Lantheus Medical Imaging, Inc. 401(k) Plan: Login, Facts & Contact Information

Lantheus Medical Imaging, Inc. 401(k) Plan Facts

Plan name
LANTHEUS MEDICAL IMAGING, INC. RETIREMENT SAVINGS PLAN
Plan type
401(k) with employer contributions and profit sharing
Plan sponsor
LANTHEUS MEDICAL IMAGING, INC.
Participants
1,100 (799 active employees)
Former employees with a balance
356
Plan assets
$147,446,452 at Dec 31, 2024
Average account balance
$131,064 across 1,125 accounts
Employer contributions
$5,924,906 in plan year 2024 (25% of all contributions)
Recordkeeper
Fidelity Investments Institutional
Plan year
Jan 1, 2024 – Dec 31, 2024
Plan established
Jan 8, 2008
✓ 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

  • $24.0 million went into the plan in contributions, $5.92 million of it from the employer (25%).
  • $16.7 million was paid out to participants.
  • Investment and other income added $17.1 million.

How the Lantheus Medical Imaging, Inc. 401(k) changed, 2019–2024

Plan yearParticipantsPlan assetsEmployer contributionsBenefits paid
2019599$73.9 million$2.00 million$8.15 million
2020639$86.5 million$971,584$6.35 million
2021652$113.9 million$2.55 million$14.3 million
2022874$96.0 million$3.22 million$12.7 million
2023897$123.0 million$4.25 million$9.99 million
20241,100$147.4 million$5.92 million$16.7 million

Lantheus Medical Imaging, Inc. 401(k) Contact Information

Phone
978-671-8870
Mailing address
331 TREBLE COVE RD., NORTH BILLERICA MA 01862
Plan sponsor
LANTHEUS MEDICAL IMAGING, INC.
Employer identification number (EIN)
51-0396366
Plan number
001

Questions about the Lantheus Medical Imaging, Inc. 401(k)

Does Lantheus Medical Imaging, Inc contribute to the 401(k)?

Yes. The plan reports an employer contribution arrangement. In plan year 2024 the employer contributed $5.92 million, 25% of all contributions.

Does the Lantheus Medical Imaging, Inc 401(k) have automatic enrollment?

Yes. The plan reports automatic enrollment of eligible employees.

How many people are in the Lantheus Medical Imaging, Inc 401(k) plan?

1,100 participants at the start of plan year 2024, 799 of them active employees, and 356 former employees who still had money in the plan.

What is the average 401(k) balance at Lantheus Medical Imaging, Inc?

About $131,064 per account: $147.4 million in plan assets across 1,125 accounts with a balance at the end of plan year 2024.

Who manages the Lantheus Medical Imaging, Inc 401(k) accounts?

Fidelity NetBenefits (listed on the filing as FIDELITY INVESTMENTS INSTITUTIONAL) is the plan's recordkeeper, which is where participants log in to see their balance.

I no longer work at Lantheus Medical Imaging, Inc. How do I access my 401(k)?

Your account stays with Fidelity NetBenefits 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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