Public Charity

THE SLATE SCHOOL INC

THE SLATE SCHOOL INC, of NORTH HAVEN, CT, is a Public Charity tracked in Imperigo's IRS 990 database. The 2025 filing shows $4.4M in revenue, $2.7M in expenses, $38.9M in total assets. 5 publicly reported grants to this organization, totaling roughly $290K, appear in IRS filings.

EIN: 815374114 NORTH HAVEN, CT Elementary & Secondary Schools NTEE: B20 Latest filing: 2025
Total Revenue$4.4M
Total Expenses$2.7M
Total Assets$38.9M
Grant Records5
Funding Total$290K
Filing Years2021–2025

Mission

THE SLATE SCHOOL, INC. IS DESIGNED TO CULTIVATE STUDENT CREATIVITY, FOSTER INGENUITY, AND INSPIRE A DEEP PASSION FOR LIFELONG LEARNING AND DISCOVERY. THE ORGANIZATIONS MISSION AND PRIORITY IS THAT EACH CHILD'S INNATE AND NATURAL LOVE FOR LEARNING BE NURTURED AND ENABLED TO GROW AND FLOURISH.

Where $100 goes at The Slate School Inc

How The Slate School Inc divides every $100 it spends, from its own Form 990 filings, averaged across 8 years.

$87 Programs the work itself
$13 Management running the organization
$0 Fundraising none reported

No fundraising costs are reported. That often means fundraising runs through a separate affiliated organization that files its own return.

Inside the $87 for programs

$87
Upper school development and construction
All program spending
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Source: Form 990 filings with the IRS, latest fiscal year 2025. Shares are from the organization's reported expenses. Data by Imperigo; not affiliated with the IRS.

Officers & Directors

TREASURER/SECRETARY Alexander Clark
PRESIDENT Jennifer Staple-Clark
HEAD OF SCHOOL Julie Mountcastle
DIRECTOR Paul Ellingstad
DIRECTOR Wendy Ostroff

Officer compensation and complete director data available with membership.

Top Grant Purposes

General Support
$290,000 3 grants

Financial Trends

Year Revenue Expenses Assets
2025 $4.4M $2.7M $38.9M
2024 $11.0M $1.8M $38.2M
2023 $11.6M $1.4M $29.5M
2022 $4.2M $1.4M $18.1M
2021 $1.4M $1.2M $15.2M

Between 2021 and 2025, reported annual revenue grew from $1.4M to $4.4M (+212%), with total assets most recently reported at $38.9M.

Interactive year-over-year charts and full filing details available with membership.

See the full picture for THE SLATE SCHOOL INC

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