Century Aluminum Company 401(k) Plan: Login, Facts & Contact Information

Century Aluminum Company 401(k) Plan Facts

Plan name
CENTURY ALUMINUM 401(K) PLAN
Plan type
401(k) with employer contributions and profit sharing
Plan sponsor
CENTURY ALUMINUM COMPANY
Participants
1,957 (1,434 active employees)
Former employees with a balance
382
Plan assets
$149,714,420 at Dec 31, 2024
Average account balance
$106,634 across 1,404 accounts
Employer contributions
$6,169,170 in plan year 2024 (42% of all contributions)
Recordkeeper
T Rowe Price Rps Inc
Plan year
Jan 1, 2024 – Dec 31, 2024
Plan established
Jun 1, 1989
✓ 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 Oct 13, 2025. Public filing with the U.S. Department of Labor.

Money in and out in plan year 2024

  • $14.8 million went into the plan in contributions, $6.17 million of it from the employer (42%).
  • $15.7 million was paid out to participants.
  • Investment and other income added $17.2 million.
  • Administrative expenses were $69,828, about $50 per account.

How the Century Aluminum Company 401(k) changed, 2019–2024

Plan yearParticipantsPlan assetsEmployer contributionsBenefits paid
20191,997$113.2 million$4.84 million$12.3 million
20202,026$128.5 million$4.91 million$17.1 million
20212,014$143.8 million$5.30 million$14.4 million
20222,414$115.8 million$6.05 million$16.7 million
20232,022$133.5 million$5.74 million$16.3 million
20241,957$149.7 million$6.17 million$15.7 million

Century Aluminum Company 401(k) Contact Information

Phone
270-852-2221
Mailing address
1 SOUTH WACKER DRIVE, SUITE 1000, CHICAGO IL 60606
Plan sponsor
CENTURY ALUMINUM COMPANY
Employer identification number (EIN)
13-3070826
Plan number
004

Questions about the Century Aluminum Company 401(k)

Does Century Aluminum Company contribute to the 401(k)?

Yes. The plan reports an employer contribution arrangement. In plan year 2024 the employer contributed $6.17 million, 42% of all contributions.

Does the Century Aluminum Company 401(k) have automatic enrollment?

Yes. The plan reports automatic enrollment of eligible employees.

How many people are in the Century Aluminum Company 401(k) plan?

1,957 participants at the start of plan year 2024, 1,434 of them active employees, and 382 former employees who still had money in the plan.

What is the average 401(k) balance at Century Aluminum Company?

About $106,634 per account: $149.7 million in plan assets across 1,404 accounts with a balance at the end of plan year 2024.

Who manages the Century Aluminum Company 401(k) accounts?

T. Rowe Price (listed on the filing as T ROWE PRICE RPS INC) is the plan's recordkeeper, which is where participants log in to see their balance.

I no longer work at Century Aluminum Company. How do I access my 401(k)?

Your account stays with T. Rowe Price 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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