Mersen Usa Holding Corp. 401(k) Plan: Login, Facts & Contact Information

Mersen Usa Holding Corp. 401(k) Plan Facts

Plan name
RETIREMENT SAVINGS PLAN FOR THE EMPLOYEES OF MERSEN USA
Plan type
401(k) with employer contributions and profit sharing
Plan sponsor
MERSEN USA HOLDING CORP.
Participants
1,553 (1,089 active employees)
Former employees with a balance
479
Plan assets
$159,709,959 at Dec 31, 2024
Average account balance
$101,921 across 1,567 accounts
Employer contributions
$5,479,422 in plan year 2024 (38% of all contributions)
Recordkeeper
John Hancock
Plan year
Jan 1, 2024 – Dec 31, 2024
Plan established
Jan 1, 1992
✓ Employer contributions✓ Automatic enrollment✓ Default investment for undecided participants✓ Participants choose their own investments— Self-directed brokerage window✓ Profit sharing— Company stock (ESOP)

Source: Form 5500 for plan year 2024 (Jan 1, 2024 – Dec 31, 2024), filed Aug 26, 2025. Public filing with the U.S. Department of Labor.

Money in and out in plan year 2024

  • $14.6 million went into the plan in contributions, $5.48 million of it from the employer (38%).
  • $13.3 million was paid out to participants.
  • Investment and other income added $18.7 million.
  • Administrative expenses were $398,454, about $254 per account.

How the Mersen Usa Holding Corp. 401(k) changed, 2019–2024

Plan yearParticipantsPlan assetsEmployer contributionsBenefits paid
20191,232$109.6 million$3.94 million$7.61 million
20201,252$120.1 million$4.05 million$13.0 million
20211,242$133.0 million$3.78 million$14.7 million
20221,339$118.3 million$4.48 million$7.53 million
20231,426$140.1 million$4.91 million$9.74 million
20241,553$159.7 million$5.48 million$13.3 million

Mersen Usa Holding Corp. 401(k) Contact Information

Phone
973-334-0700
Mailing address
400 MYRTLE AVE, BOONTON NJ 07005
Plan sponsor
MERSEN USA HOLDING CORP.
Employer identification number (EIN)
22-0807643
Plan number
002

Questions about the Mersen Usa Holding Corp. 401(k)

Does Mersen Usa Holding Corp contribute to the 401(k)?

Yes. The plan reports an employer contribution arrangement. In plan year 2024 the employer contributed $5.48 million, 38% of all contributions.

Does the Mersen Usa Holding Corp 401(k) have automatic enrollment?

Yes. The plan reports automatic enrollment of eligible employees.

How many people are in the Mersen Usa Holding Corp 401(k) plan?

1,553 participants at the start of plan year 2024, 1,089 of them active employees, and 479 former employees who still had money in the plan.

What is the average 401(k) balance at Mersen Usa Holding Corp?

About $101,921 per account: $159.7 million in plan assets across 1,567 accounts with a balance at the end of plan year 2024.

Who manages the Mersen Usa Holding Corp 401(k) accounts?

John Hancock is the plan's recordkeeper, which is where participants log in to see their balance.

I no longer work at Mersen Usa Holding Corp. How do I access my 401(k)?

Your account stays with John Hancock after you leave, so you can log in with the same credentials. If your balance was small, the plan may have rolled it into an IRA in your name. If you can't find it, Beagle can locate it for you.

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