Plexus 401(k) plan

Plexus Corp., Neenah, WI. EIN 39-1344447. Annual reports 2009–2025.

Plexus Corp. has one active retirement plan on file, the Plexus Corp. 401(k) Retirement Plan, with 4,306 participants and $668 million in assets in 2025. T. Rowe Price has been its recordkeeper since 2019. No traditional pension plan appears in Plexus's filings since 2009.

Active plans: 1
Participants: 4,306
Plan assets: $668 million
401(k) recordkeeper: T. Rowe Price
Plans on file: 1
Industry: Holding companies

The plan

Plexus Corp. 401(k) Retirement Plan

401(k)Active

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

Plan number: 001Employer EIN 39-1344447
Participants (2025): 4,306
Net assets (2025): $668 million
Recordkeeper: T. Rowe PriceEarlier: MassMutual (2013–2018), Hartford Retirement Services (2009–2012)
Plan administrator: Plexus Corp.
One Plexus Way
Neenah, WI 54956
(920) 969-6000As filed for 2025
In effect since: January 1, 1989

Earlier plan names: Plexus Corp. 401(k) Savings Plan.

Year by year, 2009 to 2025

Plan year	Participants	Net assets	Recordkeeper
2025	4,306	$668 million	T. Rowe Price
2024	4,328	$606 million	T. Rowe Price
2023	4,827	$543 million	T. Rowe Price
2022	4,856	$463 million	T. Rowe Price
2021	4,850	$550 million	T. Rowe Price
2020	5,086	$480 million	T. Rowe Price
2019	5,290	$419 million	T. Rowe Price
2018	4,752	$332 million	MassMutual
2017	4,375	$352 million	MassMutual
2016	4,298	$295 million	MassMutual
2015	4,629	$263 million	MassMutual
2014	4,336	$261 million	MassMutual
2013	3,893	$245 million	MassMutual
2012	3,832	$199 million	Hartford Retirement Services
2011	3,996	$173 million	Hartford Retirement Services
2010	3,954	$172 million	Hartford Retirement Services
2009	3,785	$143 million	Hartford Retirement Services

If you had money in one of these plans

Call T. Rowe Price (troweprice.com), which runs the Plexus Corp. 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 ((920) 969-6000). 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

Plexus Corp. 401(k) Retirement Plan

If you had money in one of these plans

What these numbers are

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