The Middlesex Corporation
Littleton, MA, 01460
- Plans
- 2
- Total participants
- 8,531
- Filing years
- 2024, 2023, 2022, 2021, 2020
- NAICS
- 237310
Benefit plans on file
| Year | Form | Plan # | Plan name | Participants |
|---|---|---|---|---|
| 2024 | Form 5500 | 001 | Middlesex Corporation Retirement Savings Plan | 887 |
| 2024 | Form 5500 | 501 | The Middlesex Corporation Employee Benefits Plan | 783 |
| 2023 | Form 5500 | 001 | Middlesex Corporation Retirement Savings Plan | 810 |
| 2023 | Form 5500 | 501 | The Middlesex Corporation Employee Benefits Plan | 769 |
| 2022 | Form 5500 | 001 | The Middlesex Corporation Retirement Savings Plan | 772 |
| 2022 | Form 5500 | 501 | The Middlesex Corporation Employee Benefits Plan | 903 |
| 2021 | Form 5500 | 001 | The Middlesex Corporation Retirement Savings Plan | 868 |
| 2021 | Form 5500 | 501 | The Middlesex Corporation Employee Benefits Plan | 903 |
| 2020 | Form 5500 | 001 | The Middlesex Corporation Retirement Savings Plan | 957 |
| 2020 | Form 5500 | 501 | The Middlesex Corporation Employee Benefits Plan | 879 |
Data shown as filed with the U.S. Department of Labor (EBSA), filing years 2020–2025; not validated by OpenERISA. View official filings for this EIN on the DOL EFAST2 search.
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