Find an old Mersen USA Holding 401(k)
Retirement Savings Plan for the Employees of Mersen USA
Mersen USA Holding Corp. · Plan 002 · EIN 22-0807643 · Boonton, NJ
| Plan administrator | Mersen USA Holding Corp. 400 Myrtle Ave, Boonton, NJ 07005 | Form 5500 ↗ |
| Recordkeeper (who holds the accounts) | John Hancock | Schedule C ↗ |
| Former employees with balances | 394 separated participants still had money in the plan | Form 5500 ↗ |
Retirement Plan for Hourly Employees of Mersen USA
Mersen USA Holding Corp. · Plan 005 · EIN 22-0807643 · Boonton, NJ
| Plan administrator | Mersen USA Holding Corp. 400 Myrtle Ave, Boonton, NJ 07005 | Form 5500 ↗ |
| Recordkeeper (who holds the accounts) | John Hancock | Schedule C ↗ |
| Former employees with balances | 168 separated participants still had money in the plan | Form 5500 ↗ |
Retirement Plan for Salaried Employees of Mersen USA
Mersen USA Holding Corp. · Plan 004 · EIN 22-0807643 · Boonton, NJ
| Plan administrator | Mersen USA Holding Corp. 400 Myrtle Ave, Boonton, NJ 07005 | Form 5500 ↗ |
| Recordkeeper (who holds the accounts) | John Hancock | Schedule C ↗ |
| Former employees with balances | 133 separated participants still had money in the plan | Form 5500 ↗ |
Mersen USA Holding 401(k) match, vesting and fees →
Found it? Your options
| Leave it | Often allowed if your balance is over $7,000. You keep the plan's investments and fees. |
| Move it to your new job's plan | If the new plan accepts roll-ins. Ask the new plan's recordkeeper. |
| Roll it into an IRA | More investment choices, and you control it. A direct rollover avoids withholding and penalties. |
| Cash out | Usually taxed, plus a 10% penalty if you are under 59½. |
General information, not financial or tax advice. Rules depend on your plan and situation.
How to track down the account
- Call the plan administrator or recordkeeper listed on the filing. Have your name, Social Security number and dates of employment ready.
- If the plan terminated, ask the administrator where balances went (another plan, an IRA provider, or a state unclaimed-property office).
- Over 65? Also check the Department of Labor's Retirement Savings Lost and Found database.
Common questions
How do I find my old Mersen USA Holding 401(k)?
Contact the plan administrator listed on the plan's Form 5500 filing: Mersen USA Holding Corp., (973) 334-0700. The accounts are held by the recordkeeper, John Hancock. Have your Social Security number and dates of employment ready.
What is the Mersen USA Holding 401(k) phone number?
The plan administrator phone number on the plan year 2025 filing is (973) 334-0700.
Contacts are as filed on each plan's latest Form 5500 and may be out of date. PlanFacts is not affiliated with Mersen USA Holding and does not hold accounts. Not financial advice. Report a correction