401(k) · DOL Form 5500 · 2022
Mercury Systems, Inc. 401(k) Plan
Data updated 2026-08-25
- $370M
- Total assets Above avg plan size
- 2,028
- Participants Near avg headcount
- 97th
- Percentile by assets National rank
- $182,288
- Avg per participant Above avg balance/head
Official DOL plan name: Mercury Employees Retirement Investment Trust · Sponsored by Mercury Systems, Inc. · Massachusetts · Professional & Technical Services
$370M in assets, 2,028 participants
Mercury Systems, Inc.'s Mercury Employees Retirement Investment Trust reported $370M in total assets and 2,028 participants in its 2022 DOL Form 5500 filing, ranking in the 97th percentile by assets among filed plans. Figures are as reported by the plan sponsor to the Department of Labor, not audited or endorsed by PlainRetire.
- #21,146 in Professional & Technical Services (21,562 peers)
Coverage in Massachusetts
Mercury Employees Retirement Investment Trust covers 2,028 participants in Massachusetts, 3.1x the typical Massachusetts plan (state average ~659 per filing). Assets: $370M.
- #21,146
- in Professional & Technical Services (21,562 peers)
- -10.8%
- assets change YoY
- 3.7×
- vs typical plan assets (national mean)
The plan reported a net loss of $51M for the year, a single-year figure driven by markets and benefit payments, not a measure of plan health.
Mercury Employees Retirement Investment Trust's outsized position by total assets
Mercury Employees Retirement Investment Trust vs every filed plan by assets
End-of-year total assets · plan year 2022 · DOL Form 5500
$369,680,179 Top 3% higher than 97% of 139,123 filed plans
Dashed line + filled bar = this entry, among filed plans.
Source U.S. Department of Labor Form 5500 filings (EBSA) · plan year 2022
Mercury Employees Retirement Investment Trust's large-plan peer group by participant headcount
Plan-year 2022 Form 5500 filings with a reported participant count, partitioned by headcount band, not by assets. Mercury Employees Retirement Investment Trust lands in the large band (2,028 participants).
EBSA filing schedule strip
Filing strip 042741391 · Mercury Systems, Inc. PY 2022 · 401(k)
Mercury Employees Retirement Investment Trust · $370M · 2,028 · 97th
- EBSA $370M
- PART 2,028
- TYPE 97th
- NET 401(k)
- BOOK near American National 401(k) Plan
- VS-ST ind #21146
Stamps derive from this plan's Form 5500 line items (assets, participants, type, EIN, cohort placement) - not a quality rating of the sponsor. Read with Professional & Technical Services retirement plans → · Plans in Massachusetts →
Mercury Employees Retirement Investment Trust in the asset neighbourhood
Massachusetts filing particulars
| Total Assets (Beginning of Year) | $415M |
|---|---|
| Net Assets (End of Year) | $370M |
| Net Income | -$51M |
| Employer EIN | 042741391 |
| Plan Effective Date | 1987-07-01 |
| Filing Status | FILING RECEIVED |
Sponsor Plan History (Mercury Systems, Inc.)
Sponsor-wide plan assets over time
All Mercury Systems, Inc. plans reported in each filing year
- Latest sponsor-wide plan assets
- $476M 28.65889058120154% vs 2022
- 2024 filing year
| Year | Plans | Participants | Total Assets |
|---|---|---|---|
| 2022 | 1 | 2,028 | $370M |
| 2023 | 1 | 2,337 | $440M |
| 2024 | 1 | 2,388 | $476M |
Nearby 401(k) Plans in Massachusetts
Peer 401(k) plans, same state, same plan type, ranked by total assets.
- Fidelity Retirement Savings Plan $23.0B · 52,036
- Liberty Mutual 401(k) Plan $8.8B · 32,843
- Massachusetts Institute of Technology Supplemental 401(k) Plan $5.8B · 13,690
- Philips North America 401(k) Plan $5.2B · 19,750
- Boston Scientific Corporation 401(k) Retirement Savings Plan $4.9B · 18,359
Mercury Employees Retirement Investment Trust's out-of-state 401(k) peers by assets and headcount
Outside Massachusetts, the nearest 401(k) by assets is American National 401(k) Plan in TX ($370M); by covered participants it is Jack Cooper 401(k) Plan in MO (2,028 participants). Same-state nearby plans are listed separately above.
Closest by plan assets
Nearest other-state filings by tot_assets_eoy ($370M here).
- American National 401(k) Plan (TX) $370M · 4,550
- Hallmark Affiliates Employee Savings Plan (MO) $370M · 2,604
- Firmenich Retirement Savings Plan (NJ) $369M · 1,488
- R1 Rcm Inc. 401(k) Plan (UT) $369M · 10,832
Similar participant headcount
Nearest other-state filings by covered participants (2,028 participants); asset peers above are excluded.
- Jack Cooper 401(k) Plan (MO) 2,028 · 0 off
- Congruity Hr Retirement Savings Plan (NC) 2,028 · 0 off
- Ellucian Retirement Plan (VA) 2,029 · 1 off
- Terumo Bct, Inc. 401(k) Plan (CO) 2,029 · 1 off
DOL Form 5500 plan year 2022. Asset totals can differ widely at the same headcount; neither axis is a quality rating.