Mercury Employees Retirement Investment Trust

What the Filing Says About Mercury Employees Retirement Investment Trust

Mercury Employees Retirement Investment Trust is a 401(k) retirement plan sponsored by Mercury Systems, Inc., headquartered in Massachusetts. As of the 2022 Form 5500 filing, the plan reports $370M in total end-of-year assets and covers 2,028 participants across the Professional & Technical Services industry. The sponsor's EIN on file with the U.S. Department of Labor is 042741391, and the plan has been effective since 1987-07-01. Its filing status is currently FILING RECEIVED.

Year over year, total assets moved from $415M at the beginning of 2022 to $370M at year-end — a decline of 10.8%. Net assets (after liabilities) closed the year at $370M, with reported net income of $-51,353,490 driven by investment returns, contributions received, and benefit payments during the period. These figures reflect what the plan administrator certified on Schedule H or Schedule I of the Form 5500 annual return and can be compared against 2 prior plan-year filings from the same sponsor shown below.

Asset totals and participant counts reflect a single plan year snapshot and can change materially with market conditions, plan mergers, or workforce changes. Fields such as "net income" include both realized investment performance and contribution/distribution flows — a single-year figure does not by itself indicate plan health or participant outcomes. This page summarizes public DOL disclosures for research and educational purposes only and is not retirement, tax, legal, or financial advice. Before making decisions about your own retirement benefits or evaluating an employer's plan, verify the underlying filing directly via the DOL EFAST2 system and consult a qualified professional.