EntityWire/Massachusetts business entity search →/MIDDLESEX SCHOOL
Tax-exempt organization
MIDDLESEX SCHOOL
MIDDLESEX SCHOOL's Employer Identification Number (EIN) is 04-2103821.
At a glance
- EIN
- 04-2103821 · 042103821
- Legal name
- MIDDLESEX SCHOOL
- Address on file
- PO BOX 9122, CONCORD, MA 01742-9122
- Records show
- Tax-exempt organization; employer with a benefit plan
- Latest record
- 2026-09
Benefit plans
DOL Form 5500 filings (EFAST2) · records as of 2026-06-11
- Benefit plan 3, 2024 filing
- MIDDLESEX SCHOOL SAVINGS PLAN
- Source: DOL 5500 · as of 2026-06-11
- Participants (start of year)
- 299
- Source: DOL 5500 · as of 2026-06-11
- Plan features
- 403(b)(7) custodial
- Source: DOL 5500 · as of 2026-06-11
- Plan type
- Single-employer plan
- Source: DOL 5500 · as of 2026-06-11
- Business code (NAICS)
- 611000
- Source: DOL 5500 · as of 2026-06-11
- Benefit plan 5, 2024 filing
- MIDDLESEX SCHOOL PENSION ACCOUNT
- Source: DOL 5500 · as of 2026-06-11
IRS exempt organization record
IRS Exempt Organizations Business Master File · records as of 2026-09
- Tax-exempt status
- 501(c)(3) charitable, religious, educational
- Source: IRS · as of 2026-09
- Deductibility
- Contributions are deductible
- Source: IRS · as of 2026-09
- Foundation classification
- School
- Source: IRS · as of 2026-09
- IRS ruling date
- 1944-02
- Source: IRS · as of 2026-09
- NTEE code
- B250
- Source: IRS · as of 2026-09
- Latest tax period on file
- 2025-06
- Source: IRS · as of 2026-09
- Revenue (latest 990)
- $59,021,357
- Source: IRS · as of 2026-09
- Assets (latest 990)
- $556,036,805
- Source: IRS · as of 2026-09
What this record is
Public filings that carry this EIN (DOL Form 5500 filings (EFAST2), DOL Form 5500-SF filings (EFAST2) and IRS Exempt Organizations Business Master File), shown as filed. Nothing is scraped from the IRS, and a public-record match is not IRS TIN validation.
What it is not
Registry status, formation date, and registered agent come from the Secretary of the Commonwealth, Corporations Division; see the Massachusetts business entity search.
If something is wrong
A name, address, or classification here is what the source published. To correct the source, file with it; to have this page removed, see corrections and removal.
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