Join or renew your support to help us protect land for people, for habitat, forever.
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OSI is the fiscal sponsor for over 40 groups.
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OSI is a nonprofit, tax-exempt charitable organization under Section 501(c)(3) of the Internal Revenue Code. Your contribution is 100% tax-deductible to the fullest extent of the law.
Tax ID#: 52-1053406
For more information or questions please contact:
212-290-8200 x 288