also filed as Intrawest U.S. Holding, Inc.; Intrawest U.S Holding, Inc.; Intrawest U.S. Holdings, Inc.; Alterra Mountain Company U.S. Inc.

Alterra Mountain Company has one active retirement plan on file, the Alterra Mountain Company U.S. Inc. 401(k) Retirement Plan, with 21,293 participants and $366 million in assets in 2024. Fidelity has been its recordkeeper since 2019. No traditional pension plan appears in Alterra Mountain's filings since 2009.

Active plans: 1
Participants: 21,293
Plan assets: $366 million
401(k) recordkeeper: Fidelity
Plans on file: 1
Industry: Arts and recreation

The plan

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

401(k)Active

Active. The plan filed its annual report for the 2024 plan year.

Plan number: 001Employer EIN 91-1616891
Participants (2024): 21,293
Net assets (2024): $366 million
Recordkeeper: FidelityEarlier: Vanguard (2016–2018), Fidelity (2009–2013)
Plan administrator: Alterra Mountain Company
3501 Wazee ST, Suite 400
Denver, CO 80216
(303) 749-8200As filed for 2024
In effect since: June 30, 1978

Plans merged into this one: Mammoth Mountain Ski Area LLC (Delaware LLC) Profit Sharing 401(k) Plan (2018).

Earlier sponsors: Intrawest U.S. Holding, Inc. (2009–2011); Intrawest U.S Holding, Inc. (2012–2015); Intrawest U.S. Holdings, Inc. (2016–2017); Alterra Mountain Company U.S. Inc. (2018–2019).

Earlier plan names: Intrawest 401K Retirement Plan; Intrawest 401 K Retirement Plan; Intrawest 401(k) Retirement Plan.

Year by year, 2009 to 2024

Plan year	Participants	Net assets	Recordkeeper
2024	21,293	$366 million	Fidelity
2023	12,628	$310 million	Fidelity
2022	13,588	$240 million	Fidelity
2021	13,626	$295 million	Fidelity
2020	13,552	$262 million	Fidelity
2019	13,727	$211 million	Fidelity
2018	13,932	$164 million	Vanguard
2017	1,452	$77.3 million	Vanguard
2016	1,447	$68.2 million	Vanguard
2015	4,592	$64.6 million	not listed
2014	4,859	$71.2 million	not listed
2013	5,657	$70.1 million	Fidelity
2012	5,358	$58.9 million	Fidelity
2011	3,189	$54.0 million	Fidelity
2010	3,198	$57.1 million	Fidelity
2009	9,553	$62.9 million	Fidelity

If you had money in one of these plans

Call Fidelity (fidelity.com), which runs the Alterra Mountain Company U.S. Inc. 401(k) Retirement Plan. With your Social Security number and the plan name, it can tell you whether you still have a balance and, if not, where it went.
Or call the plan administrator listed on the plan below ((303) 749-8200). That number was filed for 2024; ask for the benefits or retirement plan office.
Still stuck? The Department of Labor's benefits advisers help for free: askebsa.dol.gov or 1-866-444-3272. Never pay anyone to find your own money.

What these numbers are

They come from the Form 5500 annual reports each plan files with the Department of Labor, as the plan filed them. A plan year is usually a calendar year.
Participants counts everyone in the plan at year end: current employees, former employees who still have a balance or a pension coming, and retirees or beneficiaries being paid.
The recordkeeper is the service provider whose Schedule C entry says it keeps the plan's records. Small plans do not file Schedule C, so some plans show none.
We cannot see anyone's account. Only the plan or its recordkeeper can tell you your balance.

Sources: U.S. Department of Labor, Form 5500 datasets and PBGC trusteed plans. How we read them.

The plan

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

If you had money in one of these plans

What these numbers are

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