Williams Scotsman 401(k) plan

Williams Scotsman, Inc., Scottsdale, AZ. EIN 52-0665775. Annual reports 2009–2025. Also filed as Willscot Mobile Mini Holdings Corp.; Willscot Mobile Mini Holdings Corp.

Williams Scotsman, Inc. has one active retirement plan on file, the Willscot 401(k) Plan, with 5,628 participants and $335 million in assets in 2025. Fidelity has been its recordkeeper since 2009. No traditional pension plan appears in Williams Scotsman's filings since 2009.

Active plans: 1
Participants: 5,628
Plan assets: $335 million
401(k) recordkeeper: Fidelity
Plans on file: 1
Industry: Real estate

The plan

Willscot 401(k) Plan

401(k)Active

Active. The plan filed its annual report for the 2025 plan year.

Plan number: 002Employer EIN 52-0665775
Participants (2025): 5,628
Net assets (2025): $335 million
Recordkeeper: Fidelity2009–2025
Plan administrator: Williams Scotsman, Inc.
6400 East Mcdowell Road, Suite 300
Scottsdale, AZ 85257
(480) 404-0579As filed for 2025
In effect since: January 1, 1993

Plans merged into this one: Target Logistics Management, LLC 401(k) Plan (2014); Mobile Mini, Inc. Profit Sharing Plan and Trust (2020).

Earlier sponsor: Willscot Mobile Mini Holdings Corp. (2021–2023).

Earlier plan names: Williams Scotsman, Inc 401(k) Plan; Williams Scotsman, Inc. 401(k) Plan; Willscot Mobile Mini 401(k) Plan.

Year by year, 2009 to 2025

Plan year	Participants	Net assets	Recordkeeper
2025	5,628	$335 million	Fidelity
2024	5,493	$285 million	Fidelity
2023	5,846	$246 million	Fidelity
2022	5,535	$198 million	Fidelity
2021	4,451	$218 million	Fidelity
2020	2,996	$139 million	Fidelity
2019	3,097	$124 million	Fidelity
2018	2,287	$62.2 million	Fidelity
2017	2,090	$65.5 million	Fidelity
2016	1,797	$52.6 million	Fidelity
2015	1,858	$47.0 million	Fidelity
2014	1,817	$46.1 million	Fidelity
2013	1,362	$41.5 million	Fidelity
2012	1,323	$35.3 million	Fidelity
2011	1,292	$30.8 million	Fidelity
2009	1,576	$29.4 million	Fidelity

If you had money in one of these plans

Call Fidelity (fidelity.com), which runs the Willscot 401(k) 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 ((480) 404-0579). That number was filed for 2025; 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

Willscot 401(k) Plan

If you had money in one of these plans

What these numbers are

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