401(k) · DOL Form 5500 · 2023
Mercury Systems, Inc. 401(k) Plan
Data updated 2026-08-11
- $440M
- Total assets
- 2,337
- Participants
- 97th
- Percentile by assets
- $188,480
- Avg per participant
Official DOL plan name: Mercury Employees Retirement Investment Trust · Sponsored by Mercury Systems, Inc. · Massachusetts · Professional & Technical Services
$440M in assets, 2,337 participants
Mercury Systems, Inc.'s Mercury Employees Retirement Investment Trust reported $440M in total assets and 2,337 participants in its 2023 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.
- 97th percentile by assets (of 127,072 plans)
- #19,913 in Professional & Technical Services (20,321 peers)
Coverage in Massachusetts
Mercury Employees Retirement Investment Trust covers 2,337 participants in Massachusetts, 3.5x the typical Massachusetts plan (state average ~659 per filing). Assets: $440M.
- $440M
- total plan assets (2023 EOY)
- 2,337
- covered participants
- 97th
- percentile by assets (of 127,072 plans)
- $188,480
- avg assets per participant
What changed between DOL Form 5500 filings
plan year 2022 → plan year 2023
- Mercury Employees Retirement Investment Trust reported net income rose from -$51M in the plan year 2022 filing to $71M in the plan year 2023 filing.
- Mercury Employees Retirement Investment Trust end-of-year assets rose from $370M in the plan year 2022 filing to $440M in the plan year 2023 filing.
- Mercury Employees Retirement Investment Trust reported participants rose from 2,028 in the plan year 2022 filing to 2,337 in the plan year 2023 filing.
Participants vs Massachusetts filers
In Massachusetts, the average filing covers about 659 participants across 4,265 plans. Mercury Employees Retirement Investment Trust reports 2,337 participants - 3.5x that state average ($440M EOY assets).
Massachusetts filing particulars
| Total Assets (Beginning of Year) | $370M |
|---|---|
| Net Assets (End of Year) | $440M |
| Net Income | $71M |
| Employer EIN | 042741391 |
| Plan Effective Date | 1987-07-01 |
| Filing Status | FILING RECEIVED |
Sponsor Plan History (Mercury Systems, Inc.)
| 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.
Mercury Employees Retirement Investment Trust vs. nearby 401(k) plans in Massachusetts, assets vs. participants
- Fidelity Retirement Savings Plan $28.6B · 62,289
- Liberty Mutual 401(k) Plan $10.6B · 37,052
- Massachusetts Institute of Technology Supplemental 401(k) Plan $6.8B · 14,094
- Boston Scientific Corporation 401(k) Retirement Savings Plan $5.8B · 19,881
- Philips North America 401(k) Plan $5.8B · 19,120
Similar-Sized 401(k) Plans Nationally
401(k) plans in other states closest to Mercury Employees Retirement Investment Trust by total assets, not by location.
- Farm Bureau 401(k) Savings Plan (IA) $441M · 2,107
- Toshiba Tec U.S. Employees' 401(k) Savings Plan (NC) $441M · 3,409
- The Mohegan Retirement and 401(k) Plan (CT) $440M · 6,534
- De Lage Landen Financial Services, Inc. Retirement Savings Plan (PA) $440M · 1,523
Frequently Asked Questions
How did Mercury Employees Retirement Investment Trust assets move in 2023? ▼
How have Mercury Systems, Inc. plan assets changed over time? ▼
Where does Mercury Employees Retirement Investment Trust rank by assets among Form 5500 filers? ▼
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Filing takeaways
Ways to act on Mercury Employees Retirement Investment Trust's numbers.
- By total assets, Mercury Employees Retirement Investment Trust ranks in the top 5% of all filed plans by assets. See the largest plans
- Compare it side-by-side against 3 similar 401(k) plans in Massachusetts. Compare plans
- Mercury Systems, Inc.'s sponsor-wide assets have grown 28.7% since 2022 across 3 plan years on file. More Professional & Technical Services plans