- Is Open Window Institute a tax-exempt 501(c)(3)?
- Yes — Open Window Institute is recognised by the IRS as a 501(c)(3) organisation (EIN 41-4565207). The IRS recognised Open Window Institute as tax-exempt in March 2026.
- What is Open Window Institute's EIN?
- Open Window Institute's Employer Identification Number (EIN) is 41-4565207. The EIN was assigned by the IRS in March 2026. Donors and grantmakers use the EIN to verify tax-exempt status with the IRS.
- What does Open Window Institute do?
- Open Window Institute is registered with the IRS as a arts, culture & humanities nonprofit organisation. A detailed mission statement is not available on its most recent Form 990 filing.
- Where is Open Window Institute located?
- Open Window Institute is located at 922 N San Dimas Ave, San Dimas, CA, 91773-1452.
- When was Open Window Institute founded or recognised by the IRS?
- Open Window Institute was recognised by the IRS as a tax-exempt organisation in March 2026. The IRS ruling date is the earliest authoritative date available for most US nonprofits.
