CSLB Holdings 401(k) and retirement plans

CSLB Holdings Inc., King of Prussia, PA. EIN 80-0120293. Annual reports 2009–2024. Also filed as CSL Behring LLC; Seqirus, Inc.

CSLB Holdings Inc. has one active retirement plan on file, the CSLB Holdings Inc. 401(k) Plan, with 22,017 participants and $1.2 billion in assets in 2024. Fidelity has been its recordkeeper since 2009. No traditional pension plan appears in CSLB Holdings's filings since 2009.

Active plans: 1
Participants: 22,017
Plan assets: $1.2 billion
401(k) recordkeeper: Fidelity
Plans on file: 2
Industry: Manufacturing

All 2 plans

Active plans first

CSLB Holdings Inc. 401(k) Plan

401(k)Active

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

Plan number: 001Employer EIN 80-0120293
Participants (2024): 22,017
Net assets (2024): $1.2 billion
Recordkeeper: Fidelity2009–2024
Plan administrator: CSLB Holdings Inc.
1020 First Ave
King of Prussia, PA 19406
(610) 878-4000As filed for 2024
In effect since: January 17, 2005

Plans merged into this one: Seqirus, Inc. Investment Savings Plan (2021).

Earlier sponsor: CSL Behring LLC (2009).

Earlier plan names: CSLB Holdings Inc 401(k) Plan; CSLB Holdings INC.401(k) Plan.

Year by year, 2009 to 2024

Plan year	Participants	Net assets	Recordkeeper
2024	22,017	$1.2 billion	Fidelity
2023	21,447	$1.0 billion	Fidelity
2022	24,609	$785 million	Fidelity
2021	19,469	$748 million	Fidelity
2020	16,148	$652 million	Fidelity
2019	15,776	$550 million	Fidelity
2018	14,225	$422 million	Fidelity
2017	11,985	$413 million	Fidelity
2016	9,946	$339 million	Fidelity
2015	9,384	$306 million	Fidelity
2014	8,953	$296 million	Fidelity
2013	7,605	$275 million	Fidelity
2012	6,732	$222 million	Fidelity
2011	6,714	$193 million	Fidelity
2010	6,157	$185 million	Fidelity
2009	6,265	$158 million	Fidelity

Seqirus, Inc. Investment Savings Plan

401(k)Merged

Merged. In 2021 its assets moved to the CSLB Holdings Inc. 401(k) Plan, sponsored by CSLB Holdings Inc. (EIN 80-0120293, plan 001). Accounts moved with them, so that plan is the one to contact.

Plan number: 001Employer EIN 47-4197300
Participants (2020): 1,179
Net assets (2020): $90.1 million
Recordkeeper: Fidelity2016–2021
Plan administrator: CSLB Holdings Inc.
1020 First Ave
King of Prussia, PA 19406
(919) 577-5213As filed for 2021
In effect since: March 1, 2016

Earlier sponsor: Seqirus, Inc. (2016–2019).

Year by year, 2016 to 2021

Plan year	Participants	Net assets	Recordkeeper
2021	0	$0	Fidelity
2020	1,179	$90.1 million	Fidelity
2019	1,072	$62.0 million	Fidelity
2018	912	$36.2 million	Fidelity
2017	824	$26.4 million	Fidelity
2016	690	$11.2 million	Fidelity

If you had money in one of these plans

Call Fidelity (fidelity.com), which runs the CSLB Holdings Inc. 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 ((610) 878-4000). That number was filed for 2024; ask for the benefits or retirement plan office.
If your plan was merged, your account moved with it. Follow the link on the plan to the plan it went into, and contact that one.
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.

All 2 plans

CSLB Holdings Inc. 401(k) Plan

Seqirus, Inc. Investment Savings Plan

If you had money in one of these plans

What these numbers are

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