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Oak School Parent Organization

EIN 36-3798041Hinsdale, ILEducationLatest 990 FY2025

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Listed with the IRS. Every screen came back clear.

A 501(c)(3) on Publication 78 and the IRS master file.

A paid feature, included from the $75 plan up. Sign in to download.Checked Nov 6, 2026, 6:16 AM ET
IRS nonprofit listing
No issue
Revocation
None
IRS files
Agree
Sanctions
No match
IRS bulletin
No notice
California
No record
Charity type
509(a)(1)

$196krevenue
FY2025 · −2% in 3 yrs
6 of 6years filed
’20’21’22’23’24’25
Revenue and spendingRevenueSpendingDeficit
$0$100k$200k$300k$400k’20’21’22’23’24’25
Against similar nonprofits FY2025
Operating margin77.7%
Months of reserve168.8mo
Revenue growth (annualized)+31.3%
Middle half of peersMedianOak School Parent Organization
Where the money goes FY2025 · $44k spent
Programs$38k87%Management and general$6k13%990 FY2025 · Part IX line 25