Mission Support And Test Services Llc 401(k) Plan: Login, Facts & Contact Information

Mission Support And Test Services Llc 401(k) Plan Facts

Plan name
MISSION SUPPORT AND TEST SERVICES LLC (MSTS) EMPLOYEE 401(K) PLAN
Plan type
401(k) with employer contributions and profit sharing
Plan sponsor
MISSION SUPPORT AND TEST SERVICES LLC
Participants
3,113 (2,485 active employees)
Former employees with a balance
579
Plan assets
$611,933,756 at Dec 31, 2024
Average account balance
$202,092 across 3,028 accounts
Employer contributions
$8,395,115 in plan year 2024 (20% of all contributions)
Recordkeeper
Fidelity Investments Institutional
Plan year
Jan 1, 2024 – Dec 31, 2024
Plan established
Jul 1, 1972
✓ 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 7, 2025. Public filing with the U.S. Department of Labor.

Money in and out in plan year 2024

  • $42.1 million went into the plan in contributions, $8.40 million of it from the employer (20%).
  • $66.6 million was paid out to participants.
  • Investment and other income added $106.7 million.
  • Administrative expenses were $409,764, about $135 per account.

How the Mission Support And Test Services Llc 401(k) changed, 2019–2024

Plan yearParticipantsPlan assetsEmployer contributionsBenefits paid
20192,356$396.5 million$5.20 million$35.0 million
20202,518$484.1 million$5.45 million$36.7 million
20212,521$539.0 million$5.81 million$50.9 million
20222,636$427.4 million$6.30 million$37.1 million
20232,748$530.2 million$7.38 million$36.4 million
20243,113$611.9 million$8.40 million$66.6 million

Mission Support And Test Services Llc 401(k) Contact Information

Phone
702-295-4377
Mailing address
PO BOX 98521 M/S NLV010, LAS VEGAS NV 891938521
Plan sponsor
MISSION SUPPORT AND TEST SERVICES LLC
Employer identification number (EIN)
81-0705502
Plan number
002

Questions about the Mission Support And Test Services Llc 401(k)

Does Mission Support And Test Services Llc contribute to the 401(k)?

Yes. The plan reports an employer contribution arrangement. In plan year 2024 the employer contributed $8.40 million, 20% of all contributions.

Does the Mission Support And Test Services Llc 401(k) have automatic enrollment?

Yes. The plan reports automatic enrollment of eligible employees.

How many people are in the Mission Support And Test Services Llc 401(k) plan?

3,113 participants at the start of plan year 2024, 2,485 of them active employees, and 579 former employees who still had money in the plan.

What is the average 401(k) balance at Mission Support And Test Services Llc?

About $202,092 per account: $611.9 million in plan assets across 3,028 accounts with a balance at the end of plan year 2024.

Who manages the Mission Support And Test Services Llc 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 Mission Support And Test Services Llc. 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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