Consolidated Nuclear Security, Llc 401(k) Plan: Login, Facts & Contact Information

Consolidated Nuclear Security, Llc 401(k) Plan Facts

Plan name
SAVINGS PROGRAM FOR EMPLOYEES OF CONSOLIDATED NUCLEAR SECURITY, LLC AT THE U.S. DEPARTMENT OF ENERGY FACILITIES AT OAK RIDGE, TENNESSEE
Plan type
401(k) with employer contributions
Plan sponsor
CONSOLIDATED NUCLEAR SECURITY, LLC
Participants
8,291 (6,816 active employees)
Former employees with a balance
1,480
Plan assets
$1,492,265,240 at Dec 31, 2024
Average account balance
$182,050 across 8,197 accounts
Employer contributions
$43,924,140 in plan year 2024 (35% of all contributions)
Recordkeeper
Voya Holdings, Inc.
Plan year
Jan 1, 2024 – Dec 31, 2024
Plan established
Nov 1, 2000
✓ 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 14, 2025. Public filing with the U.S. Department of Labor.

Money in and out in plan year 2024

  • $124.0 million went into the plan in contributions, $43.9 million of it from the employer (35%).
  • $95.3 million was paid out to participants.
  • Investment and other income added $162.4 million.
  • Administrative expenses were $1.00 million, about $122 per account.

How the Consolidated Nuclear Security, Llc 401(k) changed, 2019–2024

Plan yearParticipantsPlan assetsEmployer contributionsBenefits paid
20196,147$984.3 million$21.4 million$62.4 million
20206,463$1.12 billion$23.9 million$60.5 million
20216,709$1.24 billion$28.2 million$91.0 million
20227,154$1.09 billion$32.7 million$79.2 million
20237,692$1.30 billion$38.7 million$73.2 million
20248,291$1.49 billion$43.9 million$95.3 million

Consolidated Nuclear Security, Llc 401(k) Contact Information

Phone
865-574-1500
Mailing address
P.O. BOX 2115, OAK RIDGE TN 378318258
Plan sponsor
CONSOLIDATED NUCLEAR SECURITY, LLC
Employer identification number (EIN)
45-4482782
Plan number
009

Questions about the Consolidated Nuclear Security, Llc 401(k)

Does Consolidated Nuclear Security, Llc contribute to the 401(k)?

Yes. The plan reports an employer contribution arrangement. In plan year 2024 the employer contributed $43.9 million, 35% of all contributions.

Does the Consolidated Nuclear Security, Llc 401(k) have automatic enrollment?

Yes. The plan reports automatic enrollment of eligible employees.

How many people are in the Consolidated Nuclear Security, Llc 401(k) plan?

8,291 participants at the start of plan year 2024, 6,816 of them active employees, and 1,480 former employees who still had money in the plan.

What is the average 401(k) balance at Consolidated Nuclear Security, Llc?

About $182,050 per account: $1.49 billion in plan assets across 8,197 accounts with a balance at the end of plan year 2024.

Who manages the Consolidated Nuclear Security, Llc 401(k) accounts?

Voya Financial (listed on the filing as VOYA HOLDINGS, INC.) is the plan's recordkeeper, which is where participants log in to see their balance.

I no longer work at Consolidated Nuclear Security, Llc. How do I access my 401(k)?

Your account stays with Voya Financial 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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