OPEN SOCIETY INSTITUTE

Nonpartisan civic infrastructure

AllCiv·Legis1

Open Society Institute

Private foundation

DBA: % MAIJA ARBOLINO

Foundations · NEW YORK, NY · EIN 13-7029285

In care of Maija Arbolino

Donations are tax-deductible

FY ending 2022-12-31

Revenue

—

Expenses

—

Assets

$5.3B

Liabilities

$748.1M

No revenue/expense data reported.

Campaign Spending

—

Lobbying

—

Grants Given

$221.9M

OPEN SOCIETY INSTITUTE

Your actions

224 W 57TH ST FL 4th/desk 410B

New YORK, NY, 10019-321

Public records

Full 990 PDFs going back to 2001, plus parsed financial extracts. The easiest place to read actual filings.

IRS-side authoritative source. Confirms current exempt status and pulls the latest determination letter.

These open in a new tab. AllCiv doesn't host filings directly — these are the authoritative public-record sources.